Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is ________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the__________________?

   A. Cold reservoir approaches zero
   B. Hot reservoir approaches infinity
   C. Either A. or B
   D. Neither A. nor B

6. 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

7. 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

8. The shape of T-S diagram for Carnot Cycle is a__________________?

   A. Rectangle
   B. Rhombus
   C. Trapezoid
   D. Circle

9. The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is__________________?

   A. Less
   B. More
   C. Same
   D. Dependent on climatic conditions

10. The main feature of Carnot refrigeration cycle is that, it________________________?

    A. Does not need the addition of external work for its functioning
    B. Transfers heat from high temperature to low temperature
    C. Accomplishes the reverse effect of the heat engine
    D. None of these