Thermodynamics - Mechanical Engineering Questions and Answers

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The heat absorbed during a polytropic process is

\(\frac { Y - n } { Y - 1}\)x Workdone

\(\frac { Y - n } { Y - 1} \times \frac{\rho_1v_1 - \rho_2v_2}{(n-1)}\)

\(\frac { Y - n } { Y - 1} \times \frac{m R (T_1 -T_2)}{(n-1)}\)

all of these

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Liquid fuels consist of hydrocarbons.

True

False

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

\(\frac { v_1 } { v_2 }\)

\(\frac { v_2 } { v_1 } \)

\(\frac { v_1 + v_2 } {v_1}\)

\(\frac { v_1 + v_2 } {v_2}\)

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

Agree

Disagree