Diesel engine propulsion
Diesel electric propulsion
Steam engine propulsion
Gas turbine propulsion
第1题：
Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with _______.
A.excessive speed
B.improper warm-up
C.extreme misalignment
D.inadequate lubrication
第2题：
smoky exhaust
starting failure
overload
over speed
第3题：
When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for work
A.remains the same
B.is reduced
C.is increased
D.is eliminated
第4题：
water
babbitt
iron or steel
acids
第5题：
a reduction
an increase
an outing
a downwards
第6题：
Wear occurring at the tips of the reduction gear teeth is usually the result of ______.
A.surface fatigue
B.fretting corrosion
C.heavy overloading
D.gear misalignment
第7题：
Prevents lateral movement of the slow speed gear
Transmits propeller thrust to the hull
Keeps spring bearings in line
Prevents main reduction gear axial movement
第8题：
One of the most common causes of reduction gear failure is gear wear caused by scoring as a result of
A.surface fatigue of the gears
B.an inadequate lube oil film
C.plastic flow of the gears
D.fretting corrosion from water
第9题：
remains the same
is reduced
is increased
is eliminated
第10题：
the sump oil level
oil flow sight glasses
bearing temperatures
all of the above