更多"The compressed air is admitted to e"的相关试题:
[单项选择]（） supplies pilot air to control the cylinder air start valves.
A. An air compressor
B. An indicator cock
C. An air distributor
D. A safety valve
[单项选择]The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
A. Low compression pressure and high exhaust temperature
B. Low firing pressure and high exhaust temperature
C. Low compression pressure and low exhaust temperature
D. Low firing pressure and low exhaust temperature
[单项选择]The rate of wear on a cylinder liner depends on the （）
A. quality of air filtration
B. effectiveness of lubrication
C. type of fuel used
D. all of the above
[单项选择]Each cylinder in a two stroke cycle engine experiences combustion（）.
A. once each crankshaft revolution
B. twice each crankshaft revolution
C. every other crankshaft revolution
D. every fourth stroke
[单项选择]It is very important that each cylinder should be （） scavenged before the charged air is compressed.
A. well
B. good
C. excellent
D. respectively
[单项选择]Each cylinder liner on the marine medium speed engines （）.
A. is usually cooled by sea water
B. can be replaced when worn out
C. is in direct contact with the water in the bore of the cylinder
D. can t expand when heated
[单项选择]Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
A. nuts and bolts
B. new joints
C. spring force
D. sealing rings
[单项选择]In each cylinder cover is a large central opening for mounting （）
A. the indicating cock
B. the starting valve
C. air inlet valve
D. the exhaust valve
[单项选择]The starting air entering the cylinder begins when the piston（）
A. has nearly come to the TDC
B. has just past the TDC
C. has nearly come to the BDC
D. has just past the BDC
[单项选择]Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.
A. charging
B. super charging
C. scavenging
D. exhausting
[单项选择]The air cylinder bottles in the survival craft should be refilled with（）.
A. oxygen
B. nitrogen
C. compressed air
D. nitrogen and oxygen
[单项选择]The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.
A. the beginning of the compression stroke
B. the beginning of the suction stroke
C. the end of the working stroke
D. the end of the exhaust stroke
[单项选择]There is an injection pump for each cylinder, which is usually operated once every cycle by （） on the camshaft.
A. a gear
B. a cam
C. a rod
D. a miler
[单项选择]It is very necessary that each cylinder （） before the charged air is compressed.
A. is scavenged
B. is atomized with fuel oil
C. be scavenged
D. be atomized with fuel oil
[单项选择]In each cylinder cover there are two or three holes for （）
A. the exhaust valves
B. the fuel valves
C. indicator cocks
D. the fuel pumps
[单项选择]Air compressor cylinder un-loaders enable the compressor to （）.
A. vary their speed according to temperature and load
B. start and come up to speed before air compression begins
C. change speed according to overload demands
D. reduce compressed air charge density
[单项选择]When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.
A. just
B. nearly
C. merely
D. already
[单项选择]Air scavenging of a diesel engine cylinder（）
A. blows out the exhaust gases
B. supplies oxygen for combustion
C. cools the valves and cylinder walls
D. all of the above
