Chemical Engineering MCQs with explanations

Question 1

Prandtl number for water at 20°C is about ________?

Accepted Answer

7

Question 2

The most suitable equipment for the transportation of 200 mesh size particles is a ________?

Accepted Answer

Pneumatic conveyor

Question 3

If a solid is compressed adiabatically in its elastic range, its ________ remains constant?

Accepted Answer

Entropy

Question 4

A chemical reaction occurs when the energy of the reacting molecules is ________ the activation energy of the reaction?

Accepted Answer

Equal to or more than

Question 5

Roasting of metallurgical ores is done mainly to ________?

Accepted Answer

Remove arsenic & sulphur

Question 6

Operating velocity in a packed tower is usually ________ the flooding velocity?

Accepted Answer

Half

Question 7

Furnace atmosphere for softening temperature determination of refractories (in which Seger Cones are placed) should be ________?

Accepted Answer

Either A. or B.

Question 8

The reaction rate constants at two different temperatures T1 and T2 are related by ________?

Accepted Answer

ln (k2/k1) = (E/R) (1/T1 – 1/T2)

Question 9

Pressure drop per tray in the atmospheric distillation column is about ________ psi?

Accepted Answer

0.07 – 0.12

Question 10

If xD = overhead product molal composition and RD = reflux ratio, then slope and intercept of the operating line for rectifying section are respectively?

Accepted Answer

[RD/(RD + 1)], [xD/(xD + 1)]

Chemical Engineering MCQs with Explanations