Fluid Mechanics

Question: Cd is always __________ Cc.
[A].

greater than

[B].

less than

[C].

equal to

[D].

either more or less than

Answer: Option A

Explanation:

No answer description available for this question.

Question: Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficientCc = co-efficient of contractionCv = co-efficient of velocity)
[A].

Cd = Cc/Cv

[B].

Cd = Cc.Cv

[C].

Cd = Cv/cc

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: For an unstable equilibrium of a floating body (where, M = metacentre.)
[A].

M is above G

[B].

M is below G

[C].

M & G coincide

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively).
[A].

G is above B

[B].

B is above G

[C].

B & coincide

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Pascal’s law is valid, only when the fluid is
[A].

frictionless and at rest.

[B].

at rest.

[C].

at rest and when the frictionless fluid is in motion.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: If in a flow field, between any two points, then the flow must be
[A].

steady, incompressible, irrotational.

[B].

steady, compressible, irrotational.

[C].

steady, compressible and along a streamline.

[D].

unsteady, incompressible, irrotational.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Euler’s equation of motion is a statement expressing
[A].

conservation of mass.

[B].

conservation of energy.

[C].

Newton’s first law of motion.

[D].

Newton’s second law of motion.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A streamline is a line in flow field,
[A].

that is traced by all the fluid particles passing through a given point.

[B].

along which a fluid particle travels.

[C].

such that at every point on it, the velocity is tangential to it.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: An isentropic process is the one, in which
[A].

pv = constant

[B].

pvr = constant

[C].

pvr = constant, and process is reversible

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A Newtonion fluid is that
[A].

which follows Newton’s law of motion.

[B].

which needs a minimum shear, before it starts deforming.

[C].

for which shear & deformation are related as

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.