Common Rail Diesel Systems Quiz

What is the primary function of the rocker arm in a mechanical unit injection system?

• To control the fuel rail pressure

• To regulate the air intake

• To hit the plunger and inject fuel

• To monitor engine temperature

What does the acronym 'HEUI' stand for?

• Hydraulic Engine Unit Injection

• High Efficiency Unit Injection

• High Energy Unit Injection

• Hydraulic Electric Unit Injection

What is the main advantage of common rail systems over older injection systems?

• Lower manufacturing cost

• Higher flexibility for power demands and idle capabilities

• Simpler design

• Lower fuel consumption

What is the role of the electronic solenoid in a HEUI system?

• To regulate engine temperature

• To control the air intake

• To actuate the plunger

• To monitor fuel quality

What is the purpose of the fuel water separator in a diesel engine?

• To increase fuel pressure

• To filter air intake

• To cool the engine

• To separate water from diesel fuel

What is the function of the volume control valve in a high-pressure fuel pump?

• To monitor engine temperature

• To control the total volume of fuel allowed into the pump

• To regulate air intake

• To control the exhaust system

What is the main purpose of the pressure relief valve in a common rail system?

• To prevent overpressure in the fuel system

• To regulate engine temperature

• To increase fuel efficiency

• To monitor fuel quality

What is the primary role of the fuel rail pressure sensor?

• To monitor the air intake

• To measure the pressure in the fuel rail

• To control the exhaust system

• To regulate engine temperature

What is the function of the lift pump in a diesel engine?

• To monitor engine temperature

• To control the exhaust system

• To pressurize fuel from the tank to the primary fuel filter

• To increase air intake

What is the purpose of the fuel filter in a diesel engine?

• To increase fuel pressure

• To regulate air intake

• To filter out impurities from the fuel

• To cool the engine