Chemical Engineering Basics MCQs

Question 1

__________ of hard alloy and tool steel is done to make it easily machinable.

Accepted Answer

Tempering

Answer

Case carburising

Answer

Normalising

Answer

Annealing

Question 2

Ultimate strength in tension as compared to that in shear for steel is

Accepted Answer

One and half times

Answer

Half

Answer

One third

Answer

One fourth

Question 3

The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is

Accepted Answer

Radiation

Answer

Conduction

Answer

Convection

Answer

Both A & B

Question 4

Sub zero treatment of steel is done to

Accepted Answer

Reduce the retained austenite in hardened steel

Answer

Suppress martensite transformation

Answer

Enhance its working performance in sub zero atmosphere

Answer

Induce temper brittleness after its hardening

Question 5

__________ can replace tungsten in high speed steel.

Accepted Answer

Molybdenum

Answer

Chromium

Answer

Vanadium

Answer

Cobalt

Question 6

'Flare tower' used in industry is meant for

Accepted Answer

Venting off (after burning) the excess inflammable/toxic gases at high pressure

Answer

Absorbing the pollutant gases from the furnace exhaust

Answer

Cooling of furnace exhaust gases

Answer

None of these

Question 7

A jig is used while __________ a hole.

Accepted Answer

Drilling

Answer

Boring

Answer

Counter boring

Answer

Enlarging

Question 8

Which of the following heat treatment processes is usually applied to castings ?

Accepted Answer

Carburising

Answer

Tempering

Answer

Annealing

Answer

Normalising

Question 9

Boiler draught of 10 mm water column is equivalent to

Accepted Answer

10 kgf/m2

Answer

1 kgf/m2

Answer

10 kgf/mm2

Answer

1 kgf/mm2