Fluid Mechanics PYQs, GPSC Civil Engineering (Page – 1)

1. A vessel of 4 m³ contains an oil which weighs 30 kN. The specific weight of this oil is _______

C) 7.5 kN/m³

2. The mercury does not wet the glass. This is due to the property of liquid known as _______

D) Surface Tension

3. When a vertical wall is subjected to a pressure due to liquid on both sides, the resultant pressure is the _______ of these two pressures.

B) Difference

4. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

A) coincides with the centre of gravity.

5. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as _______

B) Stream line

6. The Euler’s equation for the motion of fluids is based on the assumption that

(i) The fluid is non-viscous, homogenous, and incompressible.

(ii) The velocity of flow is uniform over the section.

(iii) The flow is continuous, steady and along the stream line.

D) (i), (ii) and (iii)

7. The coefficient of discharge for an external mouthpiece depends upon

D) Length of mouthpiece

8. A lawn sprinkler works on which of the follow principles or equation?

C) Moment of momentum principle

9. In a free nappe,

A) The pressure below the nappe is atmospheric.

10. The magnitude of water hammer depends upon the

(i) Elastic properties of pipe material.

(ii) Elastic properties of liquid flowing through the pipe.

(iii) Speed at which the valve is closed.

D) (i), (ii) and (iii)

11. The discharge through a channel of circular section will be maximum when the depth of water is _______ times the diameter of circular channel.

D) 0.95


A) ડભોઈનો કિલ્લો – ચૌલાદેવી


A) નાગભટ્ટ-II


A) ભાવનગર


C) ઔરંગઝેબ

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