All actual heat transfer processes are

Related MCQs

• A heat engine is supplied with 250 kJ/s of heat at a constant fixed temperature of 227°C. The heat is rejected at 27°C. The cycle is reversible, if the amount of heat rejected is
• An inventor claims that a new heat cycle will develop 0.4 kW for a heat addition of 32.5 kJ/mm. The temperature of heat source is 1990 K & that of sink is 850K. Is his claim true?
• The efficiency of all reversible heat engines operating between the same heat reservoirs is
• Isothermal, isobaric, isochoric & adiabatic processes, under ideal conditions, are …. Processes
• Which of the following processes are reversible processes?
• Which one of the following processes or systems does not involve heat
• A chip dissipates 2 kJ of electric work and rejects it as heat transfer from its surface which is at 50°C to 25°C air. How much entropy is generated outside the chip?
• A chip dissipates 2 kJ of electric work and rejects it as heat transfer from its surface which is at 50°C to 25°C air. How much entropy is generated in the chip?
• In adiabatic evaporative cooling, heat transfer between chamber and surroundings is
• If a system undergoes a reversible isothermal process without transfer of heat, the temperature at which this process takes place is called