A. 8
B. 35
C. 65
D. 80
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Dew point temperature always gives an indication of the __________ of the moist air.
A. Dryness
B. Moisture content
C. Coolness
D. Latent heat
✅ The correct answer is option B.
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
A. 723
B. 959
C. 1147
D. 1493
✅ The correct answer is option A.
Ammonia leakage in the refrigeration system is detected by
A. Sulphur stick, which on detection gives white smoke
B. Using chemical reagents
C. Its smell
D. Soap solution
✅ The correct answer is option A.
The thickness of oxide film is y at time t. If K₁, K₂ and K₃ are the temperature dependent constants, the parabolic law of oxidation is given by
A. y² = 2k₁t + k₂
B. y = k₁ ln (k₂t + k₃)
C. y = k₁ t + k₂
D. y = k₁t³ + k₂
✅ The correct answer is option A.
The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ – T₂)/T₁. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T₁ and T₂ is given by
A. T₁/(T₁-T₂)
B. T₂/(T₁-T₂)
C. T₁/T₂
D. T₂/T₁
✅ The correct answer is option B.
‘End cooler’ or ‘after cooler’ is employed in air compressor mainly to
A. Remove oil vapour or moisture from air
B. Cool the dry air before use
C. Reduce the volumetric capacity of receiver
D. None of these
✅ The correct answer is option A.
Frost formation on the evaporator tubes in the domestic refrigerators
A. Can be prevented by proper design
B. Decreased compressor power
C. Causes heat loss due to poor heat transfer
D. Is immaterial
✅ The correct answer is option C.
Notched bar test is used for testing the __________ of a material.
A. Impact strength
B. Endurance limit
C. Machinability
D. Corrosion resistance
✅ The correct answer is option A.
A static fluid can not have
A. Zero shear stress
B. Positive normal stress
C. Non-zero shear stress
D. None of these
✅ The correct answer is option C.