General Knowledge6 (Drivingtests.org)

Whenever you stop for a break during your trip, you should:

check critical items such as the radio, heater, and defroster.
call in and check with dispatch.
check critical items such as the tires, brakes, and cargo tie-downs.

Which of these is the most important thing to remember about emergency braking?

If the wheels are skidding, you cannot control the vehicle.
Never do it without downshifting first.
Disconnecting the steering axle brakes will help keep your vehicle in a straight line.

The purpose of retarders is to:

help prevent skids and reduce brake wear.
help slow the vehicle while driving and reduce brake wear.
apply extra braking power to the non-drive axles.

Your vehicle has hydraulic brakes. When traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?

Shifting into neutral may help slow the vehicle.
Pumping the brake may generate enough pressure to stop the vehicle.
The parking brake will not work because it is part of the same hydraulic system.

An en-route inspection should include checking:

for tire overheating and brake overheating.
that the cargo is properly secured.
Both of these will need checked.

Which of the following cannot be checked at the same time?

Brake lights, turn signals, and four-way flasher functions.
Headlights and amber reflectors.
Brake lights and red reflectors (on rear).

Which of these statements about overhead clearance is TRUE?

You should assume that the 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 will help keep an engine cool in hot weather?

Running the air conditioner.
Driving faster to force more air into the radiator.
Making sure the engine has the right amount of oil.

Which of these statements about managing space is true?

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.
Smaller vehicles require more space to stop than larger ones.

Which of these are proper uses of your brake lights?

Flashing your brake lights to warn someone behind you of a hazard that will require slowing down.
Flashing your brake lights to warn someone behind you that you are going to stop on the road.
Flash your brake lights when entering a construction zone if vehicles are close behind you.
All are proper use of a vehicle's lights.

You are driving on a two-lane road. An oncoming vehicle drifts into your lane and is headed straight for you. Which of the following should you do?

Steer to the right.
Brake hard.
Prepare for impact.

Which of these statements is true about warning other drivers of a stopped vehicle?

Move the rear reflective triangle back if the driver's vision is obscured to within 500 feet.
Set out your emergency warning devices within five minutes.
Keep the vehicle's taillights on to warn other drivers.

What does “axle weight” mean?

The weight transmitted to the ground by one axle or one set of axles.
The weight transmitted to the tires from the axle.
Both of these are correct.

You must park on the side of a level, straight, undivided 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 100 feet in 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 in front of the vehicle.
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.

Which of the following statements is true?

Most hazards are more easily seen at night than during the day.
Most people are more alert at night than during the day.
Many heavy vehicle accidents occur between midnight and 6 a.m.

Underloaded front axles can cause:

unsafe steering.
poor traction.
both of these.

Which of these is NOT a danger when an automatic transmission is forced into a lower gear at a high speed?

Loss of engine braking effect.
Loss of steering control.
Damage to the transmission.

Which of these statements is true about drugs?

A driver can use any prescription drug while driving.
Certain prescription drugs are allowed to reduce fatigue.
The use of alcohol or drugs can lead to a collision or an arrest.

You do not have a Hazardous Materials endorsement on your commercial driver’s license. You are asked to deliver hazardous materials in a placarded vehicle.

You should:

refuse to haul the load.
haul the load but only to the nearest place where a driver with a Hazardous Materials endorsement can take over.
take the placards off the vehicle.

Which of the following should you NOT do in the event of hydraulic brake failure?

Use the parking or emergency brake.
Upshift.
Pump the brakes.

You can see a sign on a vehicle ahead of you. The sign is a red triangle with an orange center. What does the sign tell you about the vehicle?

It is a slow-moving vehicle.
It is hauling hazardous material.
It is a law enforcement vehicle.

When caring for the injured at an accident scene, which of the following should you NOT do?

Allow injured persons to become chilled or overheated.
If a qualified person is helping them, stay out of the way unless asked to assist.
Move severely injured persons if there is a danger from fire or passing traffic.

Which of these statements is true about other drivers?

Mail or delivery truck drivers do not pose a hazard.
Rental truck drivers are often not used to the limited vision and pose a hazard.
Drivers using turn signals can be trusted to turn in the direction they indicate.

Overloading can have a bad effect on:

steering.
speed control.
Both of these.

The “load” means:

The maximum weight that a tire can safely carry at a specified pressure.
The specified pressure that a tire can safely bear.
Neither of these are correct.

Why do dry bulk tanks require special care?

They have a high center of gravity.
The load can shift.
Both of the these answers are correct.

Why should you signal continuously while turning?

Because you need both hands on the wheel to turn safely.
Because it is usually illegal to turn off your signal before starting a turn.
For both of these reasons

You should schedule your driving for:

the hours that you are normally awake.
between 10 a.m. and midnight.
between 4 a.m. and 6 p.m.

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 and let your speed come back up to your safe speed. Then repeat braking to 5 mph below your safe speed.
Apply stronger pressure as the vehicle goes downhill.
Apply light, steady pressure.

Which of these statements about downshifting for a long downhill grade is TRUE?

Downshifting should not be done with automatic transmissions.
The proper time to downshift is just after the vehicle starts down the hill.
Downshifting allows engine compression and friction to help the brakes slow the vehicle.

Which of these statements about driving in bad weather is FALSE?

Driving conditions become more dangerous as the temperature rises to the point that ice begins to melt.
As rain continues, the road becomes more slippery than it was when the rain began.
When the temperature drops, bridges will freeze before roadways.

Which of these statements about backing large vehicles is TRUE?

You should avoid backing whenever you can.
Helpers should be out of sight and use only spoken signals to communicate with the driver.
It's safer to back toward the right side of the vehicle.

Which of these statements about engine belts in hot weather is FALSE?

Cracking is likely to occur, but it is not a safety threat.
You can check the tightness of belts by pressing on them.
Loose belts will not turn the water pump and/or fan on properly.

Which of the following is correct?

Brake shoes should not be worn dangerously thin.
Brake shoes should have the same thickness as a penny.
Brake shoes on the steering axle should be larger than a quarter.

Which of these statements is true about medicines used to treat the common cold?

They should only be used when driving during the daytime.
They often make you sleepy. Therefore, they should not be used while driving.
They can be used while driving if you only take half the regular dose.

Which of the following is NOT a type of retarder?

Electric
Hydraulic
Robotic

Which of these statements is true about speed management?

Shady parts of the road allow better traction than open areas.
Road surfaces will freeze before bridges.
On slippery roads, it takes longer to stop, and it is harder to turn without skidding.

Which of these is a good thing to do when driving at night?

Drive slowly enough to stop within the range of your headlights.
Look directly at oncoming headlights only briefly.
Keep your instrument lights bright.

As part of your pre-trip inspection, you must check for:

overloads.
poorly balanced weight.
Both of these need checked.

Which of these statements about cold-weather driving is TRUE?

An engine cannot overheat when the weather is very cold.
Exhaust system leaks are less dangerous in cold weather.
Windshield washer antifreeze should be used.

Which of the following provide extra gears on some trucks?

Auxiliary transmissions.
Multi-speed rear axles.
Both of these.

Which of these statements about cargo loading is true?

State laws dictate legal weight limits.
If the shipper loads the cargo, the driver is not responsible for overloading.
The legal maximum weight allowed by a state can be considered safe for all driving conditions.

Which of these statements is true about brakes?

Brake fade is not caused by heat.
Brakes absorb more heat to stop heavier vehicles.
Brake drums cool very quickly when the vehicle is moving very fast.

When steering to avoid a crash, you should:

Not turn any more than necessary to clear what is in your way.
Steer with one hand so that you can turn the wheel more quickly.
Apply the brakes while turning.

Which of these is NOT caused by rough acceleration?

Mechanical damage.
Damage to the coupling.
Tire damage.

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?

Leaving the road is riskier than hitting another vehicle.
To miss an obstacle, you can almost always turn more quickly than you can stop.
Stopping is always the safest action in a traffic emergency.

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.
Sleep is the only thing that can overcome fatigue.
There are drugs that can overcome fatigue.

Which of these is NOT a proper use of vehicle lights?

Flashing your brake lights to stop someone from tailgating.
Flashing your brake lights to warn someone behind you that you are slowing down.
Turning on your headlights during times when visibility is reduced.

You are driving on a straight, level highway at 50 mph. There are no vehicles in front of you. Suddenly a tire blows out. What should you do first?

Stay off the brakes until the vehicle slows down on its own.
Begin light braking.
Begin controlled or stab braking.

Which of the following statements about vehicle fires is true?

Poor trailer ventilation can cause flammable cargo to catch fire.
Underinflated tires will NOT cause a vehicle fire.
Carrying a properly charged fire extinguisher will help prevent fires.

General Knowledge6 (Drivingtests.org)

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