Page 1 of 46
Texas CDL general knowledge exam 2025 Version A,
CDL test study guide PDF, Texas commercial driver
license questions, CDL practice test 2025, Texas DPS
CDL prep, verified CDL answers Texas, CDL exam
questions and answers
Which of these statements about marking a stopped vehicle is
true? - ANSWER-If a hill or curve keeps drivers behind you
from seeing the vehicle within 500 feet, the rear reflective
triangle should be moved back down the road to give adequate
warning.
You are driving a 40 foot vehicle at 45 MPH. Driving conditions
are ideal (dry pavement, good visibility). What is the least
amount of space that you should keep in front of your vehicle to
be safe? - ANSWER-5 seconds
The amount of liquid to load into a tank depends on: -
ANSWER-a. The weight of the liquid.
b. The legal weight limits.
,Page 2 of 46
c. The amount of liquid will expand in transit.
Modern air brake systems combines three different systems. The
are the service brakes, the parking brakes and the: - ANSWER-
emergency brakes
You are starting your vehicle in motion from a stop. As you
apply power to the drive wheels, they start to spin. You should: -
ANSWER-take your foot off the accelerator
You should use your mirrors to check: - ANSWER-(all) traffic
gaps before you merge; the condition of the tires and cargo;
where the rear of your vehicle is while you make turns.
The proper way to hold a steering wheel is at clock positions
____ and ____. - ANSWER-3 and 9
Cargo inspections: - ANSWER-Should be performed after every
break you take while driving.
A semitrailer or trailer may not exceed a length of ____ feet
each when operated in a truck tractor, semitrailer, and trailer
combination. - ANSWER-28.5
,Page 3 of 46
If you're towing a house trailer at night outside the city limits or
on a divided highway, your vehicle must be equipped with -
ANSWER-three flares or three red emergency reflectors
What is the color of rear clearance lamps on any truck, bus or
trailer 80 inches or more in width? - ANSWER-red
All motor vehicles, trailers, semitrailers, or pole trailers
manufactured after year ______ must be equipped with
electrical turn signal lights. - ANSWER-1959
What type of lighting does every farm tractor and every self-
propelled unit of farm equipment need to have? - ANSWER-two
head lamps, one tail light, two red reflectors, hazards warning
lights and other bitch lights on the back
Reflectors on CMVs that are 80 or more inches wide must be
mounted at least ____ inches but no more than ____ inches
above the ground. - ANSWER-24-60
, Page 4 of 46
Oil and water usually collect in compressed air tanks. If you do
not have an automatic tank drain, when should you drain the air
tanks? - ANSWER-after each working day
Why drain water from the compressed air tanks? - ANSWER-
water can freeze in cold weather and cause brake failure
Air brake equipped vehicles must have: - ANSWER-a supply
pressure gauge
What can legally hold a parking or emergency brake in position
for a truck, truck tractor or bus? - ANSWER-spring pressure
Air loss in a straight truck or bus should not be more than ____
with the engine off and the brakes on. - ANSWER-3 psi in a
minute
To make an emergency stop with air brakes, using the stab
braking method, you should: - ANSWER-Brake as hard as you
can, get off the brakes when the wheels lock, get back on the
brakes when the wheels start rolling again.
Texas CDL general knowledge exam 2025 Version A,
CDL test study guide PDF, Texas commercial driver
license questions, CDL practice test 2025, Texas DPS
CDL prep, verified CDL answers Texas, CDL exam
questions and answers
Which of these statements about marking a stopped vehicle is
true? - ANSWER-If a hill or curve keeps drivers behind you
from seeing the vehicle within 500 feet, the rear reflective
triangle should be moved back down the road to give adequate
warning.
You are driving a 40 foot vehicle at 45 MPH. Driving conditions
are ideal (dry pavement, good visibility). What is the least
amount of space that you should keep in front of your vehicle to
be safe? - ANSWER-5 seconds
The amount of liquid to load into a tank depends on: -
ANSWER-a. The weight of the liquid.
b. The legal weight limits.
,Page 2 of 46
c. The amount of liquid will expand in transit.
Modern air brake systems combines three different systems. The
are the service brakes, the parking brakes and the: - ANSWER-
emergency brakes
You are starting your vehicle in motion from a stop. As you
apply power to the drive wheels, they start to spin. You should: -
ANSWER-take your foot off the accelerator
You should use your mirrors to check: - ANSWER-(all) traffic
gaps before you merge; the condition of the tires and cargo;
where the rear of your vehicle is while you make turns.
The proper way to hold a steering wheel is at clock positions
____ and ____. - ANSWER-3 and 9
Cargo inspections: - ANSWER-Should be performed after every
break you take while driving.
A semitrailer or trailer may not exceed a length of ____ feet
each when operated in a truck tractor, semitrailer, and trailer
combination. - ANSWER-28.5
,Page 3 of 46
If you're towing a house trailer at night outside the city limits or
on a divided highway, your vehicle must be equipped with -
ANSWER-three flares or three red emergency reflectors
What is the color of rear clearance lamps on any truck, bus or
trailer 80 inches or more in width? - ANSWER-red
All motor vehicles, trailers, semitrailers, or pole trailers
manufactured after year ______ must be equipped with
electrical turn signal lights. - ANSWER-1959
What type of lighting does every farm tractor and every self-
propelled unit of farm equipment need to have? - ANSWER-two
head lamps, one tail light, two red reflectors, hazards warning
lights and other bitch lights on the back
Reflectors on CMVs that are 80 or more inches wide must be
mounted at least ____ inches but no more than ____ inches
above the ground. - ANSWER-24-60
, Page 4 of 46
Oil and water usually collect in compressed air tanks. If you do
not have an automatic tank drain, when should you drain the air
tanks? - ANSWER-after each working day
Why drain water from the compressed air tanks? - ANSWER-
water can freeze in cold weather and cause brake failure
Air brake equipped vehicles must have: - ANSWER-a supply
pressure gauge
What can legally hold a parking or emergency brake in position
for a truck, truck tractor or bus? - ANSWER-spring pressure
Air loss in a straight truck or bus should not be more than ____
with the engine off and the brakes on. - ANSWER-3 psi in a
minute
To make an emergency stop with air brakes, using the stab
braking method, you should: - ANSWER-Brake as hard as you
can, get off the brakes when the wheels lock, get back on the
brakes when the wheels start rolling again.
