网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Diesel engine blow-by is the leakage of combustion gases past the （）
A
oil rings only
B
compression and scraper rings
C
cylinder liner sealings
D
cylinder liner ring grooves
参考答案
参考解析
解析：
暂无解析
更多 “单选题Diesel engine blow-by is the leakage of combustion gases past the （）A oil rings onlyB compression and scraper ringsC cylinder liner sealingsD cylinder liner ring grooves” 相关考题
考题
Diesel engine blow-by is the leakage of combustion gases past the( ).A.oil rings onlyB.compression and scraper ringsC.cylinder liner sealingD.cylinder liner ring grooves
考题
单选题An increase in diesel engine crankcase pressure generally indicates excessive（）A
compression pressureB
lube oil header pressureC
scavenge air pressureD
piston ring blow-by
考题
单选题What determines the number of events occurring in a cycle of operation in an internal combustion engine?（）A
Crankshaft revolutionB
Type of engine (diesel or gasoline)C
Distance a piston travels during a strokeD
Number of pistons
考题
单选题Which of the following gases represents the greatest threat to personnel safety in an engine room where the exhaust is leaking from a diesel engine?（）A
Carbon dioxideB
Carbon monoxideC
Carbon trioxideD
Hydrogen sulfide
考题
单选题In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the （）A
wrist pin bushingsB
compression ringsC
cylinder liner sealsD
cylinder liner sealing ring
考题
单选题Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）A
scavengingB
forced draftC
turbo-chargingD
aspiration
考题
单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A
discharge exhaust gases and smokeB
furnish energy to the turbochargerC
reduce engine room noiseD
all of the above
考题
单选题In a diesel engine, blow-by is generally the result of worn（）A
valve guidesB
oil control ringsC
valve seatsD
compression rings
考题
单选题When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）A
During operation at low speedB
During operation at rated speed, but low power outputC
During accelerationD
All of the above
考题
单选题In a diesel engine, blow-by（）A
increase exhaust back pressureB
causes excessive crankcase pressureC
can only be detected by a compression checkD
decreases fuel consumption
考题
单选题Proper atomization of fuel in diesel engine combustion chambers will （）.A
affect the injection pressureB
improve combustionC
reduce compression pressureD
decrease power output
考题
单选题Coolant can be lost from a diesel engine jacket cooling waster system by leakage from（）A
cylinder head cracksB
piping jointsC
pump leakingD
all of the above
考题
单选题In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the（）A
bedplate or baseB
sump or oil panC
cylinder blockD
frame
考题
单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.A
air bottleB
air compressorC
crank caseD
combustion chamber
考题
单选题As for a diesel engine, lack of combustion air may be due to （）.A
fouling turbineB
fuel pump faultsC
lubrication failureD
excessive cooling
考题
单选题Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）A
cylinder valvesB
compression ringsC
piston skirtsD
oil rings
考题
单选题If an auxiliary diesel engine frequently stalls, the trouble may be caused by （）A
low exhaust back pressureB
air in the fuel systemC
gasket blow-by or leakageD
incorrect assembly of idler springs
考题
单选题Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）A
AtomizationB
MeteringC
Effective strokeD
Penetration
考题
单选题Why is the ring belt narrower in diameter than the skirt of a piston designed for a diesel engine?（）A
To allow for greater expansion due to higher operating temperatureB
To seal the cylinder against leakage of combustion gasesC
To provide an additional surface for oil coolingD
To provide an additional strength for the crown and lower structure
考题
单选题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.A
it has a longer power strokeB
more air gets into the cylinder each strokeC
it develops twice as many power strokes at the same speedD
higher combustion pressure is developed
考题
单选题In a diesel engine, excessive cylinder liner wear will cause （） Ⅰ.increased blow-by Ⅱ.wear between the piston ring and grooveA
Ⅰonly is correctB
Ⅱ only is correctC
both Ⅰ and Ⅱ are correctD
neither Ⅰ or Ⅱ are correct
考题
单选题The diesel engine is a type of （）.A
turbine engineB
gas turbineC
steam engineD
internal combustion engine
考题
单选题Compared to a naturally aspirated diesel engine, a supercharged diesel engine has（）A
a cylinder air charge of higher pressureB
increased pumping lossesC
less valve overlapD
reduced blow-by
考题
单选题Proper dispersion of fuel in a diesel engine cylinder is dependent upon the （）A
injection pressureB
shape of combustion spaceC
turbulence in combustion spaceD
all of the above
热门标签
最新试卷