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Total Questions : 1058 | Page 3 of 106 pages
Question 21. An actual engine is to be designed having same efficiency as the carnot cycle. such a proposition is
  1.     Feasible
  2.     Impossible
  3.     Possible
  4.     Possible, but with lot of sophistications
 Discuss Question
Answer: Option D. ->  Possible, but with lot of sophistications
Question 22. Addition of heat at constant pressure to a gas results in
  1.     Raising its temperature
  2.     Raising its pressure
  3.     Raising its volume
  4.     Raising its temperature and doing external work
 Discuss Question
Answer: Option D. ->  Raising its temperature and doing external work
Explanation :
Question 23. The absolute zero pressure can be attained at a temperature of
  1.     0°C
  2.     -273°C
  3.     273 K
  4.     None of these
 Discuss Question
Answer: Option D. ->  None of these
Explanation :
Question 24. Which of the following items is not a path function?
  1.     Heat
  2.     Work
  3.     Kinetic energy
  4.     Thermal conductivity
 Discuss Question
Answer: Option D. ->  Thermal conductivity
Explanation :
Question 25. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to
  1.     +ve
  2.     -ve
  3.     Zero
  4.     Anywhere between zero and infinity
 Discuss Question
Answer: Option C. ->  Zero
Question 26. The specific heat of air increases with increase in
  1.     Temperature
  2.     Pressure
  3.     Both pressure and temperature
  4.     Variation of its constituents
 Discuss Question
Answer: Option A. ->  Temperature
Question 27. The sum of internal energy (u) and the product of pressure and volume (p.v) is known as
  1.     Work done
  2.     Entropy
  3.     Power
  4.     Enthalpy
 Discuss Question
Answer: Option D. ->  Enthalpy
Explanation :
Question 28. One watt is equal to
  1.     1 Nm/s
  2.     1 N/m
  3.     1 Nm/hr
  4.     1 kNm/hr
 Discuss Question
Answer: Option A. ->  1 Nm/s
Question 29. According to kelvin-planck's statement, a perpetual motion of the __________ is impossible.
  1.     First kind
  2.     Second kind
  3.     Third kind
  4.     None of these
 Discuss Question
Answer: Option B. ->  Second kind
Question 30. The efficiency of stirling cycle is __________ carnot cycle.
  1.     Greater than
  2.     Less than
  3.     Equal to
  4.     None of these
 Discuss Question
Answer: Option C. ->  Equal to

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