1 / 40
A. All answers are correct
B. Loose fuel connections
C. Under-inflated tires
D. Electrical short-circuits
Under-inflated tires, loose fuel connections, and electrical short-circuits can all lead to fires.
2 / 40
D. All answers are correct
Pre-trip is an inspection before you leave, en-route occurs during your daily travel, and post-trip happens at the end of your day.
3 / 40
A. Backing safely
D. First-aid certification
To drive a vehicle safely, you must be able to control its speed and direction. Safe operation of a commercial vehicle requires skill in: accelerating, steering, stopping, and backing safely
4 / 40
A. The best way to cross traffic is to pull the vehicle partway across the road and block one lane while waiting for the other to clear
B. Because heavy vehicles are easy to see, you can count on other drivers to move out of your way or slow down for you
C. Heavy vehicles need larger gaps in traffic than cars
D. The heavier your load, the smaller the gap needed to cross traffic
Because of slow acceleration and the space large vehicles require, you may need a much larger gap to enter traffic than you would in a car. Acceleration varies with the load, allow more room if your vehicle is heavily loaded. Before you start across a road, make sure you can get all the way across before traffic reaches you.
5 / 40
B. Pump the brake pedal
C. Look for an escape ramp or escape route
Know escape ramp locations on your route. Signs show drivers where ramp are located. Escape ramps save lives, equipment and cargo.
6 / 40
A. Steer to the right
B. Hard braking
C. Steer onto the left shoulder
D. Steer into the oncoming lane
If an oncoming driver has drifted into your lane, a move to your right is best. If that driver realizes what has happened, the natural response will be to return to his or her own lane.
7 / 40
A. Leaf spring
B. Bearing plate
C. Torque rod
D. Gear box
The gear box is part of the steering system, and other choices are parts of the suspension system
8 / 40
A. Brakes have more stopping power when they get very hot
B. Brake drums cool very quickly when the vehicle is moving very fast
C. The heavier a vehicle or the faster it is moving, the more heat the brakes must absorb to stop it
Applying the brakes causes friction to slow the vehicle, the faster it is moving, or the heavier it is the more heat that must be absorbed to stop the vehicle.
9 / 40
A. It can startle other drivers
B. It wears down the battery
C. The horn is not a good way to let others know you are there
Your horn can let others know you're there. It can help to avoid a crash. Use your horn when needed. However, it can startle others and could be dangerous when used unnecessarily.
10 / 40
It is illegal to operate a CMV if your blood alcohol concentration (BAC) is .04% or more. If you operate a CMV, you shall be deemed to have given your consent to alcohol testing.
11 / 40
A. 3 seconds
B. 5 seconds
C. 2 seconds
D. 4 seconds
One good rule says you need at least one second for each 10 feet of vehicle length at speeds below 40 mph. At greater speeds, you must add 1 second for safety.
12 / 40
A. Accelerate slightly
B. Release the accelerator
C. Start stab braking
You can regain control by releasing the accelerator and pushing in the clutch. This will slow your vehicle and let the wheels turn freely. If the vehicle is hydroplaning, do not use the brakes to slow down.
13 / 40
A. 500 feet
B. One block
C. 1/4 mile
Most good drivers look at least 12 to 15 seconds ahead. That means looking ahead the distance you will travel in 12 to 15 seconds. At lower speeds, that's about one block. At highway speeds it's about a quarter of a mile.
14 / 40
A. The lighter your vehicle, the less trouble you will have with the wind
B. Winds are especially a problem when coming out of tunnels
C. You should drive alongside other vehicles to help break up the wind
Strong winds make it difficult to stay in your lane. The problem is usually worse for lighter vehicles. This problem can be especially bad coming out of tunnels.
15 / 40
A. 25 miles
B. 100 miles
C. No answers are correct
D. 50 miles
Inspect the cargo and its securing devices within the first 50 miles after beginning a trip. Make any adjustments needed.
16 / 40
A. Used whenever it is safe and legal to do so
B. Turned on when an oncoming driver does not dim his or her lights
C. Dimmed when you are within 100 feet of another vehicle
Use high beams when it is safe and legal to do so. Use them when you are not within 500 feet of an approaching vehicle.
17 / 40
B. Moving at highway speed
C. Moving slowly
D. Going downhill
To test the parking brakes: Fasten safety belt, set parking brake, release trailer parking brake, Place vehicle into a low gear, gently pull forward against parking brake to make sure the parking brake holds. If it doesn't hold vehicle, it is faulty; get it fixed.
18 / 40
A. All answers are correct
B. Protect vehicle following you from spilled cargo
C. Protect people from spilled cargo
D. Protect the roadway from spilled cargo
There are two basic reasons for covering cargo: to protect people from spilled cargo, and to protect the cargo from weather. Spill protection is a safety requirement in many states. Be familiar with the laws in the states you drive in.
19 / 40
A. One within 10 feet of the front of the vehicle, one about 200 feet from the front, and one about 100 feet to the rear
B. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle
C. One about 50 feet from the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle
D. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 200 feet to the rear
If you stop on a two-lane road carrying traffic in both directions or on an undivided highway, place warning devices within 10 feet of the front or rear corners to mark the location of the vehicle and 100 feet behind and ahead of the vehicle, on the shoulder or in the lane you stopped in.
20 / 40
A. The legal weight limits
B. The amount of liquid will expand in transit
C. All answers are correct
D. The weight of the liquid
A full tank of dense liquid (such as some acids) may exceed legal weight limits. The amount of liquid to load into a tank depends on: the amount the liquid will expand in transit, the weight of the liquid, legal weight limits.
21 / 40
A. It may be a slow-moving vehicle
B. The vehicle is hauling hazardous materials
C. It is a law enforcement vehicle
Some vehicles, by their nature, are slow and some of these will have the "slow moving vehicle" symbol to warn you. This is a red triangle with an orange center.
22 / 40
A. 32 feet
B. 61 feet
C. 93 feet
¾ second to 1 second. At 55 mph this accounts for 61 feet traveled
23 / 40
A. Stopping is always the safest action in a traffic emergency
B. Leaving the road is always riskier than hitting another vehicle
C. Heavy vehicles can almost always turn more quickly than they can stop
When you don't have enough room to stop, you may have to steer away from what's ahead. Remember, you can almost always turn to miss an obstacle more quickly than you can stop.
24 / 40
A. At least a one-year suspension of your CDL
B. A fine of $500
C. A warning
You will lose your CDL for at least one year for a first offense for: Driving a CMV if your blood alcohol concentration is .04% or higher or driving a CMV under the influence of alcohol.
25 / 40
A. Back off
B. Speed up
C. Signal them to pass you
Backing off just means you slow down, if the vehicle was in a blind spot this change in speed should force it out of the blind spot.
26 / 40
A. Flashing your brake lights to warn someone behind you that you're are going to stop on the road
B. Turning on your headlights during the day when visibility is reduced due to rain or snow
C. Flashing your brake lights to warn someone behind you of a hazard that will require slowing down
D. All answers are correct
Warn following drivers by flashing your brake lights, don't stop suddenly. If you see a hazard that will require slowing down, warn the drivers behind by flashing your brake lights. At dawn, dusk, in rain, or snow, you need to make yourself easier to see so turn on your lights.
27 / 40
A. After 5 hours
B. When you become sleepy
C. After 7 hours
D. After 9 hours
If you look sleepy, or you just feel sleepy, stop driving! You are in a very dangerous condition. The only safe cure is to sleep.
28 / 40
A. Pulling a hand valve
B. Self-operated when the air pressure is above 150 PSI
C. Must be pulled after every working day
A safety relief valve is installed in the first tank the air compressor pumps air to. The safety valve protects the tank and the rest of the system from too much pressure. The valve is usually set to open automatically at 150 psi.
29 / 40
A. Poorly adjusted brakes
B. Bad tires
C. Poorly designed roads
D. Driving too fast for road conditions
A skid happens whenever the tires lose their grip on the road. Most serious skids result from driving too fast for road conditions. Drivers who adjust their driving to conditions don't overaccelerate and don't have to over-brake or oversteer from too much speed
30 / 40
A. Loads that consist of liquids in bulk do not present vehicle handling problems because they are usually very heavy
B. Unstable loads such as hanging meat or livestock require extra caution on curves
C. Oversize loads can be hauled without special permits during times when the roads are not busy
Hanging meat can be a very unstable load with a high center of gravity, particular caution is needed on sharp curves such as off ramps and on ramps. Livestock can move around in a trailer, causing unsafe handling, and special care is necessary because livestock can lean on curves.
31 / 40
A. Reaction distance and effective braking distance
B. Perception distance, reaction distance, brake lag distance, and effective braking distance
C. Perception distance and effective braking distance
Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = Total Stopping Distance.
32 / 40
A. Is also called a tachograph
B. All answers are correct
C. May be brought up to date once a week
D. Must be shown immediately when an officer request it
Enforcement of the HOS (Hours of Service) rules is generally handled by DOT officers of their respective states, although any ordinary police officer may inspect a driver's log book.
33 / 40
A. Only when the shipment will not cross state lines
C. Only when the vehicle does not require placards
You can drive a vehicle that carries hazardous materials if it does not require placards. If it requires placards, you cannot drive it unless your driver license has the hazardous materials endorsement.
34 / 40
A. Do all of the above
B. Apply the trailer brake hand valve
C. Engage the clutch before removing your foot from the brake
D. Set the parking brake whenever necessary
Don't roll back when you start. You may hit someone behind you. If you have a manual transmission vehicle, partly engage the clutch before you take your right foot off the brake. Put on the parking brake whenever necessary to keep from rolling back. Release the parking brake only when you have applied enough engine power to keep from rolling back
35 / 40
A. All answers are correct and true
B. Brake shoes should not be worn dangerously thin
C. Brake pads should not have brake fluid on them
D. One missing leaf in a leaf spring can be dangerous
Brake pads should not be dangerously this or have fluid on them, and a missing leaf in the leaf spring suspension is very dangerous.
36 / 40
A. No answers are correct
B. The weight transmitted to the ground by one axle or one set of axles
C. The weight transmitted to the tires from the axle
D. Both above
Axle Weight is the weight transmitted to the ground by one axle or one set of axles
37 / 40
A. Poor traction
B. Damage to the tires
C. Too much play in the steering wheel is not a problem
D. All answers are correct
Under-loaded front axles can make the steering axle weight too light to steer safely.
38 / 40
A. The length of a football field
B. More than the length of a football field
C. The length of a vehicle
D. Twice the length of the vehicle
At 55 mph, your vehicle will travel a minimum of 419 feet.
39 / 40
A. Protect you from your cargo in case of collision
B. No answers are correct
C. Block the forward movement of your cargo
D. Protect you from your cargo in case of collision and block the forward movement of your cargo
Front-end header boards ("headache racks") protect you from your cargo in case of a crash or emergency stop. The front-end structure should block the forward movement of any cargo you carry.
40 / 40
A. Check critical items such as the windshield wipers, heater, and defroster
B. Check critical items such as the tires, brakes, and cargo tie-downs
C. Call in and check with dispatch
For an e-route inspection: check the tires, wheels, and truck body for signs of heat whenever you stop during a trip.