CHEMICAL ENGINEERING

Question: In fluid flow, the boundary layer separation can not occur
[A].

in case of boundaries experiencing form drag.

[B].

at points of abrupt changes in the flow directions.

[C].

in laminar flow.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Drag is defined as the force exerted by the
[A].

fluid on the solid in a direction opposite to flow.

[B].

fluid on the solid in the direction of flow.

[C].

solid on the fluid.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )
[A].

1/T

[B].

1/T

[C].

T

[D].

T

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)
[A].

1/M

[B].

M

[C].

1/M

[D].

M

Answer: Option A

Explanation:

No answer description available for this question.

Question: Centrifugal pumps as compared to reciprocating pumps
[A].

run at a lower speed for the same discharge.

[B].

do not need priming.

[C].

deliver fluid with pulsating/fluctuating discharge.

[D].

can be run with discharge line valve closed for a short interval.

Answer: Option D

Explanation:

No answer description available for this question.

Question: The capacity of a centrifugal pump Can be increased by increasing the
[A].

impeller diameter or speed.

[B].

number of pumps and joining them in series,

[C].

number of pumps and joining them in parallel.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following relationship is valid for the equilibrium position of the float in a rotameter ?(where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float)
[A].

Df + Bf = Wf

[B].

Df = Bf + Wf

[C].

Df + Bf + Wf =0

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: The boundary layer is that part of a moving fluid, in which the fluid velocity is
[A].

affected by the fluid flow pressure.

[B].

constant.

[C].

affected by the presence of a solid boundary.

[D].

all (a), (b) and (c).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation ?A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent.D. Fluid is compressible.E. Fluid is incompressible.
[A].

A, C, D

[B].

B, D, E

[C].

A, B, E

[D].

A, D, E

Answer: Option C

Explanation:

No answer description available for this question.

Question: Bernoulli’s equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
[A].

total pressure

[B].

total energy

[C].

velocity head

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.