Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineering new exam pattern? You came to the right page. This may assist you to understand and check your knowledge about the Subjects. Students also can take a free test of the Multiple Choice Questions of Mechanical Engineering. Each question has four options followed by the right answer. These Mechanical Engineering MCQ Questions are selected supported by the newest exam pattern.
Q1. Work done in a free expansion process is
(A) Zero
(B) Maximum
(C) Minimum
(D) Positive
Answer: (A) Zero
Q2. The gas turbine cycle with regenerator improves
(A) Work ratio
(B) Thermal efficiency
(C) Avoid pollution
(D) None of these
Answer: (B) Thermal efficiency
Q3. The condition of perfect vacuum, i.e., absolute zero pressure can be attained at
(A) A temperature of 273.16°C
(B) A temperature of 0°C
(C) A temperature of 273 °K
(D) A negative pressure and 0°C temperature
Answer: (A) A temperature of 273.16°C
Q4. Stirling and Ericsson cycles are
(A) Quasi-static cycles
(B) Reversible cycles
(C) Semi-reversible cycles
(D) Irreversible cycles
Answer: (B) Reversible cycles
Q5. Work done in an adiabatic process between a given pair of end states depends on
(A) The end states only
(B) Particular adiabatic process
(C) The value of index ‘n’
(D) The value of heat transferred
Answer: (A) The end states only
Q6. The basis for measuring thermodynamic property of temperature is given by
(A) Zeroth law of thermodynamics
(B) First law of thermodynamics
(C) Second law of thermodynamics
(D) Third law of thermodynamics
Answer: (A) Zeroth law of thermodynamics
Q7. A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as
(A) Irreversible cycle
(B) Thermodynamic cycle
(C) Reversible cycle
(D) None of these
Answer: (B) Thermodynamic cycle
Q8. Energy can neither be created nor destroyed but can be converted from one form to other is inferred from
(A) Zeroth low of thermodynamic
(B) First law of thermodynamics
(C) Second law to thermodynamics
(D) Basic law of thermodynamics
Answer: (B) First law of thermodynamics
Q9. If a system after undergoing a series of processes, returns to the initial state then
(A) Process is thermodynamically in equilibrium
(B) Process is executed in closed system cycle
(C) Its entropy will change due to irreversibility
(D) Sum of heat and work transfer will be zero
Answer: (D) Sum of heat and work transfer will be zero
Q10. 1 kgf/cm² is equal to
(A) 760 mm Hg
(B) Zero mm Hg
(C) 735.6 mm Hg
(D) 1 mm Hg
Answer: (C) 735.6 mm Hg
Q11. General gas equation is
(A) PV=nRT
(B) PV=mRT
(C) PV = C
(D) PV=KiRT
Answer: (B) PV=mRT
Q12. Mixture of ice and water form a
(A) Closed system
(B) Open system
(C) Isolated system
(D) Heterogeneous system
Answer: (D) Heterogeneous system
Q13. For reversible adiabatic process, change in entropy is
(A) Maximum
(B) Minimum
(C) Zero
(D) Negative
Answer: (C) Zero
Q14. An adiabatic process is one in which
(A) The temperature of the gas changes
(B) No heat enters or leaves the gas
(C) The change in internal energy is equal to the mechanical work done
(D) All of the above
Answer:(D) All of the above
Q15. The absolute zero temperature is taken as
(A) 237°C
(B) -273°C
(C) -237°C
(D) 273°C
Answer: (B) -273°C
Q16. Which of the following laws is applicable for the behaviour of a perfect gas?
(A) Boyle’s law
(B) Charles ‘law
(C) Gay Lussac’s law
(D) All of the above
Answer: (D) All of the above
Q17. The compression ratio is the ratio of
(A) Total volume to swept volume
(B) Swept volume to clearance volume
(C) Swept volume to total volume
(D) Total volume to clearance volume
Answer: (D) Total volume to clearance volume
Q18. The efficiency of Carnot cycle depends upon
(A) Temperature limits
(B) Volume compression ratio
(C) Cut-off ratio and compression ratio
(D) Pressure ratio
Answer: (A) Temperature limits
Q19. Reheating in a gas turbine
(A) Increases the compressor work
(B) Increases the turbine work
(C) Increases the thermal efficiency
(D) Decreases the thermal efficiency
Answer: (C) Increases the thermal efficiency
Q20. Heat and work are
(A) Point functions
(B) System properties
(C) Path functions
(D) Intensive properties
Answer: (C) Path functions
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- Mechanical Engineering Thermodynamics – Set 2
- Mechanical Engineering Thermodynamics – Set 3
- Mechanical Engineering Thermodynamics – Set 4
- Mechanical Engineering Thermodynamics – Set 5
- Mechanical Engineering Thermodynamics – Set 6
- Mechanical Engineering Thermodynamics – Set 7
- Mechanical Engineering Thermodynamics – Set 8
- Mechanical Engineering Thermodynamics – Set 9
- Mechanical Engineering Thermodynamics – Set 10
- Mechanical Engineering Thermodynamics – Set 11
- Mechanical Engineering Thermodynamics – Set 12
- Mechanical Engineering Thermodynamics – Set 13
- Mechanical Engineering Thermodynamics – Set 14
- Mechanical Engineering Thermodynamics – Set 15
- Mechanical Engineering Thermodynamics – Set 16
- Mechanical Engineering Thermodynamics – Set 17
- Mechanical Engineering Thermodynamics – Set 18
- Mechanical Engineering Thermodynamics – Set 19
- Mechanical Engineering Thermodynamics – Set 20
- Mechanical Engineering Thermodynamics – Set 21
- Mechanical Engineering Thermodynamics – Set 22