General Knowledge - Full Test Sample #1, 50 questions
To prevent a load from shifting, there should be at least one tiedown for every __ feet of cargo.
10
15
7
You are driving a 40-foot vehicle at 35mph. The road is dry and visibility is good. What is the least amount of space you should keep in front of your vehicle to be safe?
2 seconds.
4 seconds.
6 seconds.
Which of these statements about drinking alcohol is true?
A few beers have the same effect on driving as a few shots of whiskey or a few glasses of wine.
Coffee and fresh air will help a drinker sober up.
Not everyone who drinks is affected by alcohol.
While driving, ice builds up on your wipers and they no longer clean the windshield. You should:
Keep driving, and turn your defroster on. Drive slower until you can see again.
Keep driving, and spray the windshield with washer fluid.
Stop safely and fix the problem.
Which of these statements about driving in areas with strong winds is true?
Winds are a big problem when a truck comes out of tunnels.
You should drive alongside other vehicles to help break up the wind.
The lighter you vehicle, the less trouble you will have with the wind.
What is counter-steering?
Steering in the opposite direction from what other drivers expect you to.
Turning the wheel in a counterclockwise fashion.
Turning the wheel back in the other direction after steering to avoid a traffic emergency.
To help you stay alert while driving you should:
Schedule trips for hours you are normally asleep.
Take cold medicine, if you have a cold.
Take short breaks before you get drowsy.
You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You can drive a vehicle hauling hazardous materials when:
The cargo will be transported less than 100 miles.
The vehicle does not require placards.
A person who has the Hazardous Materials Endorsement rides with you.
Cargo inspections:
Are most often not the responsibilities of the driver.
Should be performed as part of your pre-trip inspection, again within the first 50 miles of your trip, then again after you have driven 3 hours or 150 miles, and after every break you take during driving.
Are needed only if hazardous materials are being hauled.
Retarders:
Cause extra brake wear.
Allow you to disconnect the steering axle brakes.
Can cause the drive wheels to skid when they have poor traction.
You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade?
The same gear you would use to climb the hill.
A lower gear than you would use to climb the hill.
Shift into neutral and coast.
Which of these statements about speed management is true?
Empty trucks always stop in shorter distance than fully loaded ones.
When you double your speed (go twice as fast), it will take twice the distance to stop.
You should choose a speed that lets you stop within the distance that you can see ahead.
Which of these best describes how you should use the brake pedal on a steep downhill grade?
Snubbing.
Repeated strong pressure, then release.
With stronger pressure as the vehicle goes downhill.
Which of these statements about double clutching and shifting is true?
Double clutching should not be used when the road is slippery.
Double clutching should only be used with a heavy load.
You can use the tachometer to tell you when to shift.
Which of these statements about using turn signals is true?
You do not need to use your turn signal when changing lanes in traffic on a four-lane highway.
When turning, you should signal early.
You should use your turn signal to mark your vehicle when it is pulled off on the side of the road.
Which of these statements about cargo loading is true?
The legal maximum weight allowed by a state can be considered safe for all driving conditions.
State laws dictate legal weight limits.
If the shipper loads the cargo, the driver is not responsible for overloading.
If your vehicle catches fire while you are driving, you should:
Park in an open area.
Park where a building or trees shelter your vehicle from the wind.
Increase your speed to put out the flames.
You are checking your tires for a pre-trip inspection. Which of these statements is true?
Tires of mismatched sizes should not be used on the same vehicle.
Radial and bias-ply tires can be used together on the same vehicle.
A tread depth of 2/32 inch is safe for the front tires.
You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?
It may be a slow-moving vehicle.
The vehicle is hauling hazardous material.
It is a law enforcement vehicle.
An en route inspection should include checking for:
Tire overheating and brake overheating.
Cargo secured properly.
Both of these are correct.
You’re driving in the right lane of a four-lane, undivided road. You come over a hill and find a car stopped ahead in your lane. You do not have room to stop. The hill blocks your view to the rear. The shoulder is clear. Which of these is most likely the best action to take?
Steer into the left lane.
Steer to the right.
Use hard braking and brace for collision.
Where or when should you test the stopping action of your service brakes?
In the parking lot when the vehicle is not moving.
When the vehicle is moving at about 5 mph.
At a special Brake Testing Center only.
Which of these is not part of the pre-trip inspection of the engine compartment?
Valve clearance.
Condition of hoses.
Worn electrical wiring insulation.
Cargo covers:
Protect people from spilled cargo.
May be a safety requirement in some States.
Both answers are correct.
High beams should be:
Used when it is safe and legal to do so.
Turned on when an oncoming driver does not dim his or her lights.
Dimmed at the time that you get within 100 feet of another vehicle.
Which of these is the most important thing to remember about emergency braking?
Disconnecting the steering axle brakes will help keep your vehicle in a straight line during emergency braking. ·
If the wheels are skidding, you cannot control the vehicle.
Never do it without downshifting first.
You must park on the side of a level, straight, two-lane road. Where should you place the reflective triangles?
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.
One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet to the front of the vehicle.
One about 50 feet to the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet to the front of the vehicle.
The road you are driving on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation?
Stop driving as soon as you can safely do so.
Downshift to stop.
Apply the brakes often to keep the linings dry.
Which of these statements about tires and hot-weather driving is true?
The air pressure of a tire decreases as the temperature of the tire increases.
If a tire is too hot to touch, you should drive on it to cool it off.
You should inspect your tires every two hours or every 100 miles when driving in very hot weather.
Your truck is in a traffic emergency and may collide with another vehicle if you do not take action. Which of these is a good rule to remember at such a time?
You can almost always turn to miss an obstacle more quickly than you can stop.
Stopping is always the safest action in a traffic emergency.
Leaving the road is more risky than hitting another vehicle.
What should you do when your vehicle hydroplanes?
Accelerate slightly.
Counter-steer hard.
Release the accelerator.
You are starting your vehicle from a stop. As you apply power to the driver wheels, they start to spin. You should:
Take your foot off the accelerator.
Press harder on the accelerator.
Try a lower gear.
Stab braking:
Should never be used.
Involves releasing the brakes only after the wheels lock up.
Involves steady pressure on the brake pedal without locking the wheels.
It takes the body about ___ hours to get rid of the alcohol in four drinks.
2
4
6
Cargo that can shift should have at least __ tie-downs(s).
1
2
3
If a straight vehicle (no trailer or articulation) goes into a front-wheel skid, it will:
Slide sideways and spin out.
Go straight ahead even if the steering wheel is turned.
Go to the right.
Which of these statements about accelerating is true?
Rough acceleration can cause mechanical damage.
You should feel a "jerking" motion if you are accelerating your vehicle properly.
When traction is poor, more power should be applied to the accelerator.
Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle?
Heavy vehicles need larger gaps in traffic than cars.
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.
Because heavy vehicles are easy to see, you can count on other drivers to move out of your way or slow down for you.
Which of these statements about staying alert to drive is true?
A half-hour break for coffee will do more to keep you alert than a half-hour nap.
There are drugs that can overcome fatigue.
Sleep is the only thing that can overcome fatigue.
You are driving on a two-lane road. An oncoming driver drifts into your lane and is headed straight for you. Which of these is most often the best action to take?
Hard braking.
Steer to the right.
Prepare for impact.
Which of these statements about engine overheating is true?
If your engine overheats within 20 miles of the end of your trip, you should complete the trip and then check the problem.
You should never shut off an overheated engine until it cools.
You should never remove the radiator cap on a pressurized system until the system has cooled.
You are driving a truck with a manual transmission. You have to stop the truck on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting it back in motion up the grade?
Keep the clutch slipping while slowly accelerating.
Use the parking brake to hold the vehicle until the clutch engages.
Let the vehicle roll straight backwards a few feet before you engage the clutch.
A vehicle is loaded with most of the weight on the steering axle. What may result?
Hard steering and possible damage to the tires.
Better handling.
Too little traction on the steering axle.
You are driving a 40-foot vehicle at 50 mph. Driving conditions are ideal (dry pavement, good visibility). What is the least amount of space that you should keep in front of your vehicle to be safe?
3 seconds.
4 seconds.
5 seconds.
Which of these is a good thing to do when steering to avoid a crash?
Apply the brakes while turning.
Steer with one hand so that you can turn the wheel more quickly.
Do not turn any more than needed to clear what is in your way.
You are checking your wheels and rims for a pre-trip inspection. Which of these statements is true?
Rust around lug nuts may mean that they are loose.
Cracked wheels or rims can be used if they have been welded.
A vehicle can be safely driven with one missing lug nut on a wheel.
You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You are asked to deliver hazardous material in a placarded vehicle. You should:
Refuse to haul the load.
Take the placards off the vehicle.
Haul the load, but only to the nearest place where a driver with a Hazardous Materials Endorsement can take over.
As the Blood Alcohol Concentration (BAC) goes up, what happens?
The drinker more dearly sees how alcohol is affecting him/her.
Judgment and self-control are affected.
The drinker can sober up in less time.
If you need to leave the road in a traffic emergency, you should:
Try to get all wheels off the pavement.
Avoid braking until your speed has dropped to about 20mph.
Tap repeatedly on the brakes.
Which of these statements about downshifting for a long downhill grade is true?
It should not be done with an automatic transmission.
It allows engine compression and friction to help slow the vehicle.
The proper time to downshift is just after the vehicle starts down the hill.
When looking ahead of your vehicle while driving you should look:
To the right side of the road.
As far as your peripheral vision can see.
Back and forth, near and far.
Escape ramps are:
Used to stop runaway vehicles.
Used to get out of a burning truck.
For combination vehicles only.
Which of these statements about cold-weather driving is true?
An engine cannot overheat when the weather is very cold.
Windshield washer antifreeze should be used.
Exhaust system leaks are less dangerous in cold weather.
When should you wear seat belts?
Anytime you are in a moving vehicle.
Only in states where law requires it.
Whenever you are hauling hazardous materials.
Controlled braking:
Can be used while you are turning sharply.
Involves locking the wheels for short periods of time.
Is used to keep a vehicle in a straight line when braking.
How do you correct a rear-wheel acceleration skid?
Apply more power to the wheels.
Counter-steer the steering wheel.
Stop accelerating.
Which of these is NOT a good rule to follow when caring for injured at an accident scene?
If a qualified person is helping them, stay out of the way unless asked to assist.
Keep injured persons cool.
Move severely injured persons if there is a danger due to fire or passing traffic.
For your safety, when setting out reflective triangles you should:
Carry the triangles at your side.
Hold the triangles between yourself and oncoming traffic.
Keep them out of sight while you walk to the spots where you set them out.
Heavy vehicles must sometimes travel more slowly than other traffic. Which of these is NOT a good rule to follow when you are driving such a vehicle?
Signal other drivers when it is safe for them to pass you.
Stay to the right.
Turn on your flashers if it is legal to do so.
The most important reason for being alert to hazards is so:
Accident reports will be accurate.
Law enforcement personnel can be called.
You will have time to plan your escape if the hazard becomes an emergency.
Hydroplaning:
Cannot occur when driving through a puddle.
Only occurs at speeds above 50 mph.
Is more likely if tire pressure is low.
If you are being tailgated, you should:
Increase your following distance.
Flash your brake lights.
Signal the tailgater when it is safe to pass you.
Which of these statements about overhead clearance is true?
You should assume posted clearance signs are correct.
The weight of a vehicle changes its height.
If the road surface causes your vehicle to tilt toward objects at the edge of the road; you should drive close to the shoulder.
Which of these is a good rule to follow when using a fire extinguisher?
Keep as close to the fire as possible.
Stay downwind of the fire.
Aim at the base of the fire.
While driving, you see a small (1-foot square) cardboard box ahead in your lane. You should:
Steer around it without making a sudden or unsafe move.
Brake hard to avoid hitting it.
Hit it with your vehicle to knock it off the road.
Is it legal to drive with one fourth of a vehicle’s leaf springs broken or missing?
It doesn't make any difference as long as you go the speed limit.
Yes.
No.
Which of these can cause a fire?
Loose fuel connections.
Under-inflated tires.
Electrical short circuits.
All of the answers are correct.
Dry bulk tanks and hanging meat:
Have low centers of gravity.
Do not require special care.
Are unstable loads.
Which of the following should you NOT do in the event of hydraulic brake failure?
Shift up.
Use the parking or emergency brake.
Pump the brakes.
To correct a drive-wheel braking skid you should:
Turn slowly.
Keep your foot off the clutch.
Counter-steer.
Which of the following statements about tank vehicles is true?
All tank vehicles have some sort of bulkhead or baffle.
The term "tank vehicle" refers only to those vehicles having a permanently attached tank.
Special skills are required to haul liquid tanks.
If you are driving a long distance, you should:
Stop often and take short breaks before you feel really drowsy or tired.
Take a short break once or twice during the trip where you are feeling tired or drowsy.
Avoid short breaks, but keep the window open.
Which of the following is true about a vehicle with a high center of gravity?
The vehicle is less likely to tip over.
The cargo should be rearranged so that the heaviest parts of the cargo are under the lightest parts.
The vehicle is less dangerous on curves.
To prevent skidding, you should:
Brake hard at all stops.
Turn the wheel sharply for all turns.
Adjust to conditions while driving.
You should back and turn toward the driver's side:
Unless you would have to drive around the block first.
So you can watch the rear of the vehicle by looking out the side window.
If you do not have someone to help you.
When you check the condition of visible parts during your pre-trip inspection, make sure that the __are secured against snagging, rubbing or wearing.
Primary and secondary safety cab locks.
Frame and cross members.
Airlines and electrical wiring.
With BAC (Blood Alcohol Concentration) of__, most people lose consciousness, and some die.
0.40
0.16
0.10
The distance your vehicle travels from the time your eyes see a hazard until your brain recognizes it is called ___ distance.
Perception.
Reaction.
Braking.
Which of these items is checked in a pre-trip inspection?
Whether all vehicle lights are working and clean.
Cargo securement.
Wiper blades.
All of these answers are correct.
The "reaction distance" is the distance traveled from the time:
The brain tells the foot to push the brake pedal to the time the foot actually pushes the pedal.
The eyes see a hazard to the time the brain knows that it is a hazard.
The eyes see a hazard to the time the foot pushes the brake pedal.
When driving a commercial vehicle with a height over 13 feet, you should:
Stop and make sure the clearance is high enough for your vehicle's height.
Not worry about the height clearance as long as you stay on the state or federal highways.
Assume all clearances are high enough.
The purpose of a baffle is to:
Control the load surge.
Separate the load.
To keep expansion of load down.
The new BAC (Blood Alcohol Concentration) for commercial drivers to be considered intoxicated when driving a commercial vehicle is:
0.02
0.06
0.04
Truck escape ramps:
Cannot be used by certain types of heavy vehicles.
Are designed to protect vehicles from damage.
Should not be used unless you have first tried all other ways to save your vehicle after brake failure.
Which of these can cause the vehicle to skid?
Not enough weight on the front axle.
Over acceleration.
Turning too sharply.
AII of these can cause a vehicle to skid.
Which of these describes how you should use the brake pedal on a steep downhill grade?
Release the brake when you are 5 MPH below your safe speed, then let your speed come back up to your safe speed and repeat braking again (bring your speed down 5 MPH below your safe speed).
With stronger pressure as the vehicle goes downhill.
Light steady pressure.
An en-route inspection should include checking:
Cargo doors and/or cargo securement.
Tire temperature.
Brake temperature.
All of these should be checked.
According to the driver's manual, why should you limit the use of your horn?
It wears down the battery.
It can startle other drivers.
The horn is not a good way to let others know you're there.
The amount of liquid to load into a tank depends on:
The weight of the liquid.
The legal weight limits.
The amount of liquid will expand in transit.
All of these answers are correct.
You should use your mirrors to check:
Traffic gaps before you merge.
The condition of the tires and cargo.
Where the rear of your vehicle is while you make turns.
All of these answers are correct.
Your brakes can get wet when you drive through a heavy rain. What can this cause when the brakes are applied?
Lack of braking power.
Trailer jackknife.
Wheel lockup.
All of these answers are correct.
Which of these statements about using mirrors is true?
There are blind spots that your mirrors cannot show you.
You should check your mirrors twice for a lane change.
You should look at a mirror for several seconds at a time.
To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 MPH on the shoulder. How should you move back onto the pavement?
Keep moving at the present speed and steer very gently back onto the pavement.
Come to a complete stop, if possible, before steering back onto the pavement.
Brake hard to slow the vehicle, then steer sharply onto the pavement.
Which of these statements about managing space is true?
Smaller vehicles require more space to stop than larger ones.
When the road is slippery, you should keep much more space in front of your vehicle.
Many accidents are caused by drivers keeping too much space in front of their vehicles.
You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem?
The brake pedal goes to the floor.
Stopping action is delayed.
The vehicle pulls to one side when the brake pedal is pressed.
All of these answers are correct.
The distance that you should look ahead of your vehicle while driving amounts to about __ at highway speed.
¼ mile (one-fourth)
25 feet
1 mile
Which of these statements about drinking alcohol is true.
Alcohol first affects judgment and self-control, which are essential for safe driving.
Statistics show that drivers who have been drinking have a much greater chance of being in a crash.
A driver can lose their license for driving while under the influence of alcohol.
All of these answers are true.
On which fires can you use the "ABC" fire extinguisher?
Electrical fires.
Burning tires.
Burning cloth.
All of these answers are correct.
Which of these is a proper use of vehicle lights and flashers?
Flashing your brake lights to warn someone behind you of a hazard that will require slowing down.
Turning on your headlights during the day when visibility is reduced due to rain or snow.
Flashing your brake lights to warn someone behind you that you're are going to stop on the road.
All of these answers are correct.
Which of these tell you that cargo contains hazardous materials?
A four-inch, diamond shaped hazardous materials label on the container.
A hazardous materials placard on the vehicle.
Both of these answers are correct.
Neither of these answers are correct.
If you are convicted for driving under the influence while driving a commercial vehicle, and this is your first offense, you will most likely get:
A fine of $500.
Probation for a period of one year.
At least a one-year suspension of your CDL.
Some liquid tanks are divided into several smaller tanks by:
Regulators.
Bulkheads.
Baffles.
Front-end header boards:
Block the forward movement of your cargo.
Protect you from your cargo in case of collision.
Both answers are correct.
The height of the vehicle center of gravity is very important for safe handling. A high center of gravity means you are more likely to do the following:
Rollover.
Stop faster.
Get Stuck.
The "load" means the following?
Specified pressure an air tire can carry.
The maximum safe weight a tire can carry at a specified pressure.
Neither of these answers are correct.
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