Chemical Engineering MCQs

A. Multiple effect evaporator
B. Mechanical draft cooling tower
C. Rotary dryer
D. Rotating disc contactor

A. Recovery of tannis from the tree barks and woods
B. Leaching sodium nitrate from chilean nitrate bearing rock
C. Both a. and b.
D. Neither a. nor b.

A. 2.09 × 10-4
B. 2.09 × 10-5
C. 2.09 × 10-9
D. 2.09 × 10-12

A. Wetted wall
B. Sieve/perforated tray
C. Bubble cap
D. Packed

A. Condenser and reboiler loads are the same in both the cases
B. Reboiler load is the same in both the cases but condenser load is higher in case (ii)
C. Condenser load is the same in both the cases but reboiler load is higher in case (ii)
D. Both condenser and reboiler loads are higher in case (ii) as compared to case (i)

A. 0.25
B. 2.5
C. 1.25
D. 0.0025

A. Yes
B. No
C. Yes; but height of cooling tower will be prohibitively high
D. Yes; but the air flow rate should be excessively high

A. Molal diffusivity
B. Volumetric co-efficient
C. Mass transfer co-efficient
D. None of these

A. P = p
B. P >>p
C. P < p
D. P << p

A. Straight
B. Parallel
C. Both a. & b.
D. Neither a. nor b.