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‎Questiona7:-ina heat exchanger, both fluids flow alternatively through the same flow passages and hence heat transfer is intermittent.
‘AcShell and Tube
B:-Fluidised Bed
Storage Type
D-Cross Flow Type
Correct Answer:- Option-C
Question48:-Which of the following is not a classification based on construction of the heat exchanger ?
AcTubular
B:-Plate Type
C-Multipass
D-Regenerative
Correct Answer:- Option-C
Question49:-Pick out the wrong statement.
‘Asin process heat exchangers, saturated steam is preffered over the superheated steam.

BeThe maximum is the emissive power of a surface at a temperature 7, occurs at a wavelength of A_1 . If the surface temperature is halved, the maximum in the emissive power
would occur at a wavelegth of 0.5 A_1

C-When a vertical plate is heated in infinite air environmental under natural convention conditions, the velocity profile in air, normal to the plate, exhibits a maximum,

D:-A body at 925 K emits an energy of 1.42 x 10" oW/m? (a is the Stefan-Boltzman constant) in the wavelength band between 3 ym to 4 Lim. The fraction of this energy in the
total energy emitted over the entire wavelength range is equal to emissivity.

Correct Answer: Option ®
‘Question50::What is the steam consumption of an evaporator if the evaporator capacity is 30 kg/hr and the steam consumption is 45 kg/hr ?
۸36
8:70%
~)
D:-65%
Correct Answer:-Question Cancelled
Question51:-Diffusivity of a binary gas mixture is 2.83 x 107” 117 /5 at 300 K. What will be the approximate value for the diffusivity at 600 K ?
കാട
8:5.66 ടെ
ക്ട
D:-1.68 10°“ /s

Correct Answer: Option-C

Question52:~A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass
transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is,

A054
8104
೦೩24
0-೩೨4
Correct Answer:- Option-C
QuestionS3:-Find the HTU, if gas rate is 0.07 kmol/sa.m.s and Fg*a (F type mass transfer co-efficient is 0.06 kmol/cu.ms})
കവണ
2:05
0.042
0.067
Correct Answer:- Option-é

Question54:-The solubility curve for highly soluble gas in liquid