a) It is the space between the rear wheels
b) It is an adjusting nut on the backside of the brake drum, used for adjusting the brakes
c) It is an adjusting nut under the cab to adjust the springs
Answer: b) It is an adjusting nut on the backside of the brake drum, used for adjusting the brakes
a) As little as possible
b) Whenever you leave the vehicle unattended
c) Only during pre-trip and post-trip inspections
Answer: b) Whenever you leave the vehicle unattended
a) You could lose air pressure, but you would know about it anyway
b) This could cause sudden emergency braking in a single-circuit air system
c) Neither of the above
Answer: b) This could cause sudden emergency braking in a single-circuit air system
a) ½ inch
b) ¼ inch
c) 1 inch
Answer: c) 1 inch
a) Air pressure is reduced to the brake pads
b) Compressed air is let out of the system
c) Air pressure is applied to the brake pads
Answer: c) Air pressure is applied to the brake pads
a) Brake hard until the wheels lock and then get off the brakes for as long as the wheels were locked
b) Press on the brake pedal as hard as you can, release the brakes when the wheels lock, and apply the brakes again when the wheels start to roll
c) Pump the brake pedal
Answer: b) Press on the brake pedal as hard as you can, release the brakes when the wheels lock, and apply the brakes again when the wheels start to roll
a) After every four hours of service
b) Once a week
c) After every working day
Answer: c) After every working day
a) 150
b) 50
c) 100
Answer: a) 150
a) None
b) All weather conditions
c) Only wet or icy conditions
d) Only good weather
Answer: b) All weather conditions
a) 250 psi
b) 150 psi
c) 200 psi
d) 100 psi
Answer: b) 150 psi
a) They work as the main braking mechanism
b) They work as the main braking mechanism, with the engine braking effect as an emergency backup
c) Not applicable; no braking effect is involved in a downgrade
d) They work as a supplement to the braking effect of your engine
Answer: d) They work as a supplement to the braking effect of your engine
a) 5 psi for single vehicles and 10 psi for combination vehicles
b) 3 psi for single vehicles and 4 psi for combination vehicles
c) 1 psi for singe vehicles and 3 psi for combination vehicles
d) 5 psi for single vehicles and 6 psi for combination vehicles
Answer: b) 3 psi for single vehicles and 4 psi for combination vehicles
a) To tell you how hot the air in the tank is
b) To tell you how much air is in the tank
c) To warn you if there is too little air in the tank
d) To do all of the above
Answer: b) To tell you how much air is in the tank
a) Brakes being out of adjustment
b) Not relying on engine braking enough
c) Excessive use of the service brakes
d) All of the above
Answer: d) All of the above
a) You will have to brake function, and the truck will be out of control
b) You will still have normal brake function and will just need to get the ABS repaired soon
c) It may cause problems with other mechanical systems and possibly pose a huge fire risk
d) It will slow your truck to a halt and force you to pull over
Answer: b) You will still have normal brake function and will just need to get the ABS repaired soon
a) Brakes that come on automatically on a truck on tractor when the psi drops too low
b) Make up of powerful springs that are help back by air pressure while your are driving
c) Not going to take full effect until your psi drops to a certain range, often 20 to 30 psi
d) All of the above
Answer: d) All of the above
a) Only those built after 2005
b) Only those built after 2010
c) None
d) All vehicles with air brakes currently in operation
Answer: d) All vehicles with air brakes currently in operation
a) Otherwise, you will have to get a CDL with restrictions
b) Otherwise, you cannot get a CDL at all
c) All trucks have air brakes in California
d) Otherwise, you can only get a CDL permit
Answer: a) Otherwise, you will have to get a CDL with restrictions
a) Every time you leave your vehicle, with rare exceptions
b) Every time you leave your vehicle for any period of time
c) Only if you are away from your vehicle for an extended period of time
d) Only in urban areas where there are many other vehicles
Answer: a) Every time you leave your vehicle, with rare exceptions
a) Put on the parking brakes
b) Chock the wheels
c) Remove the keys
d) Do all of the above
Answer: d) Do all of the above
a) Increases your normal braking capability
b) Decreases your normal braking capability
c) Shortens your stopping distance
d) Activates when the wheels are about to lock up
Answer: d) Activates when the wheels are about to lock up
a) One system is called the "primary" system and the other one is called the "secondary" system
b) Usually, one system operates the front axle and the other system operates the rear axle
c) It uses a single set of brake controls
d) All of the above are true
Answer: d) All of the above are true
a) The vehicle was manufactured after 2000
b) ABS is still optional
c) The vehicle was manufactured after 1998
d) The vehicle was manufactured after 2010
Answer: c) The vehicle was manufactured after 1998
a) At the end of a trip
b) At the end of each working day
c) At the end of the fiscal quarter
d) At the end of the month
Answer: b) At the end of each working day
a) Part of your air brake system used to adjust the brakes
b) Between the push rod and S-cam on drum brakes
c) Between the power screw and push rod on disc brakes
d) All of the above
Answer: d) All of the above
a) Brake drum
b) Safety valve
c) Axle
d) Slack adjuster
Answer: b) Safety valve
a) Use gloves and pull hard on each slack adjuster you can reach
b) Accelerate and then brake hard
c) Press the brake pedal while listening for any strange noises
d) All of the above are correct
Answer: a) Use gloves and pull hard on each slack adjuster you can reach
a) You should drive more quickly so that you will be able to keep the trailer and tractor straight.
b) You should use only the braking necessary to stay safely in control
c) Brake the same way no matter what you're driving: a vehicle with ABS, a vehicle with a trailer, or something else
d) When you slow down, you should monitor your tractor and trailer and ease off the brakes to keep control
Answer: a) You should drive more quickly so that you will be able to keep the trailer and tractor straight.
a) Parking brake system
b) Service brake system
c) Radio signal system
d) Emergency brake system
Answer: c) Radio signal system
a) 25
b) 30
c) 35
Answer: c) 35
a) Spring
b) Fluid
c) Air
Answer: c) Air
a) Closes if you apply the parking brakes
b) Provides the air supply for the brake system
c) Will close itself automatically if the air supply drops to a certain level
d) Does all of the above
Answer: d) Does all of the above
a) Pump the brakes while your vehicle is fully on
b) With the engine off, step on and off the brake pedal to lower the air pressure below 60 psi
c) Manually let the air out of your brakes and see if the signal comes on
d) Pump the brakes until the air pressure drops below 30 psi
Answer: b) With the engine off, step on and off the brake pedal to lower the air pressure below 60 psi
a) Signal just as you begin to change lanes, and drift over slowly
b) Signal early, and change lanes slowly and smoothly
c) Signal before you change lanes, and then move over quickly
Answer: b) Signal early, and change lanes slowly and smoothly
a) Call or radio for help
b) Try to use ur parking brake to stop
c) Get off the road as soon as possible
Answer: c) Get off the road as soon as possible
a) A four-inch, circular, red hazardous materials label must be on the container
b) Gas cylinders that will not hold a label must be shipped under the cover
c) A four-inch, diamond shaped hazardous materials label must be on the container
Answer: c) A four-inch, diamond shaped hazardous materials label must be on the container
a) Allow enough space to get completely across the intersection
b) Back up to allow oncoming traffic to pass
c) Complete your turn without stopping
Answer: a) Allow enough space to get completely across the intersection
a) Lightly tap your horn, if needed
b) At night, turn on your high beams while you pass the vehicle
c) Assume the other driver does not see you
Answer: b) At night, turn on your high beams while you pass the vehicle
a) Slow moving vehicle
b) Hazardous materials on board
c) Student driver
Answer: a) Slow moving vehicle
a) Tire changing equipment
b) Red reflective triangles
c) Charged fire extinguisher
Answer: a) Tire changing equipment
a) Tires of mismatched sizes should not be used on the same vehicle
b) Radial and bias -play tires can be used together on the same tire
c) 2/32" tread depth is safe for front tires
Answer: a) Tires of mismatched sizes should not be used on the same vehicle
a) You can pull forward when you leave
b) There is at least one curb next to your vehicle
c) Your vehicle is protected by trees or some other overhang
Answer: a) You can pull forward when you leave
a) Two
b) Three
c) Four
Answer: c) Four
a) Above, lower
b) Below, higher
c) Near, lower
Answer: c) near, lower
a) Just one missing leaf spring is not dangerous
b) Cracked spring hangers that are still tight are not dangerous
c) Brake shoes should not have oil, grease, or brake fluid on it
Answer: c) Brake shoes should not have oil, grease, or brake fluid on it
a) Turning on your headlights during the day when visibility is reduced
b) Flashing your break lights to warn someone before you are slowing down
c) Flashing your brake lights to stop someone tailgating
Answer: c) Flashing your brake lights to stop someone tailgating
a) Electric
b) Hydraulic
c) Robotic
Answer: c) Robotic
a) A loud hissing noise
b) Gentle thumping
c) Wheels fishtailing
Answer: c) Wheels fishtailing
a) Offensive
b) Defensive
c) Objective
Answer: b) Defensive
a) 25 MPH
b) 45 MPH
c) 35 MPH
Answer: c) 35 MPH
a) Brakes absorb more heat to stop heavier or faster moving vehicles
b) Brake drums cool very quickly when the vehicle is moving very fast
c) Brake fade is not caused by heat
Answer: a) Brakes absorb more heat to stop heavier or faster moving vehicles
a) Do nothing because the posted speed limit for the offramp is usually 10 MPH below the safe speed limit for the offramp
b) Slow to a safe speed before the curve
c) Downshift after you are in the curve
Answer: b) Slow to a safe speed before the curve
a) Push down on the brake pedal as hard as you can
b) Pump the brake pedal to generate pressure
c) Put the vehicle in neutral and set the parking brake
Answer: b) Pump the brake pedal to generate pressure
a) Locked wheels usually have more traction that rolling wheels
b) Front wheels slide sideways to try to "catch up" with rear wheels
c) Trailers can push the towing vehicle sideways
Answer: c) Trailers can push the towing vehicles sideways
a) Unstable loads (i.e. hanging meat, livestock) require extra caution on curves
b) Oversize loads can be transported without special permits when roadways are not busy
c) Tank vehicles used to transport liquids should always be fully loaded
Answer: a) Unstable loads (i.e. hanging meat, livestock) require extra caution on curves
a) Gross vehicle weight
b) Gross combination weight
c) Gross axle weight
Answer: b) Gross combination weight
a) Whether all vehicle lights are working and are clean
b) Cargo securement
c) Amount of fuel in vehicle
Answer: c) Amount of fuel in vehicle
a) 3 seconds
b) 4 seconds
c) 5 seconds
Answer: b) 4 seconds
a) Paving the road does not affect the clearance height under bridges or overpasses
b) The weight of cargo can change the height of your vehicle
c) Warnings are always posted for low clearance areas like bridges and overpasses
Answer: b) The weight of cargo can change the weight of your vehicle
a) Sidetracking
b) Offtracking
c) Fishtailing
Answer: b) Offtracking
a) 10 feet, 100 feet, 200 feet toward approaching traffic
b) 25 feet, 100 feet, 250 feet toward approaching traffic
c) 50 feet, 100 feet, 300 feet toward approaching traffic
Answer: a) 10 feet, 100 feet, 200 feet toward approaching traffic
a) Electrical
b) Gasoline
c) Neither of the above
Answer: c) Neither of the above
a) At least once a week
b) If any problems occurred the last time the vehicle was operated
c) Before operating the vehicle
Answer: c) Before operating the vehicle
a) Attention distance, Reaction distance, slowing distance
b) Observation distance, response distance, braking distance
c) Perception distance, reaction distance, braking distance
Answer: c) Perception distance, reaction distance, breaking distance
a) Make sure you are driving slow enough so you can stop within the range of your headlights in an emergency
b) Roll down your windows so that the fresh air will help keep you awake
c) If you are sleepy, drink coffee or other caffeine products
Answer: a) Make sure you are driving slow enough so you can stop within the range of your headlights in an emergency
a) Year
b) Two Years
c) Four years
Answer: b) Two Years
a) 20 feet
b) 50 feet
c) 70 feet
Answer: b) 50 feet
a) Small arms ammunition labeled ORM-D
b) Irritating materials or tear gas
c) Hospital drugs
Answer: b) Irritating materials or tear gas
a) 100
b) 250
c) 500
Answer: c) 500
a) Must always be completely closed and locked while the bus is moving
b) May be locked in a partially open position for fresh air
c) May be left in a closed but unlocked position
Answer: b) May be locked in a partially open position for fresh air
a) 100
b) 250
c) 500
Answer: a) 100
a) 3-6
b) 7-10
c) 12-15
Answer: c) 12-15
a) 8
b) 4
c) 3
Answer: b) 4
a) Is required when carrying less than 15 riders
b) Indicates where you should stand when talking to passengers
c) Is the line that all riders must stay behind while the bus is moving
Answer: c) Is the line that all riders must stay behind while the bus is moving
a) All baggage has been loaded
b) All scheduled passengers have arrived at the station
c) Departure time
Answer: c) Departure time
a) Only as the outside on a set of duals
b) On any or all of the wheels
c) Anywhere except the front wheels
Answer: c) Anywhere except the front wheels
a) Immediately after starting a lane change
b) As you prepare to stop
c) Regularly as part of your scan for potential hazards
Answer: c) Regularly as part of your scan for potential hazards
a) Be closed when operating the bus
b) Always have a red door light and it must be lighted
c) Sound an alarm when opened
Answer: a) Be closed when operating the bus
a) Slow to a safe speed before entering a curve, then accelerate slightly through it
b) Maintain constant speed through a curve, allowing the bus to lean slightly
c) Slow to a safe speed before entering a curve, then coast through it
Answer: a) Slow to a safe speed before entering a curve, then accelerate slightly through it
a) In a compartment away from passengers
b) In front of the standee line
c) So any door or window can be used in an emergency
Answer: c) So any door or window can be used in an emergency
a) The distance is less than 1 mile
b) A peace officer or rescue crew is present
c) Getting off the bus sooner would be unsafe
Answer: c) Getting off the bus sooner would be unsafe
a) Always wait for a large enough gap before merging
b) Pull out slowly and gradually reach the speed of traffic
c) Drive on the shoulder of the road until you reach the speed of traffic
Answer: a) Always wait for a large enough gap before merging
a) 5
b) 50
c) 500
Answer: c) 500
a) Drop 5 MPH until your eyes adjust
b) Nothing. How well you can see should not affect speed
c) Slow down
Answer: c) Slow down
a) Not allow the rider to get on
b) Tell the rider to sit in the rear of the bus
c) Put the battery or gasoline in the cargo department
Answer: a) Not allow the rider to get on
a) Near a police station
b) That is as safe as possible
c) Convenient for you
Answer: b) That is as safe as possible
a) You should keep your bus to the right side of your lane
b) You should avoid traveling next to others when possible
c) You should keep your bus to the left side of your lane
Answer: b) You should avoid traveling next to others when possible
a) Another driver only
b) A condition of the roadway or weather only
c) Any condition which may cause your trip to be unsafe
Answer: c) Any condition which may cause your trip to be unsafe
a) Without a fire extinguisher beside you
b) In a closed building
c) With any of the windows open
Answer: b) In a closed building
a) During your first en route inspection
b) Immediately after stopping
c) Before driving
Answer: c) Before driving
a) 25
b) 30
c) 35
Answer: c) 35
a) Air pressure
b) A modulating control valve
c) Mechanical force
Answer: c) Mechanical force
a) You apply the brakes as hard as you can without locking the wheels
b) You brake as hard as you can, release the brakes when the wheels lock, and reapply the brakes when the wheels start rolling
c) Apply the hand valve for one second, then push the brake pedal hard
Answer: a) You apply the brakes as hard as you can without locking the wheels
a) 12
b) 32
c) 52
Answer: b) 32
a) Bolts
b) Spring pressure
c) Air pressure
Answer: c) Air pressure
a) 50
b) 100
c) 150
Answer: c) 150
a) 30 seconds
b) 45 seconds
c) 60 seconds
Answer: b) 45 seconds
a) Use of the spring brakes
b) Use of the front brake limiting valve
c) Braking effect of the engine
Answer: c) Braking effect of the engine
a) Brake drum or disc
b) Slack adjuster
c) S-cam
Answer: a) Brake drum or disc
a) Press hard on the brake pedal and apply full hand valve until you stop
b) Use light steady pressure on the brake pedal
c) Brake hard, release the brakes when the wheels lock, and reapply the brakes when the wheels start rolling
Answer: c) Brake hard, release the brakes when the wheels lock, and reapply the brakes when the wheels start rolling
a) Have in the air tanks
b) Have in the modulating control valve
c) Are applying to the brakes
Answer: c) Are applying to the brakes
a) Upshift and drive to a safe place
b) Downshift and drive to a safe place
c) Stop and safely park as soon as possible
Answer: b) Stop and safely park as soon as possible
a) Rid the wet tank of alcohol that condenses and sits at the bottom
b) Eliminate the need for daily tank draining
c) Reduce the risk of ice in air brake valves in cold weather
Answer: c) Reduce the risk of ice in air brake valves in cold weather
a) Less than 100 feet
b) 100-300 feet
c) More than 300 feet
Answer: c) More than 300 feet
a) Brake lag
b) Reaction
c) Effective braking
Answer: a) Brake lag
a) Improper adjustment of the S-cam
b) Increased contact between the brake drums and brake linings
c) Expansion of the brake drums
Answer: c) Expansion of the brake drums
Answer: A lower gear than you would use to climb the hill
A. Only park on level ground.
B. Leave the tractor hooked to the trailer.
C. Use chock blocks.
Answer: C. Use chock blocks.
A. Blue & Green
B. Red & Black
C. Blue & Red
Answer: C. Blue & Red
A. As long as the tractor remains in low gear you don't need to apply the brakes.
B. Leave the tractor in gear and apply the spring brakes.
C. Engage the parking brakes with the transmission in neutral.
Answer: C. Engage the parking brakes with the transmission in neutral.
A. Trailer height.
B. Ground support and damage.
C. Gravel on the dolly pads.
Answer: B. Ground support and damage.
A. Pull tractor completely clear of the trailer.
B. Pull the tractor forward, but leave the tractor frame under the trailer.
C. Pull the tractor forward until back tires are even with the front of the trailer.
Answer: B. Pull the tractor forward, but leave the tractor frame under the trailer.
A. Dolly the legs down until they make firm contact with the ground.
B. Crank the landing gear until the sand pads are about ¼ "from the ground.
C. After lower landing gear makes firm contact, turn the crank in low gear a few extra turns.
Answer: C. After lower landing gear makes firm contact, turn the crank in low gear a few extra turns.
A. Pull forward gently and set your tractor parking brakes.
B. Raise the trailer slightly to remove the pressure.
C. Gently back up the tractor and lock your tractor brakes.
Answer: C. Gently back up the tractor and lock your tractor brakes.
A. Apply the brakes while turning.
B. Steer with one hand on the wheel and one hand on the air horn.
C. Don't turn any more than needed to clear what is in your way.
Answer: C. Don't turn any more than needed to clear what is in your way.
A. The one behind them.
B. The one to the right of them
C. The one in front of them.
Answer: C. The one in front of them.
A. Helpers should be out of the driver's sight and use spoken signals to help the driver.
B. It is safer to back toward the right of the vehicle than toward the driver's side.
C. You should avoid backing whenever possible.
Answer: C. You should avoid backing whenever possible.
A. When the trailer landing gear is fully extended.
B. When the trailer will be lifted slightly when the tractor connects.
C. When the kingpin is about an inch above the fifth wheel.
Answer: B. When the trailer will be lifted slightly when the tractor connects.
A. To service the air control supply.
B. To service the tractor air brakes.
C. To carry air to the trailer service brakes.
Answer: C. To carry air to the trailer service brakes.
A. Driver failing to keep the truck on route or track.
B. The process of taking the tracks of a tractor.
C. When the rear wheels follow a different path than the front wheels.
Answer: C. When the rear wheels follow a different path than the front wheels.
A. As a parking brake.
B. Only with the foot brake.
C. To test the trailer brakes.
Answer: C. To test the trailer brakes.
A. 45 degrees
B. 60 degrees
C. 90 degrees
Answer: C. 90 degrees
A. About 1 inch
B. No more than ½ inch
C. None
Answer: C. None
A. The tractor to lose all air pressure.
B. The tractor brakes to keep working properly.
C. The tractor brakes to lock up.
Answer: B. The tractor brakes to keep working properly.
A. Kingpin is about 2 ¼ inches above the fifth wheel.
B. Beginning of the kingpin is even with the top of the lower fifth wheel plate.
C. The coupling device of the trailer is just below the middle of the tractor fifth wheel.
Answer: C. The coupling device of the trailer is just below the middle of the tractor fifth wheel.
A. Driving away at 20 mph and pulling down the trailer hand valve.
B. Backing up with the trailer brakes released.
C. Pulling the tractor ahead gently with the trailer brakes locked.
Answer: C. Pulling the tractor ahead gently with the trailer brakes locked.
A. The emergency tractor brakes will come on.
B. The emergency trailer brakes will come on.
C. Nothing is likely to happen until you try your brakes.
Answer: C. Nothing is likely to happen until you try your brakes.
A. It results in less skidding than using the brake pedal alone.
B. It is the best way to brake in a straight line.
C. It should never be done.
Answer: C. It should never be done.
A. Usually do not have spring brakes.
B. Usually need a glad hand converter.
C. Cannot be operated on interstate highways
Answer: A. Usually do not have spring brakes.
A. Raised ½ way with the crank handle secured.
B. Raised ¾ way with the crank handle secured.
C. Fully raised with the crank handle in its bracket (cradle).
Answer: C. Fully raised with the crank handle in its bracket (cradle).
A. The trailer will not swing on the fifth wheel.
B. The hand valve is released and you may drive away.
C. The coupling is not correct and should be corrected before driving the coupled unit.
Answer: C. The coupling is not correct and should be corrected before driving the coupled unit.
A. 1
B. 2
C. 4
Answer: C. 4
A. Make sure the brakes are properly adjusted.
B. Keep both hands firmly on the steering wheel.
C. Reduce speed before entering turns.
Answer: C. Reduce speed before entering turns.
A. Charging
B. At normal pressure
C. Between 50 and 60 psi
Answer: B. At normal pressure
A. Hook up the electrical service cable.
B. Hook up the emergency and service air lines.
C. Nothing, back under the trailer and secure the fifth wheel.
Answer: B. Hook up the emergency and service air lines.
A. Over the locking lever.
B. Straight up.
C. Through the locking lever.
Answer: A. Over the locking lever.
A. There is enough clearance between the upper and lower fifth wheel plates.
B. The safety latch is in the unlocked position.
C. There is enough clearance between the tractor frame and the landing gear.
Answer: C. There is enough clearance between the tractor frame and the landing gear.
A. Pushing in the trailer air supply valve.
B. Pulling out the trailer air supply valve.
C. Connecting the service line glad hand.
Answer: A. Pushing in the trailer air supply valve.
A. The hand valve will apply the tractor brakes instead of the trailer brakes.
B. If the trailer has no spring brakes, you could drive away, but wouldn't have trailer brakes.
C. The brake pedal will work the trailer spring brakes instead of the air brakes
Answer: B. If the trailer has no spring brakes, you could drive away, but wouldn't have trailer brakes.
A. To park at loading docks.
B. To park on a grade.
C. Never.
Answer: C. Never.
A. Open
B. Neutral
C. Closed
Answer: A. Open
A. The connected brake circuit becomes a backup air tank.
B. It will keep dirt and water out of the lines.
C. If you don't, you could never build air pressure.
Answer: B. It will keep dirt and water out of the lines.
A. Hear the tires skidding.
B. See it in your mirrors.
C. Feel the "pulling" in the cab.
Answer: B. See it in your mirrors.
A. The kingpin to engage the driver's side locking jaw first.
B. Directly in front of the trailer.
C. The left outer dual wheel with the kingpin.
Answer: B. Directly in front of the trailer.
A. The relay valves to close.
B. An increase in air pressure to the service line.
C. The trailer's emergency brakes to come on.
Answer: C. The trailer's emergency brakes to come on.
A. Check the air line connections.
B. Cross the air lines.
C. Check the electrical service cable.
Answer: A. Check the air line connections.
A. Loaded to full capacity.
B. Overloaded.
C. Empty
Answer: C. Empty
A. Fully raised.
B. Slightly raised.
C. Fully lowered.
Answer: B. Slightly raised.
A. The shank.
B. The head.
C. The base.
Answer: A. The shank.
A. Level with the ground.
B. Tilted up towards the end of the tractor.
C. Tilted down toward the end of the tractor.
Answer: C. Tilted down toward the end of the tractor.
A. 100 and 125.
B. 60 and 85.
C. 20 and 45.
Answer: C. 20 and 45.
