Chemical Engineering Basics MCQs

Question 1

To improve the machinability of steel, it is generally subjected to

Accepted Answer

Spherodising

Answer

Tempering

Answer

Normalising

Answer

Annealing

Question 2

Out of the following, the most ductile material is

Accepted Answer

Mild steel

Answer

Copper

Answer

Nickel

Answer

Aluminium

Question 3

With increase in temperature, the surface tension of water

Accepted Answer

Decreases

Answer

Increases

Answer

Remains constant

Answer

Increases linearly

Question 4

Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

Accepted Answer

Both (B) and (C)

Answer

A1 is more alkaline than solution A2

Answer

A1 is highly acidic

Answer

A2 is very slightly acidic

Question 5

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Accepted Answer

Patenting

Answer

Full annealing

Answer

Bright annealing

Answer

None of these

Question 6

Compression ratio of an I.C. engine is the ratio of the

Accepted Answer

Volume of air in cylinder before compression to that after compression

Answer

Clearance volume to the volume swept by piston per stroke

Answer

Pressure after compression to that before compression

Answer

None of these

Question 7

Lead is added to 60:40 brass primarily to improve

Accepted Answer

Machinability

Answer

Corrosion resistance

Answer

Fluidity

Answer

Strength

Question 8

Specific __________ is a dimensionless quantity.

Accepted Answer

None of these

Answer

Heat

Answer

Humidity

Answer

Weight

Question 9

The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

Accepted Answer

Less than

Answer

Equal to

Answer

Greater than

Answer

Either A, B or C; depends on the size of atom