question_answer1) Scotch yoke mechanism is used to generate:
A) Sine functions done clear
B) square roots done clear
C) Logarithms done clear
D) inversions done clear
View Solution play_arrowA) 12 done clear
B) 16 done clear
C) 25 done clear
D) 32 done clear
View Solution play_arrowquestion_answer3) Inversion of a mechanism is:
A) Changing of a higher pair to lower pair done clear
B) Obtained by fixing different links in a kinematic chain done clear
C) Turning it upside down done clear
D) Obtained by reversing the input and output motion done clear
View Solution play_arrowA) \[45{}^\circ \] In the direction of rotation of the link containing the path done clear
B) \[45{}^\circ \] In the direction opposite to the rotation of the link containing the path done clear
C) \[90{}^\circ \] In the direction of rotation of the link containing the path done clear
D) \[180{}^\circ \] In the direction opposite to the rotation of the link containing the path done clear
View Solution play_arrowquestion_answer5) Match the following \[14\frac{1}{2}\] degree composite system of gears
List-I | List-II | ||
A. | Dedendum | 1. | \[\frac{2}{P}\] |
B. | Clearance | 2. | \[\frac{0.157}{P}\] |
C. | Working depth | 3. | \[\frac{1.157}{P}\] |
D. | Addendum | 4. | \[\frac{1}{P}\] |
A) A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
C) A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
D) A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 done clear
View Solution play_arrowA) 1 done clear
B) 2 done clear
C) 4 done clear
D) 8 done clear
View Solution play_arrowquestion_answer7) Which of the following are inversions of a double slider crank chain?
1. Whitworth return motion. |
2. Scotch Yoke, |
3. Oldham's Coupling. |
4. Rotary engine. |
Select correct answer using the codes given below: |
A) 1 and 2 done clear
B) 1, 3 and 4 done clear
C) 2 and 3 done clear
D) 2, 3 and 4 done clear
View Solution play_arrowList-I | List-II | ||
A. | Governor | 1. | Pantograph device |
B. | Automobile differential | 2. | Feed-back control |
C. | Dynamic Absorber | 3. | Epicyelic train |
D. | Engine Indicator | 4. | Two-mass oscillator |
A) A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 done clear
B) A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
C) A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
D) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
View Solution play_arrowquestion_answer9) Consider the following statements:
Coriolis component of acceleration depends on |
1. Velocity of slider. |
2. Angular velocity of the link. |
3. Acceleration of slider. |
4. Angular acceleration of link. |
A) 1 and 2 are correct done clear
B) 1 and 3 are correct done clear
C) 2 and 4 are correct done clear
D) 1 and 4 are correct done clear
View Solution play_arrowA) Coriolis and radial acceleration done clear
B) Radial and tangential acceleration done clear
C) Corioiis and gyroscopic acceleration done clear
D) Gyroscopic and tangential acceleration done clear
View Solution play_arrowA) Four times the first one done clear
B) Same as the first one done clear
C) One-fourth of the first one done clear
D) One and a half times the first one done clear
View Solution play_arrowList-I | List-II | ||
A. | Quadric cycle chain | 1. | Elliptic trammel |
B. | Single slider crank chain | 2. | Rapsons slide |
C. | Double slider crank chain | 3. | Ackerman steering |
D. | Crossed slider crank chain | 4. | Eccentric mechanism |
5. | Pendulum pump |
A) A\[\to \]5, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]3, B\[\to \]1, C\[\to \]5, D\[\to \]4 done clear
C) A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
D) A\[\to \]3, B\[\to \]5, C\[\to \]1, D\[\to \]2 done clear
View Solution play_arrowA) \[\frac{2{{K}_{e}}E}{{{K}_{s}}}\] done clear
B) \[\frac{{{K}_{e}}E}{2{{K}_{s}}}\] done clear
C) \[\frac{{{K}_{e}}E}{{{K}_{s}}}\] done clear
D) \[\frac{{{K}_{s}}E}{2{{K}_{e}}}\] done clear
View Solution play_arrowA) p = 0 and q is positive done clear
B) p is positive and q = 0 done clear
C) p is negative and q is positive done clear
D) p is positive and q is also positive done clear
View Solution play_arrowquestion_answer15) A system in dynamic balance implies that:
A) The system is critically damped done clear
B) There is no critical speed in the system done clear
C) The system is also statically balanced done clear
D) There will be absolutely no wear of bearings done clear
View Solution play_arrowA) A single mass in one of the planes of the revolving masses done clear
B) A single mass in a different plane done clear
C) Two masses in any two planes done clear
D) Two equal .masses in-any two planes done clear
View Solution play_arrowConsider the following statements in this regard: |
1. All points of the disc have the same velocity. |
2. The centre of the disc has zero acceleration. |
3. The centre of the disc has centrifugal acceleration. |
4. The point on the disc making contact with the plane surface has zero acceleration. |
A) 1 and 4 are correct done clear
B) 3 and 4 are correct done clear
C) 3 alone is correct done clear
D) 2 is alone is correct done clear
View Solution play_arrowA) \[\frac{2}{3}\] of the passenger's weight done clear
B) \[\frac{3}{4}\] of the passenger's weight done clear
C) Passenger's weight done clear
D) \[\frac{4}{3}\] of the passenger's weight done clear
View Solution play_arrowA) Total lift, total angle of lift, minimum radius of cam and cam speed done clear
B) Radius of circular arc cam, speed, location of centre of circular arc and roller diameter done clear
C) Weight of cam follower linkage, spring stiffness and cam speed done clear
D) Total lift, centre of gravity of the cam and cam speed done clear
View Solution play_arrowquestion_answer20) The Klain's method of construction for reciprocating engine mechanism:
A) Is a simplified version of instantaneous centre method done clear
B) Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine done clear
C) Enables determination of Corioli's component done clear
D) Is based on the acceleration diagram done clear
View Solution play_arrowA) \[\frac{{{I}_{1}}{{I}_{2}}{{({{\omega }_{1}}-{{\omega }_{2}})}^{2}}}{2({{I}_{1}}+{{I}_{2}})}\] done clear
B) \[\frac{{{I}_{1}}{{I}_{2}}{{(\omega _{1}^{2}-\omega _{2}^{2})}^{2}}}{2({{I}_{1}}+{{I}_{2}})}\] done clear
C) \[\frac{2{{I}_{1}}{{I}_{2}}{{({{\omega }_{1}}-{{\omega }_{2}})}^{2}}}{({{I}_{1}}+{{I}_{2}})}\] done clear
D) \[\frac{{{I}_{1}}\omega _{1}^{2}-{{I}_{2}}\omega _{2}^{2}}{({{I}_{1}}+{{I}_{2}})}\] done clear
View Solution play_arrowquestion_answer22) A spring controlled governor is found unstable. It can be made stable by:
A) Increasing the spring stiffness done clear
B) Decreasing the spring stiffness done clear
C) Increasing the ball weight done clear
D) Decreasing the ball weight done clear
View Solution play_arrowA) The resultant force at the fixed point must be Zero done clear
B) The resultant couple on the body must be zero done clear
C) Both resultant force and couple must be zero done clear
D) None of the above need be zero done clear
View Solution play_arrowA) Remain same as before done clear
B) Become equal to 2R done clear
C) Become equal to \[\frac{1}{2}R\] done clear
D) Become equal to \[\frac{1}{4}R\] done clear
View Solution play_arrow1. All harmonic farces, except those which are multiples of half the number of cylinders, are balanced. |
2. Couples are balanced if the engine is symmetrical about a plane normal to the axis of the cranks shaft. |
3. In a four cylinder in-line engine, second and fourth harmonic forces are unbalanced whereas in a six cylinder in-line engine, second fourth and sixth harmonic forces are unbalanced. |
A) 1, 2 and 3 are correct done clear
B) 1 and 3 are correct done clear
C) 1 and 2 are correct done clear
D) 2 and 3 are correct done clear
View Solution play_arrowquestion_answer26) Consider the following statements regarding the differential of an automobile:
1. The speed of the crown wheel will always be the mean of the speeds of the two road wheels. |
2. The road wheel speeds are independent of the number of teeth on the planets. |
3. The difference between the speed of the road wheels depends on the number of teeth on the planets. |
4. The ratio of speeds of the road wheels depends upon the number of teeth on the gear wheels attached to them and on the crown wheel. |
A) 1 and 2 are correct done clear
B) 3 and 4 are correct done clear
C) 1 and 3 are correct done clear
D) 2 and 4 are correct done clear
View Solution play_arrowA) The centre of the disc done clear
B) An infinite distance on the plane surface done clear
C) The point of contact done clear
D) The point on the circumference situated vertically opposite to the contact point done clear
View Solution play_arrowquestion_answer28) Consider the following statements:
1. Round bar in a round hole forms a turning pair. |
2. A square bar in a square hole forms a sliding pair. |
3. A vertical shaft in a foot-step bearing forms successful constraint. |
A) 1 and 3 done clear
B) 1 and 2 done clear
C) 2 and 3 done clear
D) 1, 2 and 3 done clear
View Solution play_arrowA) \[F=ar-b\] done clear
B) \[F=ar+b\] done clear
C) \[F=ar\] done clear
D) \[F=\text{a/r}+b\] done clear
View Solution play_arrowquestion_answer30) Which one of the following is an Open Pair?
A) Ball and socket joint done clear
B) Journal bearing done clear
C) Lead screw and nut done clear
D) Cam and follower done clear
View Solution play_arrowquestion_answer31) In a 4-stroke I.C engine, the turning moment during the compression stroke is:
A) Positive throughout done clear
B) Negative throughout done clear
C) Positive during major portion of the stroke done clear
D) Negative during major portion of the stroke done clear
View Solution play_arrowList-I | List-II | ||
A. | Automobile differential | 1. | Flat belt |
B. | Bicycle | 2. | belt |
C. | Planning machine | 3. | Chain drive |
D. | Radiator fan of automobile motion | 4. | Gear drive |
A) A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
C) A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]3 done clear
D) A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
View Solution play_arrow1. Friction moment is independent of the number of collars. |
2. The intensity of pressure is affected by the number of collars. |
3. Coefficient of friction of the bearing surface is affected by the number of collars. |
A) 1 and 2 done clear
B) 1 and 3 done clear
C) 2 and 3 done clear
D) 1, 2 and 3 done clear
View Solution play_arrowquestion_answer34) The centre of gravity of the coupler link in a 4-bar mechanism would experience:
A) No acceleration done clear
B) Only linear acceleration done clear
C) Only angular acceleration done clear
D) Both linear and angular accelerations done clear
View Solution play_arrow1. The friction force is dependent on the velocity of sliding. |
2. The friction force is directly proportional to the normal force. |
3. The friction force is dependent on the materials of the contact surfaces. |
4. The friction force is dependent on the area of contact surfaces. |
A) 2, 3 and 4 done clear
B) 1 and 3 done clear
C) 2 and 4 done clear
D) 1, 2, 3 and 4 done clear
View Solution play_arrowquestion_answer36) Which of the following statements are correct?
1. For constant velocity ratio transmission between two gears, the common normal at the point of contact must always pass through a fixed point on the line joining the centres of rotation of the gears. |
2. For involute gears the pressure angle changes with change in centre distance between gears. |
3. The velocity ratio of compound gear train depends upon the number of teeth of the input and output gears only. |
4. Epicyclic gear trains involve rotation of at least one gear axis about some other gear axis. |
A) 1, 2 and 3 done clear
B) 1 and 3 done clear
C) 1, 2 and 4 done clear
D) 2, 3 and 4 done clear
View Solution play_arrowList-I | List-II | ||
A. | Hunting | 1. | One radius of rotation for each speed. |
B. | Isochronism | 2. | Too sensitive |
C. | Stability | 3. | Mean force exerted at the sleeve during change of speed |
D. | Effort | 4. | Constant equilibrium speed for various radii of rotation |
A) A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 done clear
B) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]3 done clear
C) A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3 done clear
D) A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 done clear
View Solution play_arrowA) Force is equal to zero done clear
B) Couple is equal to zero done clear
C) Force and the resultant couple are both equal to zero done clear
D) Force is numerically equal to the resultant couple, but neither of them need necessarily be zero done clear
View Solution play_arrowA) \[\frac{2}{4}\] done clear
B) 3 done clear
C) 4 done clear
D) 5 done clear
View Solution play_arrowA) Tip of the gear tooth and flank of pinion done clear
B) Tip of the pinion and flank of gear done clear
C) Flanks of both gear and pinion done clear
D) Tips of both gear and pinion done clear
View Solution play_arrowquestion_answer41) Given \[\theta =\] angle through which the axis of the outer forward wheel turns
\[\phi =\]Angle through which the axis of the inner forward wheel turns |
a = distance between the pivots of front axle and |
b = wheel base |
A) \[\cos \theta -\cos \phi =\frac{a}{b}\] done clear
B) \[\cot \theta -\cot \phi =\frac{a}{b}\] done clear
C) \[\cos \theta +\cos \phi =\frac{a}{b}\] done clear
D) \[tan\theta +tan\phi =\frac{b}{a}\] done clear
View Solution play_arrowA) Zero done clear
B) A minimum but not equal to zero done clear
C) A maximum done clear
D) Not determinable unless the length of the pendulum and the mass of the bob are known done clear
View Solution play_arrowA) Crank and slotted lever quick return mechanism done clear
B) slider-crank mechanism done clear
C) four-bar mechanism done clear
D) Pantograph done clear
View Solution play_arrowquestion_answer44) What is the correct sequence of the following steps in engine analysis?
1. Vibration analysis |
2. Inertia force analysis |
3. Balancing analysis |
4. Velocity and Acceleration analysis |
A) 2, 4, 1, 3 done clear
B) 2, 4, 3, 1 done clear
C) 4, 2, 1, 3 done clear
D) 4, 2, 3, 1 done clear
View Solution play_arrowA) \[\frac{\mu }{\sin \alpha }\] done clear
B) \[\frac{\mu }{\cos \alpha }\] done clear
C) \[\mu \sin \alpha \] done clear
D) \[\mu \cos \alpha \] done clear
View Solution play_arrowList-I | List-II | ||
A. | Parallel shafts with slight offset | 1. | Hooke's joint |
B. | Parallel shafts at a reasonable distance | 2. | Worm and wheel |
C. | Perpendicular shafts | 3. | Oldham coupling |
D. | Intersecting shafts | 4. | Belt and pulley |
A) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
C) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
D) A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
View Solution play_arrowList-I | List-II | ||
A. | Quadric cycle chain | 1. | Rapson's slide |
B. | Single slider crank chain | 2. | Oscillating cylinder engine mechanism |
C. | Double slider crank chain | 3. | Ackermann steering mechanism |
D. | Crossed slider crank chain | 4. | Oldham coupling |
A) A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
C) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
D) A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
View Solution play_arrowList-I | List-II | ||
A. | Flywheel | 1. | Dunkerley Method |
B. | Flywheel | 2. | Turning Moment |
C. | Governor | 3. | d' Alembert's Principle |
D. | Inertia Force | 4. | Speed control on bar with load |
A) A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 done clear
B) A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]3 done clear
C) A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 done clear
D) A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 done clear
View Solution play_arrowquestion_answer49) The sensitivity of an isochronous governor is:
A) Zero done clear
B) one done clear
C) Two done clear
D) infinity done clear
View Solution play_arrowA) \[30{}^\circ \]anticlockwise done clear
B) \[60{}^\circ \]anticlockwise done clear
C) \[30{}^\circ \]clockwise done clear
D) \[60{}^\circ \]clockwise done clear
View Solution play_arrowquestion_answer51) A reverted gear train is one in which the output shaft
A) Rotate in opposite directions done clear
B) Are co-axial done clear
C) Are at right angles to each other done clear
D) Are at an angle to each other done clear
View Solution play_arrowquestion_answer52) In the case of an involute toothed gear, involute starts
A) Addendum circle done clear
B) dedundum circle done clear
C) Pitch circle done clear
D) base circle done clear
View Solution play_arrowA) \[{{I}_{a}}{{\alpha }_{a}}+{{G}^{2}}{{I}_{b}}\frac{{{\alpha }_{a}}}{\eta }\] done clear
B) \[{{G}^{2}}{{I}_{a}}\frac{{{\alpha }_{b}}}{\eta }\] done clear
C) \[{{G}^{2}}{{I}_{a}}\frac{{{\alpha }_{a}}}{\eta }\] done clear
D) \[{{G}^{2}}{{I}_{b}}\frac{{{\alpha }_{b}}}{\eta }\] done clear
View Solution play_arrowquestion_answer54) ..Which of the following pair (s) is/are correctly matched?
I. Four-bar chain ....Oscillating-oscillating converter |
II. Inertia governor ...Rate of change of engine speed |
III. Hammer blow ?Reciprocating unbalance |
A) I alone done clear
B) I, II and III done clear
C) II and III done clear
D) I and III done clear
View Solution play_arrowConsider the following statements in this regard: |
1. The motion has a frequency of oscillation (i.e. pitching) of 3 cycles/minute. |
2. The motion has an angular frequency of 3.14 rad/s |
3. The angular velocity of precession of ship?s rotor is \[\frac{\pi }{300}\] rad/s |
4. The amplitude of pitching is \[\frac{\pi }{30}\] rad |
A) 1 and 2 done clear
B) 1, 2 and 4 done clear
C) 2, 3 and 4 done clear
D) 1, 3 and 4 done clear
View Solution play_arrowMechanism | Chain from which derived | |
1. | Whitworth quick return motion | Single slider crank chain |
2. | Oldham's coupling | Four-bar chain |
3. | Scotch Yoke | Double slider crank chain |
A) 1 and 2 done clear
B) 1, 2 and 3 done clear
C) 1 and 3 done clear
D) 2 and 3 done clear
View Solution play_arrowA) \[180{}^\circ \]and \[90{}^\circ \] done clear
B) \[90{}^\circ \]and\[180{}^\circ \] done clear
C) \[0{}^\circ \]and \[90{}^\circ \] done clear
D) \[90{}^\circ \]and\[0{}^\circ \] done clear
View Solution play_arrowA) \[\sqrt{2v\omega }\] done clear
B) \[v\omega \] done clear
C) \[\frac{v\omega }{2}\] done clear
D) \[2v\omega \] done clear
View Solution play_arrowA) \[\frac{n}{2}\] done clear
B) \[n\] done clear
C) \[\frac{n-1}{2}\] done clear
D) \[\frac{n(n-1)}{2}\] done clear
View Solution play_arrowA) \[{{\omega }_{1}}.{{\omega }_{2}}.r\] done clear
B) \[({{\omega }_{1}}-{{\omega }_{2}})r\] done clear
C) \[({{\omega }_{1}}+{{\omega }_{2}})r\] done clear
D) \[({{\omega }_{1}}+{{\omega }_{2}})2r\] done clear
View Solution play_arrowquestion_answer61) In a cam drive, it is essential to offset the axis of a follower to:
A) Decrease the side thrust between the follower and guide done clear
B) Decrease the wear between follower and cam surface done clear
C) Take care of space limitation done clear
D) Reduce the cost done clear
View Solution play_arrowquestion_answer62) The working surface above the pitch surface of the gear tooth is termed as:
A) Addendum done clear
B) Dedendum done clear
C) Flank done clear
D) Face done clear
View Solution play_arrowquestion_answer63) In the case of a flywheel, the maximum fluctuation of energy is the:
A) Sum of maximum and minimum energies done clear
B) Difference between the maximum and minimum energies done clear
C) Ratio of the maximum and minimum energy done clear
D) Ratio of the minimum and maximum energy done clear
View Solution play_arrowList-I | List-II | ||
A. | Compound train | 1. | Hart mechanism |
B. | Quick return mechanism | 2. | Coriolis force |
C. | Exact straight line motion | 3. | Transmission of motion around bends and comers |
D. | Approximate straight line motion | 4. | Watt mechanism |
A) A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 done clear
B) A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
C) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
D) A\[\to \]1, B\[\to \]4, C\[\to \]3, D\[\to \]2 done clear
View Solution play_arrowm = mass of the ball of the governor, |
\[\omega \,\,=\] angular velocity of the governor and |
g = accelerate due to gravity, |
A) \[\frac{g}{2{{\omega }^{2}}}\] done clear
B) \[\frac{g}{{{\omega }^{2}}}\] done clear
C) \[\frac{\sqrt{2g}}{{{\omega }^{2}}}\] done clear
D) \[\frac{g}{{{\omega }^{2}}}\] done clear
View Solution play_arrowList-I | List-II | ||
A. | End thrust | 1. | Plain bearing |
B. | No cage | 2. | Ball bearing |
C. | More accurate centering | 3. | Needle bearing |
D. | Can be overloade | 4. | Tapered roller bearing |
A) A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
C) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
D) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
View Solution play_arrowA) Hunting done clear
B) Isochronous done clear
C) Sensitive done clear
D) Stable done clear
View Solution play_arrowA) Uniform firing order is obtained done clear
B) The couples are balanced done clear
C) Primary forces are balanced done clear
D) Secondary forces arc balanced done clear
View Solution play_arrowList-I | List-II | ||
A. | 4 links, 4 turning pair | 1. | Complete constraint |
B. | 3 links, 3 turning pair | 2. | Successful constraint |
C. | 5 links, 5 turning pair | 3. | Rigid Frame |
D. | Footstep bearing | 4. | Incomplete constant |
A) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 done clear
C) A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 done clear
D) A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
View Solution play_arrowA) Threecentres in line theorem done clear
B) Instantaneous centre of rotation method done clear
C) Coriolis component of acceleration method done clear
D) Klein's construction done clear
View Solution play_arrowquestion_answer71) Which one of the following pairs is correctly matched?
A) Governors....Interference done clear
B) Gears....Hunting done clear
C) Klein's construction....Acceleration at piston done clear
D) Cam....Pinion done clear
View Solution play_arrowA) \[m{{\omega }^{2}}r\sin \theta \] done clear
B) \[m{{\omega }^{2}}r\cos \theta \] done clear
C) \[m{{\omega }^{2}}r\frac{\sin 2\theta }{n}\] done clear
D) \[m{{\omega }^{2}}r\frac{\cos 2\theta }{n}\] done clear
View Solution play_arrowquestion_answer73) Consider the following statements:
A pinion of \[14\frac{1{}^\circ }{2}\] pressure angle and 48 involute teeth has a pitch circle diameter of 28.8 cm. It has |
1. Module of 6 mm |
2. Circular pitch of 18 nun |
3. Addendum of 6 mm |
4. Diametral pitch of \[\frac{11}{113}\] |
A) 2 and 3 done clear
B) 1 and 3 done clear
C) 1 and 4 done clear
D) 2 and 4 done clear
View Solution play_arrowA) Such that the follower motion is simple harmonic done clear
B) Such that the follower motion has a constant velocity from start to end done clear
C) A straight line, it being a tangent cam done clear
D) Such that the follower velocity increases linearly for half the rise portion and then decreases linearly for the remaining half of the rise portion done clear
View Solution play_arrow1. They will transmit the desired motion. |
2. They are difficult to manufacture. |
3. Standardization is not possible. |
4. The cost of production is low. |
A) 1, 2 and 3 done clear
B) 1, 2 and 4 done clear
C) 2, 3 and 4 done clear
D) 1, 3 and 4 done clear
View Solution play_arrowquestion_answer76) The motion transmitted between the teeth of two spur gears in mesh is generally:
A) Sliding done clear
B) Rolling done clear
C) Rotary done clear
D) Partly sliding and partly rolling done clear
View Solution play_arrowA) Hand pump done clear
B) Rolling done clear
C) Quick return done clear
D) Oscillating cylinder done clear
View Solution play_arrowquestion_answer78) Consider the following parameters:
1. Limit of peripheral speed |
2. Limit of centrifugal stress |
3. Coefficient of fluctuation of speed |
4. Weight of the rim |
A) 1, 3 and 4 done clear
B) 2, 3 and 4 done clear
C) 1, 2 and 3 done clear
D) 1, 2 and 4 done clear
View Solution play_arrowquestion_answer79) Consider the following speed governors:
1. Porter governor |
2. Hartnell governor |
3. Watt governor |
4. Proell governor. |
A) 1, 3, 2, 4 done clear
B) 3, 1, 4, 2 done clear
C) 3, 1, 2, 4 done clear
D) 1, 3, 4, 2 done clear
View Solution play_arrowA) Sum of the two masses must be equal to that of the rigid body done clear
B) Polar moment of inertia of the system should be equal to that of the rigid body done clear
C) Centre of gravity (e.g.) of the system should coincide with that of the rigid body done clear
D) Total moment of inertia about the axis through e.g. must be equal to that of the rigid body done clear
View Solution play_arrowquestion_answer81) A rigid shaft when laid on horizontal parallel ways will not roll if the:
A) Centre of gravity falls parallel to shaft axis done clear
B) Centre of gravity lies on the shaft axis done clear
C) Horizontal moments are large done clear
D) Vertical moments are large done clear
View Solution play_arrowquestion_answer82) If the ratio of the length of connecting rod to the crank radius increases, then:
A) Primary unbalanced forces will increase done clear
B) Primary unbalanced forces-will decrease done clear
C) Secondary unbalanced forces will increase done clear
D) Secondary unbalanced forces will decrease done clear
View Solution play_arrowList-I | List-II | ||
A. | Quick return mechanism | 1. | Lathe |
B. | Apron mechanism | 2. | Milling machine |
C. | Indexing mechanism | 3. | Shaper |
D. | Regulating wheel | 4. | Centre less grinding |
A) A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
B) A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
C) A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 done clear
D) A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 done clear
View Solution play_arrowquestion_answer84) A point on a link connecting a double slider crank chain-will trace a:
A) Straight line done clear
B) circle done clear
C) Parabola done clear
D) ellipse done clear
View Solution play_arrowA) Varies between \[3\frac{v}{2}\] and \[-\frac{v}{2}\] done clear
B) Varies between \[\frac{v}{2}\] and \[-\frac{v}{2}\] done clear
C) Varies between 3 \[3\frac{v}{2}\] and \[-\frac{v}{2}\] done clear
D) Does not vary and is equal to v done clear
View Solution play_arrowquestion_answer86) A four-bar chain has:
A) All turning pairs done clear
B) One turning pair and the others are sliding pairs done clear
C) One sliding pair and the others are turning pairs done clear
D) All sliding pairs done clear
View Solution play_arrowquestion_answer87) Sensitiveness of a governor is denned as:
A) \[\frac{Ranjge\,\,of\,\,speed}{2\times Mean\,\,speed}\] done clear
B) \[\frac{2\times Mean\,\,speed}{Ranjge\,\,of\,\,speed}\] done clear
C) \[Mean\,\,speed\times Ranjge\,\,of\,\,speed\] done clear
D) \[\frac{Ranjge\,\,of\,\,speed}{Mean\,\,speed}\] done clear
View Solution play_arrowquestion_answer88) The velocity ratio in the case of the compound train of wheels is equal to:
A) \[\frac{No\,\,of\,\,teeth\,\,on\,\,first\,\,drivers}{No\,\,of\,\,teeth\,\,on\,\,last\,\,follower}\] done clear
B) \[\frac{No\,\,of\,\,teeth\,\,on\,\,last\,\,follower}{No\,\,of\,\,teeth\,\,on\,\,first\,\,drivers}\] done clear
C) \[\frac{\text{Produc}t\,\,of\,\,teeth\,\,on\,\,the\,\,drivers}{\text{Product}\,\,of\,\,teeth\,\,on\,\,the\,\,follower}\] done clear
D) \[\frac{\text{Produc}t\,\,of\,\,teeth\,\,on\,\,the\,\,follower}{\text{Product}\,\,of\,\,teeth\,\,on\,\,the\,\,drivers}\] done clear
View Solution play_arrowquestion_answer89) Consider the following pairs of parts:
1. Pair of gear in mesh |
2. Belt and pulley |
3. Cylinder and piston. |
4. Cam and follower |
A) 1 and 4 done clear
B) 2 and 4 done clear
C) 1, 2 and 3 done clear
D) 1, 2 and 4 done clear
View Solution play_arrowquestion_answer90) A Kaplan turbine is a:
A) Outward flow reaction turbine done clear
B) Inward flow impulse turbine done clear
C) Low head axial flow turbine done clear
D) High head mixed flow turbine done clear
View Solution play_arrowquestion_answer91) Which of the following hydraulic turbines are reaction turbines?
1. Francis |
2. Kaplan |
3. Propeller |
A) 1, 2 and 3 done clear
B) 1 and 2 only done clear
C) 2 and 3 only done clear
D) 1 and 3 only done clear
View Solution play_arrowA) Boiler furnace. Economizer, Air preheater, Superheater and Chimney done clear
B) Boiler furnace, Superheater, Air preheater, Economizer and Chimney done clear
C) Boiler furnace. Air preheater, Superheater, Economizer and Chimney done clear
D) Boiler furnace. Superheater, Economizer, Air preheater and Chimney done clear
View Solution play_arrowquestion_answer93) Clapeyron's equation is used for finding out the:
A) 'Dryness fraction of steam only done clear
B) Entropy of superheated vapour only done clear
C) Specific volume at any temperature and pressure. done clear
D) Total heat of superheated steam only done clear
View Solution play_arrowquestion_answer94) In a locomotive boiler, the draught is produced by:
A) Chimney done clear
B) ID fan done clear
C) FD fan done clear
D) Steam jet done clear
View Solution play_arrowA) Hydrogen done clear
B) Ammonia done clear
C) Silica done clear
D) Dissolved salts done clear
View Solution play_arrowquestion_answer96) Willans line represents:
A) Total steam consumption vs. power output with throttle governing done clear
B) Total steam consumption vs. power output with cutoff governing done clear
C) (e) Behaviour of supersaturated steam through nozzles done clear
D) Condensation of steam while flowing through the turbine done clear
View Solution play_arrow1. The convergent part acts as a nozzle. |
2. The divergent part acts as a diffuser. |
3. The maximum limiting speed of the fluid is the sonic velocity. |
A) 1, 2 and 3 done clear
B) 1 and 2 only done clear
C) 2 and 3 only done clear
D) 1 and 3 only done clear
View Solution play_arrowA) Decrease done clear
B) Increase done clear
C) Remain unaffected done clear
D) Come to a dead stop due to shock waves done clear
View Solution play_arrowquestion_answer99) State of a wet vapour cannot be specified only by:
A) Pressure and temperature done clear
B) Pressure and dryness fraction done clear
C) Temperature and dryness fraction done clear
D) Pressure and volume done clear
View Solution play_arrowquestion_answer100) Pertaining to a steam boiler, which of the following statements is correct?
A) Primary boiler heat transfer surface Includes evaporator section, economizer and air preheater done clear
B) Primary boiler heat transfer surface includes evaporator section, economizer and superheater section done clear
C) Secondary boiler heat transfer surface includes superheater, economizer and air preheater done clear
D) Primary boiler heat transfer surface includes evaporator section, superheater section and reheat section done clear
View Solution play_arrowA) It decreases with increase in ambient temperature done clear
B) It increases with decrease in pressure ratio done clear
C) It increases with decrease in clearance ratio done clear
D) It decreases with increase in delivery pressure done clear
View Solution play_arrowA) Isothermal process done clear
B) Adiabatic process done clear
C) Polytropic process done clear
D) Constant pressure process done clear
View Solution play_arrowquestion_answer103) In an axial flow compressor, stalling is the phenomenon of:
A) Air motion at some velocity done clear
B) Air stream blocking the passage done clear
C) Reversed flow of air done clear
D) Air stream not following the blade contour done clear
View Solution play_arrowquestion_answer104) In Rayleigh flow at subsonic Mach numbers, heat addition:
A) Decreases static pressure done clear
B) Decreases enthalpy done clear
C) Increases static pressure done clear
D) Decreases static temperature done clear
View Solution play_arrowquestion_answer105) The function of economizer in a boiler is to:
A) Superheat the steam done clear
B) Reduce fuel consumption done clear
C) Increase steam pressure done clear
D) Maintain saturation temperature done clear
View Solution play_arrowquestion_answer106) In which modification of simple gas turbine cycle, is work ratio increased?
1. Regenerative gas turbine cycle |
2. Gas turbine cycle with reheating |
A) Both 1 and 2 done clear
B) 1 only done clear
C) 2 only done clear
D) Neither 1 only 2 done clear
View Solution play_arrowquestion_answer107) Reheat between multi-stage expansions Joule cycle increases
1. Overall work output |
2. The work ratio |
3. The thermal efficiency |
A) 1, 2 and 3 done clear
B) 1 and 2 only done clear
C) 2 and 3 only done clear
D) 1 and 3 only done clear
View Solution play_arrowquestion_answer108) For a given discharge in a channel at critical depth:
A) The specific energy is minimum done clear
B) The specific energy is maximum done clear
C) The total energy is minimum done clear
D) The total energy is maximum done clear
View Solution play_arrowA) Will be higher in case of pipe with relative roughness of 0001 done clear
B) Will be higher in case of pipe with relative ness of 0.002 done clear
C) Will be same in both pipes done clear
D) In the two pipes cannot be compared on the basis of data given done clear
View Solution play_arrowquestion_answer110) Weber number is ratio of square root of inertia force to:
A) Surface force done clear
B) Gravity force done clear
C) Pressure force done clear
D) Viscous force done clear
View Solution play_arrowquestion_answer111) What is the correct statement regarding normal shock wave in a gas?
A) Normal shock is reversible done clear
B) The downstream flow as well as upstream flow is supersonic done clear
C) The entropy increases across the shock done clear
D) The entropy remains constant done clear
View Solution play_arrowquestion_answer112) Across a normal shock:
A) The pressure and temperature rise done clear
B) The density and temperature decrease done clear
C) The velocity and pressure increase done clear
D) The velocity and pressure decrease done clear
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