1 / 50
A. Must be pulled after every working day
B. Pulling a hand valve
C. Self-operated when the air pressure is above 150 PSI
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.
2 / 50
A. 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
B. 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
C. 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
D. 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
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.
3 / 50
A. A fine of $500
B. At least a one-year suspension of your CDL
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.
4 / 50
A. a spare jacket.
B. a fire extinguisher.
C. spare electrical fuses.
D. warning devices.
Vehicles must be equipped with emergency equipment. Look for: fire extinguisher(s), spare electrical fuses (unless equipped with circuit breakers), and warning devices for parked vehicles.
5 / 50
A. Steer to the right
B. Hard braking
C. Steer into the oncoming lane
D. Steer onto the left shoulder
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.
6 / 50
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.
7 / 50
A. Bearing plate
B. Leaf spring
C. Gear box
D. Torque rod
The gear box is part of the steering system, and other choices are parts of the suspension system
8 / 50
A. 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.
9 / 50
A. Look for an escape ramp or escape route
B. Pump the brake pedal
Know escape ramp locations on your route. Signs show drivers where ramp are located. Escape ramps save lives, equipment and cargo.
10 / 50
A. Yes, as long as the radiator isn't damaged
D. Yes, as long as there is no overflow
Never remove the radiator cap or any part of the pressurized system until the system has cooled. Steam and boiling water can spray under pressure and cause severe burns.
11 / 50
A. All answers are correct
B. Flashing your brake lights to warn someone behind you that you're are going to stop on the road
C. Turning on your headlights during the day when visibility is reduced due to rain or snow
D. Flashing your brake lights to warn someone behind you of a hazard that will require slowing down
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.
12 / 50
A. Loose fuel connections
B. Electrical short-circuits
C. Under-inflated tires
D. All answers are correct
Under-inflated tires, loose fuel connections, and electrical short-circuits can all lead to fires.
13 / 50
A. All answers are correct
B. Must be shown immediately when an officer request it
C. May be brought up to date once a week
D. Is also called a tachograph
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.
14 / 50
A. 5 seconds
B. 2 seconds
C. 3 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.
15 / 50
A. Signal them to pass you
B. Back off
C. Speed up
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.
16 / 50
A. Too much play in the steering wheel is not a problem
B. All answers are correct
C. Damage to the tires
D. Poor traction
Under-loaded front axles can make the steering axle weight too light to steer safely.
17 / 50
A. Driving too fast for road conditions
B. Bad tires
C. Poorly adjusted brakes
D. Poorly designed roads
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
18 / 50
A. Brakes have more stopping power when they get very hot
B. The heavier a vehicle or the faster it is moving, the more heat the brakes must absorb to stop it
C. Brake drums cool very quickly when the vehicle is moving very fast
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.
19 / 50
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.
20 / 50
A. Turned on when an oncoming driver does not dim his or her lights
B. Used whenever it is safe and legal to do so
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.
21 / 50
A. A shaded area
B. A bridge
C. A wet-looking road
D. All of the above
Here are some signs of slippery roads: shaded areas, bridges, melting Ice, black Ice makes the road look wet, and just after rain begins.
22 / 50
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.
23 / 50
A. Backing safely
B. 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
24 / 50
A. Both above
B. No answers are correct
C. The weight transmitted to the ground by one axle or one set of axles
D. The weight transmitted to the tires from the axle
Axle Weight is the weight transmitted to the ground by one axle or one set of axles
25 / 50
A. No answers are correct
B. 50 miles
C. 100 miles
D. 25 miles
Inspect the cargo and its securing devices within the first 50 miles after beginning a trip. Make any adjustments needed.
26 / 50
A. It may turn uphill.
B. It may be located a few miles from the top of a downgrade.
C. It is not useful if you are traveling too fast.
D. It may be made of soft gravel.
Your best hope is an escape ramp. If there is one, there will be signs telling you about it. Use it. Ramps are usually located a few miles from the top of the downgrade. Escape ramps save lives, equipment and cargo.
27 / 50
A. The heavier your load, the smaller the gap needed to cross traffic
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. 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
D. Heavy vehicles need larger gaps in traffic than cars
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.
28 / 50
A. a small sample of whatever is inside.
B. a picture of whatever is inside.
C. all of the above.
D. that you don't exceed gross weight or axle weight limits.
You cannot inspect sealed loads, but you should check that you don't exceed gross weight and axle weight limits.
29 / 50
A. After 9 hours
B. When you become sleepy
C. After 5 hours
D. After 7 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.
30 / 50
A. Set the parking brake whenever necessary
B. Apply the trailer brake hand valve
C. Do all of the above
D. Engage the clutch before removing your foot from the brake
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
31 / 50
A. Protect you from your cargo in case of collision
B. No answers are correct
C. Protect you from your cargo in case of collision and block the forward movement of your cargo
D. 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.
32 / 50
A. You should drive alongside other vehicles to help break up the wind
B. Winds are especially a problem when coming out of tunnels
C. The lighter your vehicle, the less trouble you will have with 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.
33 / 50
A. Protect vehicle following you from spilled cargo
B. All answers are correct
C. Protect the roadway from spilled cargo
D. Protect people 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.
34 / 50
On packed snow, reduce speed by a half, or more. If the surface is icy, reduce speed to a crawl and stop driving as soon as you can safely do so.
35 / 50
A. The amount of liquid will expand in transit
B. The legal weight limits
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.
36 / 50
B. broken leaf springs
C. twisted axles
Check wheel bearing seals to make sure they are not leaking.
37 / 50
A. Novelty lights
B. Emergency flashers
C. High beams
D. Low beams
Some drivers make the mistake of always using low beams. This seriously cuts down on their ability to see ahead. 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.
38 / 50
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.
39 / 50
A. Oversize loads can be hauled without special permits during times when the roads are not busy
B. Unstable loads such as hanging meat or livestock require extra caution on curves
C. Loads that consist of liquids in bulk do not present vehicle handling problems because they are usually very heavy
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.
40 / 50
A. 32 feet
B. 61 feet
C. 93 feet
¾ second to 1 second. At 55 mph this accounts for 61 feet traveled
41 / 50
A. Check critical items such as the windshield wipers, heater, and defroster
B. Call in and check with dispatch
C. Check critical items such as the tires, brakes, and cargo tie-downs
For an e-route inspection: check the tires, wheels, and truck body for signs of heat whenever you stop during a trip.
42 / 50
B. 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.
43 / 50
Cargo should have at least one tie-down for each ten feet of cargo. Make sure you have enough tiedowns to meet this need. For a 20-foot load you would need at least 2 tie downs.
44 / 50
A. Leaving the road is always riskier than hitting another vehicle
B. Heavy vehicles can almost always turn more quickly than they can stop
C. Stopping is always the safest action in a traffic emergency
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.
45 / 50
A. It will make the tires stick to the road
B. It will give the tires more traction
C. It makes the road more slippery
Tar in the road pavement frequently rises to the surface in very hot weather. Spots where tar "bleeds" to the surface are very slippery.
46 / 50
A. Perception distance, reaction distance, brake lag distance, and effective braking distance
B. Perception distance and effective braking distance
C. Reaction distance and effective braking distance
Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = Total Stopping Distance.
47 / 50
A. 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.
48 / 50
A. One missing leaf in a leaf spring can be dangerous
B. Brake shoes should not be worn dangerously thin
C. All answers are correct and true
D. Brake pads should not have brake fluid on them
Brake pads should not be dangerously this or have fluid on them, and a missing leaf in the leaf spring suspension is very dangerous.
49 / 50
A. More than the length of a football field
B. Twice the length of the vehicle
C. The length of a football field
D. The length of a vehicle
At 55 mph, your vehicle will travel a minimum of 419 feet.
50 / 50
A. 1/4 mile
B. One block
C. 500 feet
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.