Hydraulics MCQs
Hydraulics MCQs
Our team has conducted extensive research to compile a set of Hydraulics MCQs. We encourage you to test your Hydraulics knowledge by answering these multiple-choice questions provided below.
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1: Liquids
A. Are not affected by change in pressure and temperature
B. Cannot be compressed
C. Do not occupy definite shape
D. None of these.
2: 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. All these
C. Rate of flow = 27 m3/sec
D. Velocity of flow = 1.5 m/sec
3: Flow in pipes is laminar if Reynold number is
A. More than 3000
B. Less than 2100
C. None of these.
D. Between 2100 and 3000
4: The shear stress distribution in viscous fluid through a circular pipe is:
A. Maximum at the inside of surface
B. Maximum at the centre
C. Same throughout the section
D. None of these.
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. 4.0 metres of water
B. 1 metre of water
C. 3.5 metres of water
D. 3 metres of water
E. 2 metres of water
6: A pitot tube is used to measure
A. Difference in pressure
B. Pressure
C. Velocity of flow
D. None of these
7: Unit of kinematic viscosity is
A. Newton sec/m2
B. Kg sec/m2
C. M2/sec
D. Newton sec/m3
8: Cavitation is caused by
A. None of these.
B. Low velocity
C. High pressure
D. High velocity
E. Low pressure
9: The horizontal component of the force on a curved surface is equal to
A. Weight of liquid vertically below the curved surface
B. Weight of liquid retained by the curved area
C. Force on a vetical projection of the curved surface
D. Product of pressure at its centroid and the area
10: In flow, the liquid particles may possess
A. Potential energy
B. All these
C. Pressure energy
D. Kinetic energy
11: 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. 1g m of water
C. G/2 m of water
12: For critical depth of flow of water in open channels, fc the specific energy must be :
A. Minimum
B. Maximum
C. None of these.
D. Average of maximum and minimum
13: Bernoulli's equation assumes that
A. Fluid is non-viscous
B. All these
C. Flow is along the stream line
D. Flow is steady
E. Fluid is homogeneous
14: 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. 4.0 m
B. 2 m
C. 3.0 m
D. 2.5 m
15: The momentum correction factor (β) for the viscous flow through a circular pipe is
A. 1.66
B. 1.25
C. 1.33
D. 1.50
16: 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.
17: The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is
A. 2.00
B. 1.25
C. 0.5
D. 0.75
18: When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to
A. Difference of weights of the fluid displaced and that of the body
B. Weight of the body
C. Weight of the fluid displaced by the body
D. None of these
E. Weight of the body and fluild displaced by the body
19: For the most economical trapezoidal open channel,
A. The hydraulic mean depth must be equal to half the depth of flow
B. All of these
C. The semicircle drawn with top width as diameter must touch the three sides of the channel
D. Half of the top width must be equal to one of the sloping sides
20: 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. 2π
B. 4π
C. 3π
D. π/2
E. π
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Hydraulics MCQs
