Chemical Engineering Basics MCQs

Question 1

With increase in annealing temperature, the following defect density decreases.

Accepted Answer

All of the above

Answer

Vacancy

Answer

Dislocation

Answer

Grain boundary

Question 2

Which of the following has the least oili-ness ?

Accepted Answer

Mineral oils

Answer

Vegetable oils

Answer

Greases

Answer

Animal oils

Question 3

Which of the following is a permanent fastening?

Accepted Answer

Rivets

Answer

Bolts

Answer

Screws

Answer

Keys

Question 4

Which of the following is a synthetic abrasive ?

Accepted Answer

Silicon carbide

Answer

Corundum

Answer

Emery

Answer

Pumice

Question 5

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

Accepted Answer

Xanthaies

Answer

Cresylic acid

Answer

Pine oil

Answer

All of the above

Question 6

In __________ process, there is an increase in entropy with no degradation of energy.

Accepted Answer

Isothermal expansion

Answer

Isochoric heat addition

Answer

Polytropic expansion

Answer

Isobaric heat addition

Question 7

Wrought iron does not have

Accepted Answer

Uniform strength in all directions

Answer

Ability to hold protective coating

Answer

High ductility & corrosion resistance

Answer

Easily weldable characteristics

Question 8

Wrought iron does not have the

Accepted Answer

Uniform strength in all directions

Answer

Ability to hold protective coating

Answer

High ductility & corrosion resistance

Answer

Easily weldable characteristics

Question 9

Wrought iron is not

Accepted Answer

Having uniform strength in all directions

Answer

Uctile & resistant to corrosion/rusting

Answer

Weldable easily

Answer

Having maximum tensile strength along the lines of slag distribution