Auxiliary Machinery. Test 43 – Online Maritime Tests

When should the recirculation of air from the accommodation be set to 100 % and the fresh air intake totally closed ?

During cargo operations or cargo transfer in port or at sea.
When outside temperature is more than 36 degree C.
When outside temperature is more than 30 degree C.
When vessel is moored at an oil refinery.

What parameter is controlling the capacity control system of this domestic refrigerating compressor?

The discharge pressure of the compressor.
The temperature and back-pressure of the condensor.
The temperature in the refrigerated rooms.
The suction pressure of the compressor.

What burner equipment item operating when the ignition indication light is illuminated on this boiler's control panel ?

The recirculating valve 'R'.
The compound regulator 'CR'
The pilot burner 'PB'
The fuel solenoid 'S'

The exhaust steam line of one of the consumers shown in this drawing will not return via the atmospheric condenser but direct via a water trap to the hot well. Which one ?

M.E. heating.
Purifiers.
Laundry.
Viscorator.

What is the state of the refrigerant which flows from the condenser to the solenoids and the expansion valves ?

It rises above the condenser pressure and decreases in temperature.
It is below condenser pressure and condensed.
It is under condenser pressure and undercooled.
It is hot and undercooled.

Freon is being phased out gradually as a refrigerant. Why ?

Because it has a damaging effect on the Earth's ozone layer.
Because under certain conditions it is toxic.
Because it is being replaced by more efficient refrigerants.
Because it is too expensive.

You are notified that it is getting hot in the accommodation and the air conditioning is not working. What do you check immediately ?

If the aircon compressor is still running.
If the accomodation vent fans are running.
If suction and discharge pressures on the compressor are normal.
If there is sufficient refrigerant in the system.

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