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 （）.

[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]For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.A . it has a longer power strokeB . more air gets into the cylinder each strokeC . it develops twice as many power s

[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 working cycle of a four-stroke diesel engine consists of four events:（）(1) compression(2) expansion(3) exhaust(4) suctionThe correct sequence isA . (4)-(2)-(3)-(1)B . (4)-(3)-(1)-(2)C . (4)-(3)-(2)-(1)D . (4)-(1)-(2)-(3)

[单选题]Scavenging in a four-stroke/cycle diesel engine occurs during the （）.A . last part of the exhaust stroke, and the first part of the intake strokeB . last part of the intake stroke onlyC . early part of the injection stroke onlyD . early part of the p

[单选题]If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the （）.A . cylinder compression pressure may not be high enoughB . cylinder compression temperature may be too highC . fuel oil injec

[单选题]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.A . fuel injectorsB . exhaust valvesC . intake valvesD . all of the above

[单选题]If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be（）.A . 525 RPMB . 775 RPMC . 1550 RPMD . 1800 RPM

[单选题]In a four-stroke/cycle diesel engine, the camshaft rotates at （）A . twice the crankshaft speedB . half the crankshaft speedC . the same speed as that of the crankshaftD . a speed independent of that of the crankshaft

[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