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
关于制冷系统下列说法中错的是()。
A
当贮液器在冷凝器下不远,接管较粗时可不设平衡管
B
氨制冷装置不设回热器
C
R22制冷装置设回热器可提高制冷系数
D
R134a制冷装置不用硅胶作干燥剂
参考答案
参考解析
解析:
暂无解析
更多 “单选题关于制冷系统下列说法中错的是()。A 当贮液器在冷凝器下不远,接管较粗时可不设平衡管B 氨制冷装置不设回热器C R22制冷装置设回热器可提高制冷系数D R134a制冷装置不用硅胶作干燥剂” 相关考题
考题
单选题Which statement comparing a shipboard crane to conventional gear is TRUE().A
Cranes are more difficult to secure for seaB
The spotting area of the conventional gear is largerC
A crane operator requires more training than the winch operator of a yard and stay rigD
The yard and stay rig is more flexible in its ability to handle a wider variety of cargoes
考题
单选题The evaporating pressure in R22 vapor compression refrigeration plant should be () atmospheric.A
belowB
aboveC
equal toD
much larger than
考题
单选题During the watch at sea, where situations occur in the machine apace which may affect the speed maneuverability, power supply or other essentials for the safe operation of the ship()should be informed as soon as possible.A
the chief engineerB
the masterC
the bridgeD
the company superintendent
考题
单选题气缸套内部受燃气加热,外部被水冷却,内外表面间温差Δt,则缸套内外表面的热应力为()。A
内表面切向拉应力,外表面切向压应力B
内表面径向压应力,外表面径向拉应力C
内表面切向压应力,外表面切向拉应力,内外表面径向应力为零D
内表面径向拉应力,外表面径向压应力
考题
单选题When a boiler is operating, the water level in the gauge glass reads () when the boiler is shut down.A
lower thanB
higher thanC
as much asD
the same as
考题
单选题The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel().A
ascending the riverB
descending the riverC
crossing the riverD
proceeding towards sea
考题
单选题在实际航运中,某轮某两个航次No.1货舱分别装满货物A、B,积载因数分别为S.Fa、S.Ab,该舱的重心高度分别为Za、Zb,则()。A
ZaB
ZaZbC
Za=ZbD
关系无法确定
考题
单选题在采取避让行动时,对航向作了一连串的小变动的做法,是属于:()A
对遵守《国际海上避碰规则》各条的疏忽B
对海员通常做法可能要求的任何戒备上的疏忽C
对特殊情况可能要求的任何戒备上的疏忽D
一种良好的船艺
考题
单选题实施法定检验的依据不包括()。A
SOLAS公约B
ILL公约C
MARPOL公约D
口岸检查办法
热门标签
最新试卷