(1.2)3/2
(1.2)3/5
(1.2)2/3
(1.2)5/3
✅ The correct answer is option D.
Chemical Engineering MCQs
Length to diameter ratio of most rotary driers is in the range of
1 to 2
4 to 10
10 to 20
20 to 30
✅ The correct answer is option B.
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from
1.5-2.5
3.5-5.5
7.5-10.0
Oct-15
✅ The correct answer is option A.
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing
rupture diaphragm
dikes
surge chamber
none of these
✅ The correct answer is option A.
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.
1/10-1/15th
1/5-1/10th
1/20-1/30th
1/2 to 1/4th
✅ The correct answer is option A.
A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult’s Law.
positive
negative
no
none of these
✅ The correct answer is option B.
Rotary driers are most economically designed for the number of heat transfer units (HTU) from
0.01 to 1
1.5 to 2.5
5 to 10
10 to 20
✅ The correct answer is option B.
Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.
The corrosive and fouling fluid should be preferably routed through the tubes.
The viscous fluid should be routed through the shell side.
Lower flow rate fluid should be routed through the shell side.
Higher pressure fluid stream should be routed through the shell side.
✅ The correct answer is option D.
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.
2
1-Feb
4
1-Apr
✅ The correct answer is option C.
The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is
0.25
0.5
0.75
1.25
✅ The correct answer is option A.