Chemical Engineering Basics MCQs

Question 1

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Increases to a maximum before decreasing

Question 2

Nitriding of a steel part does not increase its

Accepted Answer

Grain size

Answer

Fatigue limit

Answer

Surface hardness

Answer

Wear resistance

Question 3

Nickel and __________ are the alloying element added in steel to increase its toughness.

Accepted Answer

Silicon

Answer

Molybdenum

Answer

Chromium

Answer

Vanadium

Question 4

The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong

Accepted Answer

Base and strong acid

Answer

Base and weak acid

Answer

Acid and weak base

Answer

None of these

Question 5

__________ has a negative co-efficient of linear expansion.

Accepted Answer

Copper

Answer

Iron

Answer

Rubber

Answer

Nickel

Question 6

__________ cycle is the most efficient thermodynamic cycle.

Accepted Answer

Carnot

Answer

Diesel

Answer

Otto

Answer

Rankine

Question 7

The burnout heat flux in the nucleate boiling regime is not a function of the

Accepted Answer

Vapour density

Answer

Liquid density

Answer

Temperature difference

Answer

Heat of evaporation

Question 8

The cost of providing service in a queing system decreases with the

Accepted Answer

Increased mean time in the queue

Answer

Increased arrival rate

Answer

Decreased mean time in the queue

Answer

Decreased arrival rate

Question 9

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

Accepted Answer

Petrol

Answer

LPG

Answer

Light hydrocarbon gases (e.g. butane or propane)

Answer

None of these