500 Best Hydraulics MCQ

Q25). 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.

Correct Answer:
500 H.P.
Explanation:



Q26). 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.

Correct Answer:
hydraulic jump
Explanation:



Q27). 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.

Correct Answer:
force on a vetical projection of the curved surface
Explanation:



Q28). 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

Correct Answer:

Explanation:



Q29). 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.

Correct Answer:
difference in pressure at two points
Explanation:



Q30). 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).44563
d).44564

Correct Answer:
3
Explanation:



Q31). Highest dam in India, is

a).Bhakra dam
b).Hirakund dam
c).Nagarjuna Sagar dam
d).Iddiki dam.

Correct Answer:
Bhakra dam
Explanation:



Q32). 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.

Correct Answer:
do not occupy definite shape
Explanation:



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