A. Cold reservoir approaches zero
B. Hot reservoir approaches infinity
C. Either A. or B
D. Neither A. nor B
Related Mcqs:
- The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?
A. 100,000 kW
B. 160,000 kW
C. 200,000 kW
D. 320,000 kW - Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the__________________?
A. Two temperatures only
B. Pressure of working fluid
C. Mass of the working fluid
D. Mass and pressure both of the working fluid - The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/R1 - Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is ________________?
A. (T2 – T1)/T2
B. (T2 – T1)/T1
C. (T1 – T2)/T2
D. (T1 – T2)/T1 - The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be _______________?
A. More
B. Less
C. Same
D. Data insufficient to predict - In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be________________?
A. 5.2
B. 6.2
C. 0.168
D. Data insufficient, can’t be found out - A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is_________________?
A. 349
B. 651
C. 667
D. 1000 - Which of the following has the least thermal efficiency ?
A. Steam engine
B. Carnot engine
C. Diesel engine
D. Otto engine - Equation which relates pressure, volume and temperature of a gas is called the__________________?
A. Equation of state
B. Gibbs Duhem equation
C. Ideal gas equation
D. None of these - Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is ___________________?
A. T2/(T1 – T2)
B. T1/(T1 – T2)
C. (T1 – T2)/T1
D. (T1 – T2)/T2
