question_answer1) Cavitation damage in the turbine runner occurs near the:
A) inlet on the concave side of the blades done clear
B) Outlet on the concave side of the blades done clear
C) Outlet on the convex side of the blades done clear
D) Inlet on the convex side of the blades done clear
View Solution play_arrowA) Draft tube done clear
B) turbine done clear
C) Tail race done clear
D) penstocks. done clear
View Solution play_arrowquestion_answer3) The function of the draft tube in a reaction turbine is:
A) To enable the shaft of the turbine to be vertical done clear
B) To transform a large part of pressure energy at turbine outlet into kinetic energy done clear
C) To avoid whirl losses at the exit of the turbine done clear
D) To transform a large part of kinetic energy at the turbine outlet into pressure energy. done clear
View Solution play_arrowquestion_answer4) consider the following characteristics:
1. The fluid enters the pump axially and is discharged radially. |
2. Maximum efficiency may be of the order of 90%. |
3. Development of a low head. |
4. A limited section capacity. |
A) 1 and 2 done clear
B) 2 and 3 done clear
C) 2 and 4 done clear
D) 3 and 4 done clear
View Solution play_arrowA) 2 k W done clear
B) 15.2 k W done clear
C) 19.6 k W done clear
D) 25.8 k W done clear
View Solution play_arrowList-I | List-II | ||
A. | Head race | 1. | Channel, tunnel or pipes through which water is carried from reservoir to the turbine |
B. | Tail race | 2. | Reservoir water level |
C. | Penstock | 3. | Diverging tube discharging water from the turbine to the atmosphere |
D. | Draft tube | 4. | The level at which water is discharged a atmospheric pressure |
A) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 done clear
B) A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 done clear
C) A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
D) A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 done clear
View Solution play_arrowquestion_answer7) Consider the following statements in respect of centrifugal pumps:
1. Head developed is proportional to the square of the speed of rotation. |
2. Backward curved bladed impellers arc generally used in centrifugal pumps. |
3. These pumps generally do not require priming. |
4. Multistage pumps would give higher discharge proportional to the number of stages. Which of these statements are correct? |
A) 1 and 2 done clear
B) 2 and 3 done clear
C) 3 and 4 done clear
D) 1 and 4 done clear
View Solution play_arrowA) \[{{\eta }_{0}}\,=\,{{h}_{mech}}\,\times \,{{\eta }_{hyd}}\] done clear
B) \[{{\eta }_{0}}\,=\,{{h}_{mech}}\,/\,{{\eta }_{hyd}}\] done clear
C) \[{{\eta }_{0}}\,=\,{{\eta }_{hyd}}\,/\,{{\eta }_{mech}}\] done clear
D) \[{{\eta }_{0}}\,=\,{{\eta }_{mech}}\,-\,{{\eta }_{hyd}}\] done clear
View Solution play_arrowA) \[\frac{N\sqrt{Q}}{{{H}^{3/4}}},\frac{N\sqrt{P}}{{{H}^{5/4}}}\] done clear
B) \[\frac{N\sqrt{P}}{{{H}^{3/4}}},\frac{N\sqrt{Q}}{{{H}^{5/4}}}\] done clear
C) \[\frac{N\sqrt{P}}{{{H}^{5/4}}},\frac{N\sqrt{Q}}{{{H}^{3/4}}}\] done clear
D) \[\frac{N\sqrt{P}}{{{H}^{7/4}}},\frac{N\sqrt{Q}}{{{H}^{3/4}}}\] done clear
View Solution play_arrowquestion_answer10) Consider the following statements:
In the thermoelectric refrigeration, the coefficient of performance is a function of: |
1. Electrical conductivity of materials. |
2. Peltier coefficient |
3. See beck coefficient |
4. Temperature at cold and hot functions |
5. Thermal conductivity of materials. |
A) 1, 3, 4 and 5 are correct done clear
B) 1, 2, 3 and 5 correct done clear
C) 1, 2, 4 and 5 correct done clear
D) 2, 3, 4 and 5 correct done clear
View Solution play_arrowA) The runner is axial done clear
B) The blades are wing type done clear
C) There are four to eight blades done clear
D) The blades can he adjusted. done clear
View Solution play_arrowA) Pelton turbine done clear
B) Kaplan turbine done clear
C) Dc Laval turbine done clear
D) Parson's turbine done clear
View Solution play_arrowquestion_answer13) Which one of the following is an example of a pure (100%) reaction machine?
A) Pelton wheel done clear
B) Francis turbine done clear
C) Modern gas turbine done clear
D) Lawn sprinkler done clear
View Solution play_arrowquestion_answer14) Consider the following statements:
1. A reverse jet protects Pelton turbine from over speeding. |
2. Runner blades of Francis turbine are adjustable. |
3. Draft tube is used invariably in all reaction turbine installations. |
4. Surge tank is a protective device on penstock. Of these statements: |
A) 1 and 2 are correct done clear
B) 2 and 3 are correct done clear
C) 3 and 4 are correct done clear
D) 1 and 4 are correct. done clear
View Solution play_arrowquestion_answer15) Unit power \[{{P}_{1}}\] is given by the expression:
A) \[{{P}_{1}}=\frac{p}{\sqrt{H}}\] done clear
B) \[{{P}_{1}}=\frac{p}{{{H}^{3/2}}}\] done clear
C) \[{{P}_{1}}=\frac{p}{{{H}^{3/4}}}\] done clear
D) \[{{P}_{1}}=\frac{p}{{{H}^{3/5}}}\] done clear
View Solution play_arrowA) \[{{N}_{s}}\] done clear
B) \[\sqrt{2}{{N}_{s}}\] done clear
C) \[\frac{{{N}_{s}}}{\sqrt{2}}{{N}_{s}}\] done clear
D) \[2{{N}_{s}}.\] done clear
View Solution play_arrowA) A function of the temperature and pressure of the solution done clear
B) A function of the pressure of the solution irrespective of the temperature done clear
C) A function of the temperature of the solution alone done clear
D) Independent of the temperature and pressure of the solution done clear
View Solution play_arrowA) \[\left( 1-\frac{\cos \phi }{2} \right)\] done clear
B) \[\left( \frac{1}{2}+\cos \phi \right)\] done clear
C) \[\left( \frac{1+\cos \phi }{2} \right)\] done clear
D) \[\left( \frac{1-\cos \phi }{2} \right)\] done clear
View Solution play_arrowquestion_answer19) The location of a surge tank in a high head hydraulic power plant would be:
A) Nearer to the dam done clear
B) At the powerhouse done clear
C) Nearest to the powerhouse done clear
D) Immaterial done clear
View Solution play_arrowList-I (Water Turbines) | List-II (Application) | ||
A. | Pelton | 1. | High head and low discharge |
B. | Francis | 2. | High head and high discharge |
C. | Kaplan | 3. | Medium head and medium discharge |
4. | Low head and high discharge |
A) A\[\to \]1, B\[\to \]3, C\[\to \]2 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]4 done clear
C) A\[\to \]2, B\[\to \]4, C\[\to \]3 done clear
D) A\[\to \]3, B\[\to \]2, C\[\to \]4 done clear
View Solution play_arrowquestion_answer21) Which one of the following helps in avoiding cavitation in centrifugal pumps?
A) Low suction pressure done clear
B) High delivery pressure done clear
C) Low delivery pressure done clear
D) High suction pressure done clear
View Solution play_arrow1. High specific speed implies that it is a Pelton wheel |
2. Medium specific speed implies that it is an axial flow turbine |
3. Low specific speed implies that it is a Francis turbine |
4. Which of these statements given above is/are correct? |
A) 1 only done clear
B) 2 only done clear
C) 3 only done clear
D) None done clear
View Solution play_arrowA) It acts as a temporary storage during load changes, done clear
B) It prevents hydraulic jump done clear
C) It prevents surges at the transformer done clear
D) It prevents water hammer due to sudden reduction in load. done clear
View Solution play_arrowList-I (Type of Turbine) | List-II (Specific Speed) | ||
A. | Pelton | 1. | 0.1 |
B. | Francis | 2. | 3.0 |
C. | Propeller | 3. | 4.0 |
D. | Kaplan | 5. | 1.0 |
A) A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
B) A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
C) A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
D) A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
View Solution play_arrowquestion_answer25) Consider the following statements: In hydraulic power plants
1. Pelton turbines are used for high heads. |
2. Kaplan turbines are used for medium heads. |
3. Francis turbines are used for low heads. Which of the above statements is/are correct? |
A) 1 only done clear
B) 2 only done clear
C) 3 only done clear
D) 1, 2 and 3 done clear
View Solution play_arrowquestion_answer26) The speed ratio for Pelton wheel varies from:
A) \[0.45\,-\,0.50\] done clear
B) \[0.6\,-\,0.7\] done clear
C) \[0.30\,-\,0.40\] done clear
D) \[0.8\,-\,0.9\] done clear
View Solution play_arrowList-I | List-II | ||
A. | Specific speed of pump | 1. | \[\left( \frac{N\sqrt{Q}}{{{H}^{3/4}}} \right)\] |
B. | Low specific speed of turbine. | 2. | Screw pump |
C. | Pumping viscous oil | 3. | Reaction turbine |
D. | Draft tube | 4. | Turbine Pump |
5. | Very high specific speed | ||
6. | \[\left( \frac{N\sqrt{P}}{{{H}^{5/4}}} \right)\] | ||
7. | Impulse turbine |
A) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]5 done clear
B) A\[\to \]6, B\[\to \]7, C\[\to \]4, D\[\to \]3 done clear
C) A\[\to \]1, B\[\to \]7, C\[\to \]2, D\[\to \]3 done clear
D) A\[\to \]6, B\[\to \]3, C\[\to \]4, D\[\to \]5 done clear
View Solution play_arrowList-I | List-II | ||
A. | Draft tube | 1. | Impulse turbine |
B. | Surging | 2. | Reciprocating pump |
C. | Air Vessel | 3. | Reaction turbine |
D. | Nozzle | 4. | Centrifugal pump |
A) A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
B) A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 done clear
C) A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
D) A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
View Solution play_arrowA) 41.4 m done clear
B) 29.6 m done clear
C) 20 m done clear
D) 9.5 m done clear
View Solution play_arrowA) The relation is valid for both impulse as well as reaction turbines done clear
B) The value of specific speed depends on the system of units done clear
C) The value of specific speed for pelton wheel will be lower than that for Kaplan turbine for any system of units done clear
D) The dimensions of specific speed are: \[(FLT{{\,}^{-\,1}})\] done clear
View Solution play_arrowquestion_answer31) Air vessel is used in a reciprocating pump to obtain:
A) Reduction of suction head done clear
B) Rise in delivery head done clear
C) Continuous supply of water at uniform rate done clear
D) Increase in supply of water done clear
View Solution play_arrowquestion_answer32) Hydraulic transmission through fluid coupling is suitable for:
A) Unsteady operation and increasing torque done clear
B) Unsteady operation and increasing speed done clear
C) Unsteady operation and low starting torque done clear
D) Increasing torque and low starting load done clear
View Solution play_arrowquestion_answer33) Match the following:
List-I | List-II | ||
A. | Wicket gates | 1. | Gradually converts the velocity head to pressure head |
B. | Volute tube | 2. | Pressure head recovery |
C. | Draft tube | 3. | High value of N and N |
D. | Axial flow | 4. | Adjustable by governor pumps according to head |
A) A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 done clear
C) A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
D) A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 done clear
View Solution play_arrowquestion_answer34) Chances of occurrence of cavitation are high if the:
A) Local pressure becomes very high done clear
B) Local temperature becomes low done clear
C) Thoma cavitation parameter exceeds a certain limit done clear
D) Local pressure falls below the vapour pressure. done clear
View Solution play_arrowA) Delivering unit quantity of water done clear
B) Consuming unit power done clear
C) Having unit velocity of flow done clear
D) Having unit radial velocity done clear
View Solution play_arrowA) Decrease and increase done clear
B) Increase and increase done clear
C) Decrease and decrease done clear
D) Increase and decrease. done clear
View Solution play_arrowA) \[\frac{N\sqrt{Q}}{{{H}^{3/4}}}\] and \[\frac{N\sqrt{P}}{{{H}^{5/4}}}\] respectively done clear
B) \[\frac{N\sqrt{Q}}{{{H}^{3/4}}}\] and \[\frac{N\sqrt{P}}{{{H}^{3/4}}}\] respectively done clear
C) \[\frac{N\sqrt{Q}}{{{H}^{5/4}}}\] and \[\frac{N\sqrt{P}}{{{H}^{5/4}}}\] respectively done clear
D) \[\frac{N\sqrt{Q}}{{{H}^{5/4}}}\] and \[\frac{N\sqrt{P}}{{{H}^{3/4}}}\] respectively done clear
View Solution play_arrowList-I | List-II | ||
A. | Draft tube | 1. | Impulse turbine |
B. | Surging | 2. | Reciprocating pump |
C. | Air Vessel | 3. | Reaction turbine |
D. | Nozzle | 4. | Centrifugal pump |
A) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]3, B\[\to \]4, 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\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
View Solution play_arrowList-I (Tapes of turbines) | List-II (Characteristics of turbines) | ||
A. | Propeller | 1. | Inward flow reaction |
B. | Francis | 2. | Tangential flow impulse |
C. | Kaplan | 3. | Axial flow reaction with fixed vanes |
D. | Pelton | 4. | Axial flow reaction with adjustable vanes |
A) A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 done clear
B) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
C) A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3 done clear
D) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 done clear
View Solution play_arrow1. To collect water from the periphery of the impeller and to transmits it to the delivery pipe at a constant velocity. |
2. To increase the discharge of the pump. |
3. To increase the efficiency of the pump. |
4. To reduce the loss of head in discharge. |
A) 1, 2 and 3 done clear
B) 2, 3 and 4 done clear
C) 1, 3 and 4 done clear
D) 1 and 2 done clear
View Solution play_arrowquestion_answer41) The movable wicket gates of a reaction turbine are used to:
A) Control the flow of water passing through the turbine done clear
B) Control tile pressure under which the turbine is working. done clear
C) Strengthen the casing of the turbine. done clear
D) Reduce the size of the turbine. done clear
View Solution play_arrow1. Constant rate of discharge can be ensured |
2. Power consumption can be reduced |
3. Discharge can he increased |
4. Constant velocity of the piston can he ensured. |
A) 1 and 4 done clear
B) 1 and 2 done clear
C) 2 and 4 done clear
D) 1 and 3 done clear
View Solution play_arrowquestion_answer43) For attaining a non-overloading characteristic in centrifugal pumps:
A) Backward bent vanes are preferred over forward bent vanes. done clear
B) Forward bent vanes are preferred over backward bent vanes. done clear
C) Forward bent vanes are preferred over vanes radial at outlet. done clear
D) Vanes radial at outlet are preferred over backward vanes. done clear
View Solution play_arrowquestion_answer44) Consider the following statements:
Cavitation in hydraulic machines occurs at the |
1. Exit of a pump |
2. Entry of the pump |
3. Exit of a turbine |
A) 1 and 2 are correct done clear
B) 1 and 3 are correct done clear
C) 1, 2 and 3 are correct done clear
D) 2 and 3 are correct done clear
View Solution play_arrowquestion_answer45) Euler equation for water turbine is derived on the basis of:
A) conservation of mass done clear
B) Rate of change of linear momentum done clear
C) Rate of change of angular momentum done clear
D) Rate of change of velocity. done clear
View Solution play_arrowA) Delivers unit discharge at unit head. done clear
B) Delivers unit discharge at unit power. done clear
C) Delivers unit power at unit discharge. done clear
D) Produces unit power under the unit head. done clear
View Solution play_arrowquestion_answer47) Match List-I with List-II and select the correct answer.
List-I | List-II | ||
A. | Pelton wheel (single jet) | 1. | Medium discharge, low head |
B. | Francis Turbine | 2. | High discharge, low head |
C. | Kaplan Turbine | 3. | Medium discharge medium head |
4. | Low discharge high head |
A) A\[\to \]1, B\[\to \]2, C\[\to \]3 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]4 done clear
C) A\[\to \]4, B\[\to \]1, C\[\to \]3 done clear
D) A\[\to \]4, B\[\to \]3, C\[\to \]2 done clear
View Solution play_arrowquestion_answer48) Consider the following statement:
If pump NFSH requirements are not satisfied, then |
1. It will not develop sufficient head to raise water. |
2. Its efficiency will be low. |
3. It will deliver very low discharge. |
4. It will be cavitated. |
A) 1, 2 and 3 are correct done clear
B) 1 and 4 are correct done clear
C) 2, 3 and are 4 correct done clear
D) 1, 2, 3 and 4 are correct. done clear
View Solution play_arrowquestion_answer49) In reaction turbines, the draft tube is used:
A) For the safety of the turbine. done clear
B) To convert the kinetic energy of flow by a gradual expansion of the flow cross-section. done clear
C) To destroy the undesirable eddies. done clear
D) For none of the above purposes. done clear
View Solution play_arrowA) \[\frac{N\sqrt{P}}{{{H}^{4/5}}}\] done clear
B) \[\frac{N\sqrt{P}}{{{H}^{5/4}}}\] done clear
C) \[\frac{P\sqrt{N}}{{{H}^{4/5}}}\] done clear
D) \[\frac{P\sqrt{N}}{{{H}^{5/4}}}\] done clear
View Solution play_arrowA) More than atmospheric pressure to vacuum done clear
B) Less than atmospheric pressure to zero gauge pressure done clear
C) Atmospheric pressure to more than atmospheric pressure done clear
D) Atatmospheric pressure to vacuum. done clear
View Solution play_arrowquestion_answer52) Consider the following statements regarding torque converter:
1. It has a stationary set of blades in addition to the primary and secondary rotors. |
2. It can be used for multiplication of torques. |
3. The maximum efficiency of a inverter is less than that of a fluid coupling |
4. In a converter designed to give a large increase of torque, the efficiency........speed ratio approaches unity. |
A) 1, 2, 3 and 4 are correct done clear
B) 1, 2 and 3 are correct done clear
C) 1, 2 and 4 are correct done clear
D) 3 and 4 are correct done clear
View Solution play_arrowquestion_answer53) In contrast to fluid couplings, torque Converters are operated:
A) While completely filled with liquid done clear
B) While partially filled with liquid done clear
C) Without liquid done clear
D) While completely filled with air. done clear
View Solution play_arrowquestion_answer54) Which one of the following statements regarding an impulse turbine is correct?
A) There is no pressure variation in flow over the buckets and the fluid fills the passageway between the buckets done clear
B) There is no pressure variation in flow over the buckets and the fluid does not fill the passageway between the buckets done clear
C) There is pressure drop in flow over the buckets and the fluid fills the passageway between the buckets done clear
D) There is pressure drop in flow over the buckets and the fluid does not fill the passageway between the buckets. done clear
View Solution play_arrowquestion_answer55) A centrifugal pump is started with its delivery valve kept:
A) Fully open done clear
B) fully closed done clear
C) Partially open done clear
D) 50% open. done clear
View Solution play_arrowA) Straight cylindrical done clear
B) Conical type done clear
C) (e) Bell-mouthed done clear
D) Bent tube. done clear
View Solution play_arrowquestion_answer57) Which one of the following turbines is used in underwater power stations?
A) Pelton turbine done clear
B) Deriaz turbine done clear
C) Tubular turbine done clear
D) Turgo-impulse turbine. done clear
View Solution play_arrowquestion_answer58) A pelton wheel is ideally suited for:
A) High head and low discharge done clear
B) High head and high discharge done clear
C) Low head and low discharge done clear
D) Medium head and medium discharge done clear
View Solution play_arrowquestion_answer59) Consider the following turbines:
1. Kaplan |
2. Pelton wheel |
3. Francis |
A) 2, 3, 1 done clear
B) 2, 1, 3 done clear
C) 3, 1, 2 done clear
D) 1, 2, 3 done clear
View Solution play_arrow1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head. |
2. At the same specific speed, the efficiency is greater with larger capacity |
3. The specific speed increases with increase in outer blade angle |
4. The specific speed varies directly as the square root of the pump discharge. |
A) 1 and 2 are correct done clear
B) 2 and 4 are correct done clear
C) 3 and 4 are correct done clear
D) 2 and 3 are correct done clear
View Solution play_arrow1. Increase in the efficiency of the pump. |
2. Conversion of part of the pressure head to velocity head. |
3. Giving uniform flow of the fluid coming out of the impeller. |
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_answer62) Consider the following statements:
1. A draft tube may be fitted to the tail end of a Pelton head. |
2. Kaplan turbine is an axial flow reaction turbine with adjustable vanes on the |
3. Modem Francis turbine is a mixed flow reaction turbine. |
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_arrowA) 6.5 kW done clear
B) 8.7 kW done clear
C) 9.8 kW done clear
D) 10.9 kW done clear
View Solution play_arrowquestion_answer64) Consider the following pumps:
1. Centrifugal pump, single-stage |
2. Centrifugal pump, multi-stage |
3. Reciprocating pump |
4. Jet pump |
A) 2 alone done clear
B) 1, 3 and 4 done clear
C) 4 alone done clear
D) 1 and 3 done clear
View Solution play_arrowA) \[1-\frac{{{\omega }_{s}}}{{{\omega }_{p}}}\] done clear
B) \[\frac{{{\omega }_{s}}}{{{\omega }_{p}}}\] done clear
C) \[\frac{{{\omega }_{p}}}{{{\omega }_{s}}}\] done clear
D) \[1-\frac{{{\omega }_{p}}}{{{\omega }_{s}}}\] done clear
View Solution play_arrowquestion_answer66) Hydraulic ram is a pump which works on the principle of:
A) Water hammer done clear
B) Centrifugal action done clear
C) Reciprocating action done clear
D) Hydraulic press done clear
View Solution play_arrowA) Pelton wheel, Francis turbine, Kaplan turbine done clear
B) Propeller turbine, Francis turbine, Pelton wheel done clear
C) Kaplan turbine, Pelton wheel, Francis turbine done clear
D) Francis turbine, Kaplan turbine, Pelton wheel. done clear
View Solution play_arrowA) \[d\frac{N{{Q}^{1/2}}}{{{H}^{3/4}}}\] and \[\frac{N{{P}^{1/2}}}{{{H}^{5/4}}}\] done clear
B) \[\frac{N{{Q}^{1/2}}}{{{H}^{3/4}}}\] and \[\frac{N{{P}^{1/2}}}{{{H}^{3/4}}}\] done clear
C) \[\frac{N{{P}^{1/2}}}{{{H}^{5/4}}}\] and \[\frac{N{{Q}^{1/2}}}{{{H}^{5/4}}}\] done clear
D) \[\frac{N{{P}^{1/2}}}{{{H}^{3/4}}}\] and \[\frac{N{{Q}^{1/2}}}{{{H}^{5/4}}}\] done clear
View Solution play_arrowquestion_answer69) Consider the following turbines/wheels:
1. Francis turbine |
2. Pelton wheel with two or more jets |
3. Pelton wheel with a single jet |
4. Kaplan turbine. |
A) 2, 3, 1, 4 done clear
B) 3, 2, 1, 4 done clear
C) 2, 3, 4, 1 done clear
D) 3, 2, 4, 1 done clear
View Solution play_arrowA) 20 m done clear
B) 18 m done clear
C) 16.2 m done clear
D) 1.8 m done clear
View Solution play_arrowA) Latent heat of ammonia is higher than that of freon done clear
B) Thermal conductivity of water is higher than that of air done clear
C) Specific heat of water is higher than that of air done clear
D) Of the larger superheat from of ammonia compression cycle. done clear
View Solution play_arrow1. Loss of head due to change in velocity is eliminated. |
2. Efficiency of the pump is increased. |
3. Water from the periphery of the impeller is collected and transmitted to the delivery pipe at constant velocity. |
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_arrowA) Static pressure of fluid done clear
B) Dynamic pressure of fluid done clear
C) vapour pressure of fluid done clear
D) Shear stress of fluid. done clear
View Solution play_arrowquestion_answer74) Consider the following statements:
A water turbine governor |
1. Helps in starting and shutting down the turbo unit. |
2. Controls the speed of turbine set to match it with the hydroelectric system. |
3. Sets the amount of load which a turbine unit has to carry |
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_arrowquestion_answer75) Consider the following statements regarding a torque converter: '
1. Its maximum efficiency is less than that of the fluid coupling |
2. It has two runners and a set of stationary vanes interposed between them. |
3. It has two runners. |
4. The ratio of secondary to primary torque is zero for the zero value of angular velocity of secondary. |
A) 1 and 2 done clear
B) 3 and 4 done clear
C) 1 and 4 done clear
D) 2 and 4 done clear
View Solution play_arrowquestion_answer76) Consider the specific speed ranges of the following types of turbines:
1, Francis |
2. Kaplan |
3. Pelton |
A) 1, 2, 3 done clear
B) 3, 1, 2 done clear
C) 3, 2, 1 done clear
D) 2, 3, 1. done clear
View Solution play_arrowA) Zero done clear
B) 34% done clear
C) 50% done clear
D) 84% done clear
View Solution play_arrowA) 3 done clear
B) 4 done clear
C) 5 done clear
D) 6 done clear
View Solution play_arrowActivity | \[{{\mathbf{T}}_{\mathbf{e}}}\] (days) | V \[{{\left( \mathbf{days} \right)}^{\mathbf{2}}}\] |
a | 17 | 4 |
b | 15 | 4 |
c | 8 | 1 |
A) 15.6% done clear
B) 50.0% done clear
C) 81.4% done clear
D) 90.0% done clear
View Solution play_arrowA) 11 done clear
B) 13 done clear
C) 18 done clear
D) 27 done clear
View Solution play_arrowquestion_answer81) Consider the following statements:
Thermal stress is induced in a component in general, when |
1. A temperature gradient exists in the component. |
2. The component is free from any restraint. |
3. It is restrained to expand or contract freely. |
A) 1 and 2 done clear
B) 2 and 3 done clear
C) 3 alone done clear
D) 2 alone. done clear
View Solution play_arrowquestion_answer82) Consider the following statements in case of beams:
1. Rate of change of shear force is equal to the rate of loading at a particular section. |
2. Rate of change of bending moment is equal to the shear force at a particular section. |
3. Maximum shear force in a beam occurs at a point where bending moment is either zero or bending moment changes sign. |
A) 1 alone done clear
B) 2 alone done clear
C) 1 and 2 done clear
D) 1, 2 and 3. done clear
View Solution play_arrowquestion_answer83) Which of the following are fabricated using engineering plastics?
1. Surface plate |
2. Gears |
3. Guide ways for machine tools |
4. Foundary patterns. |
A) 1, 2 and 3 done clear
B) 1 done clear
C) 2, 3 and 4 done clear
D) 1, 2, 3 and 4. done clear
View Solution play_arrowquestion_answer84) Consider the following statements: Polytetrafluoro-ethane is
1. A thermoplastic material. |
2. Having high friction co-efficient. |
3. A thermosetting material. |
4. Having low friction co-efficient. |
5. An electric insulator. |
6. non-sticking to surfaces. |
A) 1, 2 and 5 done clear
B) 2, 3 and 6 done clear
C) 3, 4 and 5 done clear
D) 3, 2 and 5. done clear
View Solution play_arrow1. Glass |
2. Boron carbide |
3. Graphite |
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_answer86) Consider the following statements:
The strength of a single point cutting tool depends upon |
1. Rake angle |
2. Clearance angle |
3. Lip angle. |
A) 1 and 3 done clear
B) 2 and 3 done clear
C) 1 and 2 done clear
D) 1, 2 and 3. done clear
View Solution play_arrowquestion_answer87) Which of the following materials are used in Grinding wheel?
1. Aluminum oxide |
2. Cubic boron nitride |
3. Silicon carbide. |
Select the correct answer using the codes given below: |
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_arrowquestion_answer88) Consider the following statements related piereing and blanking:
1. Shear on the punch reduces the maximum cutting force. |
2. Shear increases the capacity of the press needed. |
3. Shear increases the life of the punch. |
4. The total energy needed to make the cut remains unaltered due to provision of shear. |
A) 1 and 2 done clear
B) 1 and 4 done clear
C) 2 and 3 done clear
D) 3 and 4. done clear
View Solution play_arrow1. Blocking |
2. Trimming |
3. Finishing |
4. Fullering. |
5. Edging |
A) 1, 4, 3, 2 and 5 done clear
B) 4, 5, 1, 3 and 2 done clear
C) 5, 4, 3, 2 and 1 done clear
D) 5, 1, 4, 2 and 3 done clear
View Solution play_arrowquestion_answer90) The graph shows the results of various quality levels for a component
Consider the following statements: |
1. Curve A shows the variation of value of component. |
2. Curve B shows the variation of cost of the component. |
3. Graph is called as fish bone diagram. |
4. The preferred level of quality is given by line CC. |
5. The preferred level of quality is given by line DD. |
A) 1, 2 and 5 done clear
B) 1, 3 and 4 done clear
C) 2, 3 and 4 done clear
D) 1, 2 and 4 done clear
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