Engineering, Control Systems. Test 6

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

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

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

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

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

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

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

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

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
More fuel-efficient
Affords a better engine layout
Less complicated than medium speed engines

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

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

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 ?

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

Review Answers

Engineering, Control Systems. Test 6

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