A. 0.5
B. 3.5
C. 4.5
D. 8.5
✅ The correct answer is option B.
Chemical Engineering MCQs
Nylon-66 is a polyamide of
hexamethylene diamine and adipic acid.
adipic acid and methyl amine.
vinyl chloride and formaldeyde.
none of these.
✅ The correct answer is option A.
An isolated system can exchange __________ with its surroundings.
A. Matter
B. Energy
C. Neither matter nor energy
D. Both matter and energy
✅ The correct answer is option C.
Charles’ law for gases states that
A. V/T = Constant
B. V ∝ 1/T
C. V ∝ 1/P
D. PV/T = Constant
✅ The correct answer is option A.
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is
A. Superheated vapour
B. Partially condensed vapour with quality of 0.9
C. Saturated vapour
D. Partially condensed vapour with quality of 0.1
✅ 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 (C.O.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/R1
✅ The correct answer is option A.
A domestic refrigerator has a/an __________ cooled condenser.
A. Water
B. Air
C. Evaporative
D. Gas
✅ The correct answer is option B.
Entropy change in case of reversible adiabatic process is
A. Minimum
B. Zero
C. Maximum
D. Indeterminate
✅ The correct answer is option B.
Polypropylene is preferred to polythene, because the former is
non-inflammable
harder
stronger
both(b) & (c)
✅ The correct answer is option D.
Heat pump
A. Accomplishes only space heating in winter
B. Accomplishes only space cooling in summer
C. Accomplishes both A and B
D. Works on Carnot cycle
✅ The correct answer is option C.