Hydraulics Online Test – Paper 2

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Total Questions: 30
Time Allotted: 30 minutes
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1 / 30

1. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

a) specific weight

b) specific mass

c) specific gravity

d) none of the above

2 / 30

2. *Losses are more in

a) laminar flow

b) critical flow

c) turbulent flow

d) transition flow

3 / 30

3. Total head of a particle in motion is the sum of

a) potential head and kinetic head

b) kinetic head and pressure head

c) potential head and pressure head

d) potential head, kinetic head, and pressure head

4 / 30

4. When the pipes are connected in series, the total rate of flow

a) is equal to the sum of the rate of flow in each pipe

b) is equal to the reciprocal of the sum of the rate of flow in each pipe

c) is the same as flowing through each pipe

d) none of the above

5 / 30

5. *Bernoulli's theorem deals with the law of conservation of

a) energy

b) all of the above

c) mass

d) momentum

6 / 30

6. A triangular notch is preferred to a rectangular notch because

a) only one reading is required

b) its formula is simple to remember

c) it gives more accurate results for low discharge (Q≤100m^3/sec)

d) it measures a wide range of flows accurately

7 / 30

7. A substance which deforms continuously under the action of shear stress is called

a) fluid

b) liquid

c) solid

d) gas

8 / 30

8. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

a) hydraulic jump

b) standing wave

c) both (a) and (b) above

d) water cushion

9 / 30

9. A siphon is used

a) to connect water reservoirs at different levels intervened by a hill

b) to supply water to a town from a higher level to a lower level

c) to fill up a tank with water at a higher level from a lower level

d) none of the above

10 / 30

10. Super-critical flow occurs in

a) normal slope

b) mild slope

c) steep slope

d) all of the above

11 / 30

11. *Manometers are used to measure

a) pressure in water channels, pipes, etc.

b) difference in pressure at two points

c) atmospheric pressure

d) very low pressure

12 / 30

12. *The difference between the total energy gradient line and the total energy line is

a) kinetic head

b) pressure head

c) datum head

d) loss of head

13 / 30

13. *The magnitude of capillary rise is more in:

a) silts

b) sands

c) clays

d) gravels

14 / 30

14. In an open tube, the free surface of mercury remains

a) horizontal

b) curved upwards

c) curved downwards

d) none of the above

15 / 30

15. *Orifice-meter is used to measure:

a) pressure at the point

b) discharge

c) average speed

d) velocity

16 / 30

16. In the case of leveling by a level pipe, the level is indicated by

a) upper face

b) middle face

c) lower face

d) all of the above

17 / 30

17. *The atmospheric pressure varies with

a) altitude

b) temperature

c) weather conditions

d) none of the above

18 / 30

18. *The magnitude of water hammer depends upon

a) the length of the pipeline

b) elastic properties of liquid

c) elastic properties of the pipe material

d) diameter of the pipeline

19 / 30

19. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

a) submerged weir

b) narrow-crested weir

c) broad-crested weir

d) ogee weir

20 / 30

20. If the Froude number in open channel flow is equal to 1.0, the flow is called

a) critical flow

b) streaming flow

c) shooting flow

d) none of the above

21 / 30

21. *The discharge through a trapezoidal channel is maximum when

a) m = d

b) m = 2d

c) m = 3d

d) m = d/2

22 / 30

22. The capillary rise or fall of the liquid is given by

a) h = σ cos θ / 4ρgd

b) h = 4σ cos θ / ρgd

c) h = 8σ cos θ / ρgd

d) none of the above

23 / 30

23. Cavitations is collapsed by

a) low pressure

b) high pressure

c) low velocity

d) high velocity

24 / 30

24. *Viscosity of a liquid

a) drops with temperature

b) rises with temperature

c) does not vary with temperature

d) remains constant up to a certain temperature

25 / 30

25. *Water cushion is used to

a) sit in the house

b) destroy the energy

c) produce energy

d) none of the above

26 / 30

26. *The difference between the total energy line and the hydraulic gradient line is

a) kinetic head

b) pressure head

c) datum head

d) loss of head

27 / 30

27. *The rate of flow through a V-notch varies as:

a) H

b) H1/2

c) H3/2

d) H5/2

28 / 30

28. The viscosity of liquids varies with temperature

a) directly proportional

b) inversely proportional

c) constant

d) none of the above

29 / 30

29. For uniform flow in the channel

a) the total energy line, hydraulic gradient line, and the bottom of the channel are parallel

b) the total energy line and water surface are horizontal, while the bottom of the channel is inclined

c) total energy line, water surface, and the bottom of the channel are parallel

d) none of the above

30 / 30

30. *Bernoulli's equation is applied to

a) venturimeter

b) orifice meter

c) pitot tube

d) all of the above

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Hydraulics Online Test – Paper 2

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