- (A) a thermodynamic machine
- (B) a non-thermodynamic machine
- (C) a hypothetical machine
- (D) a hypothetical machine whose opera-tion would violate the laws of thermodynamics
- (E) an inefficient machine
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- (A) heat can’t be transferred from low temperature source to high temperature source
- (B) heat can be transferred for low temperature to high temperature source by using refrigeration cycle.
- (C) heat can be transferred from low temperature to high temperature source if COP of process is more than unity
- (D) heat can’t be transferred from low temperature to high temperature source without the aid of external energy
- (E) all of the above
- (A) carnot
- (B) Stirling
- (C) ericsson
- (D) all of the above
- (E) none of the above
- (A) working substance
- (B) design of engine
- (C) size of engine
- (D) type of fuel fired
- (E) temperatures of source and sink
- (A) gas engine
- (B) well lubricated engine
- (C) petrol engine
- (D) steam engine
- (E) reversible engine
- (A) two isothermals and two isentropics
- (B) two isentropics, and two constant volumes.
- (C) two isentropics, one constant volume and one constant pressure
- (D) two isentropics and two constant pressures
- (E) none of the above
- (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
- (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
- (A) reversible engine
- (B) irreversible engine
- (C) new engine
- (D) petrol engine
- (E) diesel engine
- (A) process is thermodynamically in equilibrium
- (B) process is executed in closed system cycle
- (C) its entropy will change due to irreversibility
- (D) sum of heat and work transfer will be zero
- (E) no work will be done by the system
