6
2
12
8
第1题：
At least ___ cylinders in four--stroke engine will be configured to ensure that the engine can started with the crankshaft at whatever position.
A.6
B.2
C.12
D.8
第2题：
operated manually once an hour
operated until the engine has started
placed into operation only at maximum load
adjustable to meet lubrication requirements
第3题：
Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A.The direction of pressure on the journal in four-stroke engine is continuously
B.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C.four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D.Low-stroke engines usually consume less lube oil than four-stroke engines
第4题：
be turned by a turning gear for at least one minute
be turned by a turning gear for at least two minutes
be turned at least one complete turn
be turned at least two complete turns
第5题：
most critical in a four-stroke cycle diesel engine
most critical in a two-stroke/cycle diesel engine
most critical in a four-stroke/cycle diesel engine if it is turbocharged
of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
第6题：
after TDC
before TDC
after BDC
before BDC
第7题：
half the engine speed
twice the engine speed
the engine speed
four times the engine speed
第8题：
A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an
A.turbocharger malfunction or failure
B.crankcase exhauster overload
C.overload on the intercooler
D.obstruction in the engine cylinders
第9题：
turn engine with jacking gear
drain filters and strainers and bleed off water at each injection pump
use ether to start the engine with blow-down valves open
blow through the cylinders and fuel lines with a drying agent
第10题：
The direction of pressure on the journal in four-stroke engine is continuously
positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
Low-stroke engines usually consume less lube oil than four-stroke engines