Chemical Engineering Basics MCQs

Question 1

In a titration involving weak acid and strong base, the preferred indicator is

Accepted Answer

Phenolphthalein

Answer

Methyl orange

Answer

Ethyl orange

Answer

Fehling's solution

Question 2

Projection welding & stud welding is categorised as the __________ welding.

Accepted Answer

Resistance

Answer

Pressure

Answer

Thermit

Answer

Arc

Question 3

Filler metal is not used in the __________ welding.

Accepted Answer

All of the above

Answer

Seam

Answer

Electric spot

Answer

Projection

Question 4

Consumable electrodes are used in the __________ welding.

Accepted Answer

Arc

Answer

Gas

Answer

Thermit

Answer

Resistance

Question 5

Nusselt number/Biot number varies

Accepted Answer

Inversely with thermal conductivity

Answer

Directly with heat transfer co-efficient

Answer

Directly with thermal conductivity

Answer

Inversely with the dimension of the solid

Question 6

The same volume of all gases is representative of their

Accepted Answer

Molecular weights

Answer

Specific gravities

Answer

Densities

Answer

Gas characteristic constants

Question 7

The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is

Accepted Answer

More

Answer

Less

Answer

Same

Answer

More but less than the diameter of bolt

Question 8

Silicon in steel

Accepted Answer

All of the above

Answer

Makes it usable in almost all magnetic circuits where alternating current is used

Answer

Increases its electrical resistivity and decreases the hysteresis loss

Answer

Is present upto 5% & 4% respectively when used in transformers & motor armatures

Question 9

Carbon supply in pack carburising process is in the form of

Accepted Answer

Charcoal

Answer

Calcium carbide

Answer

Hydrocarbon oil

Answer

Graphite