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- Question
For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
Options- A. p v = constant, if T is kept constant
- B. v/T = constant, if p is kept constant
- C. p/T = constant, if v is kept constant
- D. T/p = constant, if v is kept constant
- Correct Answer
- p v = constant, if T is kept constant
- 1. The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents
Options- A. heat absorbed
- B. heat rejected
- C. either (a) or (b)
- D. none of these Discuss
- 2. According to Kelvin-Planck's statement of second law of thermodynamics,
Options- A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
- B. it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
- C. it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
- D. none of the above Discuss
- 3. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.
Options- A. directly
- B. indirectly Discuss
- 4. In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
Options- A. running full
- B. running free
- C. partially running full
- D. partially running free Discuss
- 5. The mass per unit volume of a liquid at a standard temperature and pressure is called
Options- A. specific weight
- B. mass density
- C. specific gravity
- D. none of these Discuss
- 6. According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.
Options- A. directly
- B. indirectly Discuss
- 7. The efficiency of Diesel cycle depends upon
Options- A. temperature limits
- B. pressure ratio
- C. compression ratio
- D. cut-off ratio and compression ratio Discuss
- 8. The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)
Options- A. Q1 - 2 = dU + W1 - 2
- B. Q1 - 2 = dU - W1 - 2
- C. Q1 - 2 = dU/W1 - 2
- D. Q1 - 2 = dU x W1 - 2 Discuss
- 9. The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes.
Options- A. Agree
- B. Disagree Discuss
- 10. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
Options- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Kelvin Planck's law Discuss
Thermodynamics problems
Search Results
Correct Answer: either (a) or (b)
Correct Answer: it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
Correct Answer: indirectly
Correct Answer: running free
Correct Answer: mass density
Correct Answer: directly
Correct Answer: cut-off ratio and compression ratio
Correct Answer: Q1 - 2 = dU + W1 - 2
Correct Answer: Agree
Correct Answer: Zeroth law of thermodynamics
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