Engineering, Control Systems. Test 27

What is referred to as 'masking' of Diesel engine inlet and exhaust valve heads?

When the valve edge becomes very thin.
When the valve seat becomes recessed into the head.
Build up of carbon on the valve stems.
Build up of carbon on valve seats.

What is the final engine test before starting the main engine for departure?

Put out the turning gear and turn the lubricators.
Blow indicator cocks, test reversing of engine, short firing kick.
Close safety valves, blow indicator cocks, fill air bottles
Open air to engine, drain air bottles, blow indicator cocks

What is the main function of the lub oil priming pump on a Diesel engine?

Circulate oil after overhaul.
Circulate oil system for starting.
Priming lub oil filters after cleaning.
Stand-by lub oil pressure pump.

You have checked the oil viscosity in an auxiliary engine with the viscosity test kit. The result shows that the viscosity is low. What will you do ?

Start to purify the oil.
Increase the lubrication oil temperature.
Decrease the lubrication oil temperature.
Clean the system and change the oil.

Why is it so important to maintain air start lines clear of oil?

Air start valves could jam.
Increased risk of fire in compressed air
Joints could be damaged.
Air start distributor valve could seize

Why can the temperature of the scavenge air after the scavenge air cooler not be lowered below a given temperature and why has the temperature to be regulated above this value ?

To avoid misfiring and starting problems.
To maintain the thermal efficiency of the diesel.
To avoid condensate and water entering the engine.
To avoid cracking of the cylinder liner.

What is the purpose of the starting valve fitted on the cylinder head of a diesel engine ?

To allow starting air of 25 kg/cm2 into the cylinder when starting.
To activate the main air starting valve fitted on the engine.
To block the fuel and air supply unless in 'START' position.
To allow air from the main air bottle to enter the cylinder directly.

In an 'impulse type' exhaust gas turbocharger, the exhaust gases of the main engine _____

are driving only one single turbocharger.
are led in pipe groups directly and separately to the turbocharger.
are entering into a spacious exhaust gas manifold.
are led to two or three sections of the exhaust gas manifold.

Review Answers

Engineering, Control Systems. Test 27

Engineering, Control Systems. Test 27

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