Packed towers
Plate towers
Spray towers
Wetted wall columns
✅ The correct answer is option D.
Chemical Engineering MCQs
The value of L/mG ratio for economical absorption operation ranges from
0.5 to 0.8
0.8 to 1.2
1.25 to 2.0
2.5 to 3.5
✅ The correct answer is option C.
Which of the following increases during evaporative cooling process with recirculated water supply?
Wet bulb temperature
Relative humidity
Partial pressure of vapour
Both B and C
✅ The correct answer is option D.
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.
Across
Above
Both A & B
Neither A nor B
✅ The correct answer is option C.
The cooling effect in a cooling tower can be speeded up by
Increasing the air velocity and area of exposed wet surface
Reducing the barometric pressure
Reducing the humidity of the air
All of the above
✅ The correct answer is option D.
Which of the following provides maximum contact surface for a liquid-vapour system?
Packed tower
Bubble-cap plate column
Seive-plate column
Wetted wall column
✅ The correct answer is option A.
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?
Dry bulb temperature
Dew point
Wet bulb temperature
None of these
✅ The correct answer is option C.
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of
1.5
-0.6
-1.5
0.6
✅ The correct answer is option C.
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )
(1 + Ro) = Ro/Ri
(1 – Ro) = Ro/Ri
(1 + Ri) = Ro/Ri
(1 – Ri) = Ro/Ri
✅ The correct answer is option A.
In a counter-current liquid extractor
Both liquids flow at fixed rate
Both liquids can have any desired flow rate
Only one of the liquids may be pumped at any desired rate
Liquid’s flow rate depends upon the temperature and pressure
✅ The correct answer is option C.