7-54.The amount of heat lost by an enginecylinder through the exhaust is deter-mined by the temperature in thecylinder1.when exhaust begins2.after the charge is drawn in3.just before compression begins4.immediately after combustion occurs7-55.When exhaust valves are timed late,what will be the effect on theoperation of an engine?1.Energy losses will increase dueto heat loss2.The engine will lose pressurebefore all available work is obtained3.Insufficient amount air will enterthe cylinders for completedcombustion of the next charge4.Both 1 and 3 above47
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