Sub-topic 1
2026 · National Preliminary
Free
Thermal efficiency of a carnot engine: eta = 1 - tc/th
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Sub-topic 2
2026 · National Preliminary
Premium
Thermal efficiency of a carnot engine: eta = 1 - tc/th
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Sub-topic 3
2014 · National Final
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Thermal efficiency of a heat engine from heat absorbed and heat rejected
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Sub-topic 4
2014 · National Final
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Thermal efficiency of a heat engine from work done and heat rejected
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Sub-topic 5
2014 · National Final
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Work done by a heat engine from its efficiency and the heat rejected
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Sub-topic 6
2014 · National Final
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The stirling engine achieves the maximum thermal efficiency of any heat engine between two temperatures (true/false)
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Sub-topic 7
2014 · National Final
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A carnot refrigerator has the maximum coefficient of performance between two temperatures (true/false)
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Sub-topic 8
2014 · National Final
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Otto-cycle thermal efficiency increases, not decreases, with compression ratio (true/false)
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Sub-topic 9
2020 · National One-Eighth
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Thermal efficiency of a heat engine from heat absorbed and rejected
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Sub-topic 10
2023 · National One-Eighth
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True or false: a heat engine between 27°c and 227°c has efficiency at most 200/227
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Sub-topic 11
2023 · National One-Eighth
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True or false: the same heat engine's thermal efficiency cannot exceed 40%
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