單項(xiàng)選擇題After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.

A.low compression
B.air-bound fuel system
C.improper spark
D.change in viscosity


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1.單項(xiàng)選擇題If a diesel engine starts firing, but is unable to come up normal speed, either without load or even under a small load, the cause may be （）

A.insufficient fuel supply
B.faulty governor
C.high exhaust back pressure
D.all of the above may cause this problem

2.單項(xiàng)選擇題Air in the fuel can cause（）

A.high lube oil temperature
B.blue smoke
C.the engine to stop
D.piston seizure

3.單項(xiàng)選擇題Which of the following operating procedures should be carried out immediately after any diesel engine is started?（）

A.Take all exhaust temperature reading
B.Check the sump oil level
C.Verify proper lube oil pressure
D.All of the above

4.單項(xiàng)選擇題Which of the following conditions would cause carbon deposits to form in the piston ring belt of a diesel engine?（）

A.faulty combustion
B.excessive ring temperature
C.over lubrication
D.all of the above

5.單項(xiàng)選擇題The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the （）

A.inlet nozzle ring
B.turbine wheel blade
C.diffuser passages
D.inlet vol