Year 3 Engine

What is the correct mixture (Stoichiometric) value?

• 14.7 parts fuel to 1 part air

• 14 parts fuel to 1.7 parts air

• 14.7 parts air to 1 part fuel

• 14.7 parts nitrogen to 1 part oxygen

What does a Lambda sensor measure?

• Oxygen

• Hydrocarbons

• Carbon

• Nitrogen

What is the exhaust part that reduces soot from a diesel engine?

• DPF

• PDF

• SCR

• Catalyst

What is so good about Piezo-electric injectors?

• They do not require high pressure

• They do not require pump

• They do not need filter

• They can give multiple injections

what is the throttle body Assembly position measured by

• ECU

• Electronic Throttle plate

• Idle control device

• potentiometer

What is pulse width modulation?

• how much fuel comes out of the injector

• The period the injector is open

• order of each injector opening

• all of the above

Which one of the following components is located on the 'high pressure' side of the diesel fuel injection system?

• Fuel pump

• Fuel tank

• Common Rail

• Fuel filter

What controls the opening and closing of the fuel injector in an electronically controlled fuel injection system?

• It is opened in time with the engine timing directly via the cambelt

• It is controlled by electrical signals from the ECU

• It is controlled by the in-line fuel filter

• It is controlled by the fuel pump in relation to engine timing

Which of the following is a benefit of having a pre-injection phase?

• Lower power output

• Longer ignition firing delay

• Increased exhaust emissions

• Lower combustion noise

What is being measured in the image?

• The integrity of the oil pan sealing surface

• The crankshaft's throw

• The crankshaft's radial run-out

• The crankshaft's end float