SSC JE Mechanical Engineering 2015 Paper

Case I- For same compression ratio (r) and heat addition
${\mathit{\eta }}_{\mathrm{otto}}>{\mathit{\eta }}_{\mathrm{dval}}>{\mathit{\eta }}_{\mathrm{diesel}}$
Case II- for same peak pressure, peak temperature and heat rejection
${\mathit{\eta }}_{\mathrm{diesel}}>{\mathit{\eta }}_{\mathrm{dval}}>{\mathit{\eta }}_{\mathrm{otto}}$
Case III - for same max pressure and work output
${\mathit{\eta }}_{\mathrm{diesel}}>{\mathit{\eta }}_{\mathrm{dval}}>{\mathit{\eta }}_{\mathrm{otto}}$