Common Rail Direct Injection (CRDI) Quiz

What is the primary purpose of the Common Rail Direct Injection (CRDI) system in diesel engines?

• Increase fuel consumption

• Reduce engine power

• Improve fuel efficiency and reduce emissions

• Increase engine noise

In a CRDI system, what component is responsible for delivering high-pressure fuel to the injectors?

• Fuel tank

• Fuel pump

• Common rail

• Fuel filter

Which of the following is NOT an advantage of CRDI systems?

• Lower fuel consumption

• Higher emissions

• Better engine performance

• Reduced engine noise

What does the "common rail" refer to in a CRDI system?

• A single fuel line supplying all injectors

• A type of injector nozzle

• A fuel filtration system

• An exhaust gas recirculation system

How does a CRDI system typically control fuel injection timing and quantity?

• Mechanically, using a camshaft

• Electronically, using an Engine Control Unit (ECU)

• Manually, using a throttle lever

• Hydraulically, using a pressure regulator

What is one of the main benefits of using high-pressure fuel injection in CRDI systems?

• Lower cost of components

• Increased engine size

• Better atomization of fuel

• Increased engine temperature

Which component in a CRDI system helps in maintaining consistent fuel pressure?

• Fuel filter

• Fuel pressure regulator

• Turbocharger

• Exhaust manifold

What role does the injector play in a CRDI system?

• It filters the fuel

• It stores the fuel

• It sprays fuel into the combustion chamber

• It compresses the air

What type of fuel is typically used in a CRDI system?

• Petrol

• Diesel

• Natural gas

• Ethanol

Which sensor in a CRDI system provides data about engine speed and crankshaft position?

• Oxygen sensor

• Crankshaft position sensor

• Fuel temperature sensor

• Exhaust gas recirculation sensor