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- 1. Multiple Choice
The maximum efficiency of a heat engine that operates between temperatures of 1500 K in the firing chamber and 600 K in the exhaust chamber is most nearly
33%
40%
60%
67%
100%
- 2. Multiple Choice
In each cycle of a certain Carnot engine, 100 joules of heat is absorbed from the high‑temperature reservoir and 60 joules is exhausted to the low‑temperature reservoir. What is the efficiency of the engine?
40%
60%
67%
150%
167%
- 3. Multiple Choice
The theoretical (Carnot) efficiency of a heat engine operating between 600ºC and 100ºC is:
16.7%
20.0%
42.7%
57.3%
83.3%
- 4. Multiple Choice
A heat engine takes in 200 J of thermal energy and performs 50 J of work in each cycle. What is its efficiency?
50 %
40 %
25 %
20 %
12 %
- 5. Multiple Choice
An engine operates on the cycle shown in the PV diagram below. The working substance of the engine is an ideal monatomic gas. The processes A → B and C → D are isobaric, while processes B → C and D → A are isochoric.
What is the efficiency of a Carnot engine operating between the same maximum and minimum temperatures as this engine?
1/6
1/3
1/2
3/5
5/6
- 6. Multiple Choice
What would be the efficiency of the heat engine diagramed as shown below?
300 %
133 %
75 %
33 %
25 %
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