单项选择题
Low compression pressure in a diesel engine may be the result of （）
A.insufficient fuel supply due to fuel pump valves sticking or leaking
B.excessive mechanical clearance between the piston crown and cylinder head
C.excessively worn fuel pump plunger
D.excessive exhaust back pressure
相关考题
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单项选择题
Exhaust gas pyrometers are useful for（）
A.detecting faulty combustion in individual cylinders
B.adjusting fuel racks to maintain equal loading between cylinders
C.adjusting the load limit setting of the governor at idle conditions
D.calculating engine horsepower -
单项选择题
A connecting rod in a four-stroke/cycle diesel engine is subject to（）
A.tension load twice each crankshaft revolution
B.compression load during power and compression strokes
C.inertia load once every four crankshaft revolutions
D.bending loads at bottom and top dead center -
单项选择题
Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）
A.cooling water leaving each cylinder
B.fuel oil entering the injector
C.exhaust gases at various locations
D.lube oil at the bearing supplies
