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. The fuel mostly used in blast furnace for extracting pig iron from iron ores is
(A) Hard coke
(B) Soft coke
(C) Pulverized coal
(D) Bituminous coal
Answer: (A) Hard coke
Q2. The work ratio of a gas turbine plant is given by
(A) (Net work output)/(Work-done by the turbine)
(B) (Net work output)/(Heat supplied)
(C) (Actual temperature drop)/(Isentropic temperature drop)
(D) (Isentropic increase in temperature)/(Actual increase in temperature)
Answer: (A) (Net work output)/(Work-done by the turbine)
Q3. Which of the following statement is correct according to Clausis statement of second law of thermodynamics?
(A) It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
(B) It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
(C) It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
(D) None of the above
Answer:(B) It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
Q4. Which of the following is a reversible non-flow process?
(A) Isochoric process
(B) Isobaric process
(C) Hyperbolic process
(D) All of these
Answer: (D) All of these
Q5. The atomic mass of nitrogen is __ oxygen.
(A) Equal to
(B) Less than
(C) More than
(D) None of these
Answer: (B) Less than
Q6. A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
(A) Isothermal process
(B) Hyperbolic process
(C) Adiabatic process
(D) Polytropic process
Answer: (A) Isothermal process
Q7. The value of 1 mm of Hg is equal to
(A) 1.333 N/m2
(B) 13.33 N/m2
(C) 133.3 N/m2
(D) 1333 N/m2
Answer: (C) 133.3 N/m2
Q8. The natural petroleum may be separated into
(A) Petrol
(B) Kerosene
(C) Fuel oil
(D) Lubricating oil
Answer: (D) Lubricating oil
Q9. When a perfect gas is expanded through an aperture of minute dimensions, the process is known as
(A) Isothermal process
(B) Adiabatic process
(C) Free expansion process
(D) Throttling process
Answer: (D) Throttling process
Q10. If the value of n = 0 in the equation pvn = C, then the process is called
(A) Constant volume process
(B) Adiabatic process
(C) Constant pressure process
(D) Isothermal process
Answer: (C) Constant pressure process
Q11. One molecule of oxygen consists of __ atoms of oxygen.
(A) 2
(B) 4
(C) 8
(D) 16
Answer: (A) 2
Q12. According to Kelvin-Planck’s statement, a perpetual motion of the __ is impossible.
(A) First kind
(B) Second kind
(C) Third kind
(D) None of these
Answer: (B) Second kind
Q13. The unit of energy is S. I. units is
(A) Joule (J)
(B) Joule meter (Jm)
(C) Watt (W)
(D) Joule/meter (J/m)
Answer: (A) Joule (J)
Q14. One kg of carbon produces __ kg of carbon dioxide.
(A) 3/7
(B) 7/3
(C) 11/3
(D) 3/11
Answer: (C) 11/3
Q15. The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)
(A) pv = mRT
(B) pv = RTm
(C) pvm = C
(D) pv = (RT)m
Answer: (A) pv = mRT
Q16. Carnot cycle consists of
(A) Two constant volume and two isentropic processes
(B) Two isothermal and two isentropic processes
(C) Two constant pressure and two isentropic processes
(D) One constant volume, one constant pressure and two isentropic processes
Answer: (B) Two isothermal and two isentropic processes
Q17. The variables which control the physical properties of a perfect gas are
(A) Pressure exerted by the gas
(B) Volume occupied by the gas
(C) Temperature of the gas
(D) All of these
Answer: (D) All of these
Q18. One molecule of oxygen is __ times heavier than the hydrogen atom.
(A) 12
(B) 14
(C) 16
(D) 32
Answer: (D) 32
Q19. Which of the following is the correct statement?
(A) All the reversible engines have the same efficiency.
(B) All the reversible and irreversible engines have the same efficiency.
(C) Irreversible engines have maximum efficiency.
(D) All engines are designed as reversible in order to obtain maximum efficiency.
Answer: (C) Irreversible engines have maximum efficiency.
Q20. A definite area or a space where some thermodynamic process takes place is known as
(A) Thermodynamic system
(B) Thermodynamic cycle
(C) Thermodynamic process
(D) Thermodynamic law
Answer: (A) Thermodynamic system
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- Mechanical Engineering Thermodynamics – Set 3
- Mechanical Engineering Thermodynamics – Set 4
- Mechanical Engineering Thermodynamics – Set 5
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- 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