Operate Alternators, Generators. Test 14

Give the reason why shore power and ship's power should never be run in parallel ?

What is the purpose of a ' Y/Delta ' starter ?

When you make a visit to the emergency diesel generator during your engine room watch, what should you look out for?

Radiator fresh water level, oil level in sump tank, preheating temperature of cylinders, charging level of batteries, diesel in stand-by mode.
That the voltage and the frequency displayed on the emergency switch board is the same as on the main switch board.
That the battery charger is not accidentally kept in ON position, that the door of the generator room is always closed behind you.
That the steam heater or electrical heater in the emergency diesel room is switched on.

What determines the speed in a squirrel cage AC motor?

A DC series motor is used to operate a pump driven with a belt, what happens if the belt breaks?

In these circuits current I1 and I2 are the same and all resistors R have the same value. In which circuit will the voltage be greater ?

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