Chemical Engineering MCQs with explanations

Question 1

Stabilisation of gasoline (petrol) means ________?

Accepted Answer

Removal of dissolved gases from it

Question 2

Temperature measuring instruments are standardised mostly with ________ points of pure substances?

Accepted Answer

Both A. & B.

Question 3

Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is ________?

Accepted Answer

Teflon

Question 4

Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2)?

Accepted Answer

1/4

Question 5

With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)?

Accepted Answer

Increases

Question 6

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then________?

Accepted Answer

U1 = U2

Question 7

For laminar flow through a closed conduit________?

Accepted Answer

Vmax = 2Vav

Question 8

Glycerine can be obtained from ________?

Accepted Answer

Fat

Question 9

A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same________?

Accepted Answer

All a, b & c

Question 10

Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________?

Accepted Answer

58.65

Chemical Engineering MCQs with Explanations