chemical engineering MCQs – Page 134

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 Review each marked answer and report any item that may be outdated or unclear.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

2661. For spheres, the specific surface shape factor is given by___________________?
0

A. A/V

B. AD/V

C. ?(AD/V)

D. D/V

2662. Trommels employ _____________ for screening of materials?
0

A. None of these

B. Fibrous cloth

C. Punched plate

D. Woven wire screen

2663. Ore concentration by jigging is based on the difference in the ______________ of the particles?
0

A. None of these

B. Shape

C. Wettability

D. Specific gravities

2664. Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation ?
0

A. Toggles

B. Check plates

C. Crush shaft

D. Jaw plates

2665. _______________ mill is not used for grinding wheat into flour and for milling of cereals & other ?
0

A. Pebble

B. etable products.

C. Roller

D. Buhrstone

E. Attrition

2666. _____________ Centrifuge is normally used in sugar mills?
0

A. Tubular bowl

B. Disc-bowl

C. Perforated horizontal basket continuous

D. Suspended batch basket

2667. Participation of _______________ is involved in the occurrence of a chemical reaction?
0

A. Neutrons

B. Electrons

C. None of these

D. Protons

2668. Pick out the wrong statement ?
0

A. Gape is the greatest distance between the crushing surfaces or the jaws

B. Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy

C. The angle of nip (2?) is the angle between roll faces at the level where they will just take hold

D. a particle and draw it in the crushing zone

E. Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the

F. duct

2669. A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 ?m/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is_________________?
0

A. 0.02 ?m/s

B. 0.90 ?m/s

C. 1 ?m/s

D. 22.1 ?m/s

2670. The sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________?
0

A. 0.5

B. 0.9

C. 0.78

D. 0.6

2671. Handling of ashes and similar materials can be done best by a ______________ conveyor?
0

A. Ribbon

B. Belt

C. Flight

D. Drag or slat

2672. Mixer used for rubber compounding is__________________?
0

A. mixer-extruder

B. Pug mill

C. Banbury internal mixer

D. Muller mixer

2673. Screen capacity is proportional to (where, S = screen aperture)____________________?
0

A. S

B. 1/S

C. ?S

D. S2

2674. Rod mills employed for grinding_________________?
0

A. Employ steel rods of 2-12 cms diameter extending over full length of the mill

B. Is useful for handling sticky materials

C. All A , B & C

D. Employ a steel shell having L/D ratio of 1.5 to 3.0

2675. In the cyclone separator used for separation of dust from dust laden gas, the gas ?
0

A. Enters the cyclone from the top

B. Is admitted tangentially at high velocity

C. Develops a helical motion inside the chamber

D. Both B. and C.

2676. The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be _______________ cms?
0

A. 8

B. 2

C. 12

D. 20

2677. In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing) ?
0

A. Peclet

B. Weber

C. Brinkman

D. Schmidt

2678. Additives used for promoting the flocculation of particles is a/an _____________________?
0

A. Electrolyte

B. Surface active agent

C. Both A. & B.

D. Neither A. nor B.

2679. 200 mesh sieve size corresponds to _____________ microns?
0

A. 74

B. 200

C. 24

D. 154

2680. For classification of potable (drinking) water, we use a _______________ filter?
0

A. Rotary vacuum

B. Vacuum leaf

C. Plate and frame

D. Gravity sand

Previous Next

Showing 2661 to 2680 of 8709 mcqs