Louisiana Class D "Chauffeur's" License
Test- Questions and Answers
the three braking systems that make up an air brake system are Correct Ans-service brake,
parking brake, and emergency brake
the part of the air brake system which pumps air into the air storage tanks Correct Ans-air
compressor
the part of the air brake system which controls when the air compressor will pump air into the
air storage tanks Correct Ans-air compressor governor
the part of the air brake system which is operated by turning a quarter turn or by pulling a cable
and which must be drained manually at the end of the day Correct Ans-manual air tank drain
the part of the air brake system in which water and oil are automatically expelled Correct
Ans-automatice air tank drain
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 Correct Ans-safety
valve
the ___ part of the air brake system tells you how much pressure is left in the air tanks
Correct Ans-supply pressure gauges
, the ____ shows you how much air pressure you are applying to the breaks Correct Ans-
application pressure gauge
if the air pressure in the tanks falls below ___, the low air pressure warning will come on.
Correct Ans-60psi
___ brakes are held back by air pressure and are the mechanical force which keeps the
emergency and parking brakes in place Correct Ans-spring brakes
in newer vehicles, you engage the parking breaks by using this knob Correct Ans-diamond-
shaped, yellow, push-pull knob
never push the break pedal down when the ___ brakes are on Correct Ans-spring breaks
the first step to checking the air brakes is to see if the air pressure drops more than ____
pounds in ___ minute Correct Ans-3 pounds in 1 minute
the second step to checking the air brakes is to ____ Correct Ans-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 Correct Ans-20-40 psi
Test- Questions and Answers
the three braking systems that make up an air brake system are Correct Ans-service brake,
parking brake, and emergency brake
the part of the air brake system which pumps air into the air storage tanks Correct Ans-air
compressor
the part of the air brake system which controls when the air compressor will pump air into the
air storage tanks Correct Ans-air compressor governor
the part of the air brake system which is operated by turning a quarter turn or by pulling a cable
and which must be drained manually at the end of the day Correct Ans-manual air tank drain
the part of the air brake system in which water and oil are automatically expelled Correct
Ans-automatice air tank drain
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 Correct Ans-safety
valve
the ___ part of the air brake system tells you how much pressure is left in the air tanks
Correct Ans-supply pressure gauges
, the ____ shows you how much air pressure you are applying to the breaks Correct Ans-
application pressure gauge
if the air pressure in the tanks falls below ___, the low air pressure warning will come on.
Correct Ans-60psi
___ brakes are held back by air pressure and are the mechanical force which keeps the
emergency and parking brakes in place Correct Ans-spring brakes
in newer vehicles, you engage the parking breaks by using this knob Correct Ans-diamond-
shaped, yellow, push-pull knob
never push the break pedal down when the ___ brakes are on Correct Ans-spring breaks
the first step to checking the air brakes is to see if the air pressure drops more than ____
pounds in ___ minute Correct Ans-3 pounds in 1 minute
the second step to checking the air brakes is to ____ Correct Ans-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 Correct Ans-20-40 psi
