A. Is trebled
B. Remains unchanged
C. Decreases by a factor of √3
D. Decreases by a factor of 1/3
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
When a copper ball is heated, the largest percentage increase will be in its
A. Radius
B. Area
C. Mass
D. Volume
✅ The correct answer is option D.
While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.
A. Waiting
B. Idle
C. Inspection
D. Tool replacement
✅ The correct answer is option A.
The starting of a car takes time in winter, because the
A. Octane number of fuel is decreased
B. Fuel supply for ignition is not sufficient
C. Vaporisation of the fuel is decreased
D. Pour point of fuel decreases
✅ The correct answer is option C.
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
A. Diminishing balance
B. Sinking fund
C. Multiple straight line
D. Sum of the years digit
✅ The correct answer is option A.
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
A. Time
B. Square root of time
C. Square of time
D. Cube of time
✅ The correct answer is option B.
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
A. Pitot tube
B. Hot wire anemometer
C. Rotameter
D. Stroboscope
✅ The correct answer is option A.
A psychrometer does not measure the __________ temperature of moist air.
A. Dew point
B. Dry bulb
C. Wet bulb
D. None of these
✅ The correct answer is option A.
Powder metallurgy process does not make metal powder by
A. Atomisation
B. Grinding/milling
C. Hammering
D. Electrolytic deposition
✅ The correct answer is option C.
__________ of hard alloy and tool steel is done to make it easily machinable.
A. Case carburising
B. Tempering
C. Normalising
D. Annealing
✅ The correct answer is option B.