Thermodynamics Question Answer

Thermodynamics Question And Answer For Competitive Exams

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21. The first law of thermodynamics was developed by

(A)  Charle’s

(B) Carnot

(C) Kelvin

(D)  Joule

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22. Carnot cycle has maximum efficiency for –

(A)  Reversible engine

(B)  Irreversible engine

(C)  New engine

(D)  Petrol engine

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23. In a cycle, the heat is rejected at –

(A)Constant temperature

(B) Constant pressure

(C) Constant volume

(D) Constant enthalpy

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24. A sudden fall in the barometer reading is a sign of approaching.

(A)  Fine weather

(B) Rains

(C) Storm

(D) Cold wave

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25. Calorie is a measure of –

(A)  Specific heat

(B) Quantity of heat

(C)  Thermal capacity

(D) Entropy

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26. Barometric pressure I equal to –

(A)  760 mm Hg

(B)  Zero mm Hg

(C)  735.6 mm Hg

(D)  1 mm Hg

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27. The first law of thermodynamics is the law of –

(A)  Conservation of mass

(B)  Conservation of energy

(C)  Conservation of heat

(D)  Conservation of temperature

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28. The constant volume cycle is also called.

(A)  Carnot cycle

(B)  Joule cycle

(C)  Diesel cycle

(D)  Otto cycle

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29. Air refrigerators work on –

(A)  Carnot cycle

(B)  Reversed joule cycle

(C)  Otto cycle

(D)  Stirling cycle

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30. Thermal power plant works on –

(A) Carnot cycle

(B) Joule cycle

(C) Rankine cycle

(D) Otto cycle

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