Main Propulsion, Turbines, Boilers. Test 1

What characterizes a 2 stroke diesel engine ?

A 2 stroke engine always has 2 or more turbochargers.
A 2 stroke engine has an air inlet valve in the cylinder cover.
A 2 stroke engine has an ignition every time the piston reaches its top position.
The piston always has a short skirt.

In a Burmeister & Wain main engine, at what point is cylinder oil injected?

The starting air valve is fitted for the purpose of:

Bringing the engine up to sufficient number of revolutions for combustion to take place and engine to run.
To retard the engine revolution for manoeuvring purpose.
Turning the engine for starting preparations.
Bringing the engine up to full rpm to start the engine.

What is the meaning of the term 'valve clearance'?

The clearance between valve spindle disc and seat.
The clearance between the rocker arm and valve pushrod in either warm or cold state.
The clearance between the rocker arm and valve pushrod.
The clearance between the rocker arm and camshaft pushrod.

What is the purpose of the cylinder head safety valve?

To relieve excessive high pressure in the cylinder to protect the engine from being damaged.
A valve for safety stop (emergency) of the engine.
For indication of engine being overloaded.
To adjust the cylinder pressure to a safe working pressure.

What characterizes a 2 stroke diesel engine ?

A 2 stroke engine always has 2 or more turbochargers.
A 2 stroke engine has an air inlet valve in the cylinder cover.
The piston always has a short skirt.
A 2 stroke engine has an ignition every time the piston reaches its top position.

What is the main task of the lubrication oil in the engine?

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