## Hydraulic Machines MCQ Questions and Answers Quiz

41. Casting of a centrifugal pump is designed so as to minimize

1. friction loss
2. cavitation
4. loss of kinetic energy

42. A draft tube is not required for a

1. Francis turbine
2. Kaplan turbine
3. Pelton wheel turbine
4. None of the above

43. Indicator diagram of a reciprocating pump is a graph between

1. flow vs swept volume
2. pressure in cylinder vs swept volume
3. flow vs speed
4. pressure vs speed

44. Overall efficiency of a centrifugal pump is the ratio of

1. Energy available at the impeller to the energy supplied to the pump by the prime mover
2. Actual work done by the pump to the energy supplied to the pump by the prime mover
3. Energy supplied to the pump to the energy available at the impeller
4. Manometric head to the energy supplied by the impeller per Newton of water

45. Puck up the wrong statement about centrifugal pump

1. discharge a diameter
4. Power a speed

46. According to fan laws, at constant speed and capacity, the pressure and power vary

1. directly as the air or gas density
2. inversely as square root of density
3. inversely as density
4. as square of density

47. According to fan laws, at constant pressure, the speed capacity and power vary

1. directly as the air or gas density
2. inversely as square root of density
3. inversely as density
4. as square of density

48. According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

1. directly as the air or gas density
2. inversely as square root of density
3. inversely as density
4. as square of density

49. According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

1. directly as fan speed
2. square of fan speed
3. cube of fan speed
4. square root of fan speed

50. According to fan laws, for fans having constant wheel diameter, the pressure varies

1. directly as fan speed
2. square of fan speed
3. cube of fan speed
4. square root of fan speed
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MCQ Multiple Choice Questions and Answers on Hydraulic Machines

Hydraulic Machines Trivia Questions and Answers PDF