Chemical Engineering Basics MCQs

Question 1

Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when

Accepted Answer

All of the above

Answer

Cheap electricity is available

Answer

The precious metal content of copper is high

Answer

There is a demand for ultrapure (99.99%) electrolytic copper

Question 2

The most suitable material for a sewer for carrying storm water is

Accepted Answer

Cement concrete

Answer

Asbestos cement

Answer

Cast iron

Answer

Mild steel

Question 3

If Reynolds number is greater than 1, then the

Accepted Answer

Inertia force is larger than the viscous force

Answer

Viscous force is larger than the inertia force

Answer

Inertia force is larger than the surface tension force

Answer

Inertia force is larger than the gravitational force

Question 4

Property responsible for the talcum powder to cling to the skin is the

Accepted Answer

Adhesion

Answer

Capillary action

Answer

Cohesion

Answer

Surface tension

Question 5

Increasing the temperature of a material makes it

Accepted Answer

Softer

Answer

Harder

Answer

Tougher

Answer

Stronger

Question 6

Which of the following alloying elements is present in maximum percentage in high speed steel.

Accepted Answer

Molybdenum

Answer

Chromium

Answer

Tungsten

Answer

Vanadium

Question 7

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Accepted Answer

k

Answer

$$\frac{1}{{	ext{k}}}$$

Answer

k2

Answer

$$\frac{1}{{{{	ext{k}}^2}}}$$

Question 8

Value of a material is usually considered as a relationship between

Accepted Answer

Utility and cost

Answer

Cost and profit

Answer

Utility and appearance

Answer

Reliability and utility

Question 9

Thermal conductivity of a material does not depend upon its

Accepted Answer

All of the above

Answer

Mass

Answer

Volume

Answer

Surface area