Chemical Engineering

Question: Location of vena-contracta in an orificemeter does not depend upon the
[A].

type of orifice.

[B].

density, viscosity & compressibility of the fluid.

[C].

ratio of pipe diameter to orifice diameter.

[D].

pipe roughness.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of
[A].

powder & grannular solids

[B].

liquids

[C].

low melting point semi-solids

[D].

all ‘a’, ‘b’ & ‘c’

Answer: Option D

Explanation:

No answer description available for this question.

Question: Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.
[A].

small differential

[B].

atmospheric

[C].

absolute

[D].

gage

Answer: Option A

Explanation:

No answer description available for this question.

Question: Cavitation occurs in a centrifugal pump when the suction pressure is
[A].

less than the vapour pressure of the liquid at that temperature.

[B].

greater than the vapour pressure of the liquid at that temperature.

[C].

equal to the vapour pressure.

[D].

equal to the developed head.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In case of a pipe exit fitted with a nozzle, the
[A].

conversion of kinetic head to pressure head is facilitated.

[B].

conversion of pressure head to kinetic head is facilitated.

[C].

power transmitted through the nozzle is maximum, when the head lost due to friction in the pipe is equal to one third of the total supply head.

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
[A].

relative roughness.

[B].

absolute roughness.

[C].

friction co-efficient for flows at equal Reynold number.

[D].

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

Answer: Option C

Explanation:

No answer description available for this question.

Question: Fluid flow in a/an __________ is an example of pressure flow.
[A].

partially filled pipeline

[B].

pipe

[C].

open channel

[D].

river.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Dean number is concerned with the
[A].

fluid-particle interaction.

[B].

fluid flow through helical pipes.

[C].

power consumption in agitated vessels.

[D].

psychrometry.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Lower BWG means __________ of the tube.
[A].

lower thickness

[B].

lower cross-section

[C].

outer diameter

[D].

inner diameter

Answer: Option B

Explanation:

No answer description available for this question.

Question: Curve III in the above diagram represents a/an
[A].

dilatent fluid

[B].

pseudo plastic fluid

[C].

ideal plastic

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.