Engine Brakes Quiz

What is the purpose of engine brakes?

• To increase the speed of diesel-powered vehicles

• To generate loud exhaust noise

• To reduce the lifespan of brakes

• To prevent brake fade and failure on downhill grades

How do Compression Release Brakes work?

• By holding the compression in the engine and slowing the crankshaft's rotation

• By shutting off the Fuel Injection during Engine Brake operation

• By opening the exhaust valves at the top of the compression stroke

• By increasing the back-pressure of the exhaust

What happens when the Compression Release Brake is applied?

• The engine pulls the piston down, creating a vacuum

• The engine releases compressed air, creating audible sound waves

• The engine increases the back-pressure of the exhaust

• The engine slows down the crankshaft's rotation

How do truck drivers control the amount of engine braking?

• By adjusting the compression brake back-pressure

• By activating the exhaust brake

• By releasing the accelerator

• By flipping a switch in the cab

What is the purpose of an Exhaust Brake?

• To increase the speed of the engine

• To reduce the noise produced by the engine

• To release compressed air through an exhaust valve

• To hold the compression in the engine and slow the crankshaft's rotation

Where is an Exhaust Brake typically mounted?

• On the cylinder head

• On the exhaust manifold

• On the intake side of the turbocharger

• On the outlet side of the turbocharger

What is the function of the butterfly valve in an exhaust brake?

• To absorb the energy of the compression stroke

• To control the vanes of the turbocharger

• To release compressed air and create audible sound waves

• To restrict exhaust flow and increase back-pressure

What is the advantage of using a Variable Vane Turbocharger in modern Diesel engines?

• It increases the speed of the engine

• It improves the efficiency of the compression stroke

• It reduces the noise produced by the engine

• It allows for better control of exhaust brake back-pressure

Why are Exhaust Brakes becoming more popular?

• Because they extend the lifespan of friction brakes

• Because they are more effective than Compression Brakes

• Because they produce loud exhaust noise

• Because they can be used in residential areas without disturbing the peace

What is the purpose of Jake Brake Adjustment?

• To reduce the noise produced by the engine

• To increase the braking force of the engine

• To adjust the compression brake back-pressure

• To control the vanes of the turbocharger