CDL PRACTICE TEST (GENERAL
KNOWLEDGE) QUESTIONS AND
ANSWERS
d 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? - within seconds
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...? - 12-15 sec
Descending a long downgrade, which of these will help you if you have brake difficulties? - -escape ramp
-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...? - 2
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? - One
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? - 80,000 lbs
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? - -
gravel
-sand
-wood chips
(loose material)
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? - -school buses
KNOWLEDGE) QUESTIONS AND
ANSWERS
d 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? - within seconds
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...? - 12-15 sec
Descending a long downgrade, which of these will help you if you have brake difficulties? - -escape ramp
-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...? - 2
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? - One
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? - 80,000 lbs
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? - -
gravel
-sand
-wood chips
(loose material)
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? - -school buses
