##### Q11. Bernoulli’s equation is derived making assumptions that

(a) the flow is uniform, steady and incompressible
(b) the flow is non-viscous, uniform and steady
(c) the flow is steady, non-viscous, incompressible and irrotational
(d) none of the above.

Ans: (c) the flow is steady, non-viscous, incompressible and irrotational

##### Q12. If the velocity in a fluid flow does not change with respect to length of direction of flow, it is called

(b) uniform flow
(c) incompressible flow
(d) rotational flow.

Ans: (c) incompressible flow

##### Q13. If the velocity in a fluid flow changes with respect to length of direction of flow, it is called

(b) compressible flow
(c) irrotational flow
(d) none of the above.

Ans: (d) none of the above.

##### Q14. If the density of a fluid is constant from point to point in a flow region, it is called

(b) incompressible flow
(c) uniform flow
(d) rotational flow.

Ans: (b) incompressible flow

##### Q15 Bernoulli’s theorem deals with the law of conservation of

(a) mass
(b) momentum
(c) energy
(d) none of the above.

Ans:  (c) energy

##### Q16. Continuity equation deals with the law of conservation of

(a) mass
(b) momentum
(c) energy
(d) none of the above.

Ans: (a) mass

##### Q17. Irrotational flow means

(a) the fluid does not rotate while moving
(b) the fluid moves in straight lines
(c) the net rotation of fluid-particles about their mass centres is zero
(d) none of the above.

Ans:  (c) the net rotation of fluid-particles about their mass centres is zero

##### Q18. The point, through which the buoyant force is acting, is called

(a) centre of pressure
(b) centre of gravity
(c) centre of buoyancy
(d) none of the above.

Ans:  (c) centre of buoyancy

##### Q19. The point, through which the weight is acting, is called

(a) centre of pressure
(b) centre of gravity
(c) centre of buoyancy
(d) none of the above.

Ans:  (b) centre of gravity

##### Q20. The point, about which a floating body, starts oscillating when the body is tilted is called

(a) centre of pressure
(b) centre of buoyancy
(c) centre of gravity
(d) metacentre.

Ans:  (d) metacentre.

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Hydraulics and Fluid mechanics MCQ-Section-1

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Hydraulics and Fluid mechanics MCQ-Section-3

Hydraulics and Fluid mechanics MCQ-Section-4

Hydraulics and Fluid mechanics MCQ-Section-5