Hydraulics Online Test - Paper 3

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Vikash chaudhary

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Total Questions: 50
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1 / 50

1. *A pitot tube is used to measure

a) pressure

b) different in pressure

c) velocity of flow

d) none of the above

2 / 50

2. The depth of flow after the hydraulic jump is

a) d2 = d1/2 [√1+8(Fe)1^2 -1]

b) d1 = d2/2 [√1+8(Fe)1^2 -1]

c) d2 = d1/3 [√1+8(Fe)1^2 -1]

d) d2 = d1/2 [√1+2(Fe)1^2 -1]

3 / 50

3. "Maximum efficiency of power transmission through a pipe is

a) 50%

b) 60%

c) 66%

d) 76%

4 / 50

4. *The hydraulic ram is a pump that works on

a) the principle of water hammer

b) the principle of centrifugal action

c) the principle of reciprocation action

d) all of the above

5 / 50

5. Liquids

a) cannot be compressed

b) do not occupy definite shape

c) are not affected by change in pressure and temperature

d) none of the above

6 / 50

6. For any channel section, the specific energy increase with

a) decreases in depth of super critical flow

b) increases in depth of super critical flow

c) increases in depth of sub critical flow

d) none of the above

7 / 50

7. Practical fluids possess

a) viscosity

b) surface tension

c) compressibility

d) all of the above

8 / 50

8. 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

9 / 50

9. 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

10 / 50

10. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

a) h_f = 4fLV^2/2gd

b) h_f = fLV^2/2gd

c) h_f = 0.5V^2 / 2g

d) h_f = (v_1-v_2)^2 / 2g

11 / 50

11. The error 1% in measuring H will produce a

a) 1%

b) 1.5%

c) 2%

d) 2.5%

12 / 50

12. The maximum velocity in an open channel occurs

a) at the bottom of the channel

b) at 1/2 the depth of the channel

c) slightly below the free surface

d) at the free surface

13 / 50

13. Weber number is the ratio of inertia force to

a) surface tension

b) gravitational force

c) elasticity

d) viscosity

14 / 50

14. *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

15 / 50

15. *If fluid or flow parameters at any given instant remain the same at every point in space, it is called:

a) steady flow

b) laminar flow

c) uniform flow

d) rotational flow

16 / 50

16. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

a) Pascal

b) Newton

c) Archimedes

d) all of the above

17 / 50

17. *An independent mass of a fluid does not possess

a) elevation energy

b) kinetic energy

c) pressure energy

d) none of the above

18 / 50

18. The pressure less than atmospheric pressure is known as

a) suction pressure

b) vacuum pressure

c) negative pressure

d) all of the above

19 / 50

19. Hooke's law for solids is analogous to

a) Newton's law of viscosity

b) Pascal's law

c) Boundary layer theory

d) continuity equation

20 / 50

20. *The continuity equation deals with the law of conservation of

a) mass

b) momentum

c) energy

d) force

21 / 50

21. When the pipes are connected in parallel, the total loss of head

a) is equal to the sum of the loss of head in each pipe

b) is the same as in each pipe

c) is equal to the reciprocal of the sum of the loss of head in each pipe

d) none of the above

22 / 50

22. *The upper surface of the weir over which water flows is known as:

a) vein

b) nappe

c) sill

d) none of the above

23 / 50

23. Which of the following quantities are dimensionless?

a) surface tension

b) specific weight

c) angular velocity

d) Mach number

24 / 50

24. The flow in which each liquid particle has a definite path is called

a) stream line flow

b) uniform flow

c) steady flow

d) turbulent flow

25 / 50

25. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

a) 0.0116 cm³/sec

b) 0.116 cm³/sec

c) 0.0160 cm³/sec

d) 0.00116 cm³/sec

26 / 50

26. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a rectangular notch is

a) 1/2

b) 2/3

c) 3/2

d) 3/4

27 / 50

27. *Back water curve is caused if there is a

a) friction head loss is more than the bed slope

b) obstruction due to weir in the channel

c) there is an increase in width of the channel

d) none of the above

28 / 50

28. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

a) 2/3

b) 3/2

c) 2/5

d) 5/2

29 / 50

29. *In flow, the liquid particles may possess

a) potential energy

b) kinetic energy

c) pressure energy

d) all of the above

30 / 50

30. 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

31 / 50

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

a) half of the width = sloping side

b) top width = 1/2 sloping side

c) top width = 1.5 sloping side

d) none of the above

32 / 50

32. A siphon is an

a) L-shaped pipe

b) U-shaped pipe

c) inverted U-shaped pipe

d) all of the above

33 / 50

33. Mouthpieces are used to measure

a) velocity

b) pressure

c) head

d) rate of flow

34 / 50

34. ........ is defined as the maximum increase in water level in the path of the flow of water

a) afflux

b) rising of the wall

c) flood

d) rainfall

35 / 50

35. Mach number is the ratio of inertia force to

a) viscosity

b) Froude number

c) gravitational force

d) elasticity

36 / 50

36. In a flowing liquid, a particle may possess

a) potential energy

b) kinetic energy

c) pressure energy

d) all of the above

37 / 50

37. The two depths at which the specific energy is the same are called

a) alternate depths

b) conjugate depths

c) critical depths

d) normal depths

38 / 50

38. One horsepower is equal to

a) 1 kW

b) 0.746 kW

c) 0.836 kW

d) 0.756 kW

39 / 50

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

a) silts

b) sands

c) clays

d) gravels

40 / 50

40. *Barometers 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

41 / 50

41. Water hammer is a phenomenon that occurs

a) when pressure increases sudden closure of the valve

b) when pressure decreases sudden opening of the valve

c) due to the elastic material of the pipe

d) due to the incompressible nature of the fluid

42 / 50

42. Hydrostatic pressure on a dam depends upon its

a) length

b) depth

c) shape

d) both (b) and (c) of the above

43 / 50

43. *To measure atmospheric pressure, we use

a) barometers

b) piezometer

c) manometers

d) differential manometers

44 / 50

44. *The main assumption of Bernoulli's equation is

a) the velocity of energy of liquid particles across any cross-section of a pipe is uniform

b) no external force except gravity acts on the liquid

c) there is no loss of energy of the liquid while flowing

d) all of the above

45 / 50

45. *The actual velocity through an orifice is........... than the theoretical velocity.

a) more

b) less

c) equal

d) not defined

46 / 50

46. A fluid particle may possess the displacement of

a) translation

b) rotation

c) distortion

d) all of the above

47 / 50

47. In an inclined position, a venturimeter records

a) less reading

b) same reading

c) more reading

d) none of the above

48 / 50

48. *The term v^2/2g is known as

a) kinetic energy

b) pressure energy

c) kinetic energy per unit weight

d) none of the above

49 / 50

49. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

a) steady flow

b) uniform flow

c) incompressible flow

d) rotational flow

50 / 50

50. *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

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Hydraulics Online Test – Paper 3

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