$$ Question Three

An engine working on Otto cycle has a volume of $0\mathrm{.}45m^3,$ pressure of $1$ bar and a temperature

of $30C$ at the beginning of the compression stroke. At the end of the compression stroke the

pressure is $11$ bar. During constant volume heating process, $210$ kJ of heat is added.

Determine the;

$($a$)$ pressures, temperatures and volumes at cardinal points in the cycle.

$($b$)$ efficiency of the cycle.

$($c$)$ percentage clearance.

$($d$)$ mean effective pressure. Take $=1\mathrm{.}4,C_{?}$

$u=0\mathrm{.}71k\frac{J}{k}gK,R=0\mathrm{.}287k\frac{J}{k}gK.$