Auxiliary Machinery. Test 61

Why should refrigerator compressor oil be stored in small capacity drums?

Ease of stowage.
Only small quantities are required.
Ease of handling.
Refrigerator oil is hygroscopic and should not be stored in part full drums.

What is the maximum salinity allowable (in ppm) for water produced by this fresh water generator when it is to be used in medium pressure water tube boilers ?

7 ppm.
15 ppm.
20 ppm.
2ppm.

How do you test the probes for the 15 ppm monitor ?

By immersing in oil.
It is only necessary to clean them.
They have to be changed, onboard testing is not possible.
By checking in air and immersing in water.

Whilst taking over of the watch, besides verifying standing orders and the actual condition of the plant, tank levels and operations, what other important matter should you verify?

Where are the leakages in pipes, tanks and equipment.
If any workis being performed in the engine room.
What is the firefighting equipment in state of readiness.
That the bilges of all wells pumped.

Flash point of oil is the temperature at which _____

flammable vapours form at its surface.
it should be stored in a pressurised tank.
It will ignite in the cylinder.
condensation occurs.

Review Answers

Auxiliary Machinery. Test 61

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