Hydraulic Machines MCQ Multiple Choice Questions Answers | Quiz for Practice

Q: 1. Maximum impulse will be developed in hydraulic ram when

Correct Answer is: waste valve closes suddenly

Q: 2. A hydraulic accumulator normally consists of

Correct Answer is: a cylinder and a ram

Q: 3. A hydraulic intensifier normally consists of

Correct Answer is: two co-axial rams and two cylinders

Q: 4. In reaction turbine, draft tube is used

Correct Answer is: to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section

Q: 5. The efficiency of a centrifugal pump is maximum when its blades are

Correct Answer is: bent backward

Q: 6. In centrifugal pumps, maximum efficiency is obtained when the blades are

Correct Answer is: bent backward

Q: 7. Motion of a liquid in a volute casing of a centrifugal pump is an example of

Correct Answer is: spiral vortex flow.

Q: 8. Air vessels in reciprocating pump are used to

Correct Answer is: reduce acceleration to minimum

Q: 9. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

Correct Answer is: same quantity of liquid

Q: 11. In a reciprocating pump, air vessels are used to

Correct Answer is: Reduce the acceleration head

Hydraulic Machines Multiple Choice Questions (MCQs) are essential practice tools for students and exam aspirants. These questions cover key concepts and help reinforce understanding of hydraulic systems and their applications.

About Hydraulic Machines MCQ Questions

Hydraulic Machines MCQs are designed to test your knowledge of fluid mechanics, pump and turbine operations, and the principles of hydraulic systems. Key concepts include Bernoulli's theorem, energy conversion, and the performance characteristics of various hydraulic machines.

Why Practice Hydraulic Machines Objective Questions?

Practicing Hydraulic Machines MCQs offers several benefits. They help you prepare for school and college exams, enhance your understanding of complex concepts, and improve your performance in competitive exams and job interviews. Regular practice ensures you are well-prepared and confident in your knowledge of hydraulic systems.

Who Should Use These MCQs?

Students preparing for school or college exams
Competitive exam aspirants
Candidates preparing for interviews

Hydraulic Machines MCQ Questions for Practice

1. Maximum impulse will be developed in hydraulic ram when

waste valve closes suddenly
supply pipe is long
supply pipe is short
ram chamber is large

2. A hydraulic accumulator normally consists of

two cylinders, two rams and a storage device
a cylinder and a ram
two co-axial rams and two cylinders
a cylinder, a piston, storage tank and control valve

3. A hydraulic intensifier normally consists of

two cylinders, two rams and a storage device
a cylinder and a ram
two co-axial rams and two cylinders
a cylinder, a piston, storage tank and control valve

4. In reaction turbine, draft tube is used

to transport water downstream without eddies
to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
for safety of turbine
to increase flow rate

5. The efficiency of a centrifugal pump is maximum when its blades are

straight
bent forward
bent backward
bent forward first and then backward

6. In centrifugal pumps, maximum efficiency is obtained when the blades are

straight
bent forward
bent backward
radial

7. Motion of a liquid in a volute casing of a centrifugal pump is an example of

spiral vortex flow.
radial
forced spiral vortex flow
forced cylindrical vortex flow

8. Air vessels in reciprocating pump are used to

smoothen flow
reduce acceleration to minimum
increase pump efficiency
save pump from cavitation

9. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

same quantity of liquid
0.75 Q
Q/0.75
1.5 Q

10. The horse power required in above case will be

same
0.75 B.H.P.
B.H.P./0.75
1.5 B.H.P.

11. In a reciprocating pump, air vessels are used to

Reduce the flow
Increase the delivery head
Smoothen the flow
Reduce the acceleration head

12. In a centrifugal pump casing, the flow of water leaving the impeller, is

rectilinear flow
radial flow
free vortex motion
forced vortex

13. Pressure intensifier increases the pressure in proportion to

ratio of diameters
square of ratio of diameters
inverse ratio of diameters
square of inverse ratio of diameters

14. In axial flow fans and turbines, fluid enters and leaves as follows

radially, axially
axially, radially
axially, axially
radially, radially

15. In a centrifugal pump casing, the flow of water leaving the

radial
radial
centrifugal
vortex