Auxiliary Machinery. Test 81

Caution must be taken when handling purifiers since errors can cause great danger. Handle with due caution is required in operation, dismantling, assembling, inspection, maintenance. This is because _____

oils and fuels cause fire and explosion when handled carelessly. This danger is increase because the fuels and oils fed to purifiers is heated.
static electricity may be generated if parts are wrongly assembled causing explosion within the purifier.
danger of electrocution from the electric power supply to driving motor, various control solenoids and other required operational controls is great.
purifier bowls revolve at very high speed generating great centrifugal forces, careless handling causes danger of disintegration.

When the density of purified oil has increased, you should _____

increase the temperature and increase the gravity disc inside diameter.
increase the temperature and decrease the gravity disc inside diameter.
Decrease the temperature and increase the gravity disc inside diameter.
decrease the temperature and decrease the gravity disc inside diameter.

When taking over the engine room watch, what should you check concerning the heavy fuel supply to machinery and boilers ?

The temperatures of the settling tanks and daily tanks.
That the settling tanks and the daily service tanks are full.
The daily and settling tank levels, the purifier line-up and throughput, in order to ensure at least sufficient fuel supply to last your watch
That the settling tanks and daily tanks are at least for 75 % full.

When taking over the engine room watch, what should you check on the operational boilers when the exhaust gas boiler alone is providing the heat supply?

The boiler water level, the steam pressure and the exhaust gas change over flap position or coil percentage used.
The boiler water circulating pumps, the feedwater pumps and the feedwater temperature.
The economiser and superheater temperatures and the steam pressure.
The soot blowers, the economiser and the boiler furnace.

If some part of a purifier bowl assembly is defective, what action should be taken ?

Have it repaired on board if it can be done.
Send it to a qualified workshop for repair.
Order the specific bowl spare part.
Contact the makers for guidance and act on their advice only.

Review Answers

Auxiliary Machinery. Test 81

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