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- Question
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
- Correct Answer
- either (a) or (b)
- 1. 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
- 2. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.
Options- A. directly
- B. indirectly Discuss
- 3. 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
- 4. 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
- 5. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
Options- A. coincides with its centre of gravity
- B. lies above its centre of gravity
- C. lies below its centre of gravity
- D. lies between the centre of buoyancy and centre of gravity Discuss
- 6. 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 Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes.
Options- A. Agree
- B. Disagree Discuss
Thermodynamics problems
Search Results
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: coincides with its centre of gravity
Correct Answer: p v = constant, if T is kept constant
Correct Answer: directly
Correct Answer: cut-off ratio and compression ratio
Correct Answer: Q1 - 2 = dU + W1 - 2
Correct Answer: Agree
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