Here are some possible questins you might encounter while trying to apply for your CDL Permitt. There will be 70 General Knowledge, 15 Air Brakes and 15 Combination.
To correct a drive-wheel braking skid you should?
When transporting cargo, inspect the materials and securing devices?
Before the trip, within 25 miles after beginning the trip, after every 3 hours or 150 miles, and during every driving break.
To prevent truck fires, you should inspect you vehicle and its gauges?
Before and during the trip
In the event of an engine fire?
Try to keep the hood closed and shoot extingishers through louvers or from the underside of the vehicle.
Shippers must write the name of the hazard class of hazardous products?
On the shipping papers and on the diamond-shaped labels or special tags on the container.
Why is it important to check and cover your cargo?
1) You need to protect people from spilled cargo. 2) You should look at your cargo in the mirrors often while driving. 3) You need to protect the cargo from the weather.
For electrical fires and burning liquids, use?
an A:B:C or B:C type extinguisher.
You must keep shipping papers for hazardous materials?
In a pouch on the driver's door.
Which of the following contains more alcohol? 1. A 12 ounce mug of 5% beer, 2. A 5 ounce glass of 12% wine or 3. A 1 1/2 ounce shot of 80 proof liquor?
All three contain the same amount of alcohol.
What is the total stopping distance when driving a heavy vehicle on dry pavement at 55 MPH?
A broken coolant hose while driving?
Can cause a fire.
When backing a trailer,
Turn the steering wheel in the opposite direction you want to go.
Controlled braking is?
Empty trucks are?
Are easier to steer.
What is true about clearing a overhead clearance?
An empty van is higher than a loaded van.
Why don't new trucks use the same gear for going down a hill as they would for going up a hill?
They have low friction parts.
You are driving on a highway and your front tire has just blown out. You should?
Stay off the brake until you have slowed down.
What is Black Ice?
How do you start your vehicle on an uphill grade?
Use the parking brake to keep the vehicle from rolling backwards and then engage the clutch.
1. Occurs when water or slush forms a film between the tires and the road. 2. Can Occur at any speed. 3. Is more likely to occur when tire pressure is low.
At night you should always:
Make sure that your stopping distance is within your sight distance.
What can cause you to skid?
While driving, you should look ahead:
12 to 15 seconds.
What should you do when using your turn signal?
When turning, signal early.
Avoid using your horn because:
It may startle other drivers.
Use your horn only if?
To let others know you are there and to help prevent a crash.
Why should you cover the cargo?
To protect the cargo and keep it from spilling.
Whenever you are being tailgated, you should:
Increase the space in front of you.
What is the meaning of the red triangles with an orange center on the back of a vehicle?
The vehicle is slow moving.
What is controlled braking?
Keeping the vehicle in a straight line when braking.
If your hydraulic brakes go out, what should you do?
1. Try pumping the brakes to generate pressure. 2. Downshift 3. Use the parking brake
Signs of tire failure would be:
1. A loud bang 2. Heavy Steering 3. Vibration
Which of the following is true about double-clutching and shifting?
Use your tachometer and road speed to tell you when to shift.
What is important about downshifting?
Remember to Downshift before you enter a curve.
Use the B:C fire extinguishers on:
1. Cloth fires 2. Wood and Paper fires 3. Burning liquids and Electrical fires
You can use water on what type of fire:
Use the A:B:C fire extinguisher on:
1.Burning liquids and Electrical fires 2.Cloth fires 3.Wood and Paper fires
What three kinds of emergency equipment must you have?
1. 3 Red Reflective Triangles 2. Spare Electrical Fuses 3. Properly Charged and Rated Fire Extinguisher
"Optional" emergency equipment would consist of?
1. Chains 2. Tire changing equipment 3. List of emergency phone numbers 4. Accident reporting kit 5. Perform Brake checks during the in-cab inspection
What should wheel bearing seals be checked for?
1. Missing Spacers, Studs, Lugs, and Clamps 2. Damaged or Mismatched Lock Rings 3. Welding on rims (Note as a defect) 4. Rust and loose nuts 5. Out-of-round stud or bolt holes on rims indicate problems. 6. Check the hub oil supply- no leakage
What's the most important hand signal that you and the "HELPER" should agree on?
What are the two ways to know when to shift?
1. Use Engine Speed (RPM) 2. Use Road Speed (MPH)
What is your most important way to see the sides and rear of your vehicle?
Regular Checks, check your mirrors to be aware of traffic about every 7-15 seconds.
What three things add up to total stopping distance?
Percption Distance plus Reaction Distance plus Braking Distance = Total Stopping Distance
Perception Distance is?
The distance your vehicle travels from the time your eyes see a hazard until your brain Recognizes it.
Reaction Distance is?
The distance traveled from the time your brain tells your foot to move from the accelerator until your foot is actually pushing the brake pedal.
Braking Distance is?
The distance it takes to stop once the brakes are put on.
What is (GVWR)?
Any motor vehicle with a Gross Vehicle Weight Rating of 26,000 pounds or more(GVWR)
What is (GCWR)?
Any combination of vehicles with a Gross Combination Weight Rating of 26,001 pounds(GCWR) or more provided the Gross Vehicle Weight Rating (GVWR) of the vehicles being "towed" is in excess of 10,000 pounds.
What are "RETARDERS" used for?
They help slow a vehicle, reducing the need for using your brakes, they also reduce brake wear and give you anothor way to slow down.
What are 4 basic types of Retarders?
1. Exhaust 2. Engine 3. Hydraulic 4. Electric All Retarders can be turned on or off by the driver.
When should you turn off your Retarders?
Whenever the road is Wet, Icy or Snow Covered.
Aggresive driving is when?
The operator is operating their vehicle in a selfish, bold, or pushy manner, without regard for the rights or safety of others.
What is operating a motor vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle?
What is (BAC)?
Blood Alcohol Concentration
What can cause you to lose your CDL for at least One Year for a "FIRST OFFENSE"
1. Driving a CMV if your blood alcohol concentration is .04% or higher. 2. Driving a CMV under the influence of "Alcohol" 3. Refusing to undergo blood alcohol testing 4. Driving a CMV while under the influence of a controlled substance. 5. Leaving the scene of an accident involving a CMV 6. Committing a felony involving the use of a CMV.
When parked on the side of the road remember to?
Turn on your four-way emergency flashers, as caution do not trust your "Tail Lights" to give warning.
What can cause your Brakes to apply unevenly,not grab properly and make them weak?
Driving in Heavy Rain or Deep Standing Water. "Water in the Brakes"
While driving what is the best method to overcome "FATGUE and Lack of Alertness"
During a Pre-Trip inspection, check your brakes and suspension system for:
1. Brake shoes and pads with fluid in them. 2. Shoes worn thinner than 1/4 inch 3. Cracked, missing, or broken parts.
In a Pre-Trip inspection what should your tires look like?
Tires should not be mismatched in "Size" and "Ply", nor worn or damaged. Front tires: 4/32 Others tires: 2/32
Too much weight on the Steering Axle can cause?
What is Top Heavy?
A high center of gravity means you are more likely to tip over, cargo piled up high or Heavy cargo on top.
What is the ratio for a tie-down on a cargo?
A cargo should have at least ONE tie down for each TEN feet of cargo.
You are stopped on the shoulder of a curve that prevents approaching traffic from seeing your vehicle. How far back should you place your last warning device?
The proper distance to use high beams is at least what feet away from an approaching vehicle?
What is the correct placement of warning devices when parked on the shoulder of a one-way or divided highway?
At 10 feet, 100 feet, and 200 feet from the rear of the vehicle
At speeds below 40 mph, you need at least how many seconds for how many feet of vehicle length?
One Second for 10 feet.
You are driving a 60-foot rig at 55 mph. How many seconds of space should you have between you and the vehicle ahead?
If you are on the right shoulder going 55 miles per hour, what is the safest way to get onto the road?
Stay on the shoulder if it is clear and come to a stop, then return to the road when it's safe.
Air Tanks should be drained:
On pre-trip and post-trip inspections
On a long downhill grade, it is recommended that you:
Gear down and keep your speed 5 mph below the "safe speed"
The service brake system:
Applies and releases the brakes when you apply and release pressure on the service brake.
When air pressure in the tanks falls below a certain level, the cut in:
Turns on the air compressor.
True or False. Disc Brakes are the most widely used brakes on commercial vehicles today.
False, The S-cam brakes are the most common.
Air Brakes use?
Air brakes systems are three braking systems combined they are?
Emergency, Parking, Service
The most common foundation brake is the?
S-cam drum brake
Front wheel braking
Is good under all conditions
The low air pressure warning light must come on before the air pressure in the tanks falls below what psi level?
The braking power of spring brakes depends on?
1. Proper adjustment 2. How far the modulating control lever(if present) is moved 3. Traction
You have a fully-charged air system (125 psi). After turning off the engine and releasing the service brake what are the maximum leakage rates per minute for both single and combination vehicles?
2 psi for single, 3 psi for combination
In checking that the spring brakes come on automatically you should not?
Pull the parking brake control knob.
When should you not use the parking brakes?
1. If the brakes are very hot 2. If the brakes are wet during freezing weather 3. When testing the spring brakes
Before driving a vehicle with a dual air system, allow time for the air compressor to build up to 100 psi pressure in which of the following?
Both the primary and secodary systems
On trailer air lines, the service line is connected to "what" on the trailer(s) to apply more or less pressure to the trailer brakes?
Relay Valves On trailer air lines, the service line is connected to RELAY VALVES on the trailers to apply more or less pressure to the trailer brakes.
Fully loaded rigs are how many" " times more likely to rollover in a crash than empty rigs?
10 Fully loaded rigs are 10 times more likely to rollover in a crash than empty rigs.
What should you keep lubricated to keep from having "steering" problems because of friction between tractor and trailer?
FIFTH WHEEL PLATE Failure to keep the Fifth Wheel Plate lubricated could cause steering problems because of friction between tractor and trailer.
What will happen if the service and emergency air lines are crossed when hooking up an old trailer, what will happen?
You will be able to drive away, but you won't have trailer brakes.
What should you do when lowering the landing gear of a loaded trailer?
Turn the crank in low gear a few extra turns after the landing gear makes firm contact with ground.
The standard following distance behind other vehicles is?
At least one second for each ten feet of vehicle length plus another second if going over 40 mph.
Why are "bobtail" tractors harder to stop?
Because the vehicle is "lighter"
You need how " " times more stopping disatance when stopping a combination at 40 miles per hour than at 20 miles per hour?
FOUR times You need 4 times more stopping distance when stopping a combination at 40 miles per hour than at 20 miles per hour.
In coupling, where should the tractor be lined up?
Slightly to the right of the trailer.
The trailer air supply "Controls or Supplies" what?
Supplies the trailer with air.
Why do you need a tractor protection valve?
It keeps air in the tractor if the trailer breaks away or develops a bad leak.
When the fifth wheel locking lever is almost in the locking position but will not lock, what should you do?
Have it repaired before driving.
To make sure the kingpin and fifth wheel connection are secure, what should you do?
Slowly drive forward with the trailer brakes locked
When testing the trailer emergency brakes, you should charge the air brakes system, check that the trailer rolls freely and?
Pull out the trailer air supply control.
During a walk around inspection, what is the position of the pintle hook and the dolly air drain valve?