Ⅰ only
Ⅱ only
either Ⅰ or Ⅱ
neither Ⅰ or Ⅱ
第1题：
On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the______.
A.accumulator spring compression
B.balance piston
C.compensating(补偿) needle valve
D.proportional piston
第2题：
engine overload
leaky valves
stuck or broken piston rings
low air injection pressure
第3题：
A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.
A.engine overload
B.leaky valves
C.stuck or broken piston rings
D.low air injection pressure
第4题：
a worn cylinder
broken piston rings
any of A and B
none of the above
第5题：
The medium speed 4-stroke trunk piston engine
The low speed 2-stroke crosshead engine
The medium speed 2-stroke crosshead engine
The low speed 4-stroke trunk piston engine
第6题：
Speed limiting governor
Over-speed governor
Over-speed trip
Over-speed relay
第7题：
excessive crankcase pressure
excessive lube oil temperature
contamination of the lube oil by water
contamination of the cooling water by lube oil
第8题：
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).
A.a spindle lubricator
B.an oil jet
C.internal splashing
D.drilled passages in the crankshaft
第9题：
direct action of cam shaft
compressed air pressure
hydraulic “push rods”
direct action of the main piston moving down
第10题：
of crosshead type
of trunk piston type
of low speed type
all the above