Hydraulics and Fluid Mechanics MCQ Questions with answers and solutions Page 4

Q. Capillary action is due to the

(A) Surface tension
(B) Cohesion of the liquid
(C) Adhesion of the liquid molecules and the molecules on the surface of a solid
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. The intensity of pressure on an immersed surface __________ with the increase in depth.

(A) Does not change
(B) Increases
(C) Decreases
(D) None of these

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✅ Correct Answer: (B) Increases

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. Which of the following statement is correct?

(A) In a compressible flow, the volume of the flowing liquid changes during the flow
(B) A flow, in which the volume of the flowing liquid does not change, is called incompressible flow
(C) When the particles rotate about their own axes while flowing, the flow is said to be rotational flow
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. A flow through a long pipe at constant rate is called

(A) Steady uniform flow
(B) Steady non-uniform flow
(C) Unsteady uniform flow
(D) Unsteady non-uniform flow

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✅ Correct Answer: (A) Steady uniform flow

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. Choose the wrong statement

(A) Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
(B) Viscosity is due primarily to interaction between fluid molecules
(C) Viscosity of liquids decreases with increase in temperature
(D) Viscosity of liquids is appreciably affected by change in pressure

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✅ Correct Answer: (D) Viscosity of liquids is appreciably affected by change in pressure

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. The unit of dynamic viscosity in S.I. units is

(A) N-m/s2
(B) N-s/m2
(C) Poise
(D) Stoke

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✅ Correct Answer: (B) N-s/m2

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. A perfect gas

(A) Has constant viscosity
(B) Has zero viscosity
(C) Is in compressible
(D) None of the above

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✅ Correct Answer: (D) None of the above

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. In a free nappe,

(A) The pressure below the nappe is atmospheric
(B) The pressure below the nappe is negative
(C) The pressure above the nappe is atmospheric
(D) The pressure above the nappe is negative

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✅ Correct Answer: (A) The pressure below the nappe is atmospheric

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. In a static fluid

(A) Resistance to shear stress is small
(B) Fluid pressure is zero
(C) Linear deformation is small
(D) Only normal stresses can exist

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✅ Correct Answer: (D) Only normal stresses can exist

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Q. One litre of water occupies a volume of

(A) 1000 cm3
(B) 250 cm3
(C) 500 cm3
(D) 100 cm3

💬 Discuss

✅ Correct Answer: (A) 1000 cm3

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Hydraulics and Fluid Mechanics

Hydraulics and Fluid Mechanics MCQs | Page - 4

Q. Capillary action is due to the

Q. The intensity of pressure on an immersed surface __________ with the increase in depth.

Q. Which of the following statement is correct?

Q. A flow through a long pipe at constant rate is called

Q. Choose the wrong statement

Q. The unit of dynamic viscosity in S.I. units is

Q. A perfect gas

Q. In a free nappe,

Q. In a static fluid

Q. One litre of water occupies a volume of

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