MS CLASS D LICENSE TEST 2026 FINAL PAPER
SOLVED ITEMS ACCURATE MARKING
◉ if the air pressure in the tanks falls below ___, the low air pressure
warning will come on. Answer: 60psi
◉ ___ brakes are held back by air pressure and are the mechanical
force which keeps the emergency and parking brakes in place
Answer: spring brakes
◉ in newer vehicles, you engage the parking breaks by using this
knob Answer: diamond-shaped, yellow, push-pull knob
◉ never push the break pedal down when the ___ brakes are on
Answer: spring breaks
◉ the first step to checking the air brakes is to see if the air pressure
drops more than ____ pounds in ___ minute Answer: 3 pounds in 1
minute
◉ the second step to checking the air brakes is to ____ Answer: 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 Answer: 20-40 psi
◉ 7 additional things that must be checked when doing an air brake
check Answer: 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
◉ 2 methods of emergency breaking Answer: controlled or stab
◉ the type of emergency breaking in which you put on the brakes as
hard as you can without locking the wheels or turning the steering
wheel Answer: controlled braking
◉ the type of emergency braking in which you press the break pedal
as hard as you can, let up when the wheels lock, and push on the
brakes again when the vehicle starts rolling Answer: stab breaking
◉ with air brakes it takes ____ for the air to flow through the lines to
the brakes Answer: 1/2 second or more
,◉ the equation which equals the total stopping distance for vehicles
with air brakes Answer: perception distance + reaction distance +
brake lag distance + effective braking distance
◉ if the low air pressure warning for the air brake system comes on
you should __ Answer: stop and safely park as soon as possible
◉ brakes can fail or fade from ___ caused by ___ Answer: excessive
heat caused by using them too much or improper adjustment
◉ any time you park you should use the parking brake except for
these 2 exceptions Answer: the brakes are very hot or in the brakes
are wet and the temperature is freezing
◉ Maximum width for vehicles (Excluding Buses) Answer: 8 feet
◉ a) Press the brake pedal as hard as you can. b) Release the brakes
when the wheels lock up. c) As soon as the wheels start rolling, put
on the brakes fully again Answer: Stab braking
◉ A load will not project more than ____ beyond the width of the
body Answer: 6 inches
, ◉ Time it takes for the air to flow through the lines to the brakes
Answer: One half second or more
◉ Maximum width for buses Answer: 8 feet 6 inches
◉ If the low air pressure warning comes on, ____ Answer: Stop and
safely park your vehicle as soon as possible
◉ Maximum height for all vehicles Answer: 13 feet 6 inches
◉ Brakes can fade or fail from excessive heat caused by ____ and not
relying on the ____ effect or ____ Answer: Using them too much,
engine braking, improper adjustment
◉ Maximum length for any single vehicle (Including Load) Answer:
40 feet
◉ Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures Answer: Very hot,
very wet
◉ Maximum length for truck-tractor and trailer combination
Answer: 65 feet
SOLVED ITEMS ACCURATE MARKING
◉ if the air pressure in the tanks falls below ___, the low air pressure
warning will come on. Answer: 60psi
◉ ___ brakes are held back by air pressure and are the mechanical
force which keeps the emergency and parking brakes in place
Answer: spring brakes
◉ in newer vehicles, you engage the parking breaks by using this
knob Answer: diamond-shaped, yellow, push-pull knob
◉ never push the break pedal down when the ___ brakes are on
Answer: spring breaks
◉ the first step to checking the air brakes is to see if the air pressure
drops more than ____ pounds in ___ minute Answer: 3 pounds in 1
minute
◉ the second step to checking the air brakes is to ____ Answer: 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 Answer: 20-40 psi
◉ 7 additional things that must be checked when doing an air brake
check Answer: 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
◉ 2 methods of emergency breaking Answer: controlled or stab
◉ the type of emergency breaking in which you put on the brakes as
hard as you can without locking the wheels or turning the steering
wheel Answer: controlled braking
◉ the type of emergency braking in which you press the break pedal
as hard as you can, let up when the wheels lock, and push on the
brakes again when the vehicle starts rolling Answer: stab breaking
◉ with air brakes it takes ____ for the air to flow through the lines to
the brakes Answer: 1/2 second or more
,◉ the equation which equals the total stopping distance for vehicles
with air brakes Answer: perception distance + reaction distance +
brake lag distance + effective braking distance
◉ if the low air pressure warning for the air brake system comes on
you should __ Answer: stop and safely park as soon as possible
◉ brakes can fail or fade from ___ caused by ___ Answer: excessive
heat caused by using them too much or improper adjustment
◉ any time you park you should use the parking brake except for
these 2 exceptions Answer: the brakes are very hot or in the brakes
are wet and the temperature is freezing
◉ Maximum width for vehicles (Excluding Buses) Answer: 8 feet
◉ a) Press the brake pedal as hard as you can. b) Release the brakes
when the wheels lock up. c) As soon as the wheels start rolling, put
on the brakes fully again Answer: Stab braking
◉ A load will not project more than ____ beyond the width of the
body Answer: 6 inches
, ◉ Time it takes for the air to flow through the lines to the brakes
Answer: One half second or more
◉ Maximum width for buses Answer: 8 feet 6 inches
◉ If the low air pressure warning comes on, ____ Answer: Stop and
safely park your vehicle as soon as possible
◉ Maximum height for all vehicles Answer: 13 feet 6 inches
◉ Brakes can fade or fail from excessive heat caused by ____ and not
relying on the ____ effect or ____ Answer: Using them too much,
engine braking, improper adjustment
◉ Maximum length for any single vehicle (Including Load) Answer:
40 feet
◉ Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures Answer: Very hot,
very wet
◉ Maximum length for truck-tractor and trailer combination
Answer: 65 feet
