chemical engineering MCQs – Page 120

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 Review each marked answer and report any item that may be outdated or unclear.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

2381. Which of the following may prove unsuitable for filtering volatile liquids ?
0

A. Pressure filter

B. Vacuum filter

C. Gravity filter

D. Centrifugal filter

2382. Vacuum is applied in _______________ zone, in case of a general type continuous rotary drum vacuum filter?
0

A. Drying

B. All A., B. & C.

C. Filtering

D. Washing

2383. Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor?
0

A. Drag

B. Screw

C. Ribbon

D. Slat

2384. Rittingers crushing law states that_____________________?
0

A. For a given machine and feed, crushing efficiency is dependent on the size of the feed &

B. Work required to form a particle of any size is proportional to the square of the surface to

C. Work required to form a particle of a particular size is proportional to the square root of the

D. face to volume ratio of the product

E. Work required in crushing is proportional to the new surface created

F. ume ratio of the product

2385. Which of the following is a continuous filter ?
0

A. Plate and frame filter

B. None of these

C. Shell and leaf filter

D. Cartridge filter

2386. _____________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid ?
0

A. Bubble point

B. Dew point

C. Dry bulb temperature

D. Wet bulb temperature

2387. Gyratory crushers compared to the reciprocating jaw crushers__________________?
0

A. Have greater capacity per unit of discharge area

B. Crush intermittently

C. Have less steady power consumption

D. Are less suitable for coarse materials

2388. Critical humidity of a solid salt means the humidity_____________________?
0

A. Above which it will always become damp

B. Below which it will always stay dry

C. Both A. and B.

D. Above Which it will always become dry and below which it will always stay damp

2389. Physical absorption is__________________?
0

A. An irreversible phenomenon

B. A reversible phenomenon

C. Accompanied by evolution of heat

D. Both B. and C.

2390. For coarse reduction of hard solids, use ____________________?
0

A. Attrition

B. Impact

C. Cutting

D. Compression

2391. For contacting a highly soluble gas with a liquid ____________________?
0

A. Bubble the gas through liquid

B. Either A. or B. would suffice

C. Spray the liquid on gas stream

D. None of these

2392. In a counter-current extractor, as the axial mixing increases, the extraction efficiency______________________?
0

A. Decreases

B. Remains unchanged

C. Increases

D. Depends on the pressure of the system

2393. _______________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals?
0

A. Concentration ratio

B. Separation efficiency

C. Selectivity index

D. None of these

2394. Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?
0

A. Toothed roll

B. Blake jaw

C. None of these

D. Gyratory

2395. _____________ mills are termed as impactors?
0

A. Rolling-compression

B. None of these

C. Cage

D. Hammer

2396. Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?
0

A. All A., B. and C.

B. Fluid energy mill

C. Micronizer

D. Jet mills

2397. Bond crushing law_________________?
0

A. the square root of the volume to surface ratio of the product

B. Calls for relatively less energy for the smaller product particles, than does the Rittinger law

C. States that the work required for the crushing is proportional to the new surface created

D. States that the work required to form particle of any size from very large feed is proportional

E. Is less realistic in estimating the power requirements of commercial crushers

2398. Only small amount of evaporation of water produces large cooling effects because of its___________________?
0

A. Large latent heat

B. Small latent heat

C. None of these

D. Low viscosity

2399. Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?
0

A. 1

B. 0.5

C. 1.34

D. 4.34

2400. Width and speed of a conveyor belt depends upon the ______________ of the material?
0

A. Lump size

B. Bulk density

C. Both A. & B.

D. Neither A. nor B.

Previous Next

Showing 2381 to 2400 of 8709 mcqs