2.1 Engine mechanical, cooling and lubrication 1

Bubbles in the cooling system would indicate?

• A faulty head gasket

• A faulty sensor

• A faulty thermostat

• A leaking hose

Excessive blue smoke emitted from the exhaust could be caused by?

• Worn big end bearings and crankshaft

• Worn little end bearings crankshaft

• A worn head gasket and cylinder head

• Worn piston rings and cylinder bores

Coolant in the oil sump could come from?

• Faulty head gasket

• Worn cylinder bores

• Worn pistons and rings

• Worn valves and guides

A puff of blue smoke emitted on start up could be caused by?

• Worn pistons and rings

• Worn big end bearings and crankshaft

• Worn rocker cover gasket

• Worn valve stem oil seals

White smoke being emitted from the exhaust could indicate that the engine is burning?

• Oil

• Petrol

• Paraffin

• Coolant

A typical oil grade for a SI engine is?

• SAE DW40

• SAE 75/80

• EP 90

• SAE W10/40

A compression test is used to measure

• The compression ratio

• Valve timing

• The cylinder operating pressure

• Fuel consumption

An oil pressure relief valve is fitted to:

• Maximise the oil pressure delivered to the galleries

• Reduce the oil pressure delivered to the galleries

• Maintain the correct oil pressure delivered to the pistons

• Reduce the oil pressure delivered to the pistons

Honing is a technique which is used to do what?

• Increase bore size

• Remove grease from the cylinder bore

• Remove the glaze from the cylinder bore

• Increase the size of the pistons

Torque is measured in

• KV

• KΩ

• Nm

• Nq