Thermodynamics

Thermodynamics – Section 5

1. For the same maximum pressure and temperature, A. Otto cycle is more efficient than Diesel cycle B. Diesel cycle is more efficient than Otto cycle C. Dual cycle is more efficient than Otto and Diesel cycles D. Dual cycle is less efficient than Otto and Diesel cycles Answer: Option …

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Thermodynamics – Section 4

1. Which of the following gas has the highest calorific value? A. Coal gas B. Producer gas C. Mond gas D. Blast furnace gas Answer: Option A 2. The oxygen atom is __________ times heavier than the hydrogen atom. A. 2 B. 4 C. 8 D. 16 Answer: Option D …

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Thermodynamics – Section 3

1. For the same compression ratio, the efficiency of dual combustion cycle is A. greater than Diesel cycle and less than Otto cycle B. less than Diesel cycle and greater than Otto cycle C. greater than Diesel cycle D. less than Diesel cycle Answer: Option A 2. In an irreversible …

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Thermodynamics – Section 2

1. According to Kelvin-Planck’s statement of second law of thermodynamics, A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work B. it is possible to construct an engine working on a cyclic process, whose sole purpose is …

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Thermodynamics – Section 1

1. All the commercial liquid fuels are derived from natural petroleum (or crude oil). A. True B. False Answer: Option A Explanation: No answer description available for this question. Let us discuss. 2. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as …

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