When backing a motor propelled lifeboat (right-hand propeller) with the rudder amidships，the stern will back（）.

A、A.straight

B、B.to port

C、C.to starboard

D、D.None of the above

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第1题

[单选题] “380V/220V Y/△” noted on the nameplate of a non-synchronous motor means that（）

A、the armature terminals of the motor should be connected in star formation when voltage of power supply is 380 B、the armature terminals of the motor should be connected in star formation when voltage of power supply is 220 C、both A and B are correct D、the armature terminals of the motor should be connected in reverse ways of A and B

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第2题

[] The overcurrent relay （） the motor contactor when the motor exceeds its rated current.

A、A.connects B、B.trips C、C.fouls D、D.destructs

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第3题

[单选题] When a refrigeration compressor motor fails to start, the FIRST thing that should be checked for is a （）.

A、loose expansion valve control bulb B、low differential setting on the H-Pcutout C、blown fuse in the motor circuit D、faulty suction pressure regulator

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第4题

[] 外流活门的哪个马达直接受座舱增压面板控制？

A、A、MOTOR3 B、B、MOTOR1和MOTOR2 C、C、MOTOR1

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第5题

[] A generator is prevented from becoming motorized by the use of a/an （）.

A、A.over-speed trip B、B.reverse power relay C、C.back pressure trip D、D.governor controls

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第6题

[单选题] In cargo crane, （） for lifting the load.

A、a hoisting motor B、a luffing motor C、a mooring motor D、a slewing motor