Process Equipment and Plant Design MCQs Archives

271. In a shell and tube heat exchanger, the clearance of the tube is generally

not less than one-fourth of the tube diameter or 3/16″.

more than the tube diameter.

equal to the tube diameter.

more in case of triangular pitch as compared to the square pitch tube layout.

✅ The correct answer is option A.

272. Brass valves are usually made for pipe sizes __________ inches.

≤1

≤2

>2.5

>3.5

✅ The correct answer is option B.

273. The dust collection efficiency of a cyclone separator

decreases with increase in gas flow rate.

is inversely proportional to the mass of the dust particle.

is directly proportional to the radius of the dust particle path.

none of these.

✅ The correct answer is option D.

274. In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

2-Mar

5-Aug

Oct-15

20-25

✅ The correct answer is option B.

275. In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.

chain

diamond

zig-zag

none of these

✅ The correct answer is option B.

276. In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

180

✅ The correct answer is option B.

277. __________ liquor is best handled in a long tube vertical evaporator.

Foamy

Scaling

Viscous

Salting

✅ The correct answer is option A.

278. The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is

∞

minimum

✅ The correct answer is option B.

279. for fully open globe value may be around

300

✅ The correct answer is option D.

280. Maximum plate efficiency is achieved in case of __________ flow.

split

cross

cascade

reverse

✅ The correct answer is option B.