chemical engineering MCQs – Page 218

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
4341. Dissolving a solute in a solvent does not change its________________?
comments icon0
A. None of these

B. Viscosity

C. Specific heat

D. Vapour pressure

4342. Cox chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the_____________?
comments icon0

A. Log (temperature) vs. log (vapor pressure)

B. Vapor pressure vs. log (temperature)

C. Temperature vs. log (vapor pressure)
4343. In panel test for spalling resistance, the average face temperature of panel assembly is maintained at _____________ C for 24 hours?
comments icon0

A. 700

B. 1000

C. 1600

D. 2000

4344. Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?
comments icon0

A. ?d

B. d

C. d1.5

D. d2
4345. Pick out the correct statement?
comments icon0
A. Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding

B. It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling

C. Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing

D. Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes

4346. A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is_________________?
comments icon0

A. N2O3

B. None of these

C. N2O4

D. N2O5
4347. Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
comments icon0

A. CO attack

B. Thermal spalling

C. Fusion under load

D. Slag attack

4348. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on treatment with dilute H2SO4will be _____________ gm?
comments icon0

A. 65

B. 6.5

C. 0.65

D. 0.065

4349. Hot metal runner in blast furnace are lined with ______________ bricks?
comments icon0
A. Fireclay

B. Magnesite

C. Silica

D. Carborundum

4350. The number of H+ in 1 c.c solution of pH 13 is__________________?
comments icon0
A. 6.023 107

B. 6.023 1013

C. 1013

D. 6.023 1010

4351. What is the steam economy in case of a single effect evaporator system ?
comments icon0

A. > 1

B. 1

C. 0.1

D. < 1
4352. The reaction A + B ? C has been conducted in a reactor as shown below. The numbers of balances (material) that can be made around the reactor are________________?
comments icon0

A. 2

B. 3

C. 1

D. 4

4353. Unit of power is____________________?
comments icon0

A. Joule

B. Watt

C. Joule/Second

D. Both B. & C.
4354. Choose the correct equation ?
comments icon0

A. Nu = (Pr) (St)

B. Nu = (Re) (Pr)

C. Nu = (Re) (Pr) (Gz)

D. Nu = (Re) (Pr) (St)
4355. 1 bar is almost equal to __________________________ atmosphere?
comments icon0

A. 1000

B. 10

C. 1

D. 100

4356. With increase in the alumina content, the refractoriness of high alumina refractories_________________?
comments icon0

A. Decreases

B. Increases

C. Remain same

D. May increase or decrease

4357. With rise in temperature, the solubility of ammonia in water at a fixed pressure__________________?
comments icon0
A. Decreases

B. Increases

C. Remains unchanged

D. Increases exponentially

4358. Pick out the wrong statement pertaining to Horton sphere used for the storage of liquid ammonia ?
comments icon0
A. Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2

B. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

C. Thickness of spherical shell is half that of the cylindrical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape; hence insulation required is less

D. Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2

4359. For evaporation of viscous solution in a multiple effect evaporator, the preferred feeding scheme is _________________?
comments icon0
A. Backward

B. Parallel

C. Forward

D. None of these

4360. A saturated vapor on being compressed would___________________?
comments icon0

A. Condense

B. Form wet steam

C. Both A. & B.

D. Neither A. nor B.