CHEMICAL ENGINEERING | Mass Transfer

With increase in temperature, the leaching rate increases because of the

Byadmin August 29, 2022

Question: With increase in temperature, the leaching rate increases because of the
[A].

increased diffusivity.

[B].

decreased viscosity of liquid.

[C].

both (a) and (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Heat Transfer

Heat exchanger tubes are never made of

Question: Heat exchanger tubes are never made of
[A].
plain carbon steel
[B].
stainless steel
[C].
lead
[D].
copper

Answer: Option C

Explanation:

No answer description available for this question.

Read More Heat exchanger tubes are never made of
CHEMICAL ENGINEERING | Mass Transfer

Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

Question: Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are
[A].
1
[B].
8
[C].
9
[D].
10

Answer: Option C

Explanation:

No answer description available for this question.

Read More Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are
CHEMICAL ENGINEERING | Mass Transfer

Large scale drying of wheat is done in a __________ dryer.

Question: Large scale drying of wheat is done in a __________ dryer.
[A].
fluidised bed
[B].
spouted bed
[C].
tray
[D].
vacuum rotary

Answer: Option B

Explanation:

No answer description available for this question.

Read More Large scale drying of wheat is done in a __________ dryer.
CHEMICAL ENGINEERING | Chemical Engineering Basics

Oxygen cylinders used for autogenous (cutting/welding) purposes are

Question: Oxygen cylinders used for autogenous (cutting/welding) purposes are
[A].
seamless & made of steel.
[B].
heat treated before use.
[C].
made by sand casting.
[D].
welded steel cylinders.

Answer: Option A

Explanation:

No answer description available for this question.

Read More Oxygen cylinders used for autogenous (cutting/welding) purposes are
CHEMICAL ENGINEERING | Fuels and Combustion

During the carbonisation of coal

Question: During the carbonisation of coal
[A].
all tar is evolved at < 600°C.
[B].
evolution of H2 and formation of methane and aromatics occur at > 700°C.
[C].
hard semi-coke starts shrinking at 600°C.
[D].
all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Read More During the carbonisation of coal
Mass Transfer

A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture ?

A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture ?

A. The mixture exhibits an azeotrope at 101.3 kPa
B. The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and mxylene
10
C. The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10
D. The mixture contain optical isomers

Read More A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture ?

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