Auxiliary Machinery. Test 60 – Online Maritime Tests

When an overhaul of a compressor is completed and the compressor is to be started for a test run, it is important to _____

check the maximum pressure of the capacity on run-up.
check that all air receiver outlets are closed during the test run.
check that an open discharge line exists through to the receiver.
check the direction of rotation.

What will you do if the plate exchanger leaks when returned to service after cleaning?

Close the valves.
Dismantle the exchanger, check or renew packings.
Tighten more.
Reduce pressure.

What type of pump is the distillate water pump, item No 7, and at what pressure is it discharging the liquid?

Centrifugal pump under pressure.
Vane pump, under pressure.
Vane pump, under vacuum.
Centrifugal pump, under vacuum.

Prior to starting the distillate pump, item No 7, it is necessary to make sure that _____ in order to avoid the pump running dry.

water is visible in the sight glass of the evaporator.
the discharge valve of the pump is shut.
the vacuum in the evaporator is still minimum.
the evaporator is full and under presuure.

When taking over the watch as duty engineer, what would you check first, before inspecting the plant condition?

The engine room bilges.
The fire alarm monitoring equipment.
The Chief Engineer's standing orders and special instructions.
The log book entries from the previous watch.

When starting up a fresh water generator it often happens that the distillate pump fails to pump out the produced water. This could be caused by _____

the vacuum being too high in the fresh water generator.
the fresh water generator being too high.
an air leak on the shell and grease needs to be applied.
the pump is drawing in air through a leaking shaft seal.

Why is the presence of oil particularly dangerous in starting air lines?

It could affect the operation of the relief valves.
It may carbon up and choke the lines.
It may cause sticking of the air start valves.
The high oxygen content makes it very explosive.

If oil is found in the auxiliary boiler water, what action would you take other than isolating the leak ?

Skim and blow down the boiler.
Dose the coagulant.
Stop any chemical treatment.
Dose the coagulant, skim and blow down the boiler.

When you start a purifier it takes several minutes to accelerate to full speed since the power from the electric motor is transferred by _____ to the purifier.

a rotating coupling
a magnetic coupling
a plate clutch
a centrifugal clutch

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