Chemical Engineering Basics MCQs

Question 1

A reduction process is accompanied with increase in the

Accepted Answer

Number of electrons

Answer

Oxidation number

Answer

Both A & B

Answer

Neither A nor B

Question 2

Ceramic compounds as compared to metallic compounds

Accepted Answer

Have higher melting temperature

Answer

Crystallise faster

Answer

Resist greater tensile stress at room temperature

Answer

Are better conductor of electricity at higher temperature

Question 3

Cast iron compared to steel is better in

Accepted Answer

Fluidity & castability

Answer

Ductility

Answer

Strength

Answer

Malleability

Question 4

With increase in temperature, the electrical conductivity of semiconductors

Accepted Answer

Increases

Answer

Decreases

Answer

Remain constant

Answer

Either A or B, depends on the type of semi-conductor

Question 5

Constituents of stellite are

Accepted Answer

Cobalt, chromium & tungsten

Answer

Zinc, copper & nickel

Answer

Zinc, aluminium & nickel

Answer

Nickel, cobalt & vanadium

Question 6

__________ is not used as a material of construction in thermocouples.

Accepted Answer

Duralumin

Answer

Alumel

Answer

Rhodium

Answer

Constantan

Question 7

Ganister contains maximum percentage of

Accepted Answer

SiO2

Answer

FeO

Answer

MgO

Answer

MnO2

Question 8

In BOF, desiliconisation is a first order reaction. So the silicon content of the metal decreases

Accepted Answer

Linearly with time

Answer

Exponentially with time

Answer

Logarithmically with time

Answer

In proportion to the square root of time

Question 9

Corrosion is

Accepted Answer

A chemical phenomenon

Answer

A physical phenomenon

Answer

Same as erosion

Answer

An uncontrollable phenomenon