A. 1
B. 4.0
C. 8
D. 14
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Reynolds number of a fluid flowing in a circular pipe is 10000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
A. 9100
B. 13000
C. 7000
D. 2550
✅ The correct answer is option A.
Lime contains about 90% CaO. Percentage CaO present in limestone is about
A. 25
B. 50
C. 70
D. 80
✅ The correct answer is option B.
Reduction reaction involves the
A. Loss of electrons
B. Increase in oxidation number
C. Gain of electrons
D. Addition of oxygen
✅ The correct answer is option C.
Unit of viscosity in CGS system is
A. Gm .cm⁻¹ sec⁻¹
B. Gm . cm² . sec⁻²
C. Gm .cm⁻², sec⁻¹
D. Gm . cm . sec⁻¹
✅ The correct answer is option A.
The main reducing agent in iron blast furnace is
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Air
✅ The correct answer is option B.
Stainless steel is welded with difficulty because of
A. Its high melting temperature
B. Chances of cracking
C. Oxide film formation
D. Chromium carbide formation
✅ The correct answer is option C.
Good design of the casing of a centrifugal pump aims at minimising the
A. Cavitation
B. Frictional losses
C. Kinetic energy loss
D. Static head
✅ The correct answer is option C.
The ‘transition temperature’ for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.
A. Carbon
B. Manganese
C. Both A & B
D. Neither A nor B
✅ The correct answer is option A.
Thermal expansion of solid is employed in the temperature measurement by a
A. Bimetallic thermometer
B. Thermocouple
C. Mercury thermometer
D. Resistance thermometer
✅ The correct answer is option A.