Chemical Engineering Basics MCQs

Question 1

Production of a hollow product by inflation of a tube or parison is called the __________ process.

Accepted Answer

Blow moulding

Answer

Calendering

Answer

Extrusion

Answer

Injection

Question 2

The maximum percentage of chromium that can be added to steel is about

Accepted Answer

18

Answer

12

Answer

24

Answer

30

Question 3

Vernier calipers can not be used to measure the

Accepted Answer

Clearance between two mating surfaces

Answer

I.D. & O.D. of the shaft

Answer

Thickness of parts

Answer

Depth of holes

Question 4

The majority charge carriers in p-type silicon are

Accepted Answer

Holes

Answer

Free electrons

Answer

Ions

Answer

Conduction electrons

Question 5

Water hammer is caused in steam carrying pipelines, because of

Accepted Answer

Partial condensation of steam

Answer

Vibration of the pipeline

Answer

High degree of superheat of steam

Answer

Its exposure to torrential rain

Question 6

Cascade control is

Accepted Answer

All of the above

Answer

The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller

Answer

Used when changes in process conditions cause serious upsets in the controlled variable

Answer

Useful to control flow from temperature

Question 7

Case hardening is not done by

Accepted Answer

Both B & C

Answer

Nitriding

Answer

Hot dipping

Answer

Electroplating

Question 8

Cassiterite is an ore of

Accepted Answer

Tin

Answer

Lead

Answer

Molybdenum

Answer

Chromium

Question 9

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?

Accepted Answer

None of these

Answer

Emissivity of pipe surface

Answer

Diameter & length of the pipe

Answer

Temperature of hot pipe surface & that of air in the room