Thermodynamics problems
- 1. A cycle consisting of two constant pressure and two isentropic processes is known as
Options- A. Carnot cycle
- B. Stirling cycle
- C. Otto cycle
- D. none of these Discuss
Correct Answer: none of these
- 2. The value of one bar (in S. I. units) is equal to
Options- A. 1 x 102 N/m2
- B. 1 x 103 N/m2
- C. 1 x 104 N/m2
- D. 1 x 105 N/m2 Discuss
Correct Answer: 1 x 105 N/m2
- 3. A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
Options- A. -140 kJ
- B. -80 kJ
- C. -40 kJ
- D. +60 kJ Discuss
Correct Answer: +60 kJ
- 4. The throttling process is __________ process.
Options- A. reversible
- B. irreversible
- C. reversible or irreversible Discuss
Correct Answer: irreversible
- 5. The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
Options- A. Boyle's law
- B. Charle's law
- C. Gay-Lussac law
- D. Joule's law Discuss
Correct Answer: Joule's law
- 6. When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as
Options- A. thermodynamic law
- B. thermodynamic process
- C. thermodynamic cycle
- D. none of these Discuss
Correct Answer: thermodynamic process
- 7. The change of entropy, when heat is absorbed by the gas, is
Options- A. positive
- B. negative
- C. positive or negative Discuss
Correct Answer: positive
- 8. Which of the following is the extensive property of a thermodynamic system?
Options- A. Pressure
- B. Volume
- C. Temperature
- D. Density Discuss
Correct Answer: Volume
- 9. Second law of thermodynamics defines
Options- A. heat
- B. work
- C. internal energy
- D. entropy Discuss
Correct Answer: entropy
- 10. The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
Options- A. enthalpy
- B. internal energy
- C. entropy
- D. external energy Discuss
Correct Answer: entropy
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