Chemical Engineering MCQs with explanations

Question 1

The pressure (kg/cm2) and temperature (°C) maintained in electrical desalters for crude oil are respectively________?

Accepted Answer

1 and 200

Question 2

Salt cake is chemically represented by________?

Accepted Answer

Na2SO4

Question 3

Pick out the Hagen-Poiseuille‟s equation?

Accepted Answer

Δp = 32 (μLV/gc. D2)

Question 4

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow?

Accepted Answer

Water flow in the suction and discharge pipe of a reciprocating pump

Question 5

Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will________?

Accepted Answer

Increase

Question 6

Chemical engineering thermodynamics is concerned with the ________ in/of chemical processes?

Accepted Answer

Energy transformation from one form to another

Question 7

Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is________?

Accepted Answer

kW. sec/kg

Question 8

Hardening of steel is not possible unless it is heated ________ critical point?

Accepted Answer

Above the lowest

Question 9

For the reaction, A + B → 2B + C,________?

Accepted Answer

rA = rB

Question 10

The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called________?

Accepted Answer

Elutriation or elution

Chemical Engineering MCQs with Explanations