Engineering, Control Systems. Test 4 – Online Maritime Tests

What should be the first action on discovering a main engine malfunction?

Stop the engine and attempt to rectify the fault
Slow the engine, check pressures & temperatures
Inform the Chief Engineer
Inform the Bridge watch keeper

To avoid the possibility of a scavenge fire what important check is to be carried out every watch and more frequently if a damaged piston ring is suspected?

The scavenge drain flow through.
The cylinder lubrication.
The exhaust gas temperature.
Overhear the cylinder for noise.

Why is the ash content of a fuel oil significant?

Is useful for determining proper atomisation temperatures.
Is non-combustible and remains partly in the engine.
Indicates the quantity of energy released by burning a unit amount of the fuel.
Reflects the overall thermal efficiency of the fuel oil service system.

For this auxiliary diesel fresh water system, what method of temperature control is used ?

Controlling the outlet by regulating the outlet.
Controlling the inlet by regulating the inlet.
Controlling the inlet by regulating the outlet.
Controlling the outlet by regulating the inlet.

What is meant by an engine's critical speed?

Minimum allowable engine rpm.
Engine rpm that must be attained before the engine will fire.
Maximum allowable engine rpm.
Engine rpm at which the engine must not be operated for long periods.

Suppose Lubrication Oil Purifier No 2 is running M.E.L.O. sump tank to M.E.L.O. sump tank. Lubrication Oil Purifier No 1 is now to be set up for the other tank purification, which set up is not possible ?

M.E. Dirty Oil Tank to Dirty Oil tank
M.E. Dirty Oil tank to Lub. Oil sump tank
Aux Diesel Renovating Tank to Renovating tank
M.E. Lub Oil sump tank to Dirty Oil Tank

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