Which of the following is an irreversible cycle_____________________?
(A) carnot
(B) Stirling
(C) ericsson
(D) all of the above
(D) none of the above
The efficiency of a Carnot engine depends on_______________________?
(A) working substance
(B) design of engine
(C) size of engine
(D) type of fuel fired
(D) temperatures of source and sink
The efficiency of Carnot cycle is maximum for_____________________?
(A) gas engine
(B) well lubricated engine
(C) petrol engine
(D) steam engine
(D) reversible engine
Diesel cycle consists of following four processes_________________?
(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
(D) none of the above
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
(D) 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
(D) all of the above
Carnot cycle has maximum efficiency for__________________?
(A) reversible engine
(B) irreversible engine
(C) new engine
(D) petrol engine
(D) diesel engine
If a system after undergoing a series of processes, returns to the initial state then__________________?
(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
(D) no work will be done by the system
Carnot cycle efficiency depends upon________________?
(A) properties of the medium/substance used
(B) condition of engine
(C) working condition
(D) temperature range of operation
(D) effectiveness of insulating material around the engine
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be________________?
(A) 650°K
(B) 600°K
(C) 625°K
(D) 700°K
(D) 750°K