Chemical Engineering Basics MCQs

Question 1

Out of the following, the rays having the lowest wavelength is the

Accepted Answer

Radio waves

Answer

Ultrasonic waves

Answer

Infra red rays

Answer

X-rays

Question 2

In Newton's law of viscosity, which states that the shear stress is proportional to the __________ co-efficient of viscosity is called dynamic or absolute viscosity (where, V = velocity, $${{	ext{V}}_{	ext{g}}}$$ = velocity gradient).

Accepted Answer

Vg

Answer

V2

Answer

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

Answer

$$\frac{1}{{{{	ext{V}}_{	ext{g}}}}}$$

Question 3

Galena is an ore of

Accepted Answer

Lead

Answer

Iron

Answer

Copper

Answer

Aluminium

Question 4

Galvanic corrosion

Accepted Answer

Occurs in a bimetal couple

Answer

Occurs in highly stressed metallic parts only

Answer

Is exemplified by caustic embrittlement of boiler tubes

Answer

Is also called dezincification

Question 5

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that

Accepted Answer

Excess air has been used for combustion

Answer

Pure oxygen has been used for combustion

Answer

Nitrogen percentage in the fuel is very high

Answer

Hydrogen is not present in the fuel

Question 6

Age hardening is connected with

Accepted Answer

Duralumin

Answer

Babbit metal

Answer

Gun metal

Answer

Stainless steel

Question 7

The main charge in blast furnace is usually

Accepted Answer

Limestone, coke & iron ore

Answer

Iron ore & coke

Answer

Iron ore, coke & air

Answer

Limestone, sand & iron ore

Question 8

Heat release during phase change is observed in case of a/an

Accepted Answer

Condenser

Answer

Boiler

Answer

Evaporator

Answer

All of the above

Question 9

For dynamic strain measurement, the wheatstone bridge used is of __________ type.

Accepted Answer

Voltage sensitive deflected

Answer

Voltage sensitive null

Answer

Current sensitive deflected

Answer

None of these