Discussion
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- Question
Briquetted coal is produced from the finely ground coal by moulding under pressure with or without a binding material.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Select the correct statement as per Charles' law
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
- 2. The unit of energy is S. I. units is
Options- A. Joule (J)
- B. Joule metre (Jm)
- C. Watt(W)
- D. Joule/metre (J/m) Discuss
- 3. The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.
Options- A. Zeroth
- B. First
- C. Second Discuss
- 4. According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.
Options- A. change
- B. do not change Discuss
- 5. Carnot cycle has maximum efficiency for
Options- A. petrol engine
- B. diesel engine
- C. reversible engine
- D. irreversible engine Discuss
- 6. Which of the following statement is correct?
Options- A. The increase in entropy is obtained from a given quantity of heat at a low temperature.
- B. The change in entropy may be regarded as a measure of the rate of the availability or unavailability of heat for transformation into work.
- C. The entropy represents the maximum amount of work obtainable per degree drop in temperature.
- D. all of the above Discuss
- 7. The polytropic index (n) is given by
Options- A.
- B.
- C.
- D.
Discuss
- 8. The entropy may be expressed as a function of
Options- A. pressure and temperature
- B. temperature and volume
- C. heat and work
- D. all of these Discuss
- 9. Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. This statement is called Avogadro's law.
Options- A. True
- B. False Discuss
- 10. The molecular mass of a substance is the number of times a molecule of that substance is heavier than the hydrogen atom.
Options- A. True
- B. False Discuss
Thermodynamics problems
Search Results
Correct Answer: v/T = constant, if p is kept constant
Correct Answer: Joule (J)
Correct Answer: First
Correct Answer: do not change
Correct Answer: reversible engine
Correct Answer: all of the above
Correct Answer:
Correct Answer: pressure and temperature
Correct Answer: True
Correct Answer: True
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