Auxiliary Machinery. Test 60

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

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

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

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

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

Dose the coagulant.
Dose the coagulant, skim and blow down the boiler.
Stop any chemical treatment.
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 centrifugal clutch
a magnetic coupling
a plate clutch

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 _____

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

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 the direction of rotation.
check that an open discharge line exists through to the receiver.

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

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

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

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

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

Review Answers

Auxiliary Machinery. Test 60

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