Chemical Engineering Basics MCQs

Question 1

Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of

Accepted Answer

Lead

Answer

Paper

Answer

Cloth

Answer

Aluminium

Question 2

Which of the following has the highest density and the lowest melting point ?

Accepted Answer

Lead

Answer

Stainless steel

Answer

Titanium

Answer

Aluminium

Question 3

Machinability of hard alloys and tool steels is improved by

Accepted Answer

Annealing

Answer

Spherodising

Answer

Tempering

Answer

Normalising

Question 4

A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

Accepted Answer

Remain unaffected

Answer

Increase

Answer

Decrease

Answer

May increase or decrease; depends on the thickness of each layer

Question 5

In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be

Accepted Answer

Radiation

Answer

Conduction

Answer

Natural convection

Answer

Forced convection

Question 6

Annealing of cast iron

Accepted Answer

Softens it to facilitate machining

Answer

Decreases the free carbon

Answer

Increases the strength

Answer

None of these

Question 7

The dimensions of Planck's constant is the same as that of the

Accepted Answer

None of these

Answer

Kinetic energy

Answer

Momentum

Answer

Electrostatic potential

Question 8

Sulphur is melted in the sulphuric acid plant most commonly by employing

Accepted Answer

Steam heater

Answer

Electrical heater

Answer

Direct fuel oil fired heater

Answer

Gas fired furnace

Question 9

With increase in carbon percentage in steel, its

Accepted Answer

Tensile strength increases

Answer

Yield stress decreases

Answer

Elongation percent increases

Answer

Impact strength increases