Engineering, Control Systems. Test 4 – Online Maritime Tests

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

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?

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

What is meant by an engine's critical speed?

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

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

Why is the ash content of a fuel oil significant?

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.
Is non-combustible and remains partly in the engine.
Is useful for determining proper atomisation temperatures.

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

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

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