Discussion
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- Question
The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.
Options- A. equal to
- B. less than
- C. greater than
- Correct Answer
- greater than
- 1. The absolute zero pressure can be attained at a temperature of
Options- A. 0°C
- B. 273°C
- C. 273 K
- D. none of these Discuss
- 2. The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)
Options- A. pv = mRT
- B. pv = RTm
- C. pvm = C
- D. pv = (RT)m Discuss
- 3. When the gas is cooled at constant pressure,
Options- A. its temperature increases but volume decreases
- B. its volume increases but temperature decreases
- C. both temperature and volume increases
- D. both temperature and volume decreases Discuss
- 4. Workdone during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and ? = Ratio of specific heats)
Options- A.
- B.
- C.
- D. all of these Discuss
- 5. An open system is one in which
Options- A. heat and work crosses the boundary of the system, but the mass of the working substance does not crosses the boundary of the system
- B. mass of the working substance crosses the boundary of the system but the heat and work does not crosses the boundary of the system
- C. both the heat and work as well as mass of the working substance crosses the boundary of the system
- D. neither the heat and work nor the mass of the working substance crosses the boundary of the system Discuss
- 6. Which of the following is the correct statement?
Options- A. For a given compression ratio, both Otto and Diesel cycles have the same efficiency.
- B. For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
- C. For a given compression ratio, Diesel cycle is more efficient than Otto cycle.
- D. The efficiency of Otto or Diessel cycle has nothing to do with compressioin ratio. Discuss
- 7. When a gas is heated at constant pressure
Options- A. its temperature will increase
- B. its volume will increase
- C. both temperature and volume will increase
- D. neither temperature not volume will increase Discuss
- 8. The standard value of atmospheric pressure taken at sea level is
Options- A. 1.013 bar
- B. 760 mm of Hg
- C. 1013 x 102 N/m2
- D. all of these Discuss
- 9. The principal constituents of a fuel are
Options- A. carbon and hydrogen
- B. oxygen and hydrogen
- C. sulphur and oxygen
- D. sulphur and hydrogen Discuss
- 10. The work ratio of simple gas turbine cycle depends upon
Options- A. maximum cycle temperature
- B. minimum cycle temperature
- C. pressure ratio
- D. all of these Discuss
Thermodynamics problems
Search Results
Correct Answer: none of these
Correct Answer: pv = mRT
Correct Answer: both temperature and volume decreases
Correct Answer: all of these
Correct Answer: both the heat and work as well as mass of the working substance crosses the boundary of the system
Correct Answer: For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
Correct Answer: both temperature and volume will increase
Correct Answer: all of these
Correct Answer: carbon and hydrogen
Correct Answer: all of these
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