更多"The lube oil cooler is located afte"的相关试题:
[单项选择]
When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（）
Ⅰ.filtering
Ⅱ.settling
A. Ⅰ only
B. Ⅱ only
C. either Ⅰ or Ⅱ
D. neither Ⅰ or Ⅱ
[单项选择]A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）
A. water contamination
B. mixing oils of two widely different viscosities
C. overheating
D. aeration
[单项选择]Diesel engine lube oil diluted with fuel oil is indicated by（）
A. decreased viscosity
B. decreased pour point
C. increased flash point
D. increased viscosity
[单项选择]Waste oil from the lube oil sumps of machinery may NOT be （）.
A. drained into the vessels bilges
B. reclaimed for other uses
C. held in a slop tank
D. purified and then reused
[单项选择]Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
A. under high pressure
B. under low pressure
C. heated to reduce viscosity
D. cooled to increase viscosity
[单项选择]Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.
A. using a slightly dirty air filter
B. using oil having an excessive viscosity
C. intercooler or after-cooler leaks
D. carrying the oil level higher than normal
[单项选择]Diesel engine lube oil can become contaminated as a result（）
A. the water produced during combustion
B. the sulfur in the fuel
C. unburned fuel oil
D. all of the above
[单项选择]Which of the following characteristic of lube oil helps to reduce the amount of deposits in the piston ring belt during the combustion process in a diesel engine?（）
A. Low viscosity index
B. Low carbon forming tendencies
C. High film strength
D. High non-corrosive qualities
[单项选择]Lube oil accumulating in the cooling water system of a diesel engine will result in （）
A. lube cooler failure
B. poor heat transfer
C. mechanical lubricator failure
D. camshaft seizure
[单项选择]Excessive lube oil consumption can result from worn or broken（）
A. piston rings
B. valve guides
C. valve seals
D. all of the above
[单项选择]High lube oil temperatures developing in a diesel engine can result from（）
A. high oil pressure
B. excessive bearing end play
C. plugged oil control rings
D. engine overload
[单项选择]The quality of the fuel oil and lube oil （）, Im afraid.
A. has much to do with the operation of the engine and its life
B. have much to do with the operation of the engine and its life
C. has much doing with the operation of the engine and its life
D. have much doing with the operation of the engine and its life
[单项选择]If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）
A. changed
B. centrifuged
C. filtered
D. settled
[单项选择]Sludge formation in a diesel engine lube oil system is caused by（）
A. carbonization of oils from the combustion chambers
B. emulsions of lube oil and water
C. coagulation of unburned fuel below the piston rings
D. all of the above
[单项选择]To determine if the lube oil filter elements need changing, （）.
A. open the filter and inspect the elements
B. check the lube oil pump discharge pressure
C. check the lube oil header pressure
D. check the pressure drop across the filter
[单项选择]Main propulsion engine lube oil sumps should be constructed （）
A. so as to never be integral lube
B. with a sloped bottom
C. only of nonferrous, noncorrosive metals
D. with drain/return lines terminating just above or at the designed normal level
[单项选择]When separating the lube oil without additive, it is usually cleaned with hot water; the aim is to remove （） from it.
A. acid
B. sludge
C. mechanical impurity
D. salinity
[单项选择]When separating lube oil separator, the optimal separating quantity is（）of the rated quantity on name plate.
A. 100%
B. 1/2
C. 1/5
D. 1/3
[单项选择]If a used lube oil analysis indicates an excessive chromate content, this means （）
A. air filtration is inadequate
B. engine coolant leaking into the lube oil
C. fuel oil is leaking into the lube oil
D. the piston rings are excessively worn
