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 compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
A
BDC
B
TDC
C
BBDC
D
ATDC
参考答案
参考解析
解析：
暂无解析
更多 “单选题The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.A BDCB TDCC BBDCD ATDC” 相关考题
考题
The air cylinder bottles in the survival craft should be refilled with ______.A.oxygenB.nitrogenC.compressed airD.nitrogen and oxygen
考题
Fuel is admitted to a diesel engine cylinder through the ______.A.injector nozzlesB.carburetorC.exhaust portsD.intake valves
考题
______device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.A.An automaticB.A transmissionC.A self-regulatingD.An interlocking
考题
How does combustion air enter the cylinder of a two-cycle diesel engine ? Through _______．A.Cylinder head valvesB.PortsC.Turbo chargersD.Bleeder valves
考题
单选题The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.A
the cylinder headB
the cross-headC
the moving pistonD
the stationary piston
考题
单选题（） device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.A
An automaticB
A transmissionC
A self-regulatingD
An interlocking
考题
单选题When used in conjunction with a turbocharger, the main function of an after-cooler is to （）A
increase the density of the cylinder air chargeB
prevent turbocharger overheatingC
liminate the need for a pre-coolerD
remove moisture from air compressed by the turbocharger
考题
单选题When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）A
intake strokeB
compression strokeC
power strokeD
exhaust stroke
考题
单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）A
Holding the valve open for a long periodB
Increasing the starting air pressure usedC
Opening the stating air valve quicklyD
Reducing the starting air valve size
考题
单选题Restrictions occurring in the small orifices of pneumatic control system components can be used by （）A
moisture in the compressed air supplyB
excessive dryness in the compressed air supplyC
pressure surging in the compressed air receiverD
insufficient lubrication of the system components
考题
单选题When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）A
suction strokeB
compression strokeC
power strokeD
exhaust stroke
考题
单选题Opening of the cylinder （） will admit compressed air into the cylinder.A
safety valveB
indicator cockC
blow-down valveD
start valve
考题
单选题In the starting system, the automatic valve is controlled by（）, and the cylinder start valves are controlled by（）A
pilot air；pilot airB
handle；solenoidC
handle；pilot air coming through the distributorD
solenoid；pilot air coming through the distributor
考题
单选题Compressed air is supplied by air compression to （）.A
the air receiversB
the starting valvesC
the cylinder coversD
the distributors
考题
单选题It is very necessary that each cylinder （） before the charged air is compressed.A
is scavengedB
has been scavengedC
be scavengedD
was scavenged
考题
单选题It is very necessary that each cylinder （） before the charged air is compressed.A
is scavengedB
is atomized with fuel oilC
be scavengedD
be atomized with fuel oil
考题
单选题The（） only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.A
central air condition systemB
high velocity systemC
low velocity systemD
single duct system
考题
单选题On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）A
cooling jacketB
cylinder linerC
piston crownD
cylinder cover
考题
单选题Fuel is admitted to a diesel engine cylinder through the （）.A
intake valvesB
carburetorC
exhaust portsD
injector nozzles
考题
单选题Air compressor cylinder un-loaders enable the compressor to （）.A
vary their speed according to temperature and loadB
start and come up to speed before air compression beginsC
change speed according to overload demandsD
reduce compressed air charge density
考题
单选题The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）A
direction of air flow within the cylinderB
sequence of port openingC
method of opening exhaust portsD
volume of air admitted to the cylinder
考题
单选题In the suction stroke air is induced into the cylinder （）In the compression stroke the air is compressed.A
by an fuel valveB
through an inlet valveC
with an exhaust valveD
from an outlet valve
考题
单选题Fuel injected into a diesel engines cylinder is ignited by （）.A
the heat compressed fuel/air mixture in the cylinderB
the fuel igniterC
the fuel injectorD
the fuel pump
考题
单选题The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.A
camshaft；fresh airB
camshaft；starting airC
electronic motor which is controlled by a computer；fresh airD
electronic motor which is controlled by a computer；starting air
考题
单选题It is very important that each cylinder should be （） scavenged before the charged air is compressed.A
wellB
goodC
excellentD
respectively
考题
单选题Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.A
the power strokeB
the compression strokeC
low load operation onlyD
periods of standby
考题
单选题Usually we take the cooling effect of the air flown through the cylinder during the overlap period as（）A
inevitableB
harmfulC
helpfulD
unacceptable
热门标签
最新试卷
