海船船员考试
单选题Crankcase explosions in propulsion diesel result from（）A the splashing of lubrication oil by the crankshaftB the dilution of crankcase oil with particles of combustionC broken fuel lines spraying oil on the crankcaseD the ignition of unburned fuel and
题目
the splashing of lubrication oil by the crankshaft
the dilution of crankcase oil with particles of combustion
broken fuel lines spraying oil on the crankcase
the ignition of unburned fuel and air in the crankcase
参考答案和解析
相似问题和答案
第1题：
Crankcase explosions in propulsion diesel engines result from ____.
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
第2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3题：
Motor-propelled lifeboats are required to be fitted with which of the following?______.
A.Compartments for the storage of canned drinking water
B.Ballast tanks to prevent the boat from capsizing
C.An air starter on the diesel engine
D.Auxiliary mechanical propulsion ( Fleming gear )
机动救生艇需要安装下列哪些？罐装饮用水储藏舱室。
第4题：
reduce heat radiation to the engine room
aid in preventing turbocharger overheating
condense and drain moisture from exhaust gases
dampen exhaust gas pulsations in the manifold
第5题：
a leaking seal ring
heat transfer from exhaust valves
restricted cooling passages
overheated intake valves
第6题：
A thrust bearing is used with a propulsion diesel engine to ____.
A.control axial movement of the crankshaft
B.transmit engine thrust to the propeller shaft
C.absorb vibrations in the propeller shafting
D.prevent propeller thrust from being transmitted to the hull
第7题：
Crankcase explosions in propulsion diesel engines result from
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
第8题：
A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).
A.reduce heat radiation to the engine room
B.aid in preventing turbocharger overheating
C.condense and drain moisture from exhaust gases
D.dampen exhaust gas pulsations in the manifold
解析：water jacket：水套;exhaust manifold：排气总管;heat radiation：热辐射;condense and drain moisture from exhaust gases:将水分从排气中冷凝析出;dampen exhaust gas pulsations in the manifold：缓解排气总管中的废气脉动
译文：环绕排气总管的水套是为了减少对机舱的热辐射。
第9题：
excessive crankcase pressure
excessive lube oil temperature
contamination of the lube oil by water
contamination of the cooling water by lube oil
第10题：
starting the engine while hot
knurling the piston skirt
operating the engine overheated
scuff resistant piston rings