![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
[主观题]
Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?
A.Sealed motors
B.Drip proof motors
C.Enclosed motors
D.Watertight motors
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.Sealed motors
B.Drip proof motors
C.Enclosed motors
D.Watertight motors
第1题
A.air chamber
B.head lank
C.primer
D.prime mover
第2题
A.both generate alternating voltages
B.both rectify the voltage before delivery
C.are constructed at the same physical size for the same kilowatt rating
D.both supply three-phase power
第3题
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
第4题
A.open the bypass line
B.cut in the lube oil cooler
C.pressurize the lube oil system
D.top off the expansion tank
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!