The thermal efficiency of the ideal diesel cycle is given by equation____ Where, ρ = Cut off ratio, r = Compression ratio.

\({\eta _{otto}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\)

\({\eta _{diesel}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\frac{{{(\rho ^\gamma } - 1)}}{{\gamma \left( {\rho - 1} \right)}}\)

\({\eta _{diesel}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\frac{{\gamma({\rho } - 1})}{{ \left( {\rho^\gamma - 1} \right)}}\)

The thermal efficiency of the ideal diesel cycle is given by equation_

1.	The thermal efficiency of the ideal diesel cycle is given by equation____ Where, ρ = Cut off ratio, r = Compression ratio.
A.	\({\eta _{diesel}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\frac{{{(\rho ^\gamma } - 1)}}{{\gamma \left( {\rho - 1} \right)}}\)
B.	\({\eta _{otto}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\)
C.	\({\eta _{diesel}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\frac{{\gamma({\rho } - 1})}{{ \left( {\rho^\gamma - 1} \right)}}\)
D.	none of the above
Answer» B. \({\eta _{otto}} = 1 - \frac{1}{{{r^{\gamma - 1}}}}\)