Process Equipment And Plant Design(Chemical Engineering ) Questions and Answers
Question 1. Value of Peclet number = 0, is the representative of
Laminar flow
Complete back mixing
Plug flow
Eddy diffusivity = 0
Explanation:-
Answer: Option B. -> Complete back mixing
Question 2. In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.
Less than
1.25-1.50 times
2.5 times
One-fourth of
Explanation:-
Answer: Option B. -> 1.25-1.50 times
Question 3. Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
1/8 and 1/64
1/64 and 1/8
1/2 and 8
1/2 and 5
Explanation:-
Answer: Option A. -> 1/8 and 1/64
Question 4. Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.
It is unsuitable for concentrating those liquids, which form a scale or deposit salt
It is suitable for process, in which the final product is a liquor instead of solid
Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres
Liquor flows inside the tube, while the steam is outside submerging the tube
Explanation:-
Answer: Option D. -> Liquor flows inside the tube, while the steam is outside submerging the tube
Question 5. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.
5
15
7.5
50
Explanation:-
Answer: Option B. -> 15
Question 6. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by __________ times the hole diameter.
Two
Five
Ten
Twenty
Explanation:-
Answer: Option A. -> Two
Question 7. Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.
1.5 to 2
2.5 to 5
5 to 10
10 to 15
Explanation:-
Answer: Option B. -> 2.5 to 5
Question 8. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.
1 to 1.5
2.5 to 3.5
4 to 5
6 to 8
Explanation:-
Answer: Option A. -> 1 to 1.5
Question 9. In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
l/5th
l/15th
l/30th
l/50th
Explanation:-
Answer: Option B. -> l/15th
Question 10. Baffle width is normally taken as __________ times the tank diameter.
