Railways NTPC (Technical Ability) Metal Forming, Casting and Cutting Question Bank

done Metal Cutting Total Questions - 117

• question_answer1)
  Tool life is generally specified by:
  A)
  Number of pieces machined done clear
  B)
  Volume of metal removed done clear
  C)
  Actual cutting time done clear
  D)
  Any of the above done clear
  View Solution play_arrow

• question_answer2)
  Tail stock set over method of taper turning is preferred for:
  A)
  Internal tapers done clear
  B)
  small tapers done clear
  C)
  Long slender tapers         done clear
  D)
  steep tapers done clear
  View Solution play_arrow

• question_answer3)
  Which of the following statements is incorrect with reference of lathe cutting tools?
  A)
  The flank of the tool is the surface below and adjacent to the cutting edges done clear
  B)
  The nose is the comer, or chamfer joining the side cutting and the end cutting edges done clear
  C)
  The heel is that part which is shaped to produce the cutting edges and face done clear
  D)
  The base is that surface of the shank which against the support and takes tangent done clear
  View Solution play_arrow

• question_answer4)
  In metal cutting, use of low feeds and high cutting speeds is desired when the objective is:
  A)
  High metal removal rate done clear
  B)
  Dry machining tool done clear
  C)
  Use of soft cutting tool done clear
  D)
  Surface finish done clear
  View Solution play_arrow

• question_answer5)
  A drill for drilling deep holes in aluminium should have:
  A)
  High helix angle  done clear
  B)
  taper shank done clear
  C)
  Small point angle            done clear
  D)
  no lip done clear
  View Solution play_arrow

• question_answer6)
  Gear lapping is:
  A)
  An operation after heat treatment done clear
  B)
  An operation prior to heat treatment done clear
  C)
  An independent operation for gear reconditioning done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer7)
  Gear burnishing process is for:
  A)
  Removing residual stresses from teeth roots done clear
  B)
  Surface finishing done clear
  C)
  Under-cut gears done clear
  D)
  cycloidal gears done clear
  View Solution play_arrow

• question_answer8)
  Buffing wheels are made of:
  A)
  Softer metals                  done clear
  B)
  cotton fabric done clear
  C)
  Carbon              done clear
  D)
  graphite done clear
  View Solution play_arrow

• question_answer9)
  In gear hobbing:
  A)
  Only hob rotates done clear
  B)
  Only gear blank rotates done clear
  C)
  Both hob and gear blank rotate done clear
  D)
  Neither hob nor gear blank rotates done clear
  View Solution play_arrow

• question_answer10)
  A surface finish of 0.025\[-\]0.1 micrometer CLA values is to be produced. Which machining process would you recommend?
  A)
  Grinding            done clear
  B)
  Rough turning done clear
  C)
  Lapping             done clear
  D)
  Honing done clear
  View Solution play_arrow

• question_answer11)
  CLA value for Honing process is:
  A)
  6                                  done clear
  B)
  \[0.05-3.0\] done clear
  C)
  \[0.05-1.0\]                    done clear
  D)
  \[0.025-0.1\] done clear
  View Solution play_arrow

• question_answer12)
  The installation cost of a machine is Rs. 2000. The cost of repairs increases Rs.  40 annual). The scrap value of the machine is Rs. 200. The economic repair life of the machine is nearly:
  A)
  \[5\frac{1}{2}\] Years                 done clear
  B)
  \[7\frac{1}{2}\] years            done clear
  C)
  \[9\frac{1}{2}\] Years                 done clear
  D)
  \[11\frac{1}{2}\] years  done clear
  View Solution play_arrow

• question_answer13)
            Which of the following given the correct order of increasing hot hardness of cutting tool materials?
  A)
  Diamond, Carbide, HSS done clear
  B)
  Carbide, Diamond, HSS done clear
  C)
  HSS, Carbide, Diamond done clear
  D)
  HSS, Diamond, Carbide done clear
  View Solution play_arrow

• question_answer14)
  If the chip-tool contact length is reduced slightly by grinding the tool face, then:
  A)
  Both cutting force and interface temperature would decrease done clear
  B)
  Both cutting force and interface temperature would increase                              done clear
  C)
  The cutting force would decrease but the interface temperature would increase          done clear
  D)
  The cutting force would increase but the interface temperature would decrease done clear
  View Solution play_arrow

• question_answer15)
           Tool life in the case of a grinding wheel is the time:
  A)
  Between two successive wheel dressing       done clear
  B)
  Taken for the wheel to be balanced            done clear
  C)
  Taken between two successive wheel balancing done clear
  D)
  Taken for a wear of 1 mm on its diameter done clear
  View Solution play_arrow

• question_answer16)
        For achieving a specific surface finish in single point turning, the most important factor to be considered is
  A)
  Depth of cut                   done clear
  B)
  cutting speed       done clear
  C)
  Feed                              done clear
  D)
  tool rake angle done clear
  View Solution play_arrow

• question_answer17)
       In ASA System, if the tool nomenclature is \[8-6-5-5-10-15-2\] mm, then the side rake angle will be
  A)
  \[5{}^\circ \]                             done clear
  B)
  \[6{}^\circ \]       done clear
  C)
  \[8{}^\circ \]                             done clear
  D)
  \[10{}^\circ \] done clear
  View Solution play_arrow

• question_answer18)
  Match List-I with List-II and select the correct answer using the codes given below the lists:

  List-I (Cutting Tool Material)		List-II (Major Characteristic Constituent)
  A.	High speed steel	1.	Carbon
  B.	Satellite	2.	Molybdenum
  C.	Diamond	3.	Nitride
  D.	Coated carbide tool	4.	Columbium
  		5.	Cobalt

  Codes:
  A)
  A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]5 done clear
  B)
  A\[\to \]2, B\[\to \]5, C\[\to \]1, D\[\to \]3 done clear
  C)
  A\[\to \]5, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
  D)
  A\[\to \]5, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
  View Solution play_arrow

• question_answer19)
  Consider the following parameters:

  1. Grinding wheel diameter.

  2. Regulating wheel diameter.

  3. Speed of the grinding wheel.

  4. Speed of the regulating wheel

  5. Angle between the axes of grinding and regulating wheels.

  Among these parameters, those which influence the axial feed rate in centreless grinding would include:
  A)
  2, 4 and 5                      done clear
  B)
  1, 2 and 3 done clear
  C)
  1, 4 and 5                      done clear
  D)
  3, 4 and 5 done clear
  View Solution play_arrow

• question_answer20)
  It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm.If the spindle speed is 60 rpm, then the speed of the lead screw will be:
  A)
  10 rpm              done clear
  B)
  20 rpm done clear
  C)
  120 rmp                        done clear
  D)
  180 rpm done clear
  View Solution play_arrow

• question_answer21)
  What is the variation of cutting speed with tool life on Log-Log Scale?
  A)
  Parabolic variation   done clear
  B)
  Straight line variation done clear
  C)
  Hyperbolic variation done clear
  D)
  Elliptical variation done clear
  View Solution play_arrow

• question_answer22)
  In a miling machine two side milling cutters are mounted with a desired distance between them so mat both sides of the workpiecc can be milled simultaneously. What is this setup called?
  A)
  Gang milling                   done clear
  B)
  Straddle milling done clear
  C)
  String milling                  done clear
  D)
  Side milling done clear
  View Solution play_arrow

• question_answer23)
  The ratio of time of return stroke to time of forward stroke of a shaping machine is 0.6. The stroke is 250 mm and it makes 30 double strokes per minute. What is the overall average speed of operation?
  A)
  3.75 m/min                    done clear
  B)
  5.0 m/min done clear
  C)
  7.5 m/min                      done clear
  D)
  12 m/min done clear
  View Solution play_arrow

• question_answer24)
  Why does crater wear start at some distance from the tool tip?
  A)
  Tool strength is minimum at that region. done clear
  B)
  Cutting fluid cannot penetrate that region. done clear
  C)
  Tool temperature is maximum in that region done clear
  D)
  Stress on rake face is maximum at that region. done clear
  View Solution play_arrow

• question_answer25)
  Which one of the following statements is correct? In the orthogonal cutting system, the cutting edge is:
  A)
  Perpendicular to shear plane done clear
  B)
  Perpendicular to direction of tool travel done clear
  C)
  Perpendicular to direction of depth of cut done clear
  D)
  In line with direction of tool travel done clear
  View Solution play_arrow

• question_answer26)
  Which one of the following is not a characteristic of ceramic tools?
  A)
  Produced by sintering process done clear
  B)
  Hot hardness up to \[1400{}^\circ C\] done clear
  C)
  Exhibit high coefficient of friction with most work materials done clear
  D)
  Tool tips are highly brittle done clear
  View Solution play_arrow

• question_answer27)
  What is the distance through which the cutter has to move before the full depth of cut is acquired in milling? Where D = diameter of the milling cutter and D = depth of cut.
  A)
  \[\sqrt{d(D-d)}\]              done clear
  B)
  \[\sqrt{D(D-d)}\] done clear
  C)
  \[\sqrt{(D-d)d/2}\]                       done clear
  D)
  \[\sqrt{(D-d)d/2}\] done clear
  View Solution play_arrow

• question_answer28)
  Crater wear occurs mainly due to which one of the following?
  A)
  Adhesion                       done clear
  B)
  diffusion done clear
  C)
  Oxidation                      done clear
  D)
  abrasion done clear
  View Solution play_arrow

• question_answer29)
  In idealized chip formation, built-up edge will break off and remove some of the cutting tool materials, thereby reducing tool life. Which of the following steps prevent built-up edge?

  1. Increasing cutting speed

  2. Increasing feed rate

  3. Increasing ambient workpiece temperature

  4. Decreasing rake angle

  5. Reducing friction.

  Select the correct answer using the code given below:
  A)
  1, 2 and 3                      done clear
  B)
  2, 3 and 4 done clear
  C)
  1, 3 and 5                      done clear
  D)
  2, 4 and 5 done clear
  View Solution play_arrow

• question_answer30)
  Turning operation, the feed could be doubled to increase the metal removal rate. To keep the same level of surface finish, the nose radius of the tool should be:
  A)
  Halved              done clear
  B)
  Kept unchanged done clear
  C)
  Doubled             done clear
  D)
  made four times done clear
  View Solution play_arrow

• question_answer31)
  Match List-1 with List-11 and select the correct answer using the codes given below the lists:

  List-I (Machine Tool Cutting  Too)		List-II (Part/Characteristics)
  A.	Screw cutting lathe	1.	Self-locking taper
  B.	Drill	2.	Chasing dial
  C.	End mill	3.	Wiper insert
  D.	Grinding wheel	4.	Self-releasing taper
  		5.	Balance weights

  Codes:
  A)
  A\[\to \]4, B\[\to \]5, C\[\to \]3, D\[\to \]1 done clear
  B)
  A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]5 done clear
  C)
  A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]5 done clear
  D)
  A\[\to \]2, B\[\to \]5, C\[\to \]4, D\[\to \]1 done clear
  View Solution play_arrow

• question_answer32)
  Maximum production of small and slender parts is done by:
  A)
  Watch maker's lathe done clear
  B)
  Sliding head stock automatic lathe done clear
  C)
  Multi-spindle automatic lathe done clear
  D)
  Capstan lathe done clear
  View Solution play_arrow

• question_answer33)
  Which of the following can be used in dynamometer for measuring cutting forces?

  1. Strain gauge

  2. Peizoelectric transducer

  3. Pneumatic transducer

  4. Hydraulic transducer.

  A)
  1 and 2             done clear
  B)
  1, 3 and 4 done clear
  C)
  2, 3 and 4                      done clear
  D)
  1, 2, 3 and 4 done clear
  View Solution play_arrow

• question_answer34)
  Low helix angle drills are preferred for drilling holes in:
  A)
  Plastics              done clear
  B)
  copper done clear
  C)
  Cast steel                       done clear
  D)
  carbon steel done clear
  View Solution play_arrow

• question_answer35)
  Shell reamers are mounted on:
  A)
  Tool holders                   done clear
  B)
  armour plates done clear
  C)
  Arbors               done clear
  D)
  Shanks done clear
  View Solution play_arrow

• question_answer36)
  A set of eight form relieved milling cutters for each module is provided to enable eating of gears of different:
  A)
  Materials done clear
  B)
  Types, e.g., spur, helical, etc. done clear
  C)
  Number of teeth" done clear
  D)
  Width of gears done clear
  View Solution play_arrow

• question_answer37)
  Which of the machine tools can be used for boring?

  1. Lathe

  2. Drilling machine

  3. Vertical milling machine

  4. Horizontal milling machine

  A)
  1, 2, 3               done clear
  B)
  1, 3, 4 done clear
  C)
  2 and 4             done clear
  D)
  1, 2, 3, 4 done clear
  View Solution play_arrow

• question_answer38)
   Which Machining of titanium is difficult due to:
  A)
  High thermal conductivity of titanium done clear
  B)
  Chemical reaction between tool and work done clear
  C)
  Low tool-chip contact area done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer39)
  Tool life is generally better when:
  A)
  Grain size of the metal is large done clear
  B)
  Grain size of the metal is small done clear
  C)
  Hard constituents are present in the microstructure of the tool material done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer40)
  Ease of machining is primarily judged by:
  A)
  Life of cutting tool between sharpening done clear
  B)
  Rigidity of workpiece done clear
  C)
  Microstructure of tool material done clear
  D)
  Shape and dimensions of work done clear
  View Solution play_arrow

• question_answer41)
  A ?Dynamometer' is a device used for the measurement of:
  A)
  Chip thickness ratio done clear
  B)
  Forces during metal cutting done clear
  C)
  Wear of the cutting tool done clear
  D)
  Deflection of the cutting tool done clear
  View Solution play_arrow

• question_answer42)
  The main purpose of boring operation, as compared to drilling is to:
  A)
  Drill a hole done clear
  B)
  Finish drilled hole done clear
  C)
  Correct the hole done clear
  D)
  Enlarge the existing hole done clear
  View Solution play_arrow

• question_answer43)
  Climb milling is chosen while machining because:
  A)
  The chip thickness increases gradually done clear
  B)
  It enables the cutter to dig in and start the cut done clear
  C)
  The specific power consumption is reduced done clear
  D)
  Better surface finish can be obtained done clear
  View Solution play_arrow

• question_answer44)
  Internal gears can be made by:
  A)
  Hobbing done clear
  B)
  Shaping with pinion cutter done clear
  C)
  Shaping with rack cutter done clear
  D)
  Milling done clear
  View Solution play_arrow

• question_answer45)
  A hole of 30 mm diameter is to be produced by reaming. The minimum diameter permissible is 30.00 mm while the maximum diameter permissible is 30.05 mm. In this regard, consider the following statements about the reamer size:

  1. The minimum diameter of the reamer cab be less than 30 mm.

  2. The minimum diameter of the reamer cannot he less than 30 mm.

  3. The maximum diameter of the reamer can be more than 30.05 mm.

  4. The maximum diameter of the reamer must be less than 30.05 mm.

  Of these statements:                              
  A)
  1 and 4 are correct          done clear
  B)
  1 and 3 are correct    done clear
  C)
  2 and 3 are correct          done clear
  D)
  2 and 4 are correct done clear
  View Solution play_arrow

• question_answer46)
     In centreless grinding, the workpiece centre will be:
  A)
  Above the line joining the two wheel centres    done clear
  B)
  Below the line joining the two wheel centres    done clear
  C)
  On the line joining the two wheel centres       done clear
  D)
  At the intersection of the line joining the wheel centres with the work plate plane done clear
  View Solution play_arrow

• question_answer47)
                 The following parameters determine the model off continuous chip formation:                    

  1. True feed

  2. Cutting velocity

  3. Chip thickness

  4. Rake angle of the cutting tool.

  The parameters which govern the value of shear angle would include:                              
  A)
  1, 2 and 3                      done clear
  B)
  1, 3 and 4        done clear
  C)
  1, 2 and 4                      done clear
  D)
  2, 3 and 4  done clear
  View Solution play_arrow

• question_answer48)
       What is the correct sequence of the following parameters in order of their maximum to minimum influence on tool life?                      

  1. Feed rate

  2. Depth of cut

  3. Cutting speed

  Select the correct answer using the codes below:                                  
  A)
  1, 2, 3               done clear
  B)
  3, 2, 1          done clear
  C)
  2, 3, 1               done clear
  D)
  3, 1, 2 done clear
  View Solution play_arrow

• question_answer49)
           Tool geometry of a single point cutting tool is specified by the following elements:       

  1. Back rake angle

  2. Side rake angle

  3. End cutting code angle

  4. Side cutting code angle

  5. Side relief angle

  6. End relief angle

  7. Nose radius

  The correct sequence of these tool elements used for correctly specifying tool geometry is:
  A)
  1, 2, 3, 6, 5, 4, 7            done clear
  B)
  1, 2, 6, 5, 3, 4, 7 done clear
  C)
  1, 2, 5, 6, 3, 4, 7            done clear
  D)
  1, 2, 6, 3, 4, 7 done clear
  View Solution play_arrow

• question_answer50)
  Consider the following tool materials:

  1. Carbide

  2. Cermet

  3. Ceramic

  4. Borazon

  The correct sequence of these tool materials in increasing order of the their ability to retain their hot hardness is:
  A)
  1, 2, 3, 4                       done clear
  B)
  1, 2, 4, 3 done clear
  C)
  2, 1, 3, 4                       done clear
  D)
  2, 1, 4, 3 done clear
  View Solution play_arrow

• question_answer51)
  The ratio of thrust force to cutting force is nearly 2.5 in:
  A)
  Turning              done clear
  B)
  broaching done clear
  C)
  Grinding            done clear
  D)
  plain milling done clear
  View Solution play_arrow

• question_answer52)
  Which one of the following operations is carried out at the minimum cutting velocity if the machines are equally rigid and the tool work materials are the same?
  A)
  Turning              done clear
  B)
  Grinding done clear
  C)
  Boring               done clear
  D)
  Milling done clear
  View Solution play_arrow

• question_answer53)
  Given that cutting speed = 9 m/min, the return time to cutting time ratio is = 1 : 2 to the feed rate = 0.3 mm/stroke, the clearance at each of cut = 25 mm and that the plate is fixed 700 mm side along the direction of tool travel, the time required for finishing one flat surface of a plate of size \[700\times 300\,\,mm\] in a shaper, will be:
  A)
  10 min              done clear
  B)
  12.5 min done clear
  C)
  15 min              done clear
  D)
  20 min done clear
  View Solution play_arrow

• question_answer54)
  Consider the following statements regarding grinding of high carbon steel:

  1. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit

  2. Aluminium oxide wheels are employed

  3. The grinding wheel has to be of open structure.

  Of these statements:
  A)
  1, 2 and 3 are correct done clear
  B)
  1 and 2 are correct done clear
  C)
  1 and 3 are correct done clear
  D)
  2 and 3 are correct done clear
  View Solution play_arrow

• question_answer55)
  Enlarging an existing circular hole with rotating single point tool is called:
  A)
  Boring               done clear
  B)
  drilling done clear
  C)
  Reaming                        done clear
  D)
  internal turning done clear
  View Solution play_arrow

• question_answer56)
  Consider the following operations:

  1. Cutting key ways on shafts

  2. Cutting external screw threads

  3. Cutting teeth of spur gears

  4. Cutting external splines

  Those which can be performed with milling cutters would include:
  A)
  1 and 2             done clear
  B)
  2, 3 and 4 done clear
  C)
  1 and 3             done clear
  D)
  1, 2, 3 and 4 done clear
  View Solution play_arrow

• question_answer57)
  Consider the following machine tools:

  1. Hobbing machine

  2. Gear shaping machine

  3. Broaching machine

  The teeth of internal spur gears can be cut in:
  A)
  1, 2 and 3                      done clear
  B)
  1 and 2 done clear
  C)
  1 and 3             done clear
  D)
  2 and 3 done clear
  View Solution play_arrow

• question_answer58)
  In reaming process:
  A)
  Metal removal rate is high done clear
  B)
  High surface finish is obtained done clear
  C)
  High form of accuracy is obtained done clear
  D)
  High dimensional accuracy. done clear
  View Solution play_arrow

• question_answer59)
  The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at cutting velocity of 18 m/min is:
  A)
  1.02                              done clear
  B)
  1.32 done clear
  C)
  1.06                              done clear
  D)
  1.82 done clear
  View Solution play_arrow

• question_answer60)
  The angle between the face and the flank of the single point cutting tool is known as:
  A)
  Rake angle                     done clear
  B)
  clearance angle done clear
  C)
  Lip angle                       done clear
  D)
  point angle done clear
  View Solution play_arrow

• question_answer61)
  Single point thread cutting tool should ideally have:
  A)
  Zero rake                       done clear
  B)
  Positive rake done clear
  C)
  Negative rake     done clear
  D)
  Normal rake done clear
  View Solution play_arrow

• question_answer62)
  Consider the following statements about nose radius:

  1. It improves tool life.

  2. It reduces the cutting force.

  3. It improves the surface finish.

  Of these statements:
  A)
  1 and 2 are correct          done clear
  B)
  2 and 3 are correct done clear
  C)
  1 and 3 are correct done clear
  D)
  1, 2 and 3 are correct done clear
  View Solution play_arrow

• question_answer63)
  The compositions of some of the alloy steels are as under:

  1. 18 W 4 Ct 1 V

  2. 12 Mo I W 4 Cr IV

  3. 6 Mo 6 W 4 Cr 1 V

  4. 18 W 8 Cr IV

  The compositions of commonly used high speed steels would in clude:
  A)
  1 and 2             done clear
  B)
  2 and 3 done clear
  C)
  1 and 4             done clear
  D)
  1 and 3 done clear
  View Solution play_arrow

• question_answer64)
  The straight grades of cemented carbide cutting tool materials contain:
  A)
  Tungsten carbide only done clear
  B)
  Tungsten carbide and titanium carbide done clear
  C)
  Tungsten carbide and cobalt done clear
  D)
  Tungsten carbide and coal carbide done clear
  View Solution play_arrow

• question_answer65)
  Match List-I with List-II and select the correct answer using the codes given below the lists:

  List-I (Wear type)		List-II (Associated mechanism)
  A.	Abrasive wear	1.	Galvanic action
  B.	Adhesive wear	2.	Polughing action
  C.	Electrolytic wear	3.	Molecular transfer
  D.	Diffusion wear	4.	Plastic deformation
  		5.	Metallic bond.

  Codes:
  A)
  A\[\to \]2, B\[\to \]2, C\[\to \]1, D\[\to \]3 done clear
  B)
  A\[\to \]5, B\[\to \]5, C\[\to \]1, D\[\to \]3 done clear
  C)
  A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 done clear
  D)
  A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]4 done clear
  View Solution play_arrow

• question_answer66)
  Crater wear is predominant in:
  A)
  Carbon steel tools done clear
  B)
  Tungsten carbide tools done clear
  C)
  High speed steel .tools done clear
  D)
  Ceramic tools done clear
  View Solution play_arrow

• question_answer67)
  Consider the following work materials:

  1. Titanium

  2. Mild steel

  3. Stainless steel

  4. Grey cast iron.

  The correct sequence of these materials in terms of increasing order of difficulty in machining is:
  A)
  4, 2, 3, 1                       done clear
  B)
  4, 2, 1, 3 done clear
  C)
  2, 4, 3, 1                       done clear
  D)
  2, 4, 1, 3 done clear
  View Solution play_arrow

• question_answer68)
  The primary tool force used in calculating the total power consumption in machining is the:
  A)
  Radial force                    done clear
  B)
  tangential force done clear
  C)
  Axial force                     done clear
  D)
  frictional force done clear
  View Solution play_arrow

• question_answer69)
  In the grinding wheel of A 60 G 7 B 23, B stands for:
  A)
  Resinoid bond     done clear
  B)
  rubber bond done clear
  C)
  Shellac bond                  done clear
  D)
  silicate bond done clear
  View Solution play_arrow

• question_answer70)
  Soft material cannot be economically ground due to:
  A)
  The high temperatures involved done clear
  B)
  Frequent wheel clogging done clear
  C)
  Rapid wheel wear done clear
  D)
  Low workpiece stiffness done clear
  View Solution play_arrow

• question_answer71)
  The effects of setting a boring tool above centre height leads to a/an:
  A)
  Increase in the effective rake angle and a decrease in the effective clearance angle done clear
  B)
  Increase in both effective rake angle and effective clearance angle done clear
  C)
  Decrease in the effective rake angle and an increase in the effective clearance angle done clear
  D)
  Decrease in both effective rank angle and effective clearance angle done clear
  View Solution play_arrow

• question_answer72)
  In a milling operation two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can he milled simultaneously. This set-up is called;
  A)
  Gang milling                   done clear
  B)
  straddle milling done clear
  C)
  String milling                  done clear
  D)
  side milling done clear
  View Solution play_arrow

• question_answer73)
  Match List-I with List-II and select the correct answer using the codes given below the lists:

  List-I (Product)		List-II (Process of Manufacture)
  A.	Automobile piston in aluminium alloy	1.	Pressure die-casting
  B.	Engine crankshaft spheroidal graphite-iron casting	2.	Gravity die-casting
  C.	Carburettor housing in aluminium alloy	3.	Sand casting
  D.	Cast titanium blades	4.	Precision investment easting
  		5.	Shell moulding.

  Codes:
  A)
  A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]5 done clear
  B)
  A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]5 done clear
  C)
  A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 done clear
  D)
  A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
  View Solution play_arrow

• question_answer74)
  Chip equivalent is increased by:
  A)
  An increase in side-cutting edge angle of tool done clear
  B)
  An increase in nose radius and side cutting edge angle of tool done clear
  C)
  Increasing the plant area of cut done clear
  D)
  Increasing the depth of cut done clear
  View Solution play_arrow

• question_answer75)
  Cubic boron nitride:
  A)
  Has a very high hardness which is comparable to that of diamon done clear
  B)
  Has a hardness which is slightly more than due of HSS done clear
  C)
  Is used for making cylinder blocks of aircraft engines                                    done clear
  D)
  Is used for making optical glasses done clear
  View Solution play_arrow

• question_answer76)
             The limit to the maximum hardness of a work material which can be machined with HSS tools even at low speeds is set by which one of the following tool failure mechanisms?                                 
  A)
  Attrition                                         done clear
  B)
  Abrasion                                      done clear
  C)
  Diffusion                                       done clear
  D)
  Plastic deformation under compression done clear
  View Solution play_arrow

• question_answer77)
         A machinist desires to turn a round steel stock of outside diameter 100 mm at 1000 rpm. The material has tensile strength of 75 kg/mm. The depth of cut chosen is 3 mm at a feed rate of 0.3 mm/rev. Which one of the following tool materials will be suitable for machining the component under the specified cutting conditions?                         
  A)
  Sintered carbides done clear
  B)
  Ceramic                                  done clear
  C)
  HSS                              done clear
  D)
  Diansond done clear
  View Solution play_arrow

• question_answer78)
                                   Notch wear at the outside edge of the depth of cut is due to:
  A)
  Abrasive action of the work hardened chip material done clear
  B)
  Oxidation done clear
  C)
  Slip-stick action of the chip done clear
  D)
  Chipping done clear
  View Solution play_arrow

• question_answer79)
  Which of the following indicate better machinability?

  1. Smaller shear angle

  2. Higher cutting force

  3. Longer tool life

  4. Better surface finish.

  A)
  1 and 3             done clear
  B)
  2 and 4 done clear
  C)
  1 and 2             done clear
  D)
  3 and 4 done clear
  View Solution play_arrow

• question_answer80)
  Small amounts of which one of the following elements/pairs of elements is added to steel to increase its machinability?
  A)
  Nickel    done clear
  B)
  sulphur and phosphorus done clear
  C)
  Silicon   done clear
  D)
  Manganese and copper done clear
  View Solution play_arrow

• question_answer81)
  In turning of slender rods, it is necessary to keep the transverse force minimum mainly?
  A)
  Improve the surface finish done clear
  B)
  Increase productivity done clear
  C)
  Improve cutting efficiency done clear
  D)
  Reduce vibrations and chatter done clear
  View Solution play_arrow

• question_answer82)
  Which of the following forces are measured directly by strain gauges or force dynamometers during metal cutting?

  1. Force exerted by the tool on the chip acting normally to the tool face

  2. Horizontal cutting force exerted by the tool on the workpiece

  3. Frictional resistance of the tool against the chip flow acting along the tool face

  4. Vertical force which helps in holding the tool in position.

  A)
  1 and 3             done clear
  B)
  2 and 4 done clear
  C)
  1 and 4             done clear
  D)
  2 and 4 done clear
  View Solution play_arrow

• question_answer83)
  Specific energy requirements in a grinding process are more than those in turning for the same metal removal rate because of the:
  A)
  Specific pressures between wheel and work being high done clear
  B)
  Size effect of the larger contact areas between wheel and work done clear
  C)
  High cutting velocities done clear
  D)
  High heat produced during grinding done clear
  View Solution play_arrow

• question_answer84)
  A grinding wheel of 150 mm diameter is rotating at 3000 rpm. The grinding speed is:
  A)
  \[7.5\,\pi \,\text{m/s}\]                done clear
  B)
  \[15\,\pi \,\text{m/s}\] done clear
  C)
  \[45\,\pi \text{m/s}\]                   done clear
  D)
  \[450\,\pi \,\text{m/s}\] done clear
  View Solution play_arrow

• question_answer85)
  Grinding wheel is said to be loaded when the:
  A)
  Metal particles get embedded in the wheel surface blocking the interspaces between cutting grains done clear
  B)
  Hounding material comes on the surface and the wheel becomes blunt done clear
  C)
  workpiece being ground comes to a stop in cylindrical grinding done clear
  D)
  Grinding wheel stops because of very large depth of cut done clear
  View Solution play_arrow

• question_answer86)
  Which of the following statements are correct?

  1. A boring machine is suitable for a job shop

  2. A jig boring machine is designed specially for doing more accurate work when compared to a vertical milling machine

  3. A vertical precision boring machine is suitable for boring holes in cylinder blocks and liners

  A)
  1, 2 and 3                      done clear
  B)
  1 and 2 done clear
  C)
  2 and 3             done clear
  D)
  1 and 3 done clear
  View Solution play_arrow

• question_answer87)
  Consider the following processes for gear manufacture:

  1. Milling with form cutter

  2. Rack type gear shaper (gear planer)

  3. Rotary gear shaper (gear shaper)

  4. Gear bobbing.

  The correct sequence of these processes in increasing order of accuracy of convolute profile of the gear is:
  A)
  3, 2, 4, 1                       done clear
  B)
  2, 3, 4, 1 done clear
  C)
  3. 2, 1, 4                       done clear
  D)
  2, 3, 1, 4 done clear
  View Solution play_arrow

• question_answer88)
  Gear cutting on a milling machine using an involute profile cutter is a:
  A)
  Gear forming process done clear
  B)
  Gear generating process done clear
  C)
  Gear shaping process done clear
  D)
  Highly accurate gear-producing process. done clear
  View Solution play_arrow

• question_answer89)
  For the manufacture of full depth spur gear by hobbing process, the number of teeth to be cut = 30, module = 3 mm and pressure angle = \[20{}^\circ \] The radial depth of cut to be employed should be equal to:
  A)
  3.75 mm                       done clear
  B)
  4.50 mm done clear
  C)
  6.00 mm                       done clear
  D)
  6.75 mm done clear
  View Solution play_arrow

• question_answer90)
  In orthogonal cutting, the depth of cut is 03 mm at a cutting speed of 2 m/s. If the chip thickness is 0.75 mm, the velocity is:
  A)
  133 m/s             done clear
  B)
  2 m/s done clear
  C)
  23 m/s               done clear
  D)
  3 m/s done clear
  View Solution play_arrow

• question_answer91)
  Consider the following elements:

  1. Nose radius

  2. Cutting speed

  3. Depth of cut

  4. Feed.

  The correct sequence of these elements in decreasing order of their influence on tool life is:
  A)
  2, 4, 3, 1                       done clear
  B)
  4, 2, 3, 1 done clear
  C)
  2, 4, 1, 3                       done clear
  D)
  4, 2, 1, 3 done clear
  View Solution play_arrow

• question_answer92)
  The rake angle in a twist drill:
  A)
  Varies from minimum near the dead centre to a maximum value at the periphery done clear
  B)
  Is maximum at the dead centre and zero at the periphery done clear
  C)
  Is constant at every point of the cutting edge done clear
  D)
  Is a function of the size of the chisel edge done clear
  View Solution play_arrow

• question_answer93)
  Which one of the following processes does not cause tool wear?
  A)
  Ultrasonic machining done clear
  B)
  Electrochemical machining done clear
  C)
  Electric discharge machining done clear
  D)
  Anode mechanical machining done clear
  View Solution play_arrow

• question_answer94)
  Consider the following forces acting on a finish 1 turning tool:

  1. Feed force

  2. Thrust force

  3. Cutting force.

  The correct sequence of the decreasing order of the magnitudes of these forces is:
  A)
  1, 2, 3               done clear
  B)
  2, 3, 1 done clear
  C)
  3, 1, 2               done clear
  D)
  3, 2, 1 done clear
  View Solution play_arrow

• question_answer95)
  Match List-I (Type of drill) with List-II (Application) and select the correct answer using the codes given below the lists:

  List-I		List-II
  A.	Straight shank	1.	Soft materials
  B.	Taper shank	2.	Deep holes
  C.	Single flute	3.	General purpose
  D.	High helix	4.	Small hole diameter

  Codes:
  A)
  A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
  B)
  A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
  C)
  A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
  D)
  A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
  View Solution play_arrow

• question_answer96)
  Which of the following are the advantages of a hydraulic; shaper over mechanically driven shaper?

  1. More strokes per minute can he obtained at a given cutting speed

  2. The cutting strokes has a definite stopping point

  3. It is simpler in construction

  4. Cutting speed is constant throughout most of shecurl.

  Select the correct answer using the codes given below:
  A)
  1 and 2             done clear
  B)
  1 and 4 done clear
  C)
  2 and 4             done clear
  D)
  1, 3 and 4 done clear
  View Solution play_arrow

• question_answer97)
  Consider the following operations:

  1. Undercutting

  2. Plain turning

  3. Taper turning

  4. Thread cutting

  The correct sequence of these operations in machining a product is:
  A)
  2, 3, 4, 1                       done clear
  B)
  3, 2, 4, 1 done clear
  C)
  2, 3, 1, 4                       done clear
  D)
  3, 2, 1, 4 done clear
  View Solution play_arrow

• question_answer98)
  Which one of the following materials is used as the bonding material for grinding wheels?
  A)
  Silicon carbide    done clear
  B)
  Sodium silicate done clear
  C)
  Boron carbide     done clear
  D)
  Aluminium oxide done clear
  View Solution play_arrow

• question_answer99)
  Consider the following statements:

  In Up milling process,

  1. The cutter starts the cut from the machined surface and proceeds upwards

  2. The cutter starts the cut from the top surface and proceeds downwards

  3. The job is fed in a direction opposite to that of cutter rotation

  4. The job is fed in the same direction as that of cutter rotation.

  Of these statements:
  A)
  1 and 3 are correct          done clear
  B)
  1 and 4 are correct done clear
  C)
  2 and 3 are correct          done clear
  D)
  2 and 4 are correct done clear
  View Solution play_arrow

• question_answer100)
  Which of the following motions are not needed for spur gear cutting with a hob?

  1. Rotary motion of hob

  2. Linear axial reciprocatory motion of hob

  3. Rotary motion of gear blank

  4. Radial advancement of hob.

  Select the correct answer using the codes given below:
  A)
  1, 2 and 3                      done clear
  B)
  1, 3 and 4             done clear
  C)
  1, 2 and 4                      done clear
  D)
  2, 3 and 4  done clear
  View Solution play_arrow

• question_answer101)
            Match List-I (Gear component) with List-II (Preferred method of manufacturing) and select the correct answer using the codes given below the lists:

  List-I		List-II
  A.	Gear for clocks	1.	Hobbing
  B.	Bakelite gears	2.	Stamping
  C.	Aluminium gears	3.	Powder compacting
  D.	Automobile transmission gears	4.	Sand casting
  		5.	Extrusion

  Codes:
  A)
  A\[\to \]2, B\[\to \]3, C\[\to \]5, D\[\to \]1 done clear
  B)
  A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
  C)
  A\[\to \]5, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
  D)
  A\[\to \]2, B\[\to \]4, C\[\to \]5, D\[\to \]3 done clear
  View Solution play_arrow

• question_answer102)
  A 400 mm long shaft has 100 mm tapered step at the middle with \[4{}^\circ \] inclined angle. The tailstock offset required to produce this taper on a lathe would be:
  A)
  400 sin \[4{}^\circ \]                  done clear
  B)
  400 sin \[2{}^\circ \]     done clear
  C)
  100 sin \[4{}^\circ \]                  done clear
  D)
  100 sin \[2{}^\circ \]     done clear
  View Solution play_arrow

• question_answer103)
    A single short thread of pitch 2 mm is to be produced on a lathe having a lead screw with a double start thread of pitch 4 mm. The ratio of speeds between the spindle and lead screw for this operation is:
  A)
  1 : 2                              done clear
  B)
  2 : 1 done clear
  C)
  1 : 4                              done clear
  D)
  4 : 1 done clear
  View Solution play_arrow

• question_answer104)
  Mate List-I with List-II and select the correct answer using the codes given below the lists:

  List-I		List-II
  A.	Reaming	1.	Smoothing and squaring surface around the hole for proper seating
  B.	Counter-boring	2.	Sizing and finishing the hole
  C.	Counter-sinking	3.	Enlarging the end of the hole
  D.	Spot facing	4.	Making a conical enlargement at the end of the hole

  Codes:
  A)
  A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
  B)
  A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 done clear
  C)
  A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
  D)
  A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
  View Solution play_arrow

• question_answer105)
  Which one of the following pairs of parameters am effects is not correctly matched?
  A)
  Large wheel diameter...Reduced wheel wear done clear
  B)
  Large depth of cut...Increased well wear done clear
  C)
  Large work diameter...Increased well wear done clear
  D)
  Large well speed... Reduced well wear done clear
  View Solution play_arrow

• question_answer106)
  A component requires a hole which must be within the two limits of 25.03 and 25.04 mm diameter. Which of the following statements about the reamer size are correct?

  1. Reamer size cannot be below 25.03 mm

  2. Reamer size cannot be above 25.04 mm

  3. Reamer size cannot he 25.03 mm

  4. Reamer size can be 25.04 mm

  Select the correct answer using the code given below:
  A)
  1 and 3             done clear
  B)
  1 and 2 done clear
  C)
  3 and 4             done clear
  D)
  2 and 4 done clear
  View Solution play_arrow

• question_answer107)
  Consider the following criteria in evaluation machinability:

  1. Surface finish

  2. Type of chips

  3. Tool life

  4. Power consumption

  In modern high speed CNC machining with coated carbide took, the correct sequence of these criteria in decreasing order of their importance is:
  A)
  1, 2, 4, 3                       done clear
  B)
  2, 1, 4, 3 done clear
  C)
  1, 2, 3, 4                       done clear
  D)
  2, 1, 3, 4 done clear
  View Solution play_arrow

• question_answer108)
  In metal cutting operation, the approximate ratio of heat distributed among chip, tool and work, in that order, is:
  A)
  80 : 10 : 10                    done clear
  B)
  33 : 33 : 33 done clear
  C)
  20 : 60 : 10                    done clear
  D)
  10 : 10 : 80 done clear
  View Solution play_arrow

• question_answer109)
  The gauge factor of a resistive pick-up of cutting force dynamometer is donned as the ratio of:
  A)
  Applied strain to the resistance of the wire done clear
  B)
  The proportional change in resistance to thi applied strain done clear
  C)
  The resistance to the applied strain done clear
  D)
  Change in resistance to the applied strain. done clear
  View Solution play_arrow

• question_answer110)
  Poor machinability of centrifugally cast iron pipe is due to:
  A)
  Chilling done clear
  B)
  Segregation done clear
  C)
  Dense structure done clear
  D)
  Highmould rotation speed done clear
  View Solution play_arrow

• question_answer111)
  Consider the following statements:

  For precision machining of non-ferrous alloys diamond is preferred because it has

  1. Low coefficient of thermal expansion

  2. High compression strength

  3. High compression strength

  4. How fracture toughness

  Which of these statements are correct?
  A)
  1 and 2             done clear
  B)
  2 and 4 done clear
  C)
  2 and 3             done clear
  D)
  3 and 4 done clear
  View Solution play_arrow

• question_answer112)
  The radical force in single-point tool during turning operation varies between:
  A)
  0.2 and 0.4 times the main cutting force done clear
  B)
  0.4 and 0.6 times the main cutting force done clear
  C)
  0.6 and 0.8 times the main cutting force done clear
  D)
  0.5 and 0.6 times the main cutting force done clear
  View Solution play_arrow

• question_answer113)
  Which one of the following sets of forces are encountered by a lathe parting/tool while groove cutting?
  A)
  Tangential, radial and axial done clear
  B)
  Tangential and radial done clear
  C)
  Tangential and axial done clear
  D)
  Radial and axial. done clear
  View Solution play_arrow

• question_answer114)
  Match List-I (Machining process) with List-II (Associated medium) and select the correct answer using the codes giver below the lists:

  List-I		List-II
  A.	Ultrasonic machining	1.	Kerosene
  B.	EDM	2.	Abrasive slurry
  C.	ECM	3.	Vacuum
  D.	EBM	4.	Salt solution

  Codes:
  A)
  A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
  B)
  A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3 done clear
  C)
  A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
  D)
  A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
  View Solution play_arrow

• question_answer115)
  In a single-point turning operation of steel with a cemented carbide tool, Taylor's tool life exponent is 0.25. If the cutting speed is halved, the tool life will increase by:
  A)
  Two times                      done clear
  B)
  four times done clear
  C)
  Eight times                     done clear
  D)
  sixteen times done clear
  View Solution play_arrow

• question_answer116)
  Consider the following approaches normally applied for the economic analysis of machining:

  1. Maximum production rate

  2. Maximum profit criterion

  3. Minimum cost criterion

  The correct sequence in ascending order of optimum cutting speed obtained by these approaches is:
  A)
  1, 2, 3               done clear
  B)
  1, 3, 2 done clear
  C)
  3, 2, 1               done clear
  D)
  3, 1, 2 done clear
  View Solution play_arrow

• question_answer117)
  Match List-I (ISO classification of carbide tools) with List-II (Applications) and select the correct answer using the codes given below the lists:

  List-I		List-II
  A.	\[P-10\]	1.	Non-ferrous, roughing cut
  B.	\[P-50\]	2.	Non-ferrous, finishing cut
  C.	\[K-10\]	3.	Ferrous material, roughing cut
  D.	\[K-50\]	4.	Ferrous material, finishing cut

  Codes:
  A)
  A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
  B)
  A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
  C)
  A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
  D)
  A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
  View Solution play_arrow