Chemical Engineering Basics MCQs

Question 1

Cast iron has the unique property of high

Accepted Answer

Damping characteristics

Answer

Ductility

Answer

Hardness

Answer

Malleability

Question 2

Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?

Accepted Answer

Critical temperature

Answer

Recrystallisation temperature

Answer

Phase transformation temperature

Answer

Transition temperature

Question 3

Pick out the wrong statement.

Accepted Answer

Phosphorous can be easily recovered in the iron blast furnace

Answer

Cold cracking of a weld is due to the presence of hydrogen gas in the weld

Answer

True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively

Answer

High residual stress at the surface is beneficial for fatigue properties of a material

Question 4

The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.

Accepted Answer

Ultimate

Answer

Yield

Answer

Proof

Answer

None of these

Question 5

When the wavelength of incident X-rays increases, the angle of diffraction

Accepted Answer

Decreases

Answer

Increases

Answer

Remains constant

Answer

Shows no systematic variation

Question 6

Fibre glass is a composite material of

Accepted Answer

Glass fibre in a polymer matrix

Answer

Glass fibre in a metallic matrix

Answer

Polymer fibre in a glassy matrix

Answer

Both B & C

Question 7

In connection with corrosion of metals, passivation is the process that

Accepted Answer

Inhibits further deterioration

Answer

Intensifies deterioration

Answer

Changes the composition of the metal

Answer

None of these

Question 8

Most of the phosphorous present in the blast furnace burden enters into

Accepted Answer

Hot metal

Answer

Flue gases

Answer

Slag

Answer

Refractory lining

Question 9

Basicity [%Cao + %MgO/% SiO2) of the slag in Indian blast furnace is in the range of

Accepted Answer

1.1 - 1.4

Answer

0.7 - 1.0

Answer

1.5 - 1.8

Answer

2.0 - 2.5