Chemical Engineering Basics MCQs

Question 1

Stainless steel is welded with difficulty because of

Accepted Answer

Oxide film formation

Answer

Its high melting temperature

Answer

Chances of cracking

Answer

Chromium carbide formation

Question 2

Which of the following properties of a solid is not dependent on crystal imperfection?

Accepted Answer

Melting point

Answer

Ductility

Answer

Semiconductivity

Answer

Yield stress

Question 3

Identify the correct statement.

Accepted Answer

Lead can be produced in a blast furnace

Answer

Sphlerite is zinc oxide

Answer

The first law of the thermodynamics is stated as δE = δQ - δW

Answer

T. ferrooxidans is a fungus that can be used for leaching chalcopyrite

Question 4

Desalination of water

Accepted Answer

Makes it potable

Answer

Makes it non-potable

Answer

Means distillation of water

Answer

None of these

Question 5

Dew point of air indicates its

Accepted Answer

Moisture content

Answer

Dryness

Answer

Latent heat

Answer

Coolness

Question 6

Copper deposits are found in India at the following location:

Accepted Answer

Khetri

Answer

Kudremukh

Answer

Kolar

Answer

Ramagundam

Question 7

__________ remains constant during the adiabatic cooling of moist air.

Accepted Answer

Wet bulb temperature

Answer

Dry bulb temperature

Answer

Relative humidity

Answer

Specific humidity

Question 8

Pick out the wrong statement.

Accepted Answer

For calculating forces and efficiency of rivetted joint, either rivet diameter or rivet hole diameter is used in case of pressure vessel and in structural work

Answer

For a pressure vessel to be classified as 'thin vessel', the ratio of wall thickness to mean radius is less than 0.1

Answer

Longitudinal joint is normally made butt joint to maintain the circularity of the vessel

Answer

Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm

Question 9

Diamagnetic materials

Accepted Answer

Are magnetised in direction opposite to the magnetic field

Answer

Are magnetised by eddy currents only

Answer

Are non-magnetic and can not be magnetised

Answer

Can be magnetised in one direction only