Civil Engineering MCQ Quiz Hub

1. Hydraulic ram is a device used to
Increase the pressure of a liquid
Lift small quantity of water to greater heights
Lift larger loads by applying smaller force
none of the above

2. Reciprocating pump is suited for
Low discharge and high head
High discharge and low head
Low discharge and low head
High discharge and high head

3. The difference of head as shown by manometers connected between the inlet and outlet flanges of the pump is known as
Static head
Total head
Dynamic head
Manometric head

4. Centrifugal pump is a _____ type of pump.
Axial flow
Radial flow
Mixed flow
None of the above

5. Unit discharge is a discharge through a turbine when it is working under
Unit head
Unit head and discharging one cubic metre of water
Unit head and developing unit power
None of the above

6. A Pelton wheel is a _____ impulse turbine
Axial flow
Inward flow
Outward flow
Tangential flow

7. For a semicircular vane when its velocity is half the jet velocity, efficiency is
50%
70%
100%
120%

8. In reaction turbines, total inlet energy is
Pressure energy only
Kinetic energy
Both a and b
None of these

9. The cavitation in a turbine is mainly due to
Low velocity
High velocity
High pressure
Low pressure

10. The cavitation in a turbine is mainly due to
Low velocity
High velocity
High pressure
Low pressure

11. Air vessel is provided to reciprocating pump near its
Suction pipe
Delivery pipe
Neither at suction nor at delivery pipes
Both at suction and delivery pipes

12. The flow is called rotational if its velocity normal to the plane of area is equal to
angular velocity vector
thrice the angular velocity vector
twice the angular velocity vector
None of these

13. Cavitation
causes vibration of various parts of turbine and creates noise
reduces discharge
causes vibration of various parts of turbine and creates noise
All of the above

14. A pump is a device which converts
mechanical energy into electrical energy
mechanical energy into hydraulic energy
hydraulic energy into mechanical energy
none of the above

15. In a centrifugal pump casing, the flow of water leaving the impeller, is
forced vertex
free vortex motion
rectilinear flow
radial flow

16. The instrument used for measuring the velocity of flow, is known as
pitot tube
Venturimeter
Orifice meter
none of these

17. Hydraulic press is a device used to
lift larger loads by applying smaller force
increase the pressure of a liquid
lift small quantity of water to greater height
All of the above

18. In impulsive turbine, the total energy at inlet is
pressure energy
kinetic energy
both kinetic and potential energy
none of the above

19. At higher heads, the liquid which has passed through the impeller of the centrifugal pump may flow in limited quantity back to the suction side. This is known as
delivery head loss
friction loss
leaking loss
suction head loss

20. Which one of the following is a impulsive turbine
Pelton wheel
Kaplan turbine
Francis turbine
None of the above

21. A Francis turbine is an _____ flow reaction turbine.
axial
inward
outward
tangential

22. Specific speed of a centrifugal pump is the speed at which a pump runs when
discharge and shaft power are unity
head and discharge are unity
head and shaft power are unity
none of the above

23. In Pelton wheel
both velocity and pressure do not change
both velocity and pressure change
the velocity of jet remains same, the pressure changes
the velocity of jet changes, the pressure throughout remain at atmospheric

24. Involute type centrifugal pump, the passage of fluid
remains same throughout
gradually increases
gradually decreases
both a and b

25. In flow, the liquid particles may possess
pressure energy
potential energy
kinetic energy
all the above

26. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called
streak line
potential line
stream line
path line

27. For well maintained reciprocal pumps, slip is of the order
2%
5%
10%
18%