Hydraulics and Fluid Mechanics

Question: Falling drops of water become spheres due to the property of
[A].

surface tension of water

[B].

compressibility of water

[C].

capillarity of water

[D].

viscosity of water

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the manufacturing of lead shots, the property of surface tension is utilised.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Question: A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)
[A].

[B].

[C].

[D].

Answer: Option C

Explanation:

No answer description available for this question.

Question: A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
[A].

it is easier to see through the glass tube

[B].

glass tube is cheaper than a metallic tube

[C].

it is not possible to conduct this experiment with any other tube

[D].

all of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
[A].

Yes

[B].

No

Answer: Option B

Explanation:

No answer description available for this question.

Question: A vessel of 4 m3 contains an oil which weighs 30 kN. The specific weight of the oil is
[A].

4.5 kN/m3

[B].

6 kN/m3

[C].

7.5 kN/m3

[D].

10 kN/m3

Answer: Option C

Explanation:

No answer description available for this question.

Question: Euler’s number is the ratio of __________ force to pressure force.
[A].

inertia

[B].

gravity

[C].

viscous

Answer: Option A

Explanation:

No answer description available for this question.

Question: Froude’s number is the ratio of inertia force to
[A].

pressure force

[B].

elastic force

[C].

gravity force

[D].

surface tension force

Answer: Option C

Explanation:

No answer description available for this question.

Question: A point, in a compressible flow where the velocity of fluid is zero, is called
[A].

critical point

[B].

vena contracta

[C].

stagnation point

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A flow is called hyper-sonic, if the Mach number is
[A].

less than unity

[B].

unity

[C].

between 1 and 6

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.