chemical engineering MCQs – Page 22

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 Review each marked answer and report any item that may be outdated or unclear.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
421. Wood is a/an ______________ material ?
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A. Amorphous

B. Homogeneous

C. Cellular

D. Granular

422. Speisses is a mixture of the following ?
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A. Antimonides of heavy metals

B. Arsenides & antimonides of heavy metals

C. Arsenides of heavy metals

D. Iron, cobalt and nickel

423. Ammonia leakage in the refrigeration system is detected by_________________?
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A. Sulphur stick, which on detection gives white smoke

B. Using chemical reagents

C. Soap solution

D. Its smell

424. Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ?
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A. 15-Oct

B. 103

C. 1015

D. 10-3
425. According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to _______________ times the yield stress ?
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A. ?3/2

B. 0.5

C. 2

D. ?2

426. In extrusion of metals, which of the following statement is true ?
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A. Hollow ram is used for indirect extrusion

B. Speed of the extruded material is same as that of ram speed

C. Redundant work is a function of the die angle

D. Relative motion between the billet surface and the container wall is always present

427. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
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A. Diameter & length of the pipe

B. Temperature of hot pipe surface & that of air in the room

C. Emissivity of pipe surface

D. None of these
428. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?
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A. High vacuum

B. Zero pressure

C. 0K

D. Earths centre

429. ____________________ of hard alloy and tool steel is done to make it easily machinable ?
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A. Tempering

B. Annealing

C. Normalising

D. Case carburising

430. Dies for wire drawing are generally made of__________________?
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A. High carbon steel

B. Carbides

C. Mild steel

D. Stainless steel

431. Diamagnetic materials___________________?
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A. Are magnetised by eddy currents only

B. Are magnetised in direction opposite to the magnetic field

C. Can be magnetised in one direction only

D. Are non-magnetic and cannot be magnetised

432. Which of the following has the highest value of refractive index ?
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A. Diamond

B. Glass

C. Distilled water

D. Brine (sea water)

433. Materials having resistivity ranging from 1 to 100 ohm. cm is termed as___________________?
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A. Conductor

B. None of these

C. Insulator

D. Semi-conductor
434. Fog is an example of colloidal system of___________________?
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A. Solid dispersed in liquid

B. Solid dispersed in gas

C. Gas dispersed in liquid

D. Liquid dispersed in gas
435. Dislocations are _______________ defects?
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A. Volume

B. Point

C. Line

D. None of these

436. The product out from a cupola is called ____________________?
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A. Pig iron

B. Cast iron

C. None of these

D. Wrought iron

437. Fahrenheit and Centigrade scales have the same readings at _____________________?
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A. -55

B. -58

C. -33

D. -40
438. Runge-Kutta method is used to solve a/an __________________________?
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A. Ordinary differential equation of nth order

B. Simultaneous non-linear equation

C. None of these

D. Linear differential equation

439. Enzymes belong to the category of_____________________?
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A. Fats

B. Carbohydrates

C. Proteins

D. Vitamins

440. With increase in steam pressure, its specific volume decreases ____________________?
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A. Linearly

B. Exponentially

C. Rapidly first and then slowly

D. Slowly first and then rapidly