A . it has a longer power stroke
B . more air gets into the cylinder each stroke
C . it develops twice as many power strokes at the same speed
D . higher combustion pressure is developed
[单选题]A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the ()(1) MEP is lower and the scavenging air is cooling the exhaust gases(2) valve overlap in a four-strokeA . (1) only is
[单选题]The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being ().A . shutB . closingC . openedD . closed
[单选题]Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the ().A . exhaust gas temperature systemB . exhaust load systemC . constant or pulse pressure systemD . constant
[单选题]A. two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four strokeA.①B.②C.① an
[单选题]The four-stroke engine is used for () and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.A . alternatorB . turbo-chargerC . remote controllerD . windla
[单选题]In the four-stroke engine, it takes () to make one power stroke.A . one propulsionB . two propulsionsC . two revolutionsD . one revolutio
[单选题]On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the ().A . thrust blockB . sounding rodC . connecting rodD . push rod
[单选题]For an ordinary four-stroke engine the inlet valves open ()A . after TDCB . before TDCC . after BDCD . before BDC
[单选题]In a four-stroke engine the camshaft rotates at ().A . half the engine speedB . twice the engine speedC . the engine speedD . four times the engine speed
[单选题]In an ordinary four-stroke engine the exhaust valves open ()A . after TDCB . before TDCC . after BDCD . before BDC