172 Engines L3

What is the maximum fuel pressure of a CI common rail engine?

• 3 BAR

• 180 BAR

• 1800 PSI

• 2500 BAR

What is likened to the LT of a SI system on a CI fuel system?

• Lift pump

• Timing pump

• Low tension diesel

• Spill return

Why is there a spill return on a CI engine?

• Reduces pressure in rail

• It enables flame spread

• Lubricates fuel system

• Diverts to filter

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 exhaust part that reduces soot from a diesel engine?

• DPF

• PDF

• SCR

• Catalyst

Which converter is at front?

• Oxidisation converter

• Reduction converter

• DPF

• Knock sensor

What harmful gas does the reduction converter convert?

• Oxides of nitrogen

• Nitrogen oxides

• Carbon monoxide

• Nitrogen

Catalytic converters work at what temperature?

• 300°F

• 300°C

• 180°C

• 1800°C

What does a Lambda sensor measure?

• Oxygen

• Hydrocarbons

• Carbon

• Nitrogen

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