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
防止气缸套低温腐蚀的方法主要有()。 ①减少活塞与缸套装配间隙; ②冷却水温不要太低; ③避免长时间低负荷运行; ④采用适当的碱性气缸油; ⑤在冷却水中加添加剂; ⑥冷却水压力要适当。
A
①+②+⑥
B
②+③+④
C
①+⑤+⑥
D
①+②+③
参考答案
参考解析
解析:
暂无解析
更多 “单选题防止气缸套低温腐蚀的方法主要有()。 ①减少活塞与缸套装配间隙; ②冷却水温不要太低; ③避免长时间低负荷运行; ④采用适当的碱性气缸油; ⑤在冷却水中加添加剂; ⑥冷却水压力要适当。A ①+②+⑥B ②+③+④C ①+⑤+⑥D ①+②+③” 相关考题
考题
单选题The AMVER system requires().A
Sailing plans to be sent before departureB
More frequent reports in heavy weatherC
Arrival reports to be sent within 8 hours of arrivalD
A position report within 24 hours of departure
考题
单选题If the ship is delayed by reason of Charterer’s failure to name a port,()will be liable for the damages.A
the ownerB
the ChartererC
the shipperD
the carrier
考题
单选题Safe welding practice requires ()A
checking the area for items that may catch fireB
that a fire watch be postedC
checking for the explosive gasesD
all of the above
考题
单选题制定特殊规则的机构或组织被授权制定和实施特殊规定的主体是()各缔约国或参加国的“有关主管机关”。A
《1972年国际海上避碰规则公约》B
《1973年国际海上避碰规则公约》C
《1974年国际海上避碰规则公约》D
《1975年国际海上避碰规则公约》
考题
单选题Combustion knock will most likely occur as a result of using a fuel with()A
low ignition qualityB
a high volatilityC
low ignition delayD
a high cetane number
考题
单选题A rectangular area is described in degrees of latitude and longitude from the latitude and longitude of the southwest corner of().A
squareB
triangleC
circleD
rectangle
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The refrigerating agent can () at low temperature in the evaporator.A
expandB
evaporateC
condenseD
distil
考题
单选题The number of cycles per second occurring in AC voltage is known as the ()A
phase angleB
frequencyC
wave formD
half mode
考题
单选题Aboard damage vessels, the most important consideration is preserving().A
bilge pumping capacityB
reserve buoyancyC
level attitudeD
instability
考题
单选题对需要进行拖曳作业的船舶,在下列情况下轮机员操作正确的是()。 a.自航时不能利用柴油机的全功率,否则超速; b.拖曳时可以利用柴油机的全功率,不会超负荷; c.自航或拖曳作业均应适当减小油门; d.拖曳作业只需保持标定油门; e.自航时适当减小油门是为了防止超负荷。A
a+b+eB
a+b+dC
a+cD
a+b
考题
单选题Proper operation of the main engine reduction gear set requires the operation to monitor ()A
the sump oil levelB
oil flow sight glassesC
bearing temperaturesD
all of the above
考题
问答题已知某内河船船模长4m,湿面积4.6m2,缩尺比α=36,在试验水池中速度为1.8m/s时测得总阻力为3.6kgf,求:实船相应航速、总阻力、有效马力(摩擦阻力按1957ITTC公式;不考虑粗糙度补贴,ν=1.3064*10-6m2/s,ρ=999.63kg/m)
考题
问答题往复泵为何要设空气室?对空气室的使用管理上应特别注意什么问题?
热门标签
最新试卷