CPC Vehicle Systems

Question 1

What is the function of the turbocharger in a modern HGV diesel engine?

Accepted Answer

To force more air into the engine cylinders, increasing power output and efficiency

Answer

To reduce exhaust noise

Answer

To cool the engine

Answer

To filter fuel before injection

Question 2

What is the purpose of the EGR (Exhaust Gas Recirculation) system?

Accepted Answer

To reduce nitrogen oxide (NOx) emissions by recirculating a portion of exhaust gas back into the engine

Answer

To increase engine power

Answer

To improve fuel economy by reusing fuel

Answer

To reduce exhaust noise levels

Question 3

What type of braking system do most modern HGVs use?

Accepted Answer

Air-operated (pneumatic) disc or drum brakes

Answer

Cable-operated brakes

Answer

Hydraulic brakes only

Answer

Electric brakes only

Question 4

What is the function of the air compressor in an HGV?

Accepted Answer

To generate compressed air for the braking system, suspension, and other pneumatic systems

Answer

To inflate tyres while driving

Answer

To power the air conditioning only

Answer

To clean the engine air filter

Question 5

What does the ABS (Anti-lock Braking System) do on an HGV?

Accepted Answer

It prevents the wheels from locking during heavy braking, allowing the driver to maintain steering control

Answer

It stops the vehicle faster in all conditions

Answer

It automatically applies the brakes when an obstacle is detected

Answer

It reduces brake wear during normal driving

Question 6

What is the purpose of the differential in an HGV drivetrain?

Accepted Answer

To allow the driven wheels to rotate at different speeds when cornering

Answer

To change the engine's fuel supply

Answer

To provide additional braking force

Answer

To connect the trailer to the tractor unit