Question

A four$-$cylinder petrol engine has a bore of $57$ mm and a stroke of $90$ mm $.$ Its rated speed is $2800$ rpm and it is tested at this speed against a brake which has a torque arm of $0\mathrm{.}356$ m $.$ The net brake load is $155$ N and the fuel consumption is $6\mathrm{.}74$ litre$/$hr$.$ The specific gravity of the petrol used is $0\mathrm{.}735$ and it has a lower calorific vale of $44,200K\frac{J}{k}g.$ Calculate for this speed, the engine torque, the bmep, the brake thermal efficiency, the specific fuel consumption, and the volumetric efficiency.