Mechanical Engineering Mcqs

According to first law of thermodynamics_______________________?
  • (A)  mass and energy are mutually convertible
  • (B)  Carnot engine is most efficient
  • (C)  heat and work are mutually convertible
  • (D)  mass and light are mutually convertible
  • (E)  heat flows from hot substance to cold substance
First law of thermodynamics___________________?
  • (A)  enables to determine change in internal energy of the system
  • (B)  does not help to predict whether the system will or not undergo a change
  • (C)  does not enable to determine change in entropy
  • (D)  provides relationship between heat, work and internal energy
  • (E)  all of the above
Carnot cycle efficiency depends upon________________?
  • (A)  properties of the medium/substance used
  • (B)  condition of engine
  • (C)  working condition
  • (D)  temperature range of operation
  • (E)  effectiveness of insulating material around the engine