LV2.2 fuel and ignition

Damage to a car occurs when an excessive amount of fuel enters the converter, a cause could be

• Misfiring

• pre-ignition

• Running too hot

• Running too fast

Which best describes the term octane rating?

• Stability of a diesel fuel

• Unstableness of fuel

• Is the combustion speed and compression needed for ignition

• Is a fuel's ability to resist ‘knock’ or detonation

Which statement best describes cetane rating?

• The heat that petrol can withstand before detonating

• Combustion speed of diesel & compression needed to ignite it

• How volatile the fuel is

• The calorific value of the fuel

The thermostatic valve opens at approximately what temperature? (Degrees celsius)

• 50

• 90

• 110

• 125

Which one of the following is NOT part of the high tension side of a Kettering system?

• Secondary coil winding

• Primary coil

• Spark plugs

• HT leads

What does the water pump do?

• Uses centrifugal force to pump coolant around the system

• Circulates water around the engine

• Creates the heat to warm the engine up

• Uses gravitational force to pump coolant around the system

When does the spark occurin the four stroke cycle?

• ATDC on power stroke

• BTDC on compression stroke

• BBDC on power stroke

• 3.15pm

What does a catalytic converter take in and what does it change it to?

• CO2 + N2 + 02 = CO+ NO + O2

• CO + N2 + H2O = CO2 + NO + HC

• CO + HC + NOx = CO2 + H2O + N2

• CO2 + HC + NOx = CO + H2O + N2

A leaking inlet manifold will cause?

• The engine to run lean

• Increased air filter life

• An increase in top speed

• The engine to run rich

MPI injection system usually has

• A carburetor

• Two injectors for each cylinder

• One injector for each cylinder

• A single injector shared by all the cylinders