CDL Practice Test (General Knowledge)
Terms in this set (98)
How long should the mud flaps on a truck and trailer be?
Long enough to reach within 8 in of the roadway
If you're driving in town, how far will your recommended 12-15 second planning ahead measure in distance?
about a single block
A bridge formula restricts the axle weight for axles which...
are closer together
How soon should oil pressure rise to a normal level after starting the engine?
If starting from a standstill on a hill, what's the best way to get moving?
partly engage the clutch before you take your right foot off the brake
Driving on a highway, it is recommended that you monitor a quarter of a mile ahead. At highway speeds, this equates to...?
Descending a long downgrade, which of these will help you if you have brake difficulties?
-a turn going uphill
-an open field
(all of the above)
If you are tested and found to have a blood alcohol concentration below 0.04% but above 0.0, what will happen?
You will be taken out of service for 24 hrs
Federal, State, and local regulations concerning cargo weight, securement, and cover vary widely. Which should you obey?
all of them
What are two of the most common causes of tire fires?
Under-inflation and duals that touch
The minimum number of tiedowns on a load is...?
If your load protrudes more than 4 feet beyond the rear of your vehicle, which of these do you need in Texas?
-a red flag at least 12X12 in (day)
-a special permit
-a burning red visible light (night)
(all of the above)
If an accident victim is bleeding heavily, what should you do to help?
apply direct pressure to the wound
If there is an obstacle in the road and you have a choice of directions around it, why should you choose to go right?
it will avoid driving into oncoming traffic
How can you avoid temporary night blindness from other drivers' lights?
look at the sidelines instead
If you have to stop on a divided highway, how should you place your warning triangles?
At 10ft, 100ft and 200ft , all facing approaching traffic
How should you position your trailer to check the alignment of your mirrors?
straight with your cab
If backing with a tractor trailer, turning the wheel left will do what?
turn the cab left and the trailer right
If you have to stop on an undivided road, how should you set out your emergency warning triangles?
One front and one rear, and one nearer the vehicle toward traffic in the same lane
If a railroad crossing has a steep approach/exit, what should you be very aware of?
you could get hung up on the track
When descending a hill in the state of Texas, what is it unlawful for you to do?
to coast down the hill
If you hit a thick fog bank, what's the best thing to do?
stop in a safe space and wait for it to pass
If you have a B:C type fire extinguisher, what is it suitable for dealing with?
electrical fires and burning liquids
What should you be aware of when passing a motorcycle?
that your vehicle can throw a motorcycle off course
How many different states' Commercial Driver's Licenses can you hold simultaneously?
If a road has been recently repaved, what can that mean for you going through an underpass?
the clearance height may be lower than it was previously
What is the greatest weight allowed for any vehicle or combination of vehicles, plus load, in the state of Texas?
If you have a convex mirror (e.g., "fisheye," "spot," "bugeye"), what should you allow for?
the objects may appear smaller and further away than they really are
Which of the following are you not allowed to transport on public highways in Texas in an open truck?
If lug nuts have streaks of rust on them, what might that indicate?
they might be loose
Which of these commercial vehicles must come to a complete stop at a railroad crossing?
-trucks carrying explosives
How should you check for overhanging hazards (trees, power lines, etc.) before backing up?
get out of the vehicle and walk round to check for yourself
How many red warning triangle/flares/reflectors should your vehicle be carrying?
If you need to establish a warning system at a time when artificial light is not required, what should you use in place of your warning triangles/ flares/reflectors, according to Texas law?
2 red flags
If you can see the rear or front end of the vehicle but can't see the driver, you must assume...?
s/he can't see you
To gain a CDL in Texas, you must self-certify that...?
- you are not addicted to alcohol
-not an insulin-dependent diabetic
-not addicted to drugs
(all of the above)
How do you know when it's time to shift gear?
by monitoring the vehicle speed and engine speed
If you double your speed, how much does your stopping distance increase?
For which of these circumstances should you NOT use your horn?
to show somebody they've annoyed you
If you are towing another vehicle, what is the maximum length of tow connection you are permitted?
If you're carrying hazardous materials, what should you do with the shipping paper when you're out of the cab, for example, eating in a diner?
leave it in plain view on the drivers seat
You are following another vehicle. What is the minimum space you should maintained between the two vehicles?
enough space for a following vehicle to overtake and enter the space btwn you safely
If you travel at 55 mph instead of 65 mph, you could improve your fuel economy by as much as...?
a mile per gallon
Going down a mountain, upon reaching your "safe" speed, you should then brake to...?
When performing a walk-around inspection, what must you do to the steering system?
grab the steering mechanism to test it
If you are stopped by the police and refuse to submit to a breath test or other testing method for drugs or alcohol, what will happen?
you will be treated as if you failed the test and lose your license
If you have a cargo fire inside a box trailer, it's important that you...?
dont open the doors
After your first stop, how often must you stop to check your cargo is secure?
every 3 hrs/150 miles
If you must leave the road to avoid a collision, you should...?
-stay on the shoulder until fully stopped
-keep one set of wheels on the pavement
(all of the above)
Which of these is a key steering system part?
If you're the first person on scene at an accident, what should you do?
stop at a safe distance and warn other traffic
What is the purpose of a header board?
protects you from your cargo in case of crash/emergency stop
Which of the following must always stop at railroad grade crossings?
trucks carrying explosives
buses with passengers
Can you take medications while driving?
only if the doctor says it won't affect safe driving
What should you do if you enter a drive-wheel braking skid?
stop braking and counter steer
Which of the following reduces your clearance?
Which vehicles are exempt for length, width, and weight regulations
fire department vehicles
If your vehicle is not equipped with electrical fuses, what should you do?
mention it to the examiner
On engine start, what should you check for?
make sure the oil pressure gauge is working
On your second out-of-service violation in 10 years, you will lose your CDL for
at least one year
Which of these is a suspension system defect?
leaking shock absorbers
What is the best way to recover from a brake failure while going downhill?
Which of the following contains more alcohol?
"they're all the same"
How would you describe black ice?
not easy to spot
Which of the following would cause you to stop IMMEDIATELY?
low,dropping, or fluctuating oil pressure
Why shouldn't you swing too far to the left before a right turn?
a driver may want to pass you on the right
What things should you check during a trip?
-watch gauges for signs of trouble
-check critical items when you stop
What are the causes of tire fires?
Duals that touch
What effect does a light load have on stopping distance?
longer (braking system designed to best work on full load)
What is the most important reason for doing a vehicle inspection?
your safety and others
What may happen if your rear wheels lock?
skid, jackknife , spin
How fast must you be going for your speeding to be a serious traffic violation?
15mph over limit
what is road rage?
trying to hurt others with a vehicle
If you hear a loud pop and your steering feels "heavy," what should you do?
grip the wheel and stay off the brake
When is stopping the safest thing to do in an emergency?
when there is no other option
What should you check on a sealed container?
dont exceed gross weight and axel weight limits
If you have more than one license
you may be fined 5000 or go to jail
What is unsafe coasting?
keeping your vehicle out of gear for more than the length of the vehicle
If you use a CMV to commit a felony involving controlled substances, your CDL will
be revoked for life on your first offense
You will lose your CDL for at least one year on the first offense for which of the following?
-refusing to undergo a blood alcohol test
-leaving the scene of an accident involving a CMV
-driving a CMV with a BAC of 0.04% or higher
What should you do if you feel drowsy before you drive?
What is the most important sign you and the helper should agree on when backing?
What is the greatest weight allowed for any vehicle or combination of vehicles in Texas (except oversized loads)?
If you let someone without a CDL drive your CMV, what punishment could they or you face?
If your license to operate your personal vehicle is revoked for reasons other than alcohol, controlled substances, or a felony, you will
lose your CDL for the same duration
How many days do you have to notify your employer of a parking violation
you dont have to, any other violation = 30 days
Which of the following may be part of the skills test?
straight line backing, offest back/right or left, parallel park on either side, and alley dock.
What force do you have to particularly consider when driving in the mountains?
What three kinds of emergency equipment must you have?
Fuses, signalling devices, and an extinguisher will let you deal with most immediate problems and keep you safe from other drivers.
What should you do if you have to leave the road?
keep one set of wheels on the pavement
What color should your clearance lights and reflectors be?
Your clearance lights and red reflectors should be
red on rear and amber elsewhere
How close to the highway must mud flaps reach for trucks and trailers with more than four tires on the rear axle?
What two things do all CDL vehicle inspection tests include?
All of the tests include an
engine start and an in-cab inspection
. Then, you test may require an inspection of the entire vehicle or only a portion.
What are the two basic reasons to cover cargo?
The two basic reasons to cover cargo are to
protect people from spilled cargo and to protect the cargo from the weather
. Check your mirrors for flapping covers during the trip.
How much does your risk of an accident increase if you have 6 hours of sleep or less?
When should you downshift?
before starting down a hill or entering a curve
While driving, you may
You are not allowed to text, hold the phone to your ear, or
dial by pressing more than one button while driving
When should you inspect your cargo?
-before the trip
-after the first 50 miles
-every 3 hours/150 miles
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