Chemical Engineering MCQs with explanations

Question 1

Pick out the wrong statement?

Accepted Answer

Calorific value of natural gas is more than that of LPG

Question 2

Movement of pipeline caused by thermal expansion is taken care by providing ________?

Accepted Answer

All A., B. and C.

Question 3

Flame photometry is used for the determination of compositional analysis of________?

Accepted Answer

Alkali metals

Question 4

Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about ________ minutes?

Accepted Answer

4

Question 5

Vulcanisation of raw rubber makes it________?

Accepted Answer

Less elastic

Question 6

In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)?

Accepted Answer

8.89

Question 7

Phthalic anhydride is produced by the oxidation of ________?

Accepted Answer

Benzene

Question 8

Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton’s law of viscosity. (II) Newton’s second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary?

Accepted Answer

II, III, V

Question 9

Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty?

Accepted Answer

Bubble cap tower

Question 10

Which of the following is the lightest of engineering metals?

Accepted Answer

Magnesium

Chemical Engineering MCQs with Explanations