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- California CDL Combination Vehicles Test Answers – 210+ Q&A Revealed
- California CDL Combination Vehicles Test Answers – Model 1
- California CDL Combination Vehicles Test Answers – Model 2
- California CDL Combination Vehicles Test Answers – Model 3
- California CDL Combination Vehicles Test Answers – Model 4
- California CDL Combination Vehicles Test Answers – Model 5
- California CDL Combination Vehicles Test Answers – Model 6
- About California CDL Combination Vehicle Test
California CDL Combination Vehicles Test Answers – 210+ Q&A Revealed
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California CDL Combination Vehicles Test Answers – Model 1
Q. There are two things that will prevent a rollover. They are (1) keep the cargo is close to the ground as possible, and
Ans: Go slow around turns
Q. Compared to a straight truck or bus, there are things to inspect on a combination vehicle
Ans: More
Q. Before you back under a truck trailer, make sure the
Ans: The trailer brakes are locked
Q. You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is
Ans: At normal pressure
Q. The front trailer supports are up and the trailer is resting on the tractor. Make sure
Ans: There’s enough clearance between the tractor frame and the landing gear
Q. Which statement is true
Ans: Bobtail tractors can take longer to stop than a combination vehicle loaded to maximum gross weight
Q. When checking the trailer’s emergency brakes, the tractor protection control valve should be placed in the___position.
Ans: Emergency
Q. To stop a trailer skid you should
Ans: Release the brakes
Q. Tractor with the___trailer requires the shortest stopping distance
Ans: Fully loaded
Q. A trailer is most likely to jackknife when it is
Ans: Empty
Q. To unlock the fifth wheel, pull the release handle to the___ position
Ans: Open
Q. You are coupling a tractor to a semi-trailer. You have backed up but you were not under it. Which should you hook before backing under the semi-trailer
Ans: The emergency and service lines
Q. Glad hands are used to connect the
Ans: Service and emergency air lines from the truck to the trailer
Q. The best way to tell if your trailer I started to skid is to
Ans: See it in your mirrors
Q. How much space should be between the upper and lower fifth wheel after coupling
Ans: None
Q. If you have a coupling with a semi-trailer, where should the front trailer support be before driving away
Ans: Fully raised with the crank handle secured and it’s a bracket
Q. When you get ready to back off a semi-trailer, you should lineup
Ans: Directly in front of the trailer
Q. Under good driving conditions, you should leave at least one second of space between your vehicle and the vehicle ahead of you for every___Feet of your vehicle length
Ans: 10
Q. Which of these vehicles off track the most
Ans: Five-axle trailer towing a 52-foot trailer
Q. After you have coupled the trailer, you should begin rising the landing gear by using the___gear
Ans: Low
Q. The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that
Ans: The coupling is not right and should be fixed before driving the coupled unit
Q. You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is
Ans: At normal pressure
Q. To stop a trailer skid you should
Ans: Release the brakes
Q. A tractor with a___trailer requires the shortest stopping distance
Ans: Fully loaded
Q. You should not back a tractor under a trailer until the whole air system is
Ans: At normal pressure
Q. The best way to tell if your trailer has started to skid is to
Ans: See it in your mirrors
Q. Under good conditions, you should leave at least one second of space between your vehicle and the vehicle ahead of you for every___Feet your vehicles length
Ans: 10
Q. A trailer is most likely to jackknife when
Ans: Empty
Q. You are coupling a semi-trailer to your truck. But have not backed up under it. The trailer is at the right height when
Ans: It will be raised slightly on the tractor is backed up under it
Q. If you cannot make a turn without entering another traffic lane, you should
Ans: Turn wide as you complete your turn
Q. For a coupling to be completed, the safety catch for a fifth-wheel locking lever must be
Ans: Over the locking lever
Q. Why should you lock the air line glad hands to each other ( or dummy couplers) when you’re not towing a trailer
Ans: It will keep water out of the lines
Q. After you connect the airlines, but before you back under the trailer, you should
Ans: Supply airline two trailer system, then pull out of the air supply knob
Q. To unlock the fifth wheel, Port the release handle to the___position
Ans: Open
Q. Air and electronic lines for the tractor to the trailer should be
Ans: Secured, but with enough slack for turns.
California CDL Combination Vehicles Test Answers – Model 2
Q. Compared to straight trucks or buses, there are___things to inspect on a combination vehicle
Ans: More
Q. Which part of the kingpin should the locking jaws close around
Ans: The shank
Q. After you lock the kingpin into the fifth wheel, you should check the connection by pulling
Ans: The tractor ahead gently with the trailer brakes locked
Q. When should you use shocks to park a trailer not equipped with spring brakes
Ans: Always
Q. You have pushed in the trailer supply valve. You should not move the tractor into the whole air system is
Ans: At normal pressure
Q. To stop the trailer skid you should
Ans: Release the brakes
Q. In general, the higher your truck’s center of gravity the
Ans: Easier it is to turn over
Q. If you cannot make a turn without entering another chuckling, you should
Ans: Turn wide as you complete that turn
Q. For a coupling to be completed, the safety catch for the fifth wheel locking lever it must be
Ans: Over the locking lever
Q. You are coupling a semi-trailer to your tractor but have not backed up under it. The trailer is at the right height when
Ans: It will raise slightly when the tractor is back under it
Q. When checking that the trailer is securely coupled to the tractor, the landing gear should be
Ans: Slightly raised
Q. When coupling, the proper position for the fifth wheel is
Ans: Tilted down toward the end of the tractor
Q. After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in the___position
Ans: Normal
Q. When you were uncoupling a loaded trailer, lower the landing gear until it
Ans: Makes from contact with the ground
Q. You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes, you should
Ans: Back object me to ease pressure on the fifth wheel locking jaw
Q. You want to inspect the trailer support. You should place the tractor transmission in which gear after you have uncoupled the trailer
Ans: Neutral
Q. When backing a tractor under a trailer you should
Ans: Always use the lowest reverse gear
Q. How much space should be between the upper and lower fifth wheel air coupling
Ans: None
Q. After you lock the kingpin into the fifth wheel, you should check the connection by pulling
Ans: The tractor ahead gently with the trailer brakes locked
Q. After you supply air to the trailer, make sure the airlines are not crossed in the trailer brakes are working. You do this bye
Ans: Applying/releasing the trailer brakes and listening to break sounds
Q. Which part of the king pin should the locking jaws close around
Ans: The shank
Q. Why should you be sure that the fifth wheel plate is greased as required
Ans: To prevent steering problems
Q. When checking the trailers emergency brakes, the tractor protection Control valve should be placed in the___position
Ans: Emergency
Q. The front trailer supports or up in the trailer is resting on the tractor. Make sure
Ans: There’s enough clearance between the tractor frame and the landing gear
Q. How should you test the tractor-semi-trailer connection for security
Ans: Pull gently ford in low gear against the locked trailer brakes
Q. When driving a set of doubles, it is necessary to close the___shut off valve in the last trailer
Ans: Back
Q. You supply air to the trailer thanks bye
Ans: Pushing in the trailer air supply control valve
Q. Airlines on a combination vehicle are often color to keep from getting mixed up. The emergency line is___. The service line is___
Ans: Red, blue
Q. If the spring breaks don’t release when you push the trailer supply control, you should
Ans: Check the airline connections
Q. What should you do if your vehicle gets stuck on a raised railroad track crossing
Ans: Get out of the vehicle and away from the tracks
Q. When connecting The gladhands, press the two seals of the couplers together at the __ degree angle to one another
Ans: 90
Q. A tractor-trailer vehicle combination is most likely to roll over in a turn when the configuration includes
Ans: Triple 27 feet trailers
Q. Loss of air pressure in emergency lines causes
Ans: The trailers emergency brakes to come on
Q. What will happen if the air lines are crossed when you hook up an old trailer with no spring breaks
Ans: You could drive away with no trailer brakes
Q. When should you use the hand valve to park a combination vehicle
Ans: Never
California CDL Combination Vehicles Test Answers – Model 3
Q. Your emergency airline breaks are getting pulled apart while you were driving. The loss of pressure will cause the
Ans: Emergency trailer brakes to come on
Q. How do you know if the trailer you are driving has antilock brakes?
Ans: Yellow ABS malfunction lamp on the left side of your trailer
Q. Semi-trailers made before 1975 that are equipped with airbrakes
Ans: Often do not have spring breaks
Q. If you are coupling a tractor and a semi-trailer and have connected the airlines, what should you do before backing under the trailer?
Ans: Supply air to the trailer system, then pull out the air supply knob to lock the trailer brakes
Q. The trailer air supply control should automatically close when the pressure falls to below
Ans: 20 and 45
Q. To prevent a jackknife in normal driving, some drivers use a handbell before stepping on the brake pedal. Which of the statements is true
Ans: It should not be done
Q. A tractor-trailer vehicle combination is most likely to roll over and intern when the configuration includes
Ans: Triple 27-foot trailers
Q. The hand valve should be used
Ans: To test the trailer brakes
Q. Having antilock brakes on only your trailer will
Ans: Give you more control of the vehicle when braking
Q. When connecting the gladhands, press the two CEOs of the couplers together at a degree angle to one another
Ans: 90
Q. You should get out of your vehicle and back with the trailer
Ans: When you are unsure of your path of travel
Q. TRUE OR FALSE: More than half of truck driver deaths in crashes are the result of truck rollovers.
Ans: True
Q. Fully loaded rigs are _ times more likely to roll over in a crash than empty rigs.
Ans: 10
Q. What can you do to prevent rollovers?
Ans:
– keep the cargo close to the ground
– drive slowly around turns
Q. TRUE OR FALSE: Keeping cargo low is even more important in combination vehicles than in straight trucks.
Ans: True
Q. Rollovers happen when you turn too___
Ans: Fast
Q. Trucks with trailers have a dangerous…
Ans: crack the whip effect
Q. TRUE OR FALSE: When pulling trailers, a sudden movement with your steering wheel may cause your trailer to tip over.
Ans: True
Q. Large combination vehicles take longer to stop when they are…
Ans: Empty
Q. How much following distance should you have?
Ans: At least 1 second for every 10 feet of vehicle length under 40 mph.
Q. How much following distance should you have driving 50 mph?
Ans: At least 1 second for every 10 feet of your vehicle plus an additional second.
Q. When lightly loaded, the very stiff suspension springs and strong brakes give poor traction.
Ans: True
Q. TRUE OR FALSE: Tests have shown that bobtails are easy to stop.
Ans: False
Q. In any combination rig, allow lots of _ distance and look far ahead.
Ans: Following
Q. What is the best way to recognize that the trailer has started to skid?
Ans: Seeing it in your mirrors.
Q. TRUE OR FALSE: When braking hard you should check your mirrors to make sure that your trailer is staying where it should.
Ans: True
Q. Why should you not use the trailer hand brake to straighten out a jackknifing trailer?
Ans:
– This is the wrong thing to do since the brakes on the trailer wheels caused the skid in the first place.
– Once the trailer wheels grip the road again, the trailer will start to follow the tractor and straighten out.
Q. What is off tracking?
Ans:
– When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels.
– Longer vehicles will be off track.
Q. TRUE OR FALSE: If you must back on a curved path, back to the driver’s side so you can see.
Ans: True
Q. What type of trailers can get stuck on rail-road highway crossing?
Ans:
– Lowboy
– Car Carrier
Q. Why should you not use the trailer hand valve while driving?
Ans:
– The trailer hand valve should only be used to test the brakes.
– Do not use it in driving because of the danger of making the trailer skid.
Q. Describe what trailer air supply control does.
Ans:
– You push it in to supply the trailer with air, pull it out to shut the air off, and put on the trailer emergency brakes.
– The valve will pop out ( closing the tractor protection valve ) when the air pressure drops into the range of 20-45 psi.
Q. Describe what the service line is for.
Ans:
– The service line ( called the control line ) carries air, which is controlled by the foot brake or the trailer hand brake.
– Depending on how hard you press the foot brake or hand valve, the pressure in the service line will similarly change.
Q. What does the emergency air line do?
Ans:
– It supplies air to the trailer air tanks
– Loss of air pressure in the emergency line causes the trailer emergency brakes to come on.
Q. TRUE OR FALSE: Blue is used for the service line and red for the emergency.
Ans: True
California CDL Combination Vehicles Test Answers – Model 4
Q. Why should you use chocks when parking a trailer without spring brakes?
Ans: Eventually, the air will leak away and there will be no brakes.
Q. Where are shut-off valves?
Ans: In the back of the trailer.
Q. TRUE OR FALSE: You may not notice a major leak in the service line until you try and put on the brakes.
Ans: True
Q. TRUE OR FALSE: All new trailers and converter dollies are required to have anti-lock brakes.
Ans: True
Q. TRUE OR FALSE: ABS will increase your stopping distance.
Ans: False
Q. TRUE OR FALSE: Trailers will have yellow ABS malfunction lamps on the right side of the trailers.
Ans: False
Q. When you drive a tractor-trailer combination with ABS, you should…
Ans: Brake as you always have.
Q. TRUE OR FALSE: If your ABS malfunctions, you will lose your brakes
Ans: False
Q. TRUE OR FALSE: ABS makes it possible to drive faster and more safely.
Ans: False
Q. When coupling you should inspect the 5th wheel which will include…
Ans:
– Grease on the 5th wheel plate
– 5th wheel in proper position and tilted down toward the rear of the tractor, with jaws open
Q. When coupling, the tractor should be…
Ans: Directly in front of the trailer.
Q. When coupling you should back…
Ans: slowly
Q. How do you know if the trailer is at the proper height?
Ans: The trailer should be low enough that it is raised slightly by the tractor when the tractor is backed under it.
Q. When coupling, you should back using…
Ans: The lowest reverse gear
Q. How do you check for a secure connection?
Ans: Pull the tractor gently while the trailer brakes are still locked to check that the trailer is locked on the tractor.
Q. What might happen if the trailer is too high when you try to a couple?
Ans: You will miss and not get a coupling.
Q. After coupling, how much space should be between the upper and lower 5th wheel?
Ans: None
Q. TRUE OR FALSE: You should look into the back of the 5th wheel to see if it is locked into the kingpin.
Ans: True
Q. TRUE OR FALSE: To drive, you need to raise the landing gear only until it just lifts off the pavement.
Ans: False
Q. How can you test that air flows to all trailers?
Ans:
– Go to the rear of the rig. Open the emergency line shut-off valve at the rear of the last trailer.
– You should hear air escaping, showing the entire system is charged.
Q. How can you test the tractor-protection valve?
Ans: Push in the “air supply” knob, and step on and off the brake pedal several times to reduce the air pressure in the tanks.
Q. How can you test the trailer emergency brakes?
Ans:
– Charge the trailer air brake system and check that the trailer rolls freely.
– Then stop and pull out the trailer air supply control ( also called tractor protection valve )
Q. How can you test the trailer service brakes?
Ans: At normal air pressure, release the parking brakes. Move the vehicle forward slowly, and apply the trailer hand brake.
Q. TRUE OR FALSE: The tractor protection valve will pop when the pressure falls to 100 psi
Ans: False
Q. TRUE OR FALSE: The tractor protection valve will pop when the pressure falls between 20-45 psi.
Ans: True
Q. Where should the tractor be when you inspect landing gear after uncoupling the trailer?
Ans: With the tractor frame under the trailer
Q. While driving behind another vehicle under the good condition you should allow at least one second between your vehicle and the vehicle ahead for each_______(how many) feet of your vehicle length?
Ans: 10
Q. There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo close to the ground as possible; and (2)?
Ans: Go slow around turns
Q. The air brake leakage rate for a combination vehicle(engine off, brakes off) should be less than _____psi per minute.
Ans: 3
Q. The safest way to make turn without entering another traffic lane is?
Ans: You should turn wide as you complete the turn
Q. The higher the center of gravity of your truck, the?
Ans: Easier to turn over
Q. If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
Ans: Nothing is likely to happen until you try to apply the brakes
Q. Glad hands are usually connecting which of these?
Ans: Service and emergency air lines from the vehicle to the trailer
Q. A driver crosses the airline when hooking up to an old trailer. What will happen?
Ans: If the trailer has no spring brakes, you could drive away but you wouldn’t have trailer brakes
Q. The hand valve should be used?
Ans: To test the trailer brakes
California CDL Combination Vehicles Test Answers – Model 5
Q. When driving a set of doubles it is necessary to close which shut-off valve in the last trailer?
Ans: Back
Q. If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
Ans: Nothing is likely to happen until you try to apply the brakes.
Q. You are about to back your tractor under a semitrailer. The trailer is at the right height when the?
Ans: Trailer will be lifted slightly when the tractor backs under it
Q. Your emergency air line breaks or gets pulled while you are driving. The loss of pressure will cause the?
Ans: Emergency trailer brakes to come on
Q. If the brakes are not released when you pushed the trailer air supply valve you should?
Ans: Check airline connection
Q. Airbrake-equipped trailers made before 1975?
Ans: Often do not have spring brakes
Q. There are two things that a driver can do to prevent a rollover. They are:(1) go slow around turns; and (2)?
Ans: Keep the cargo as close to the ground as possible
Q. After connecting the airlines but before backing under the trailer you should?
Ans: Supply air to the trailer system, then pull out the air supply knob
Q. Which part of the kingpin should the locking jaws close around?
Ans: The shank
Q. How much space should be allowed between the upper and lower fifth wheel after coupling?
Ans: Nothing
Q. You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is?
Ans: At normal pressure
Q. You are coupling a tractor to a semitrailer. You have connected the airline. Before backing under the trailer you should?
Ans: Supply air to the trailer system, then pull out the air supply knob
Q. You are coupling a tractor to a semitrailer and have backed up but are not under it. What should you hook up before backing under?
Ans: The emergency and service airlines
Q. Tractor with_____ trailer requires the shortest amount of stopping distance.
Ans: Fully loaded
Q. There are two things that a driver can do to prevent a roller. They are: (1) keep the cargo as close to the ground as possible; and (2)?
Ans: Go slow around turns
Q. After you have coupled the trailer you should have to raise the landing gear by using?
Ans: Low gear
Q. You supply air to the trailer tanks by?
Ans: Pushing in the trailer air supply valve
Q. There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns; and (2)?
Ans: Keep the cargo as close to the ground as possible
Q. Why should you be sure that the fifth wheel plate is greased as required?
Ans: To prevent steering problems
Q. Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the?
Ans: Emergency trailer brakes to come on
Q. When connecting the glad hands press the two seals with the coupling together at what degree to each other?
Ans: 90 degrees
Q. Which of these statements is true?
Ans: Bobtail tractors can take longer to stop than a combination vehicle loaded to maximum gross weight
Q. Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
Ans: It will keep dirt or water out of the lines
Q. When backing a tractor under a trailer you should?
Ans: Always use the lowest reverse gear
Q. After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?
Ans: Normal
Q. The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that?
Ans: The coupling is not right and should be fixed before driving the coupled unit
Q. Off-tracking or cheating causes of which of these to follow the wider pass while making a turn?
Ans: Tractor towing a 45-feet trailer
Q. The iron trailer supports are up and the trailer is resting on the tractor. Make sure?
Ans: There is enough clearance between the tractor frame and the landing gear
Q. When you are uncoupling a loaded trailer you should lower the landing gear until it?
Ans: Make firm contact with the ground, then crackle hits a low gear a few extra turns
Q. What will happen if the air lines are crossed when you hook up to an old trailer?
Ans: If the trailer has no spring brakes, you could drive away but you couldn’t have trailer brakes
Q. There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible; and (2)?
Ans: Go slow around turns
Q. To stop a trailer skid you should?
Ans: Release the service brakes
Q. If you cannot make a turn without entering another traffic lane?
Ans: You should turn wide as you complete the turn
Q. The airlines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is, and the service line is____.
Ans: Red, blue
Q. The semitrailer made before 1975 that are equipped with air brakes?
Ans: Often do not have spring brakes
California CDL Combination Vehicles Test Answers – Model 6
Q. The air leakage rate for a combination vehicle (engine off, brakes on) should be less than____psi per minute
Ans: 4
Q. What is the best way to test the trailer service brakes?
Ans: Pull forward very slowly, then apply the trailer brakes with your hand control
Q. Compared to a straight truck or bus there are______ things to inspect in combination vehicle.
Ans: More
Q. When checking the trailer emergency brakes the tractor protection control valve should be placed in what position?
Ans: Emergency
Q. You are about to go down a long, steep, downhill grade in a newer truck. You should:
Ans: use a lower gear than you would use to climb the uphill grade.
Q. In normal driving, some drivers use the hand valve before the brake pedal to prevent a jackknife. Which of the statements is true?
Ans: It should not be done
Q. Which of these items is checked in a pre-trip inspection?
Ans:
– Cargo securement.
– Whether all vehicle lights are working and are clean.
Q. While checking if the trailer is securely coupled to the trailer the landing gears should be?
Ans: Slightly raised
Q. If you are stopped on a one-way or divided highway, you should place reflective triangles at:
Ans: 10 feet, 100 feet, and 200 feet toward approaching traffic.
Q. Air and electrical lines from the tractor to the trailer should be?
Ans: Secured but with enough loop to turn
Q. You have a major leak in the service line and you put on the brakes. Service air will escape and cause the?
Ans: Trailer emergency brakes to come on
Q. When a heavy fog occurs you should:
Ans: park at a rest area or truck stop until the fog has lifted.
Q. A tractor with a _ trailer requires the shortest amount of stopping distance.
Ans: Fully loaded
Q. You should plan ahead when you park your vehicle so that:
Ans: you are only required to pull forward when you leave.
Q. When you get ready to back under a semitrailer you should line up?
Ans: Directly in front of the trailer
Q. Off-tracking or cheating causes which of these to follow the wider pass while making a turn?
Ans: Tractor towing a 45-feet trailer
Q. The term “Gross Combination Weight” refers to:
Ans: total weight of a powered unit, the trailer and the cargo.
Q. You should not back a tractor under a trailer until the whole air system is?
Ans: At normal pressure
Q. After you lock the kingpin into the fifth wheel, you should check the connection by?
Ans: Pulling the tractor ahead gently with the trailer brakes locked
Q. A driver should look _ ahead of the vehicle while driving.
Ans: 12–15 seconds
Q. When should you use the hand valve to park a combination vehicle?
Ans: Never
Q. You have coupled with a semitrailer. Where should you put the iron trailer supports before driving away?
Ans: Fully raised with the crank handle secured in its bracket
Q. The safety catch for the fifth wheel locking lever must be __ for a coupling to be complete.
Ans: Over the locking lever
Q. After you supply air to the trailer, make sure the airlines are not crossed and the trailer brakes are working. This is done by?
Ans: Applying and releasing the trailer brakes and listening for the sound of the brake
Q. Before you back under a trailer, make sure that?
Ans: The trailer brakes are locked
Q. How should you test the tractor-semitrailer connection for security?
Ans: Pull gently forward in the low gear against the locker trailer brakes then look at it carefully
Q. To unlock the fifth wheel the locking lever should be placed in the __ position
Ans: Open
Q. The tractor protection valve will close and the trailer emergency brake will come on when there is a major leak in the ______brake line.
Ans: Emergency
Q. When coupling, the proper position of the fifth wheel is?
Ans: Tilted down toward the end of the trailer
Q. What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports?
Ans: Neutral
Q. When uncoupling the trailer, after you shut off the trailer air supply and lock the trailer brakes, you should?
Ans: Back up gently to ease pressure on the fifth wheel
Q. You are driving a combination vehicle when the trailer breaks away, pulling apart both airlines. Do you expect the trailer brakes to come on?
Ans: The tractor protection valve to close
Q. A broken exhaust system is dangerous because:
Ans: Toxic fumes and gasses could enter the cab or sleeper berth.
About California CDL Combination Vehicle Test
California CDL Combination Vehicle test is an endorsement test that is mandatory for individuals who wish to drive a trailer across CA.
Please keep in mind that, before you take CDL Combination Vehicle test first you must pass CDL test based on the official CDL manual. You can check Q&A for those topics by simply visiting the following link: https://www.californiatomorrow.org/california-cdl-test-questions-and-answers/
This test format includes:
- Total 20 questions
- Multiple-choice format
- The passing score should be 80% or higher
- Only written exams allowed
Read More about the Combination Vehicle study chart: https://www.dmv.ca.gov/portal/handbook/commercial-driver-handbook/section-6-combination-vehicles/
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