CDL PRACTICE TEST 2025 (GENERAL
KNOWLEDGE)QUESTIONS 100%
SOLVED.
How long should the mud flaps on a truck and trailer be? - ANSWERLong 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? - ANSWERabout a single block
A bridge formula restricts the axle weight for axles which... - ANSWERare closer
together
How soon should oil pressure rise to a normal level after starting the engine? -
ANSWERwithin seconds
If starting from a standstill on a hill, what's the best way to get moving? - ANSWERpartly
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...? - ANSWER12-15 sec
Descending a long downgrade, which of these will help you if you have brake
difficulties? - ANSWER-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? - ANSWERYou 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? - ANSWERall of them
What are two of the most common causes of tire fires? - ANSWERUnder-inflation and
duals that touch
The minimum number of tiedowns on a load is...? - ANSWER2
If your load protrudes more than 4 feet beyond the rear of your vehicle, which of these
do you need in Texas? - ANSWER-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? - ANSWERapply
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? - ANSWERit will avoid driving into oncoming traffic
How can you avoid temporary night blindness from other drivers' lights? - ANSWERlook
at the sidelines instead
If you have to stop on a divided highway, how should you place your warning triangles?
- ANSWERAt 10ft, 100ft and 200ft , all facing approaching traffic
How should you position your trailer to check the alignment of your mirrors? -
ANSWERstraight with your cab
If backing with a tractor trailer, turning the wheel left will do what? - ANSWERturn 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? - ANSWEROne 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? -
ANSWERyou could get hung up on the track
When descending a hill in the state of Texas, what is it unlawful for you to do? -
ANSWERto coast down the hill
If you hit a thick fog bank, what's the best thing to do? - ANSWERstop 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? -
ANSWERelectrical fires and burning liquids
What should you be aware of when passing a motorcycle? - ANSWERthat your vehicle
can throw a motorcycle off course
How many different states' Commercial Driver's Licenses can you hold simultaneously?
- ANSWEROne
If a road has been recently repaved, what can that mean for you going through an
underpass? - ANSWERthe clearance height may be lower than it was previously
KNOWLEDGE)QUESTIONS 100%
SOLVED.
How long should the mud flaps on a truck and trailer be? - ANSWERLong 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? - ANSWERabout a single block
A bridge formula restricts the axle weight for axles which... - ANSWERare closer
together
How soon should oil pressure rise to a normal level after starting the engine? -
ANSWERwithin seconds
If starting from a standstill on a hill, what's the best way to get moving? - ANSWERpartly
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...? - ANSWER12-15 sec
Descending a long downgrade, which of these will help you if you have brake
difficulties? - ANSWER-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? - ANSWERYou 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? - ANSWERall of them
What are two of the most common causes of tire fires? - ANSWERUnder-inflation and
duals that touch
The minimum number of tiedowns on a load is...? - ANSWER2
If your load protrudes more than 4 feet beyond the rear of your vehicle, which of these
do you need in Texas? - ANSWER-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? - ANSWERapply
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? - ANSWERit will avoid driving into oncoming traffic
How can you avoid temporary night blindness from other drivers' lights? - ANSWERlook
at the sidelines instead
If you have to stop on a divided highway, how should you place your warning triangles?
- ANSWERAt 10ft, 100ft and 200ft , all facing approaching traffic
How should you position your trailer to check the alignment of your mirrors? -
ANSWERstraight with your cab
If backing with a tractor trailer, turning the wheel left will do what? - ANSWERturn 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? - ANSWEROne 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? -
ANSWERyou could get hung up on the track
When descending a hill in the state of Texas, what is it unlawful for you to do? -
ANSWERto coast down the hill
If you hit a thick fog bank, what's the best thing to do? - ANSWERstop 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? -
ANSWERelectrical fires and burning liquids
What should you be aware of when passing a motorcycle? - ANSWERthat your vehicle
can throw a motorcycle off course
How many different states' Commercial Driver's Licenses can you hold simultaneously?
- ANSWEROne
If a road has been recently repaved, what can that mean for you going through an
underpass? - ANSWERthe clearance height may be lower than it was previously
