A. Minor
B. Major
C. Pitch
D. None of these
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
In the Bayer’s process, bauxite is digested under pressure using
A. H₂SO₄
B. NaOH
C. NH₃
D. HCl
✅ The correct answer is option B.
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
A. Cooling produces tension on the surface
B. Cooling produces compression on the surface
C. Heating does not produces any thermal stress
D. Heating produces compression on the surface
✅ The correct answer is option A.
Paint spray gun works on the principle of
A. Bernoulli’s theorem
B. Boyle’s law
C. Newton’s law of viscosity
D. None of these
✅ The correct answer is option A.
Classification of metal forming processes into hot and cold working is based on the following parameters.
A. Stacking fault energy
B. Recrystallisation temperature
C. Solidus temperature
D. Transformation temperature
✅ The correct answer is option B.
Coke is added in the blast furnace to
A. Reduce & melt the iron ore
B. Increase the fluidity of slag
C. Remove sulphur & phosphorus from molten metal
D. None of these
✅ The correct answer is option A.
pH value of rain water in India ranges from
A. 5.5 to 7.5
B. 8 to 9.5
C. 3.5 to 5
D. 9.5 to 10.5
✅ The correct answer is option A.
Drills are usually made of
A. Cermets
B. High speed steel
C. Alloy steel
D. Tungsten carbide
✅ The correct answer is option B.
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
A. Wet bulb
B. Dry bulb
C. Saturation
D. Dew point
✅ The correct answer is option A.
The speed of sound will be maximum in
A. Vacuum
B. Metal
C. Air
D. Water
✅ The correct answer is option B.