A.a reduction
B.an increase
C.an outing
D.a downwards
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A.manoeuvring operations
B.bad combustion
C.cooling
D.mooring trial
A.viscosity
B.twisting moments
C.inertia
D.thermal expansion
A.bottom
B.middle
C.top
D.none of the above
A.higher
B.lower
C.the same
D.none of the above
A.the piston rods
B.the crank throws
C.the thrust bearings
D.the main bearings
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If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.