Hydraulics Objective Type Questions - Set 24 - ObjectiveBooks
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# Practice Test: Question Set - 24

1. The force present in a moving liquid is
(A) Inertia force
(B) Viscous force
(C) Gravity force
(D) All of these

2. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
(A) 10 m/sec
(B) 25 m/sec
(C) 2 m/sec
(D) 50 m/sec

3. The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.
(A) Higher
(B) Lower
(C) Same
(D) None of these

4. The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as
(A) One dimensional flow
(B) Uniform flow
(D) Turbulent flow

5. The coefficient of discharge for an external mouthpiece depends upon
(A) Velocity of liquid
(B) Pressure of liquid
(C) Area of mouthpiece
(D) Length of mouthpiece

6. The specific weight of water is 1000 kg/m3
(A) At normal pressure of 760 mm
(B) At 4°C temperature
(C) At mean sea level
(D) All the above

7. If the depth of water in an open channel is greater than the critical depth, the flow is called
(A) Critical flow
(B) Turbulent flow
(C) Tranquil flow
(D) Torrential flow

8. When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
(B) Turbulent flow
(C) Vortex flow
(D) Uniform flow

9. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
(A) Equal to
(B) Less than
(C) More than
(D) None of these

10. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be
(A) 500 kg
(B) 1000 kg
(C) 1500 kg
(D) 2000 kg

11. The velocity at which the laminar flow stops, is known as
(A) Velocity of approach
(B) Lower critical velocity
(C) Higher critical velocity
(D) None of these

12. The line of action of the buoyant force acts through the
(A) Centroid of the volume of fluid vertically above the body
(B) Centre of the volume of floating body
(C) Center of gravity of any submerged body
(D) Centroid of the displaced volume of fluid

13. The buoyancy depends upon the
(A) Weight of the liquid displaced
(B) Pressure with which the liquid is displaced
(C) Viscosity of the liquid
(D) Compressibility of the liquid

14. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)
(A) 4wd/σ cosα
(B) σ cosα/4wd
(C) 4σ cosα/wd
(D) wd/4σ cosα

15. Two dimensional flows occurs when
(A) The direction and magnitude of the velocity at all points are identical
(B) The velocity of successive fluid particles, at any point, is the same at successive periods of time
(C) The magnitude and direction of the velocity do not change from point to point in the fluid
(D) The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

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