Test NEWEST 2024 WITH COMPLETE
QUESTIONS AND CORRECT VERIFIED
ANSWERS (DETAILED ANSWERS)
ALREADY GRADED A+ 100%
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Class D license is for anyone driving a vehicle or combined set of vehicles in this weight
range _____, as long as they are not carrying hazardous materials -
✔✔ANSW✔✔..10,001-26,001 pounds
A Class D license allows for a driver-for-fire to drive any vehicle fitting into the Class __
requirements - ✔✔ANSW✔✔..E
you must be ____ years old to receive a class D license - ✔✔ANSW✔✔..17
the maximum width for all vehicles except buses is ___ - ✔✔ANSW✔✔..8 feet
the maximum width for buses is ____ - ✔✔ANSW✔✔..8ft 6in
the load may not project more than ___ beyond the width of the body -
✔✔ANSW✔✔..6in
the three braking systems that make up an air brake system are -
✔✔ANSW✔✔..service brake, parking brake, and emergency brake
the part of the air brake system which pumps air into the air storage tanks -
✔✔ANSW✔✔..air compressor
the part of the air brake system which controls when the air compressor will pump air
into the air storage tanks - ✔✔ANSW✔✔..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 -
✔✔ANSW✔✔..manual air tank drain
, the part of the air brake system in which water and oil are automatically expelled -
✔✔ANSW✔✔..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 -
✔✔ANSW✔✔..safety valve
the ___ part of the air brake system tells you how much pressure is left in the air tanks -
✔✔ANSW✔✔..supply pressure gauges
the ____ shows you how much air pressure you are applying to the breaks -
✔✔ANSW✔✔..application pressure gauge
if the air pressure in the tanks falls below ___, the low air pressure warning will come
on. - ✔✔ANSW✔✔..60psi
___ brakes are held back by air pressure and are the mechanical force which keeps the
emergency and parking brakes in place - ✔✔ANSW✔✔..spring brakes
in newer vehicles, you engage the parking breaks by using this knob -
✔✔ANSW✔✔..diamond-shaped, yellow, push-pull knob
never push the break pedal down when the ___ brakes are on - ✔✔ANSW✔✔..spring
breaks
the first step to checking the air brakes is to see if the air pressure drops more than
____ pounds in ___ minute - ✔✔ANSW✔✔..3 pounds in 1 minute
the second step to checking the air brakes is to ____ - ✔✔ANSW✔✔..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 - ✔✔ANSW✔✔..20-40 psi
7 additional things that must be checked when doing an air brake check -
✔✔ANSW✔✔..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