intake stroke
exhaust stroke
power stroke
compression stroke
第1题：
clogged fuel injection pumps
increased cylinder liner wear
intake valve stem corrosion
varnish deposit on pistons
第2题：
employing fuel oil as a cooling medium
preventing hard carbon deposit on nozzle tips
avoiding fuel oil temperature exceeding builder’s specification
ensuring good metallic contact between nozzles and cylinder heads
第3题：
If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the
A.fuel line connections to the cylinder injection valves
B.gasket surfaces of the fuel oil filters
C.discharge fittings of the fuel injector pumps
D.suction side of the fuel oil transfer pump
第4题：
excessive fuel oil temperature
long periods of engine overload
metallic contact between nozzles and cylinder heads
hard carbon deposit and varnish on the nozzles
第5题：
Increase the cooling water flow to the engine
Secure or reduce fuel to that cylinder
Screw down on the pressure adjusting spring to decrease to decrease popping pressure
Readjust the injection timing
第6题：
turbocharger
injection nozzle tip
carburetor
fuel oil pump
第7题：
corrosion and grooving of exhaust valves
corrosion and gumming of the fuel injection pump
salt deposits in the exhaust manifold
slag deposits in the fuel injection equipment
第8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 enough
B.cylinder compression temperature may be too high
C.fuel oil injection pressure may not be high enough
D.scavenge and purge process is incomplete
第9题：
feel the high pressure fuel line
check the cylinder exhausts for white smoke frequently
check the cylinder exhaust temperature
isolate each cylinder and inspect the injector
第10题：
governor malfunctions
fuel injection system malfunctions
high cylinder lube oil temperatures
low intake temperatures