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# Carnot Engine Questions

A Carnot engine is a theoretical engine that operates on the Carnot cycle. A Carnot cycle is defined as an ideal reversible closed thermodynamic cycle. Nicolas Leonard Sadi Carnot developed the basic model for the Carnot engine. The Carnot heat-engine cycle is a completely reversible cycle.

Important Carnot Engine Questions with Answers

1. The heat engine converts heat to _____ energy.

1. Solar
2. Chemical
3. Mechanical
4. Wind

Explanation: The heat engine converts heat to mechanical energy.

2. ______ is the study of the relation between heat and work.

1. Dynamics
2. Thermodynamics
3. Mechanics
4. Anthropology

Explanation: Thermodynamics deals with work, temperature, and heat and their relationship.

3. The Carnot engine is a theoretical thermodynamic cycle proposed by _______.

1. Kepler
2. Newton
3. Leonard Carnot

Explanation: Leonard Carnot was the first person to propose a theoretical thermodynamic cycle.

4. Adiabatic process equation is ______.

1. PV<sup>γ</sup> = constant
2. PV = 2*constant
3. 2*PV<sup>γ</sup> = constant/2
4. None of the options

Explanation: PV<sup>γ</sup> = constant

Where,

P is the pressure of the system

V is the volume of the system

5. A quantum harmonic oscillator is also an example of ______.

Explanation: A quantum harmonic oscillator is an ideal example of an adiabatic system.

6. Thermodynamic process which occurs at a constant temperature is known as ________.

2. Isothermal process

Explanation: The isothermal process occurs at a constant temperature.

7. The Carnot’s engine’s efficiency depends on the absolute temperature of the _____.

1. Source
2. Sink
3. Both source and sink
4. Neither source nor sink

Answer: c) Both source and sink

Explanation: The absolute temperature of the source and sink affects the Carnot’s engine’s efficiency.

8. What is the equation for the first law of thermodynamics?

1. ΔU = q – W
2. ΔU = q + W
3. ΔU = q / W
4. ΔU = q * W

Answer: b) ΔU = q + W

Explanation: The equation for the first law of thermodynamics is given by ΔU = q + W.

9. Choose YES or NO: The efficiency of a heat engine is 100%.

1. YES
2. NO

Explanation: The efficiency of a heat engine cannot be 100%.

10. The Carnot heat engine operates on a ______.

1. Reversible Carnot cycle
2. Non-reversible Carnot cycle