Questions and answers for exam Preparation

MCQs

Total Questions : 1628 | Page 161 of 163 pages

Question 1601. For turbine agitator, the impeller diameter is about

0.1 to 0.2 d
0.65 to 0.85 d
0.95 d
0.3 to 0.5 d

Discuss Question

Answer: Option D. -> 0.3 to 0.5 d

Question 1602. Spherical shaped pressure vessel is considered to be the most ideal, because it can

Be fabricated very easily
Be designed without wind load considerations
Withstand higher pressure for a given metallic shell thickness
Be supported very easily

Discuss Question

Answer: Option C. -> Withstand higher pressure for a given metallic shell thickness

Question 1603. In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

1.5 nth
nth
0.5 nth
(1/n)th

Discuss Question

Answer: Option D. -> (1/n)th

Question 1604. Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²
Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen
Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²
Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

Discuss Question

Answer: Option A. -> Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Question 1605. The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

Equal sized reactors are the best
Larger reactor should come first
None of these
Smaller reactor should come first

Discuss Question

Answer: Option D. -> Smaller reactor should come first

Question 1606. Larger depth of liquid on the trays of a distillation column

Leads to high tray efficiency
Results in higher pressure drop per tray
Both A & B
Neither A nor B

Discuss Question

Answer: Option C. -> Both A & B

Question 1607. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

Cither A or B; depends upon the I.D. of the pipe
Less
More
Same

Discuss Question

Answer: Option B. -> Less

Question 1608. 1.2 to 3.8 cms is the value of the

Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)
Downcomer liquid seal in case of a balanced tray design
All of these
Skirt clearance for bubble caps

Discuss Question

Answer: Option C. -> All of these

Question 1609. In a shell and tube heat exchanger, the 'tube pitch' is defined as the