Chemical Engineering Gate Yearwise 


Chemical Engineering Gate 2014 Questions with Answer

Ques 53 GATE 2014

A spherical storage tank is quarter-filled with toluene. The diameter of the vent at the top of the tank is 1/20th of the diameter of the vessel. Under the steady state condition, the diffusive flux of toluene vapor is largest at

A

the surface of the liquid

B

the mid-plane of the vessel

C

the vent

D

a distance 20 times the diameter of the vent away from the vent


(c) is the correct answer.

Ques 54 GATE 2014

Assuming the mass transfer coefficients in the gas and the liquid phases are comparable, the absorption of CO2 from reformer gas (CO2+H2) into an aqueous solution of diethanolamine is controlled by

A

gas phase resistance

B

liquid phase resistance

C

both gas and liquid phase resistances

D

composition of the reformer gas


(a) is the correct answer.

Ques 55 GATE 2014

Which ONE of the following statements is CORRECT for the surface renewal theory?

A

Mass transfer takes place at steady state

B

Mass transfer takes place at unsteady state

C

Contact time is same for all the liquid elements

D

Mass transfer depends only on the film resistance


(b) is the correct answer.

Ques 56 GATE 2014

Steam economy of a multiple effect evaporator system is defined as

A

kilogram of steam used per hour

B

kilogram of steam consumed in all the effects for each kilogram of steam fed

C

kilogram of steam used in all the effects for each kilogram of water vaporized per hour

D

kilogram of water vaporized from all the effects for each kilogram of steam fed to the first effect


(d) is the correct answer.

Ques 57 GATE 2014

A spherical ball of benzoic acid (diameter = 1.5 cm) is submerged in a pool of still water. The solubility and diffusivity of benzoic acid in water are 0.03 kmol/m3 and 1.25×10-9m2/s respectively. Sherwood number is given as Sh=2.0+0.6 Re0.5Sc0.33. The initial rate of dissolution (in kmol/s) of benzoic acid approximately is

A

3.54×10-11

B

3.54×10-12

C

3.54×10-13

D

3.54×10-14


(b) is the correct answer.

Ques 58 GATE 2014

A wet solid of 100 kg is dried from a moisture content of 40 wt% to 10 wt%. The critical moisture content is 15 wt% and the equilibrium moisture content is negligible. All moisture contents are on dry basis. The falling rate is considered to be linear. It takes 5 hours to dry the material in the constant rate period. The duration (in hours) of the falling rate period is


(1.2) is the correct answer.

Ques 59 GATE 2014

A binary distillation column is operating with a mixed feed containing 20 mol% vapour. If the feed quality is changed to 80 mol% vapour, the change in the slope of the q-line is


(3.7) is the correct answer.

Ques 60 GATE 2014

In order to produce fine solid particles between 5 and 10 μm the appropriate size reducing equipment is

A

fluid energy mill

B

hammer mill

C

jaw crusher

D

smooth roll crusher


(a) is the correct answer.

Ques 61 GATE 2014

Slurries are most conveniently pumped by a

A

syringe pump

B

diaphragm pump

C

vacuum pump

D

gear pump


(b) is the correct answer.

Ques 62 GATE 2014

Match the following

A

P-III, R-II, T-IV

B

Q-V, R-II, S-III

C

P-III. Q-I, R-II, S-IV

D

Q-III, S-V, T-IV


(d) is the correct answer.

Ques 63 GATE 2014

Match the
P. Turbulence
Q. NPSH
R. Ergun equation
S. Rotameter
T. Power number
Group 2
I. Reciprocating pump
II. Packed bed
III. Fluctuating velocity
IV. Impeller
V. Vena contracta

A

P-III, R-II, T-IV

B

Q-V, R-II, S-III

C

P-III, Q-I, R-II, S-IV

D

Q-III, S-V, T-IV


(a) is the correct answer.

Ques 64 GATE 2014

A cash flow of Rs. 12,000 per year is received at the end of each year (uniform periodic payment) for 7 consecutive years. The rate of interest is 9% per year compounded annually. The present worth (in Rs.) of such cash flow at time zero is


(60500) is the correct answer.

Ques 65 GATE 2014

A polymer plant with a production capacity of 10,000 tons per year has an overall yield of 70%, on mass basis (kg of product per kg of raw material). The raw material costs Rs. 50,000 per ton. A process modification is proposed to increase the overall yield to 75% with an investment of Rs. 12.5 crore. In how many years can the invested amount be recovered with the additional profit?


(2.6) is the correct answer.

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