Chemical Engineering Basics MCQs

Question 1

Coating provided on the electrodes used in the arc welding is not expected to

Accepted Answer

Prevent electrode from contamination

Answer

Add alloying elements

Answer

Stabilise the arc

Answer

Provide protective atmosphere to weld

Question 2

Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?

Accepted Answer

Shore sceleroscope test

Answer

Vicker's hardness test

Answer

Brinell hardness test

Answer

Rockwell hardness test

Question 3

The capital & running costs of similar machines having unequal service life can be compared by the __________ method.

Accepted Answer

Capitalised cost

Answer

Equivalant annual cost

Answer

Rate of return

Answer

Present net worth

Question 4

Carburettor in a spark ignition engine is used to

Accepted Answer

Mix air-fuel in the desired ratio

Answer

Maintain a constant speed at varying loads

Answer

Adjust the stroke length

Answer

Increase the compression ratio

Question 5

A spark ignition petrol engine has

Accepted Answer

Both A & B

Answer

Throttle valve

Answer

Carburettor

Answer

Neither A nor B

Question 6

__________ joint is mostly used for joining pipes carrying water at low pressure.

Accepted Answer

Socket

Answer

Nipple

Answer

Union

Answer

Bell and spigot

Question 7

Quartz is a __________ material.

Accepted Answer

Piezoelectric

Answer

Diamagnetic

Answer

Ferromagnetic

Answer

Ferroelectric

Question 8

In cold working of metal as compared to its hot working

Accepted Answer

Yield stress, hardness and fatigue strength is not at all affected

Answer

Cracks and blow holes are eliminated

Answer

Ductility and impact strength improves

Answer

Appreciable strain hardening is produced

Question 9

Cast iron has the unique property of high

Accepted Answer

Damping characteristics

Answer

Ductility

Answer

Hardness

Answer

Malleability