Questions and answers for exam Preparation

MCQs

Total Questions : 1628 | Page 21 of 163 pages

Question 201. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a

Clearance of 25-75 mm
Cap pitch of 1.3-2 times the cap diameter
Either A or B
Neither A nor B

Discuss Question

Answer: Option C. -> Either A or B

Question 202. When one of the fluids is highly corrosive and has fouling tendency, it should

Preferably flow inside the tube for its easier internal cleaning
Perferably flow outside the tube
Flow at a very slow velocity
Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current

Discuss Question

Answer: Option A. -> Preferably flow inside the tube for its easier internal cleaning

Question 203. Rivets are generally specified by the

Head diameter
Shank diameter
Overall length
None of these

Discuss Question

Answer: Option B. -> Shank diameter

Question 204. Floating head heat exchangers are used for the

Heat transfer between corrosive fluids
Cases where temperature difference between the shell and the tubes is more (>50°C)
Co-current heat transfer systems
Counter-current heat transfer systems

Discuss Question

Answer: Option B. -> Cases where temperature difference between the shell and the tubes is more (>50°C)

Question 205. Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is

More
Less
Same
More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein

Discuss Question

Answer: Option B. -> Less

Question 206. The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

Discuss Question

Answer: Option C. -> 4

Question 207. Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?

Segmental baffle
Flat plate extending across the wall
Disk type baffle
Helical type baffle

Discuss Question

Answer: Option B. -> Flat plate extending across the wall

Question 208. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

Relative volatility is close to one (e.g., separation of close boiling isomers)
Feed is not at its bubble point
Number of equilibrium stages in only stripping section is to be calculated
Number of equilibrium stages required is likely to be very small

Discuss Question

Answer: Option A. -> Relative volatility is close to one (e.g., separation of close boiling isomers)

Question 209. Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the

Practical limit reached, due to low heat transfer rate because of inadequate temperature difference
Economic limit reached, when the plant cost exceeds the saving of steam
Both A & B
Neither A nor B

Discuss Question

Answer: Option C. -> Both A & B

Question 210. Pick out the wrong statement

For all the cylindrical process vessels operating above atmospheric pressure, formed heads are used for closing the vessel
Fouling factor of river water is less than that of sea water
Risers provided in bubble cap trays in the distillation column facilitate the flow of both liquid and vapor
Both B and C

Discuss Question

Answer: Option D. -> Both B and C