Chemical Engineering MCQs with explanations

Question 1

The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge)?

Accepted Answer

(Q2 – Q1)/Q2

Question 2

The most serious manufacturing defect from fracture toughness point of view is________?

Accepted Answer

Crack

Question 3

Higher vapour pressure of gasoline indicates ________?

Accepted Answer

Neither A. nor B.

Question 4

The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas)?

Accepted Answer

√T

Question 5

In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (Atomic weight of calcium = 40)?

Accepted Answer

4480

Question 6

Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is ________?

Accepted Answer

Paraffin

Question 7

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is________?

Accepted Answer

Superheated vapour

Question 8

Average sulphur content in Indian pyrites is about ________ percent?

Accepted Answer

35

Question 9

Entropy change in case of reversible adiabatic process is________?

Accepted Answer

Zero

Question 10

In high temperature carbonisation (as compared to low temperature carbonisation) of coal________?

Accepted Answer

All A., B. and C.

Chemical Engineering MCQs with Explanations