CDL AIR BRAKES 2025 UPDATED
QUESTIONS WITH ALL PASSED
ANSWERS!!
cooling system. May have oil supply or lubricated by engine oil.
Air cooled engine Air compressor
, Water pump Air condenser
Don't know?
2 of 30
Definition
installed in the first tank the air compressor pumps into. Protects
safety valve and tank from the rest of the system from too much
pressure. Valve opens at 150 psi. Something is wrong if the safety
valve releases air.
Give this one a try later!
Check Valve Vapour Relief Valve
Front Brake Limiting Valve Safety Valve
Don't know?
3 of 30
Definition
Put on parking brakes using a diamond-shaped, yellow, push-pull
control knob.
pull the knob out to put the parking brakes, spring brakes on--push
to release
, Older vehicles: parking brakes may be controlled by a lever. Use
parking brakes whenever you park.
Caution: never push brake pedal when spring brakes are on. brakes
could be damaged by the combined force of air pressure and
springs. systems are designed so that it won't happen. Better to not
press brake pedal when spring brakes are on.
Modulating control valve: Control handle is used to apply spring
brakes gradually. spring-loaded, more the lever moves the harder it
becomes. Control spring brakes if the service brakes fail. Move lever
as far as it will go and hold in place with the locking device.
Dual Parking Control Valves: Main air pressure, spring brakes come
on. Buses have a separate air tank which releases spring brakes.
Move vehicle immediately.
push-pull, puts on the spring brakes for parking.
"out", air releases from spring brakes to move. When button is
released, spring brakes come out again. Only enough air in the tank
to do this a few times. If not careful, you could be stopped in a
dangerous situation when air supply runs out.
Give this one a try later!
Modulating Control valves. Spring Brakes
And Parking Brake controls
QUESTIONS WITH ALL PASSED
ANSWERS!!
cooling system. May have oil supply or lubricated by engine oil.
Air cooled engine Air compressor
, Water pump Air condenser
Don't know?
2 of 30
Definition
installed in the first tank the air compressor pumps into. Protects
safety valve and tank from the rest of the system from too much
pressure. Valve opens at 150 psi. Something is wrong if the safety
valve releases air.
Give this one a try later!
Check Valve Vapour Relief Valve
Front Brake Limiting Valve Safety Valve
Don't know?
3 of 30
Definition
Put on parking brakes using a diamond-shaped, yellow, push-pull
control knob.
pull the knob out to put the parking brakes, spring brakes on--push
to release
, Older vehicles: parking brakes may be controlled by a lever. Use
parking brakes whenever you park.
Caution: never push brake pedal when spring brakes are on. brakes
could be damaged by the combined force of air pressure and
springs. systems are designed so that it won't happen. Better to not
press brake pedal when spring brakes are on.
Modulating control valve: Control handle is used to apply spring
brakes gradually. spring-loaded, more the lever moves the harder it
becomes. Control spring brakes if the service brakes fail. Move lever
as far as it will go and hold in place with the locking device.
Dual Parking Control Valves: Main air pressure, spring brakes come
on. Buses have a separate air tank which releases spring brakes.
Move vehicle immediately.
push-pull, puts on the spring brakes for parking.
"out", air releases from spring brakes to move. When button is
released, spring brakes come out again. Only enough air in the tank
to do this a few times. If not careful, you could be stopped in a
dangerous situation when air supply runs out.
Give this one a try later!
Modulating Control valves. Spring Brakes
And Parking Brake controls
