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MCQs

Total Questions : 1058 | Page 95 of 106 pages
Question 941. The unit of energy is S. I. units is
  1.    Joule meter (Jm)
  2.    Watt (W)
  3.    Joule/meter (J/m)
  4.    Joule (J)
 Discuss Question
Answer: Option D. -> Joule (J)
Question 942. The unit of universal gas constant is
  1.    None of these
 Discuss Question
Answer: Option A. -> None of these
Question 943. The condition for the reversibility of a cycle is
  1.    The working parts of the engine must be friction free
  2.    All of these
  3.    The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
  4.    All the processes, taking place in the cycle of operation, must be extremely slow
 Discuss Question
Answer: Option B. -> All of these
Question 944. For which of the following substances, the gas laws can be used with minimum error
  1.    Superheated steam
  2.    Dry steam
  3.    Saturated steam
  4.    Wet steam
 Discuss Question
Answer: Option A. -> Superheated steam
Question 945. In a Carnot cycle, heat is transferred at
  1.    Constant temperature
  2.    Constant volume
  3.    Constant enthalpy
  4.    Constant pressure
 Discuss Question
Answer: Option A. -> Constant temperature
Question 946. General gas equation is
  1.    PV=KiRT
  2.    PV=nRT
  3.    PV=mRT
  4.    PV = C
 Discuss Question
Answer: Option C. -> PV=mRT
Question 947. The efficiency of Diesel cycle increases with
  1.    Constant cut-off
  2.    Decrease in cut-off
  3.    None of these
  4.    Increase in cut-off
 Discuss Question
Answer: Option B. -> Decrease in cut-off
Question 948. Which of the following gas has a minimum molecular mass?
  1.    Nitrogen
  2.    Oxygen
  3.    Methane
  4.    Hydrogen
 Discuss Question
Answer: Option D. -> Hydrogen
Question 949. Boyle's law i.e. pV = constant is applicable to gases under
  1.    All ranges of pressures
  2.    High range of pressures
  3.    Only small range of pressures
  4.    Steady change of pressures
 Discuss Question
Answer: Option C. -> Only small range of pressures
Question 950. An isolated system is one in which
  1.    Both energy and mass cross the boundaries of the system
  2.    Neither mass nor energy crosses the boundaries of the system
  3.    Mass does not cross boundaries of the system, though energy may do so
  4.    Mass crosses the boundary but not the energy
 Discuss Question
Answer: Option B. -> Neither mass nor energy crosses the boundaries of the system

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