Chemical Engineering Basics MCQs

Question 1

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

Accepted Answer

3

Answer

0.5

Answer

10

Answer

25

Question 2

On-off control

Accepted Answer

Is a two position control (fully open or fully closed) control adequate to control a process with slow reaction and minimum dead time or transfer lag

Answer

Fully opens the final control element, when the measured variable is below the set point

Answer

Fully closes the final control element, when the measured variable is above the set point

Answer

None of these

Question 3

Which of the following is an unconventional source of energy ?

Accepted Answer

Solar power

Answer

Thermal power

Answer

Hydroelectric power

Answer

Nuclear-fusion power

Question 4

Refrigerative cooling employed during long distance transportation of food stuffs is normally done by

Accepted Answer

Liquid nitrogen

Answer

Ice

Answer

Liquid oxygen

Answer

Vacuum evaporation

Question 5

Machine tool bodies are usually made of

Accepted Answer

Cast iron

Answer

Mild steel

Answer

Wrought iron

Answer

Copper alloys

Question 6

Increase in the entropy of a system represents the

Accepted Answer

Degradation of energy

Answer

Decrease in system pressure

Answer

Increase in the availability of energy

Answer

Increase in the temperature

Question 7

The units of the rate constant for a second order reaction are

Accepted Answer

Moles−1. sec1

Answer

Sec−1. mole°

Answer

Moles1. sec−1

Answer

Moles1. sec1

Question 8

The single most imortant requirement for a turbine blade material is

Accepted Answer

Creep resistaned

Answer

Damping

Answer

Resilience

Answer

DBTT

Question 9

Moist climate is the most favourable factor in the site selection far a

Accepted Answer

Textile factory

Answer

Steel plant

Answer

Petroleum refinery

Answer

Coke oven battery