Engines L2

What controls the opening of the valves ?

• Buckets & Shims

• Camshaft Lobes

• Cambelt

• Ignition timing

The main components of the piston and connecting rod (excluding the piston & connecting rod assembly are:

• Gudgeon pin, main bearing, small end, piston bosses, crankshaft web

• Piston rings, gudgeon pin, big end, small end, crankshaft journal

• Piston rings, combustion chamber, small end, big end, piston bosses

• piston rings, gudgeon pin, big end, small end, piston bosses

On a four stroke engine during the compression phase, which statement is correct?

• Pressure will increase but temperature will remain constant

• Pressure and temperature will remain constant

• Pressure and temperature will increase in the cylinder

• Pressure will remain constant but the temperature will increase

The valve clearance affects valve timing it is necessary due to the expansion of the engine parts due to heat

• True

• False

Which one of the following statements in relation to the four stroke cycle is false;

• Inlet Valve opens on the induction stroke

• Valve overlap occurs when both inlet & exhaust valves are open

• The exhaust valve opens on the firing stroke

• The inlet valve opens on the exhaust stroke

What type of engine is this ?

• In-line four cylinder engine

• A vee engine

• A horizontaly opposed engine

• Upside down engine

What is the firing order for cylinder petrol engine?

• 1,2,3,4

• 1,2,4,3

• 1,4,2,3

• 1,3,4,2

What is the second stroke of the four stoke cycle

• Induction

• Exhaust

• Power

• Compression

Hemispherical combustion chamber has a small surface area, heat loss is kept to a minimum therefore a higher thermal efficiency is achieved and larger valves can be used;

• True

• False

When the spark plug ignites the mixture in the cylinder, which component is the energy transferred to?

• Piston rings

• Exhaust valve

• Piston

• Inlet valve