单项选择题

For a diesel engine, individual cylinder performance is commonly determined by exhaust gas（）

A.chemical analysis
B.back pressure readings
C.pyrometer readings
D.infrared analysis

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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

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