Chemical Engineering

Question: With increase in the shear rate, the apparent viscosity of pseudoplastic fluids
[A].

increases

[B].

decreases

[C].

remains same

[D].

may increase or decrease; depends on the magnitude of shear rate

Answer: Option B

Explanation:

No answer description available for this question.

Question: With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the
[A].

velocity increases

[B].

pressure decreases

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
[A].

V/Vmax = (x/r)1/7

[B].

V/Vmax = (r/x)1/7

[C].

V/Vmax = (x.r)1/7

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Drag co-efficient in hindered settling is __________ that in free settling.
[A].

less than

[B].

equal to

[C].

not necessarily greater than

[D].

always greater than

Answer: Option D

Explanation:

No answer description available for this question.

Question: Minimum fluidisation velocity for a specific system depends upon the
[A].

particle size.

[B].

fluid viscosity.

[C].

density of both the particle & the fluid.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity
[A].

widens

[B].

squeezes

[C].

does not change

[D].

unpredictable from the data

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a/an __________ , the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure.
[A].

rotameter

[B].

pitot tube

[C].

venturimeter

[D].

flow nozzle

Answer: Option B

Explanation:

No answer description available for this question.

Question: A differential pressure cell is used for
[A].

measuring small pressure difference in gases.

[B].

measuring small pressure difference in liquids.

[C].

remote recording of pressure difference.

[D].

measuring the difference of the impact & the static pressure.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In hindered settling, the particles are
[A].

placed farther from the wall.

[B].

not affected by other particles and the wall.

[C].

near each other,

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Dimension of absolute viscosity is
[A].

ML-1T-1

[B].

MLT-1

[C].

ML-1T

[D].

MLT

Answer: Option A

Explanation:

No answer description available for this question.