Auxiliary Machinery. Test 70 – Online Maritime Tests

This electric circuit is part of the Steering Gear Control System, in which the output is either 1 or 0 as either solenoid 1or 2 is energized. It is an example of what kind of circuit ?

Two Potentiometers with amplifier relays.
A Wheatstone Bridge.
A booster aggregate.
Two double resistor circuits balanced by the solenoids.

The Sharples separator, shown left and the Disc type separator, shown right, both run at high RPM. But which runs at the highest speed ?

Both run at the same RPM.
It depends for which kind of oil gravity either is used.
The Sharples runs at a higher RPM.
The DISC type runs at a higher RPM.

The first potentiometer of this electric command system is located on the bridge. By what mode might it be actuated?

By automatic steering via the auto-pilot.
By hand steering.
By push button steering.
By any of these steering methods.

What do you call the valve that prevents steam pressure from exceeding the allowable working pressure?

The main steam stop valve.
The steam regulator valve.
The safety valve.
The steam pressure reducing valve.

During normal operations, the command rod 'C' pushes point 'Z' and the control rod off centre so that the 'HS' pumps start pumping and the steering gear moves. When will it stop moving ?

When the command rod 'C' moves in opposite direction.
When the command rod 'C' stops moving.
When the trunion point 'Y' pushes point 'Z' back to its original position.
When the rudder angle indicator corresponds to the command.

Testing boiling water for chloride content will indicate the amount of _____

solids in the water as a result of sea water contamination.
dissolved solids in total present in the water.
alkalinity level.
phosphate present in the water.

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