# General Knowledge Practice Test

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• 1.

### What kind of fire can be put out with water (H2O)?

• A.

Tire

• B.

Electrical

• C.

Fuel

• D.

All of the above

A. Tire
Explanation
Water can be used to put out a tire fire because it is able to cool down the temperature and extinguish the flames. When water is applied to a tire fire, it absorbs heat from the fire, causing the temperature to decrease and eventually extinguishing the flames. This is possible because water has a high heat capacity and can absorb a significant amount of heat energy. Therefore, water is an effective extinguishing agent for tire fires.

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• 2.

### When driving a Commercial Motor Vehicle (CMV), how far ahead should you be looking?

• A.

1/8 mile

• B.

1/4 mile

• C.

1/2 mile

• D.

3/4 mile

B. 1/4 mile
Explanation
When driving a Commercial Motor Vehicle (CMV), it is important to have good visibility and anticipate any potential hazards on the road. Looking 1/4 mile ahead allows the driver to have enough time to react to any sudden changes or obstacles in their path. This distance gives the driver enough time to adjust their speed or change lanes if necessary, ensuring the safety of themselves and other road users.

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• 3.

### When balancing cargo weight, a key factor to remember is to keep the load...

• A.

To the front of your trailer.

• B.

To the rear of your trailer.

• C.

Centered and low.

C. Centered and low.
Explanation
When balancing cargo weight, it is important to keep the load centered and low. This ensures stability and prevents the trailer from becoming top-heavy, which could lead to accidents or loss of control. By keeping the load centered, the weight is evenly distributed, reducing the risk of tipping over. Additionally, keeping the load low helps to maintain the trailer's center of gravity, making it easier to handle and maneuver.

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• 4.

### In normal driving conditions, some driver use the hand valve to try and prevent a jackknife. What should you know about this method?

• A.

Using this method can result in less skidding.

• B.

You should never practice this method.

• C.

It is the best way to brake in a straight line.

• D.

Only experienced drivers should attempt this.

B. You should never practice this method.
Explanation
Using the hand valve to try and prevent a jackknife is not recommended. This method is ineffective and can be dangerous. It does not result in less skidding and is not the best way to brake in a straight line. Additionally, it is not limited to only experienced drivers; all drivers should avoid using this method.

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• 5.

### Brakes can get wet when driving through heavy rain and deep puddles. Water saturated brakes can cause major problems while driving. What should you expect to happen if this happens to you?

• A.

Vehicle pulling to one side.

• B.

Wheels can lock up.

• C.

Limited braking power.

• D.

All of the above.

D. All of the above.
Explanation
When brakes get wet while driving through heavy rain and deep puddles, several problems can occur. The vehicle may pull to one side due to uneven braking force on the wet brakes. Additionally, the wheels can lock up, causing a loss of control over the vehicle. Moreover, the wet brakes may result in limited braking power, making it difficult to slow down or stop the vehicle effectively. Therefore, if brakes get wet in such conditions, all of the mentioned problems can be expected to happen.

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• 6.

### When transporting cargo that can shift, what is the minimum amount of tie-downs you should have in place?

• A.

One (1)

• B.

Two (2)

• C.

Three (3)

• D.

Four (4)

B. Two (2)
Explanation
When transporting cargo that can shift, it is important to secure the cargo to prevent any movement or damage during transportation. Having at least two tie-downs in place ensures that the cargo is properly secured from shifting. This helps maintain stability and prevents accidents or damage to the cargo and the vehicle.

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• 7.

### When testing the parking brake, you should be driving at least 25 miles per hour (mph).

• A.

True

• B.

False

B. False
Explanation
When testing the parking brake, you should not be driving at any speed. The purpose of testing the parking brake is to ensure that it can hold the vehicle in place when it is parked. Testing it while driving at 25 miles per hour would not accurately assess its effectiveness in holding the vehicle stationary. Therefore, the correct answer is False.

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• 8.

### Many drivers on the road are not aware of blind spots and the large braking distance associated with tractor trailers. If you are being tailgated what should you do?

• A.

Increase the space in front of your vehicle.

• B.

• C.

Speed up to increase the distance behind you.

A. Increase the space in front of your vehicle.
Explanation
When being tailgated by another vehicle, it is important to increase the space in front of your own vehicle. This is because tractor trailers have large blind spots and require a longer braking distance. By increasing the space in front of your vehicle, you provide yourself with a buffer zone in case you need to brake suddenly. This can help prevent a potential collision and ensure your safety on the road. Speeding up or tapping your brakes quickly can be dangerous and may not effectively address the issue of being tailgated.

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• 9.

### During a trip, you should inspect your vehicle and it's load when?

• A.

Within the first 25 miles and every 150 miles or three hours thereafter.

• B.

Within the first 100 miles and every 100 miles thereafter.

• C.

After the first 2 hours and every 2 hours thereafter.

• D.

Within the first 50 miles and every 100 miles thereafter.

A. Within the first 25 miles and every 150 miles or three hours thereafter.
• 10.

### The vehicle in front of you has a red triangle with an orange center on the rear. What does this mean?

• A.

That the vehicle is carrying hazardous materials.

• B.

That it is a "Slow Moving Vehicle".

• C.

That the vehicle is carrying an oversized load.

B. That it is a "Slow Moving Vehicle".
Explanation
The red triangle with an orange center on the rear of a vehicle indicates that it is a "Slow Moving Vehicle". This symbol is used to warn other drivers that the vehicle is moving at a slower speed than the surrounding traffic and they should proceed with caution. It is important for drivers to be aware of slow-moving vehicles to prevent accidents and ensure safe driving conditions.

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• Current Version
• Mar 20, 2023
Quiz Edited by
ProProfs Editorial Team
• Jan 05, 2011
Quiz Created by
Cdltest

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