Louisiana Class D "Chauffeur's" License
Test QUESTIONS & CORRECT ANSWERS,
VERIFIED & ALREADY GRADED A+
the ___ of the air brake system protects the tanks and the rest of the system from too much pressure. it
is usually set at 150 psi. if it releases air, something is wrong
safety valve
the ___ part of the air brake system tells you how much pressure is left in the air tanks
supply pressure gauges
the ____ shows you how much air pressure you are applying to the breaks
application pressure gauge
if the air pressure in the tanks falls below ___, the low air pressure warning will come on.
60psi
___ brakes are held back by air pressure and are the mechanical force which keeps the emergency and
parking brakes in place
spring brakes
in newer vehicles, you engage the parking breaks by using this knob
diamond-shaped, yellow, push-pull knob
, never push the break pedal down when the ___ brakes are on
spring breaks
the first step to checking the air brakes is to see if the air pressure drops more than ____ pounds in ___
minute
3 pounds in 1 minute
the second step to checking the air brakes is to ____
make sure the low air pressure warning signals are working
the third step of checking the air brakes is to make sure the parking brake valve closes at ____psi
20-40 psi
7 additional things that must be checked when doing an air brake check
1)air compressor drive belt
2) manual slack adjusters on S-cam brakes
3) brake drums, linings, and hoses
4) rate of air pressure buildup
5) air compressor governor cut-in and cut-out pressures
6) parking brake
7) service brakes
Test QUESTIONS & CORRECT ANSWERS,
VERIFIED & ALREADY GRADED A+
the ___ of the air brake system protects the tanks and the rest of the system from too much pressure. it
is usually set at 150 psi. if it releases air, something is wrong
safety valve
the ___ part of the air brake system tells you how much pressure is left in the air tanks
supply pressure gauges
the ____ shows you how much air pressure you are applying to the breaks
application pressure gauge
if the air pressure in the tanks falls below ___, the low air pressure warning will come on.
60psi
___ brakes are held back by air pressure and are the mechanical force which keeps the emergency and
parking brakes in place
spring brakes
in newer vehicles, you engage the parking breaks by using this knob
diamond-shaped, yellow, push-pull knob
, never push the break pedal down when the ___ brakes are on
spring breaks
the first step to checking the air brakes is to see if the air pressure drops more than ____ pounds in ___
minute
3 pounds in 1 minute
the second step to checking the air brakes is to ____
make sure the low air pressure warning signals are working
the third step of checking the air brakes is to make sure the parking brake valve closes at ____psi
20-40 psi
7 additional things that must be checked when doing an air brake check
1)air compressor drive belt
2) manual slack adjusters on S-cam brakes
3) brake drums, linings, and hoses
4) rate of air pressure buildup
5) air compressor governor cut-in and cut-out pressures
6) parking brake
7) service brakes
