Engine Brakes Quiz

What is the purpose of engine brakes?

• To slow down vehicles quickly

• To prevent brake overheating

• To extend brake life

• All of the above

How do Compression Release Brakes work?

• By increasing back-pressure in the exhaust

• By opening the exhaust valves

• By shutting off the fuel injection

• By releasing compressed air

What happens when the Compression Release Brake is applied?

• The compressed air is released

• The engine pulls the piston down

• The engine creates a vacuum

• All of the above

How do truck drivers control the amount of engine braking?

• By activating the exhaust brake

• By adjusting the compression brake

• By flipping a switch in the cab

• By releasing the accelerator

Why are Compression Brakes banned or restricted in some locations?

• Because they disturb the peace

• All of the above

• Because they create loud noise

• Because they wake people at night

How do Exhaust Brakes work?

• By holding compression in the engine

• By increasing back-pressure in the exhaust

• By reducing vehicle speed

• By releasing compressed air through an exhaust valve

Where is an exhaust brake typically mounted?

• On the inlet side of the turbocharger

• On the outlet side of the turbocharger

• On the intake throttle

• On the exhaust valve

What is the advantage of Exhaust Brakes over Compression Brakes?

• They are favored by refuse collection trucks

• They do not produce loud noise

• All of the above

• They are more effective

How do modern Diesel engines control exhaust brake back-pressure?

• By opening the exhaust valve

• By reducing the engine's ability to push out compression

• By closing the turbocharger's vanes

• By increasing the compression

What is the purpose of the Jake Brake Adjustment?

• To reduce brake fade

• To control the exhaust brake back-pressure

• To extend friction brake life

• To adjust the compression brake force