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21. One kg of carbon produces __________ kg of carbon dioxide.

A. 3/7
B. 7/3
C. 11/3
D. 3/11

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22. Ericsson cycle consists of two constant pressure and two isothermal processes.

A. Agree
B. Disagree

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23. The isothermal and isentropic processes are reversible non-flow processes.

A. Agree
B. Disagree

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24. The blast furnace gas is a by-product in the production of pig iron in the blast furnace.

A. Yes
B. No

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25. The heat supplied to the gas at constant volume is (where m = Mass of gas, c_v = Specific heat at constant volume, c_p = Specific heat at constant pressure, T₂ – T₁ = Rise in temperature, and R = Gas constant)

A. mR(T₂ – T₁)
B. mc_v(T₂ – T₁)
C. mc_p(T₂ – T₁)
D. mc_p(T₂ + T₁)

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26. Liquid fuels have lower efficiency than solid fuels.

A. True
B. False

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27. The heat absorbed during a polytropic process is

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28. Liquid fuels consist of hydrocarbons.

A. True
B. False

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29. The expansion ratio (r) is the ratio of (where v₁ = Volume at the beginning of expansion, and v₂ = Volume at the end of expansion)

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30. The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes.

A. Agree
B. Disagree

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