Chemical Engineering Basics MCQs

Question 1

Machinability of hard alloys & tool steels is improved by

Accepted Answer

Annealing

Answer

Spherodising

Answer

Tempering

Answer

Normalising

Question 2

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

Accepted Answer

400 - 700

Answer

60 - 100

Answer

1200 -1500

Answer

2000 - 2300

Question 3

Gas turbine normally employs a constant __________ cycle.

Accepted Answer

Pressure

Answer

Temperature

Answer

Volume

Answer

None of these

Question 4

The substance used as a smoke screen in warfare is

Accepted Answer

SiCl4

Answer

C2H2

Answer

P2O5

Answer

PCl5

Question 5

Old cycle handles are coated with nickel using

Accepted Answer

Spray coating

Answer

Cementation

Answer

Galvanising process

Answer

Tinning process

Question 6

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Accepted Answer

Depends on the choice of the standard state

Answer

Is always less than 1

Answer

Is always greater than 1

Answer

Can be 5

Question 7

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

Accepted Answer

Breeder

Answer

Critical

Answer

Fertile

Answer

Heterogenous

Question 8

Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher

Accepted Answer

Machinability

Answer

Ductility

Answer

Impact strength

Answer

Melting point

Question 9

A common disinfectant used in village wells for disinfection of water is

Accepted Answer

Potassium permanganate

Answer

Free chlorine

Answer

Bromine

Answer

Iodine