1. A pitot tube is used to measure
a) pressure
b) difference in pressure
c) velocity of flow
d) none of these.
2. The thickness of a sharp crested weir is kept less than
a) one-third of the height of water on the sill
b) one-half of the height of water on the sill
c) one-fourth of the height of water on the sill
d) none of these.
3. The property of steam function ψ is :
a) ψ is constant everwhere on any stream line
b) the flow around any path in the fluid is zero for continuous flow
c) the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction
d) all the above.
4. The maximum vacuum created at the summit of a syphon is
a) 2.7 m of water
b) 7.4 m of water
c) 5.5 m of water
d) none.
5. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is
a) 1 metre of water
b) 2 metres of water
c) 3 metres of water
d) 4.0 metres of water.
6. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if
a) area is horizontal
b) area is vertical
c) area is inclined
d) all the above.
7. If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its
a) specific weight
b) specific mass
c) specific gravity
d) none of these.
8. Bernoulli's equation assumes that
a) fluid is non-viscous
b) fluid is homogeneous
c) flow is steady
d) all the above.
9. The time required to close a valve gradually is (where L is the length of pipe and C = velocity of pressure wave)
a) (2L/C)
b) less than or equal to (2L/C)
c) greater than (2L/C)
d) less than (4L/C)
10. A syphon is used
a) to connect water reservoirs at different levels intervened by a hill
b) to supply water to a town from higher level to lower level
c) to fill up a tank with water at higher level from a lower level
d) none of these.
11. Most economical section of a circular channel for maximum discharge
a) depth of water = 0.95 diameter of circular section
b) hydraulic mean depth = 0.286 diameter of circular section
c) wetted perimeter = 2.6 diameter of circular section
d) all the above.
12. Unit of kinematic viscosity is
a) m2/sec
b) Newton sec/m2
c) Newton sec/m3
d) Kg sec/m2.
13. The moment of inertia of a floating body along its longitudinal axis and the volume of water displaced by it are I and V respectively. The height of the metacentre above centre of buoyancy of the body, is
a) 
b) 
c) 
d) 
14. Time of emptying liquid from a hemispherical vessel through an orifice at its bottom, is
a) 
b) 
c)
d)
15. Critical depth (h) of a channel, is
a)
b) 
c) 
d) 
16. The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is
a) 0.5
b) 0.75
c) 1.25
d) 2.00
17. The shear stress distribution in viscous fluid through a circular pipe is :
a) maximum at the centre
b) maximum at the inside of surface
c) same throughout the section
d) none of these.
18. Product of Renold number, Froud's number and Mach number is :
a) 
b) 
c)
d) 
19. A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec2. The ratio of the pressures at its bottom when it is moving vertically up and down, is
a) 2
b) 3
c) 1/2
d) 1/3
20. The side slope of Cipolletti weir is generally kept
a) 1 to 4
b) 1 to 3
c) 1 to 2
d) 1 : 5
21.
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at B is
a) 10,000 kgf
b) 15,000 kgf
c) 20,000 kgf
d) 18,000 kgf.
22. Inside pressure in a hollow soap bubble in the air is : (where d is the diameter of the bubble)
a)
b) 
c) 
d) 
23. The momentum correction factor (β) for the viscous flow through a circular pipe is
a) 1.25
b) 1.33
c) 1.50
d) 1.66
24. A piezometer opening in pipes measures
a) velocity head
b) static pressure
c) total pressure
d) negative static pressure.
25. An independent mass of a fluid does not posses
a) elevation energy
b) kinetic energy
c) pressure energy
d) none of these.
26. A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is
a) less than 12.2 m of the water
b) more than 12.2 m of the water
c) equal of 12.2 m of water
d) none of these.
27. Hydrostatic pressure on a dam depends upon its
a) length
b) depth
c) shape
d) both (b) and (c).
28. A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is
a) 2/g m of water
b) g/2 m of water
c) 1g m of water
d) (sqrt g) m of water.
29. Maximum efficiency of transmission of power through a pipe, is
a) 25%
b) 33.3%
c) 50%
d) 66.67%.
30. An ideal flow of a liquid obeys
a) Continuity equation
b) Newton's law of viscosity
c) Newton's second law of motion
d) dynamic viscosity law,
31. Euler's equation for motion of liquids, is given by
a) 
b)
c) 
d) ρdp + gdz + vdv = 0
32. Reynold number is the ratio of initial force and
a) viscosity
b) elasticity
c) gravitational force
d) surface tension.
33. When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to
a) weight of the body
b) weight of the fluid displaced by the body
c) weight of the body and fluild displaced by the body
d) none of these.
34. If D is the diameter of a pipe of length L and f is the coefficient of friction of pipe then diameter of the nozzle d is
a)
b)
c) 
d) none of these.
35. If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is
a) 400 H.P.
b) 450 H.P.
c) 500 H.P.
d) 550 H.P.
36. The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is
a) water hammer
b) hydraulic jump
c) critical discharge
d) none of these.
37. In a circular pipe of length L and diameter d, a viscous liquid is flowing with a velocity v. The loss in head, is
a)
b) 
c)
d) none of these.
38. The horizontal component of the force on a curved surface is equal to
a) weight of liquid vertically below the curved surface
b) force on a vetical projection of the curved surface
c) product of pressure at its centroid and the area
d) weight of liquid retained by the curved area.
39. The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is
a) π
b) 2π
c) 3π
d) 4π
40. A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length
a) 
b) 
c) 
d) 
41. The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is
a)
b)
c) 
d)
42. Differential 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.
43. Liquids
a) cannot be compressed
b) do not occupy definite shape
c) are not affected by change in pressure and temperature
d) none of these.
44. The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is
a) 2/3
b) 3/2
c) 2/5
d) 5/2
45. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called
a) Euler number
b) Frode number
c) Reynold number
d) Weber number.
46. A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy's constant C = 54.8, pick up the correct specification of the channel from the following :
a) hydraulic mean depth = 1.5 m
b) Velocity of flow = 1.5 m/sec
c) Rate of flow = 27 m3/sec
d) All the above.
47. Non-over flow double curvature concrete arch, is provided in
a) Bhakra dam
b) Hirakund dam
c) Nagarjuna Sagar dam
d) Idukki dam.
48. For the most economical trapezoidal open channel,
a) half of the top width must be equal to one of the sloping sides
b) the hydraulic mean depth must be equal to half the depth of flow
c) the semicircle drawn with top width as diameter must touch the three sides of the channel
d) All of these.
49. Hydraulic ram is a device
a) for lifting water without an electric motor
b) for accelerating water flow
c) for lifting heavy loads
d) none of these.
50. Gauge pressure is
a) absolute pressure - atmospheric pressure
b) absolute pressure + atmospheric pressure
c) atmospheric pressure - absolute pressure
d) none of these.
51.
The mouth piece shown in the below figure is generally known as
a) Internal mouth piece
b) Re-entrant mouth piece
c) Borda's mouth piece
d) All the above.
52. If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is
a)
b) 
c) 
d) none of these.
53. If jet of water coming out from a nozzle with a velocity 9.81 m/s, the angle of elevation being 30°, the time to reach the highest point is
a) 0.25 s
b) 0.50 s
c) 1.0 s
d) 1.5 s.
54. The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m3/s. The head over the mouth piece is
a) 2 m
b) 2.5 m
c) 3.0 m
d) 4.0 m.
55. If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be
a) higher than the surface of liquid
b) same as the surface of liquid
c) lower than the surface of liquid
d) none of these.
56. The continuity equation
a) expresses the relationship between work and energy
b) relates the momentum per unit volume between two points on a stream line
c) relates mass rate of flow along a stream line
d) requires that Newton's second law of motion be satisfied at every point in fluid.
57. Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is
a) 17.5 m3
b) 20.0 m3
c) 22.5 m3
d) 25 km3.
58. In pipe lines, a surge tank is provided
a) to relieve the pressure due to water hammer
b) to provide additional water head
c) to overflow the pipe line when suddenly closed
d) to remove the frictional loss in pipe.
59. Total head of a liquid particle in motion is the sum of
a) potential head and kinetic head
b) potential head and kinetic head
c) potential head and pressure head
d) potential head, kinetic head and pressure head.
60. The velocity distribution of viscous fluid through a circular/pipe is :
a) hyperbolic
b) circular
c) parabolic
d) elliptical.
61. Mercury is generally used in barometers because
a) its vaour pressure is practically zero
b) the height of the barometer will be less
c) it is a best liquid
d) both (a) and (b) above
62. Flow in pipes is laminar if Reynold number is
a) less than 2100
b) more than 3000
c) between 2100 and 3000
d) none of these.
63. The terminal velocity (v) of a sphere of radius r and specific weight W, which travels vertically downwards in a liquid of viscosity μ and specific weight W, is
a) 
b) 
c) 
d)
64. In flow, the liquid particles may possess
a) potential energy
b) kinetic energy
c) pressure energy
d) all the above.
65. Euler's equation for the motion of liquids assumes that
a) fluid is viscous
b) fluid is homogeneous and incompressible
c) velocity of flow is non-uniform over the section
d) flow is unsteady along the stream line.
66. The height of water level in a tank above the centre of a circular hole 2.5 cm in diameter is 50 m. The velocity of water flowing through the hole, is
a) 31.1 m/sec
b) 31.2 m/sec
c) 31.3 m/sec
d) 31.4 m/sec.
67. A steady uniform flow is through
a) a long pipe at decreasing rate
b) a long pipe at constant rate
c) an expanding tube at constant rate
d) an expanding tube at increasing rate
68. Cavitation is caused by
a) Low pressure
b) High pressure
c) Low velocity
d) None of these.
69. Mach number is the ratio of inertia force to
a) viscosity
b) surface tension
c) gravitational force
d) elasticity.
70. Hydraulic gradient is equal to difference in water surfaces
a)
b) 
c) 
d) 
71. The main assumption of Bernoulli's equation is :
a) The velocity of energy of liquid particle, across any cross-section of a pipe is uniform
b) No external force except the gravity acts on the liquid
c) There is no loss of energy of the liquid while flowing
d) All the above.
72. The valve closure is said to be sudden if
a) 
b)
c) 
d) 
73. If Re is the Renold's number, the coefficient of friction for laminar flow is
a) 
b) 
c) 
d) 
74. The length of pipe is L, velocity of flow of a liquid in the pipe is V. If t is the time in second required to close the valve, the head of pressure
a) 
b) 
c)
d) none of these.
75. For critical depth of flow of water in open channels, fc the specific energy must be :
a) minimum
b) maximum
c) average of maximum and minimum
d) None of these.
76. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing
a) Reynold number
b) Froude number
c) Weber number
d) Mach number.
77. The discharge over a Cipolletti weir of length 2.185 m when the head over the weir is 1 m, is
a) 2.0 m3
b) 2.5 m3
c) 3.0 m3
d) 4.0 m3
78. The velocity of the fluid particle at the centre of the pipe section, is
a) minimum
b) maximum
c) equal throughout
d) none of these.
79. Due to decrease of diameter of the droplet, inside pressure intensity
a) increases
b) decreases
c) remains unaffected
d) None of these.
80. In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be
a) 2 mm
b) 4 mm
c) 6 mm
d) 8 mm
81. When water flows over a rectangular suppressed weir, the negative pressure created beneath the nappe
a) increases the discharge
b) decreases the discharge
c) does not effect the discharge
d) none of these.
82. Barometres 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
83. For most economical rectangular section of a channel, the depth is kept
a) one-fourth of the width
b) three times the hydraulic radius
c) half the width
d) none of these.
84. In a centrifugual pump casing, the flow of water leaving the impeller, is
a) rectilinear flow
b) radial flow
c) free vortex motion
d) forced vertex.
85. In fluids, steady flow occurs when
a) conditions of flow change steadily with time
b) conditions of flow do not change with time at a point
c) conditions of flow remain the same at adjacent point
d) velocity vector remains constant at a point.
86.
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at A is
a) 14,137 kgf
b) 5,863 kgf
c) 20,000 kgf
d) 18,000 kgf.
87. From a nozzle exposed to atmosphere, the liquid jet traverses
a) a straight line
b) a circular path
c) an elliptical path
d) a parabolic path.
88. To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is
a) 2°
b) 3°
c) 4°
d) 5°
89. An orifice is taken as large if
a) (H2 - H1 ) > H
b) (H2 - H1 ) > H/4
c) (H2 - H1 ) > H/2
d) (H2 - H1 ) > H/3
90. A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is
a) 459 kg
b) 549 kg
c) 945 kg
d) 954 kg
