Top 50+ Solved Hydraulics Machines MCQ Questions Answer

From 1 to 15 of 48

Q. A Pelton wheel is

a. tangential flow impulse turbine

b. inward flow impulse turbine

c. outward flow impulse turbine

d. inward flow reaction turbine

  • a. tangential flow impulse turbine

Q. The runaway speed of a hydraulic turbine is the speed

a. at full load

b. at which there will be no damage to the runner

c. corresponding to maximum overload permissible

d. at which the turbine will run freely without load

  • d. at which the turbine will run freely without load

Q. A hydraulic press is a device used

a. to store pressure energy which may be supplied to a machine later on

b. to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure

c. to lift larger load by the application of a comparatively much smaller force

d. all of the above

  • c. to lift larger load by the application of a comparatively much smaller force

Q. Mechanical efficiency of a centrifugal pump is the ratio of

a. energy available at the impeller to the energy supplied to the pump by the prime mover

b. actual workdone by the pump to the energy supplied to the sump by the prime mover

c. energy supplied to the pump to the energy available at the impeller

d. manometric head to the energy supplied by the impeller per kN of water

  • a. energy available at the impeller to the energy supplied to the pump by the prime mover

Q. The impeller of a centrifugal pump may have

a. volute casing

b. volute casing with guide blades

c. vortex casing

d. any one of these

  • d. any one of these

Q. Which of the following pump is sucessfully used for lifting water to the boilers?

a. Centrifugal pump

b. Reciprocating pump

c. Jet pump

d. Air-lift pump

  • c. Jet pump

Q. The flow ratio in case of Francis turbine varies from

a. 0.15 to 0.3

b. 0.4 to 0.5

c. 0.6 to 0.9

d. 1 to 15

  • a. 0.15 to 0.3

Q. Which type of the pump is defferent from others in the same group?

a. Screw pump

b. Gear pump

c. Cam and piston pump

d. Plunger pump

  • d. Plunger pump

Q. Dynamic similarity is said to exist between the model and the prototype, if both of them

a. have identical velocities

b. are equal in size and shape

c. are identical in shape, but differ only in size

d. none of the above

  • d. none of the above

Q. The speed of an imaginary turbine, identical with the fiven turbine, which will develop a unit power under a unit head, is known as

a. normal speed

b. unit speed

c. specific speed

d. none of these

  • c. specific speed

Q. Which of the following pump is sucessfully used for lifting water to the wells?

a. Centrifugal pump

b. Reciprocating pump

c. Jet pump

d. Air-lift pump

  • d. Air-lift pump

Q. Which of the following pump is preferred for flood control and irrigation applications?

a. Centrifugal pump

b. Axial flow pump

c. Mixed flow pump

d. Reciprocating pump

  • b. Axial flow pump

Q. In a centrifugal pump, the regulating valve is provided on the

a. casing

b. delivery pipe

c. suction pipe

d. impeller

  • b. delivery pipe
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