Engineering Thermodynamics Questions And Answers - Set 16

Practice Test: Question Set - 16

1. A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
    (A) Two constant pressure
    (B) Two constant volume
    (C) Two isentropic
    (D) One constant pressure, one constant volume

2. The condition for the reversibility of a cycle is
    (A) The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
    (B) All the processes, taking place in the cycle of operation, must be extremely slow
    (C) The working parts of the engine must be friction free
    (D) All of the above

3. The change of entropy, when heat is absorbed by the gas, is
    (A) Positive
    (B) Negative
    (C) Positive or negative
    (D) None of these

4. The throttling process is __________ process.
    (A) Reversible
    (B) Irreversible
    (C) Reversible or irreversible
    (D) None of these

5. The isothermal and adiabatic processes are regarded as
    (A) Reversible process
    (B) Irreversible process
    (C) Reversible or irreversible process
    (D) None of these

6. For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
    (A) Dual cycle, Diesel cycle, Otto cycle
    (B) Otto cycle, Diesel cycle, Dual cycle
    (C) Dual cycle, Otto cycle, Diesel cycle
    (D) Diesel cycle, Otto cycle, Dual cycle

7. 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

8. For the same maximum pressure and temperature,
    (A) Otto cycle is more efficient than Diesel cycle
    (B) Diesel cycle is more efficient than Otto cycle
    (C) Dual cycle is more efficient than Otto and Diesel cycles
    (D) Dual cycle is less efficient than Otto and Diesel cycles

9. Charles' law states that all perfect gases change in volume by __________ of its original volume at 0°C for every 1°C change in temperature, when pressure remains constant.
    (A) 1/27th
    (B) 1/93th
    (C) 1/173th
    (D) 1/273th

10. A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
    (A) 30 kJ
    (B) 54 kJ
    (C) 84 kJ
    (D) 114 kJ

11. The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as
    (A) Law of equipartition of energy
    (B) Law of conservation of energy
    (C) Law of degradation of energy
    (D) None of these

12. An isothermal process is governed by
    (A) Boyle's law
    (B) Charles' law
    (C) Gay-Lussac law
    (D) Avogadro's law

13. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
    (A) Carnot cycle
    (B) Stirling cycle
    (C) Otto cycle
    (D) Diesel cycle

14. Which of the following statement is incorrect?
    (A) The liquid fuels consist of hydrocarbons
    (B) The liquid fuels have higher calorific value than solid fuels
    (C) The solid fuels have higher calorific value than liquid fuels
    (D) A good fuel should have low ignition point

15. The efficiency of Joule cycle is
    (A) Greater than Carnot cycle
    (B) Less than Carnot cycle
    (C) Equal to Carnot cycle
    (D) None of these

Show and hide multiple DIV using JavaScript View All Answers

Engineering Thermodynamics:
  Set 01      Set 02      Set 03      Set 04      Set 05      Set 06      Set 07      Set 08      Set 09
  Set 10      Set 11      Set 12      Set 13      Set 14      Set 15      Set 16      Set 17      Set 18
  Set 19      Set 20      Set 21      Set 22      Set 23      Set 24      Set 25      Set 26      Set 27
  Set 28      Set 29      Set 30
  • Blogger Comments
  • Facebook Comments

Post a Comment

Item Reviewed: Engineering Thermodynamics Questions And Answers - Set 16 Rating: 5 Reviewed By: Pranab Debnath
Scroll to Top