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
The process to remove exhaust gases by blowing in fresh air is called （）.
A
charging
B
supercharging
C
starting
D
scavenging
参考答案
参考解析
解析：
暂无解析
更多 “单选题The process to remove exhaust gases by blowing in fresh air is called （）.A chargingB superchargingC startingD scavenging” 相关考题
考题
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine byA.natural aspirationB.masked intake valvesC.air ceilsD.scavenging air
考题
A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four strokeA.①B.②C.① and ②D.Neither ① nor ② is correct
考题
Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．A.warm up the exhaust blower motorB.provide a proper supply of fresh air for the engine（s）C.see the system is in good operating conditionD.insure at least one complete change of air in the compartments concerned
考题
单选题Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）A
natural aspirationB
masked intake valvesC
air cellsD
scavenging air
考题
单选题The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.A
behindB
far fromC
adjacent toD
in front of
考题
单选题The process to remove exhaust gases by blowing in fresh air is called （）.A
chargingB
superchargingC
startingD
scavenging
考题
单选题In a four-stroke/cycle diesel engine, after the completion of the power stroke, the piston will move（）A
up and draw in a fresh air chargeB
down to burn off fuelC
down to compress the fuel air chargeD
up and force out the exhaust gases
考题
单选题Air blowing from the intake air filter of an operating air compressor indicates （）.A
broken inlet valvesB
broken discharge valvesC
pulsations in the air distribution systemD
overloading of the air distribution system
考题
单选题（） is the removal of exhaust gases by blowing in fresh air.A
Gas exchangeB
ChargingC
ScavengingD
Supercharging
考题
单选题A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) MEP is lower and the scavenging air is cooling the exhaust gases (2) valve overlap in a four-strokeA
(1) only is correctB
(2) only is correctC
both (1) and (2) are correctD
Neither (1) or (2) are correct
考题
单选题Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.A
scavengingB
startingC
coolingD
blowing
考题
单选题The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）A
provide exhaust back pressureB
prevent exhaust smoke emissionsC
power a reciprocating superchargerD
muffle exhaust gas noise
考题
单选题The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）A
pumping action of the pistonB
pressure of the fuel chargeC
vacuum developed in the manifoldD
pressure of the fresh air charge
考题
单选题Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.A
chargingB
super chargingC
scavengingD
exhausting
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With supercharging a larger mass of air is supplied to the cylinder by blowing it in under pressure, which is the best means to （） of the engine.A
increase the exhaust temperatureB
increase the power ofC
reduce the speedD
increase the fuel consumption
考题
单选题"Scavenging" on a diesel engine means （）.A
injecting fuel oil into a cylinderB
removing exhaust gases from the cylinderC
forcing air into the cylinders under pressure after the exhaust valve has dosedD
a combination of all the above
考题
单选题Scavenging is （） of exhaust gases by blowing in fresh air.A
the suctionB
the compressionC
the removalD
the deliver
考题
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）A
the supply of normal air and removal of compressed airB
the supply of fuel oil and combustion of the atomized oilC
the supply of fresh air and removal of exhaust gasesD
the supply of fresh air and removal of the extra heat
考题
单选题In motor ship, （） is often used to recover some of the heat carried in the exhaust gases from the main engine.A
an diesel oil heaterB
a waste heat boilerC
a fresh water generatorD
all the above
考题
单选题In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）A
exhaust manifoldB
valve bridgeC
pressure of the fresh air chargeD
valve adjusting gear
考题
单选题If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）A
immediately open all crankcase relief portsB
increase crankcase exhauster speed to draw cool air into the engineC
allow the engine to cool naturallyD
increase crank case scavenge air to remove unburned gases
考题
单选题In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.A
downwards；upwardsB
upwards；downwardsC
downwards；downwardsD
upwards；upwards
考题
单选题The process of scavenging a two-stroke/cycle diesel engine serves to（）A
improve fuel flow volumeB
cool the exhaust valvesC
reduce the intake air charge densityD
increase the temperature of exhaust gases
考题
单选题In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because （）.A
the beveled edges of the intake valves provide for serf-centering during seatingB
intake valves utilize stellite-coated valve seat inserts which reduce wearC
the volume of air passing through intake valves is less than the volume of air passing through exhaust valvesD
intake valves are less affected to the corrosive action of exhaust gases
考题
单选题Modern engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.A
are made ofB
are made fromC
make use ofD
are used to
考题
单选题A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longerA
(1) onlyB
(2) onlyC
both (1) and (2)D
neither (1) nor (2)
考题
单选题Modem engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.A
make use ofB
have made the use ofC
by means ofD
make advantage of
热门标签
最新试卷