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- California CDL Doubles/Triples Test Answers – 330+ Solved
- California CDL Doubles/Triples Test Answers – Model 1 Q&A
- California CDL Doubles/Triples Test Answers – Model 2 Q&A
- California CDL Doubles/Triples Test Answers – Model 3 Q&A
- California CDL Doubles/Triples Test Answers – Model 4 Q&A
- California CDL Doubles/Triples Test Answers – Model 5 Q&A
- California CDL Doubles/Triples Test Answers – Model 6 Q&A
- California CDL Doubles/Triples Test Answers – Model 6 Q&A
- California CDL Doubles/Triples Test Answers – Model 7 Q&A
- About California CDL Doubles/Triples Test
California CDL Doubles/Triples Test Answers – 330+ Solved
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California CDL Doubles/Triples Test Answers – Model 1 Q&A
Q. When driving with more than one trailer, which trailer should be the first one behind the tractor?
Ans: The heaviest trailer
Q. You are driving a 100-foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least __ seconds of space ahead of you.
Ans: 11
Q. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rig’s rear. When you do this, you should hear:
Ans: Air escape from the open valve
Q. You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
Ans: Use controlled or stab braking
Q. Converter dollies:
Ans: Often do not have spring brakes
Q. The crack-the-whip effect that troubles trucks with trailers. Which is most likely to tip over:
Ans: The rear trailer of a triple
Q. You are doing a walk-around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are _ and the pintle hook is _.
Ans: Closed, latched
Q. When does the “driver’s manual” advise disconnecting the steering axle brakes to help keep the rig straight?
Ans: Never
Q. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen?
Ans: The dolly tow bar may fly up
Q. You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?
Ans: None
Q. Which of these statements about quick steering movements and doubles/triples is true?
Ans: Doubles/triples flip over from quick steering moves more easily than many other vehicles
Q. Empty trucks may have poor traction due to _ and wheel __.
Ans:
– bouncing
– lockup
Q. You are driving a 100-foot truck with double trailers at 30 mph. The road is dry. Visibility is good. You should keep at least __ seconds of space ahead of you:
Ans: 10
Q. If you want to couple a second trailer to your combination vehicle, secure it by using:
Ans:
– The trailer’s spring brakes and emergency air brakes
– Wheel chocks
Q. The best way to stop all skids is to:
Ans: Restore traction to the tires
Q. Driving a truck with double or triple trailers requires a driver to:
Ans:
– Use special care in bad weather and mountain conditions
– Allow more following distance than for smaller vehicles
Q. The best way to keep brakes from overheating while going down a steep grade is to:
Ans: Go 5 m.p.h. below your safe speed
Q. If you must drive through deep puddles or flowing water, which of these should you not do?
Ans: Drive through quickly
Q. Some large trucks have convex or “spot” mirrors.
Ans: Make things look smaller and farther away than they really are
Q. At highway speed, you should look up to _ mile ahead of your truck Ans: 1/4 Q. Many drivers do not _ of their truck.
Ans: look far enough ahead
Q. Good drivers shift their attention _and forth, and _.
Ans: back and forth, near and far
Q. When should you check your mirrors while making a lane change?
Ans:
– After signaling the change
– Right after starting the lane change
– After completing the lane change
Q. TRUE or FALSE. Always keep your vehicle to the right side of your lane
Ans: FALSE
Q. TRUE or FALSE. You should avoid traveling next to others when possible
Ans: TRUE
Q. A movement with the steering wheel can result in a rear trailer.
Ans:
– sudden
– tipped over
Q. How can you be sure you supplied air to a second trailer?
Ans: Go to the rear of the second trailer and open the emergency line shut off
Q. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when:
Ans: The trailer will be raised slightly when the converter dolly is backed under it.
Q. You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
Ans: Supply air to the trailer air system with the tractor and then disconnect the emergency line
Q. What is not a good thing to do when driving on slippery roads?
Ans: Use the engine brake or speed retarder
Q. What will result in the best control on curves?
Ans: Slowing to a safe speed before entering the curve, then accelerate slightly during the curve
Q. You are driving a set of doubles. A set of trailer wheels goes into a skid. What is most likely to occur?
Ans: You will have a trailer jackknife
Q. Before you can supply air to the air tanks of a second trailer you need to:
Ans: Open the shut-off valves at the rear of the first trailer, and close the shut-off valves at the rear of the second trailer.
California CDL Doubles/Triples Test Answers – Model 2 Q&A
Q. The best way to stop any skid is to:
Ans: Restore traction to the tires
Q. Which of these statements is true about quick steering movements with a set of doubles or triples?
Ans: A set of doubles or triples turn over more easily than any other vehicle combinations
Q. Which of these statements is true about managing space on the sides of your vehicle?
Ans: Avoid traveling next to others when possible
Q. Before you can supply air to the air tanks of a second trailer you need to:
Ans: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer
Q. During normal operation, the brakes on a set of double or triple trailers are controlled by the:
Ans: Foot pedal
Q. For coupled double or triple trailers, all of the converter dolly shut-off valves should be:
Ans: Open
Q. Check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is correct when the:
Ans: Trailer raises slightly when the converter dolly is backed under it
Q. When testing the coupling of double trailers, the landing gear of the rear trailer should be:
Ans: Slightly raised
Q. Which of these statements is true about speed management and braking?
Ans: You need about four times as much stopping distance at 40 mph as you need at 20 mph
Q. You are driving on a slippery road during the day. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck?
Ans: Allow “much more space” than is needed for ideal driving conditions
Q. Empty or lightly loaded trucks:
Ans: May have poor traction due to bouncing and wheel lockup
Q. Which of these statements is true?
Ans: When coupling a set of doubles or triples, be sure the pintle-eye of the dolly is in the proper place
Q. Which of these statements is true about checking your mirrors?
Ans: Use the mirrors to look for tire fires
Q. Which of these statements is true about seeing ahead?
Ans: Good drivers shift their attention back and forth, near and far
Q. Which of these actions is not a good thing to do when driving on slippery roads?
Ans: Use the engine brake or speed retarder
Q. With the hand valve on, you should test the trailer brakes by opening the service line at the rear of the rig. When you do this, you should hear:
Ans: The emergency line valve open and release air
Q. A converter dolly is still under the second trailer when you unlock the pintle hook. What is likely to happen?
Ans: The dolly tow bar may fly up
Q. To check that the converter dolly is securely coupled to the rear trailer, you should:
Ans: Pull gently against the pin of the second semitrailer
Q. Which of these actions will result in the best control on a curve?
Ans: Slow to a safe speed before entering the curve, then accelerate slightly through it
Q. You cannot avoid driving through deep or flowing water. You should not:
Ans: Drive through quickly and for a short distance after coming out of the water
Q. Some large trucks have convex or “spot” mirrors. These mirrors:
Ans: Make things look smaller and farther away than they really are
Q. You are inspecting a double or triple-trailer rig. You should be sure the converter dolly air tank drain valves are and the pintle hook is ____.
Ans: Closed; latched
Q. When you drive a set of double or triple trailers, you need more space because they:
Ans: Can’t be stopped or turned quickly
Q. You can release the dolly brakes by:
Ans: Opening the air tank pet hook
Q. Converter dollies are used to connect:
Ans: A tractor-trailer combination to another trailer
Q. You are driving with a set of double trailers. You need to use your brakes to avoid a crash. For emergency braking you should use:
Ans: Controlled or stab braking
Q. You are driving 35 mph with a set of double trailers. You should leave at least __ of space in front of your vehicle for every ten feet of vehicle length.
Ans: 1 second
Q. Which of these statements is true about emergency steering?
Ans: A move to the right may still be best if you have traffic on both sides of your vehicle.
Q. TRUE or FALSE. High winds are not a problem for doubles and triples
Ans: FALSE
Q. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be:
Ans: Closed
California CDL Doubles/Triples Test Answers – Model 3 Q&A
Q. Always couple the lightest trailer behind the tractor and the heaviest trailer to the rear of the combination when pulling two trailers. True or False?
Ans: False
Q. Before you can supply air to the air tanks of a second trailer you need to
Ans: open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer, and close the converter dolly air tank drain valve.
Q. When hooking the dolly to the rear trailer, the trailer height
Ans:
– must be slightly lower than the center of the fifth wheel;
– should allow the trailer to raise slightly when the dolly is pushed under it.
Q. Converter dollies
Ans: often do not have spring brakes
Q. Double trailers jackknife more easily when loaded. True or False?
Ans: False
Q. If you are in a skid you should:
Ans: take your foot off the brake and restore traction to the tires.
Q. If the dolly has air brakes, they are released by opening the air tank petcock. True or False?
Ans: True
Q. When pulling doubles and triples you should always look at least 12-15 seconds ahead. At highway speed, this will be
Ans: about 1/4 mile.
Q. It is a good habit to chock the wheels before coupling a second trailer to your rig? True or False?
Ans: True
Q. While driving in a rainstorm during the day, how much following distance you should maintain from the vehicle ahead of you?
Ans: Allow “much more space” than is needed for ideal driving conditions.
Q. Never unlock the pintle hook with the dolly still under the rear trailer. True or False?
Ans: True
Q. On slippery roads you must avoid…
Ans:
– braking too hard;
– accelerating too hard;
– following too closely.
Q. The converter dolly should be positioned in front of the second trailer and in line with the kingpin. True or False?
Ans: True
Q. What is the procedure to make sure that you supplied air to the rear trailer?
Ans: Open the emergency line shut-off on the rear trailer.
Q. The trailer should be slightly lower than the center of the fifth wheel. True or False?
Ans: True
Q. When coupling a second semi-trailer, the dolly should always be at least one yard away from the nose of the trailer. True or False?
Ans: False
Q. Regardless of the type of skid, to restore vehicle control, you must…
Ans: restore traction to the tires
Q. There should be no space between the upper and lower fifth wheel when properly coupled. True or False?
Ans: True
Q. Do all converter dollies have spring brakes? Yes or No?
Ans: No
Q. To set the trailer emergency brakes if the second trailer does not have spring brakes, you should drive the tractor close to the trailer, connect the emergency line and charge the air tank, then disconnect the emergency line. True or False?
Ans: True
Q. What is a converter dolly?
Ans: A converter dolly allows a vehicle equipped for commercial towing to accept a 5th-wheel trailer. It has a full axle and helps balance the weight of the load and the trailer on the towing vehicle.
Q. To connect the converter dolly to the front trailer, you should lock the pintle hook and secure the converter gear support in the raised position. True or False
Ans: True
Q. What is the best way to keep your brakes from overheating when going down a long grade?
Ans: Get in proper gear, use the braking effects of engine and apply brakes firmly when “safe” speed is reached.
Q. Unlocking the pintle hook with the dolly still under the rear trailer….
Ans: could cause the dolly tow bar to fly up, possibly causing injury.
Q. When pulling more than one trailer, which of the following is correct?
Ans: The heaviest trailer must always be in the first position behind the tractor.
Q. When making a lane change, when should you check your mirrors?
Ans: After completing the lane change
Q. When performing a vehicle inspection in a two-trailer rig, the shut-off valves at the rear of the front trailers should be open? True or False?
Ans: True
Q. When the full weight of a trailer is resting on the tractor, you should hit the landing gear at approximately a 30-degree angle? True or False
Ans: False
Q. When inspecting double trailers, the shut-off valves at the rear of the last trailer should be open? True or False?
Ans: False
Q. When pulling double trailers, you should brake firmly while going through a curve. True or False?
Ans: False
Q. With the hand valve applied, you test trailer brakes by opening the service line valve at the rear of the last trailer. You should….
Ans: hear air escaping from the open valve.
Q. A sudden steering movement may result in the rear trailer rolling over? True or False?
Ans: True
California CDL Doubles/Triples Test Answers – Model 4 Q&A
Q. At highway speeds, you should look at least ahead of your truck?
Ans: 1/4 mile
Q. Good drivers shift their attention….
Ans: back and forth, near and far.
Q. Many drivers do not look far enough ahead when driving, true or false?
Ans: True
Q. While driving a double, you must make a quick stop in order to avoid a crash. You should….
Ans: use controlled or stab braking.
Q. Empty trucks may have poorer traction due to bouncing and wheel lockup? True or False?
Ans: True
Q. You should check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is right when…
Ans: the trailer will be raised slightly when the converter dolly is backed under it.
Q. You should check for air at the rear of the second trailer by opening the emergency line, true or false?
Ans: True
Q. You should release the dolly brakes before disconnecting the dolly air and electric lines when uncoupling the rear trailer, true or false?
Ans: False
Q. You are driving a 62-foot-long double-trailer combination at 35 mph. The pavement is dry and visibility is excellent. How much following distance in seconds should you maintain at all times?
Ans: 6 seconds
Q. You should use the trailer brakes to stop a skid, true or false?
Ans: False
Q. What is a converter dolly used for?
Ans: To couple tow two or three trailers behind a tractor-trailer.
Q. You should pull the tractor forward gently while the trailer brakes are still locked to check that the trailer is locked into the tractor, true or false?
Ans: True
Q. You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?
Ans: None
Q. You are driving a triple rig. Which trailer is most likely to turn over in an emergency maneuver?
Ans: Rear trailer
Q. You are doing a walkaround inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are closed and the pintle hook is latched. True or false?
Ans: True
Q. You are driving a 90 ft. long double-trailer combination at 45 mph. Pavement is dry and visibility is excellent. How much following distance in seconds should you maintain?
Ans: 10 seconds
Q. You should release the pintle hook on the first semi-trailer before pulling clear of the converter dolly, true or false?
Ans: True
Q. “Spot,” convex or “bug-eye” mirrors….
Ans: make objects appear smaller and farther away than they really are.
Q. What is a converter dolly?
Ans: A converter dolly allows a vehicle equipped for commercial towing to accept a 5th-wheel trailer. It has a full axle and helps balance the weight of the load and the trailer on the towing vehicle.
Q. Do all converter dollies have spring brakes? Yes or No?
Ans: No
Q. What is a converter dolly used for?
Ans: To couple tow two or three trailers behind a tractor-trailer.
Q. What three methods can you use to secure a second trailer before coupling?
Ans:
– Release dolly brake by opening the air tank petcock or if the dolly has a spring brake, use the dolly parking brake control;
– Wheel the dolly into position by hand so it is in line with the kingpin;
– Use the tractor and first semi-trailer to pick up the converter dolly and move it into position.
Q. You should use different methods for uncoupling second and third trailers? True or False?
Ans: False
Q. Which of these statement is true about checking your mirrors?
Ans: Use the mirrors to look for tire fires
Q. Coupling and uncoupling methods are the same for more common tractor-trailer combinations, but there are other ways of coupling and uncoupling the many types of truck-trailer combinations that are in use? True or False?
Ans: True
Q. For coupled double or triple trailers, all of the converter dolly shut-off valves should be:
Ans: Open
Q. Should you do a walk-around inspection when preparing to pull Doubles or Triples? Yes or No?
Ans: Yes
Q. The best way to stop any skid is to:
Ans: Restore traction to the tires
Q. Which of these statements is true about quick steering movements with a set of doubles or triples?
Ans: A set of doubles or triples turn over more easily than other vehicles combinations
Q. Which of these statements is true about managing space on the sides of your vehicle?
Ans: Avoid traveling next to others when possible
Q. Before you can supply air to the air tanks of a second trailer you need to:
Ans: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer
California CDL Doubles/Triples Test Answers – Model 5 Q&A
Q. During normal operations, the brakes on a set of double or triple trailers are controlled by the:
Ans: Foot pedal
Q. There are more things to inspect on a combination vehicle than on a single vehicle. True or False?
Ans: True
Q. Check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is correct when the:
Ans: Trailer rises slightly when the converter dolly is backed under it
Q. When testing the coupling of double trailers, the landing gear of the rear trailer should be:
Ans: Slightly raised
Q. Which of these statements is true about speed management and braking?
Ans: You need about four times as much stopping distance at 40 mph as you need at 20 mph
Q. You are driving on a slippery road during the day. What does the Commercial Driving Handbook say about how much space you should keep ahead of your truck?
Ans: Allow “much more space” than is needed for ideal driving conditions
Q. Empty or lightly loaded trucks:
Ans: May have poor traction due to bouncing and wheel lockup
Q. Which of these statements is true?
Ans: When coupling a set of doubles or triples, be sure the pintle-eye of the dolly is in the proper place
Q. The dolly tow bar may fly up if you unlock the pintle hook with the converter dolly still under the rear trailer? True or False?
Ans: True
Q. Which of these statements is true about seeing ahead?
Ans: Good drivers shift their attention back and forth, near and far
Q. Which of the following is the correct position for shut-off valves for a set of doubles or triples?
Ans: Open for the rear of the front trailers and closed for the rear of the last trailer
Q. What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
Ans: The dolly tow bar may fly up
Q. You are driving a set of doubles when a set of trailer wheels starts to skip. Which of the following is most likely to occur?
Ans: The trailer will jackknife
Q. When uncoupling the rear semi-trailer, you should lower the converter dolly landing gear:
Ans: Enough to remove some of the weight from the dolly
Q. The dolly tow bar may fly up if you unlock the pintle hook with the converter dolly still under the rear trailer. True or False?
Ans: True
Q. Which of these statements is true?
Ans: A set of doubles or triples must be driven very smoothly to avoid a rollover or jackknife
Q. When driving a truck with more than one trailer, which trailer should be first behind the tractor?
Ans: The heaviest
Q. How can you be sure you supply air to a second trailer?
Ans: Go to the rear of the second trailer and open the emergency line shut-off
Q. You are driving a 100-foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least _ seconds of space ahead of your vehicle.
Ans: 11
Q. Driving a truck with a set of double or triple trailers requires the driver to:
Ans: Allow more following distance than for smaller vehicles
Q. You want to lock your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
Ans: Charge the trailer air tank and then disconnect the emergency line
Q. When you inspect a set of coupled doubles or triples, make sure the pintle hooks are:
Ans: Latched
Q. A converter dolly has:
Ans: A separate air supply tank
Q. The converter dolly air tank drain valve on coupled double and triple trailers should be:
Ans: Closed
Q. A safe driving speed on a curve for a normal tractor trailer:
Ans: May be too fast for a set of doubles or triples
Q. Which of these statements is true?
Ans: A set of doubles or triples must be driven very smoothly to avoid a rollover or jackknife
Q. Which of the following is the correct position for shut-off valves for a set of doubles or triples?
Ans: Open for the rear of the front trailers and closed for the rear of the last trailer
Q. You want to lock your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
Ans: Charge the trailer air tank and then disconnect the emergency line
Q. You are driving a set of doubles when a set of trailer wheels starts to skid. Which of the following is most likely to occur?
Ans: The trailer will jackknife
Q. When uncoupling the rear semi trailer, you should lower the converter dolly landing gear:
Ans: Enough to remove some of the weight from the dolly
Q. You should use different methods for uncoupling second and third trailers. True or False?
Ans: False
Q. When driving a truck with more than one trailer, which trailers should be first behind the tractor?
Ans: The heaviest
California CDL Doubles/Triples Test Answers – Model 6 Q&A
Q. Driving a truck with a set of double or triple trailers required the driver to:
Ans: Allow more following distance than for smaller vehicles
Q. If you want to couple a second trailer to your combination vehicle, secure it by using the:
Ans: Trailer emergency air brakes
Q. When you inspect a set of couple doubles or triples, make sure the pintle hooks are:
Ans: Latched
Q. Coupling and uncoupling methods are the same for more common tractor-trailer combinations, but there are other ways of coupling and uncoupling the many types of truck-trailer combinations that are in use. True or False?
Ans: True
Q. How can you be sure you supplied air to a second trailer?
Ans: Go to the rear of the second trailer and open the emergency line shut-off
Q. What is likely to happen if the pintle hook is unlocked with dolly still under the second trailer?
Ans: The dolly tow bar may fly up
Q. The converter dolly air tank drain valve on coupled and triple trailers should be:
Ans: Closed
Q. The crack-the-whip effect that troubles trucks with trailers is most likely to tip over
Ans: The rear trailer of a triple
Q. You are driving a set of doubles. A set of trailer wheels goes into a skid. Which of these is most likely to occur?
Ans: You will have a trailer jackknife
Q. You are driving a 100-foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least __ seconds of space ahead of you.
Ans: 11
Q. If you want to couple a second trailer to your combination vehicle, secure it by using
Ans: Either of the above, if available
Q. When driving with more than one trailer, which trailer should be the first one behind the tractor?
Ans: The heaviest trailer
Q. Which of these statements about quick steering movements and doubles/triples is true?
Ans: Doubles/triples flip over from quick steering movements more easily than do many other vehicles
Q. You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking, you should
Ans: Use controlled or stab braking
Q. You are driving a 100-foot truck with double trailers at 30 mph. The road is dry. Visibility is good. You should keep at least __ seconds of space ahead of you.
Ans: 10
Q. Converter dollies
Ans: Often do not have spring brakes
Q. Which of these statements about handling doubles and triples is true?
Ans: A sudden movement with the steering wheel can result in a tipped-over rear trailer
Q. You are visually checking the coupling of a converter dolly to the rear trailer. How much space should there be between the upper and lower fifth wheel?
Ans: There should be none
Q. Driving a truck with double or triple trailers requires a driver to
Ans: Do both of the above
Q. Before you can supply air to the air tanks of a second trailer, you need to
Ans: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer
Q. You are doing a walk-around inspection of a double or triple trailer rig. You should be sure that the converter dolly air tank drain valves are ____ and the pintle hook is __.
Ans: Closed; latched
Q. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right if
Ans: The trailer will be raised slightly when the converter dolly is backed under it
Q. You wish to turn right from one two-lane, two-way street into another. The truck is too long to turn without swinging wide. You should turn as shown in the figure.
Ans: Turn a little over the middle
Q. What is likely to happen if the pintle hook is unlocked while the dolly is still under the second trailer?
Ans: The dolly tow bar may fly up
Q. Which of these statements about managing space to the sides is true?
Ans: You should avoid traveling next to others whenever possible
Q. Some large trucks have convex or “spot” mirrors. Such mirrors
Ans: Make things look smaller and farther away than they really are
Q. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear
Ans: Air escape from the open valve
Q. Empty trucks
Ans: May have poor traction due to bouncing and wheel lockup
Q. Which of these is not a good thing to do when driving on slippery roads?
Ans: Use the engine brake or speed retarder
Q. You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks, you should
Ans: Supply air to the trailer air system with the tractor and then disconnect the emergency line
Q. There are more things to inspect on a combination vehicle than on a single vehicle. True or False?
Ans: True
Q. You are driving a 100-foot truck with double trailers at 30 mph. The road is dry. Visibility is good. You should keep at least _ seconds of space ahead of you
Ans: 10
California CDL Doubles/Triples Test Answers – Model 6 Q&A
Q. Which of these statements about handling doubles and triples is true?
Ans: A sudden movement with the steering wheel can result in a tipped-over rear trailer
Q. The best way to stop all skids is to
Ans: Restore traction to the tires
Q. Which of these statements about emergency steering is true?
Ans: If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best
Q. To check if the converter dolly is securely coupled to the rear trailer you should:
Pull gently against the pin of the second trailer
Q. Which of these will result in the best control on curves?
Ans: Slow to a safe speed before entering, then accelerate slightly through the curve
Q. You must drive through deep or flowing water. You should NOT:
Ans: Drive through quickly
Q. When you turn with the tractor/triple trailer combination the wheels that offtrack (cheat) the most are:
Ans: The wheels of the last trailer
Q. When does the Driver’s Manual say you should disable the steering axle brake?
Ans: Never
Q. The best way to keep brakes from getting too hot while going down long grades is to:
Ans: Go slow and use only light, steady pressure on the brakes
Q. You are driving at night and you must dim your headlights for traffic. Good speed management says you should:
Ans: Slow down
Q. If you want to couple a second trailer to your combination vehicle, secure it by using:
Ans: All of the above if available
Q. The best way to keep brakes from getting too hot while going down long grades is to:
Ans: Go slow and use only light, steady pressure on the brakes
Q. Always couple the lightest trailer behind the tractor and the heaviest trailer to the rear of the combination when pulling two trailers. True or False?
Ans: False
Q. Before you can supply air to the air tanks of a second trailer you need to ….
Ans: open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer, and close the converter dolly air tank drain valve.
Q. When hooking the dolly to the rear trailer, the trailer height…
Ans:
– must be slightly lower than the center of the fifth wheel;
– should allow the trailer to raise slightly when the dolly is pushed under it.
Q. Converter dollies…
Ans: often do not have spring brakes
Q. Double trailers jackknife more easily when loaded. True or False?
Ans: False
Q. If you are in a skid you should….
Ans: take your foot off the brake and restore traction to the tires.
Q. If the dolly has air brakes, they are released by opening the air tank petcock. True or False?
Ans: True
Q. It is a good habit to chock the wheels before coupling a second trailer to your rig? True or False?
Ans: True
Q. While driving in a rainstorm during the day, how much following distance you should maintain from the vehicle ahead of you?
Ans: Allow “much more space” than is needed for ideal driving conditions.
Q. Never unlock the pintle hook with the dolly still under the rear trailer. True or False?
Ans: True
Q. On slippery roads, you must avoid:
Ans:
– braking too hard;
– accelerating too hard;
– following too closely.
Q. The converter dolly should be positioned in front of the second trailer and in line with the kingpin. True or False?
Ans: True
Q. The trailer should be slightly lower than the center of the fifth wheel. True or False?
Ans: True
Q. When coupling a second semi-trailer, the dolly should always be at least one yard away from the nose of the trailer. True or False?
Ans: False
Q. Regardless of the type of skid, to restore vehicle control, you must…
Ans: restore traction to the tires
Q. There should be no space between the upper and lower fifth wheel when properly coupled. True or False?
Ans: True
Q. To set the trailer emergency brakes if the second trailer does not have spring brakes, you should drive the tractor close to the trailer, connect the emergency line and charge the air tank, then disconnect the emergency line. True or False?
Ans: True
Q. Should you do a walk-around inspection when preparing to pull Doubles or Triples? Yes or No?
Ans: Yes
Q. To connect the converter dolly to the front trailer, you should lock the pintle hook and secure the converter gear support in the raised position. True or False
Ans: True
California CDL Doubles/Triples Test Answers – Model 7 Q&A
Q. What is the best way to keep your brakes from overheating when going down a long grade?
Ans: Get in proper gear, use the braking effects of engine and apply brakes firmly when “safe” speed is reached.
Q. Unlocking the pintle hook with the dolly still under the rear trailer….
Ans: could cause the dolly tow bar to fly up, possibly causing injury.
Q. What is the procedure to make sure that you supplied air to the rear trailer?
Ans: Open the emergency line shut-off on the rear trailer.
Q. When pulling more than one trailer, which of the following is correct?
Ans: The heaviest trailer must always be in the first position behind the tractor.
Q. When pulling doubles and triples you should always look at least 12-15 seconds ahead. At highway speed this will be…
Ans: about 1/4 mile.
Q. When making a lane change, when should you check your mirrors?
Ans: After completing the lane change
Q. When performing a vehicle inspection in a two-trailer rig, the shut-off valves at the rear of the front trailers should be open? True or False?
Ans: True
Q. When the full weight of a trailer is resting on the tractor, you should hit the landing gear at approximately a 30 degree angle? True or False
Ans: False
Q. When inspecting double trailers, the shut-off valves at the rear of the last trailer should be open? True or False?
Ans: False
Q. When pulling double trailers, you should brake firmly while going through a curve. True or False?
Ans: False
Q. Empty trucks may have poorer traction due to bouncing and wheel lockup. True or False?
Ans: True
Q. A sudden steering movement may result in the rear trailer rolling over. True or False?
Ans: True
Q. At highway speeds, you should look at least ahead of your truck?
Ans: 1/4 mile
Q. Good drivers shift their attention….
Ans: back and forth, near and far.
Q. Many drivers do not look far enough ahead when driving, true or false?
Ans: True
Q. While driving a double, you must make a quick stop in order to avoid a crash. You should…
Ans: use controlled or stab braking.
Q. With the hand valve applied, you test trailer brakes by opening the service line valve at the rear of the last trailer. You should….
Ans: hear air escaping from the open valve.
Q. You should check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is right when…
Ans: the trailer will be raised slightly when the converter dolly is backed under it.
Q. You should check for air at the rear of the second trailer by opening the emergency line, true or false?
Ans: True
Q. You should release the dolly brakes before disconnecting the dolly air and electric lines when uncoupling the rear trailer, true or false?
Ans: False
Q. You are driving a 62-foot-long double-trailer combination at 35 mph. The pavement is dry and visibility is excellent. How much following distance in seconds should you maintain at all times?
Ans: 6 seconds
Q. You should use the trailer brakes to stop a skid, true or false?
Ans: False
Q. What three methods can you use to secure a second trailer before coupling?
Ans:
– Release the dolly brake by opening the air tank petcock or if the dolly has a spring brake, use the dolly parking brake control;
– Wheel the dolly into position by hand so it is in line with the kingpin;
– Use the tractor and first semi-trailer to pick up the converter dolly and move it into position.
Q. You should pull the tractor forward gently while the trailer brakes are still locked to check that the trailer is locked into the tractor, true or false?
Ans: True
Q. You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?
Ans: None
Q. You are driving a triple rig. Which trailer is most likely to turn over in an emergency maneuver?
Ans: Rear trailer
Q. You are doing a walkaround inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are closed and the pintle hook is latched. True or false?
Ans: True
Q. You are driving a 90 ft. long double-trailer combination at 45 mph. The pavement is dry and visibility is excellent. How much following distance in seconds should you maintain?
Ans: 10 seconds
Q. You should release the pintle hook on the first semi-trailer before pulling clear of the converter dolly, true or false?
Ans: True
Q. “Spot,” convex or “bug-eye” mirrors
Ans: make objects appear smaller and farther away than they really are.
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About California CDL Doubles/Triples Test
If you’re looking to get your commercial driver’s license in California, you’ll need to pass the doubles/triples test. This test is designed to ensure that you’re familiar with the rules and regulations for operating a vehicle with two or more trailers attached. Here’s what you need to know about taking the California CDL doubles/triples test.
The doubles/triples test is one of four exams you’ll need to take in order to obtain your CDL. The other three exams are the general knowledge test, the air brakes test, and the combination vehicles test. You must pass all four tests in order to be eligible for a California CDL.
The doubles/triples test is a written exam that consists of 25 questions. You’ll need to answer 20 of the questions correctly in order to pass. The test covers topics such as coupling and uncoupling trailers, inspecting your vehicle, and maneuvering in tight spaces.
If you’re taking the test at a DMV office, you’ll be given two chances to pass. If you don’t pass on your first attempt, you can take the test again after 14 days. If you fail the second time, you’ll need to wait 30 days before you can take the test again.
If you’re taking the test online, you’ll usually only be given one chance to pass. However, some websites do offer a money-back guarantee if you don’t pass.
You can take the doubles/triples test at any California DMV office. You’ll need to bring a completed application for a commercial driver’s license, as well as the appropriate fees. You can find a list of DMV offices that offer the test on the California DMV website.
You can visit the official government site here for more details: https://www.dmv.ca.gov/portal/handbook/commercial-driver-handbook/section-7-doubles-and-triples/
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