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Question:

How often should you check the tires on a placarded trailer that has dual tires?

Answer: Start of each day and every time you stop

Explanation
If you have a trailer with placards and dual tires, you should check your tires at the beginning of each day and each time that you stop for any reason, whether that's for a rest or to refuel. Remember that you must use a tire pressure gauge to get an accurate reading.
This question is in Section 2: Hazmat & Passenger Vehicles of our CDL Test Guide. Explore now!
Related Question

Question: What parts of the bus interior must you check prior to driving?

1. Handholds and railings

2. Floor coverings

3. Restroom emergency buzzers

4. All of the above

All of the above

Sometimes people damage unattended buses. Make sure your passengers don't trip, fall, and aren't left unable to call for help by checking the bus interior every time you drive it.

Question: You hear a noise which sounds like a tire blowout. However, neither your handling nor ride height seem affected. What should you do?

Stop and check anyway

If you blow a dual tire, you may not necessarily notice a difference in handling immediately. However, the long-term effects of leaving a blown tire may be catastrophic. A minute to get out and check, if you have any suspicions, could save your life.

Question: When driving at night, you should:

Adjust your speed to keep your stopping distance within your sight distance.

Question: A placarded vehicle must carry what type of fire extinguisher?

One with a rating of 10 B:C minimum

All placarded vehicles are required to have a fire extinguisher certified by the Underwriters Laboratory (often written as UL) to put out a minimum 10 square feet of a class B fire, which includes almost all flammable liquids, and is non-conducive due to its C rating.

Question: Out of all spaces around your bus the most important one is

To the front

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