Engineering, Control Systems. Test 6

During operation of the main engine, the exhaust temperature increases on one of the cylinders. The turbocharger starts surging and smoke is coming from the inlet air filter. What is the probable cause ?

Turbocharger failure.
Fuel valve seized in open position.
High back pressure in the exhaust system.
Scavenge box fire.

When carrying out piston overhaul, why it is important to clean the ring grooves properly?

To make the ring fit in the groove.
To make sure gas pressure can enter freely on top of and behind the piston ring .
All rings must be changed to make a perfect sealing.
So that the piston rings can move freely in the grooves.

What is the function of valve 'PR' in this fuel circuit ?

A de-gassing/ HP gas release by very high fuel temperature.
A fuel drain valve in case of engine shut-down.
A constant pressure regulating valve.
A safety blow-off valve in case of Emergency Stop.

In the case of a serious main engine malfunction what would be your course of action?

Attempt to rectify the fault.
Stop the engine immediately and investigate the cause.
Slow down the engine and attempt to rectify the fault.
Inform the bridge watch keeper before taking any action.

Which of the following is the distance between the piston and the cylinder head when the piston is at bottom dead center ?

Compression clearance.
Cylinder clearance.
Any of these.
Combustion clearance.

On a Bosch type fuel injection pump how does the rack adjust the fuel delivery?

By altering the opening and closing of the delivery valve.
By increasing the delivery pressure.
By altering the length of time the fuel pump roller contacts the cam.
By altering the effective stroke of the plunger.

Why is a slow speed two stroke diesel the most suitable for a single fixed pitch propeller vessel?

Easier to reverse and no propulsion gearbox required
Affords a better engine layout
More fuel-efficient
Less complicated than medium speed engines

Review Answers

Engineering, Control Systems. Test 6

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