CDL Passenger Endorsement

Which of the following hazardous materials is a bus permitted to carry?

1. ATear gas devices
2. BAny amount of Division 2.3 poison gas
3. CA large quantity of explosives in the passenger compartment
4. DSmall-arms ammunition labeled ORM-D正确

为什么: Buses may carry small-arms ammunition labeled ORM-D, emergency shipments of drugs or hospital supplies, and small amounts of some other hazardous materials. Buses are prohibited from carrying explosives, poison gas, tear gas, and most other hazardous materials. Never carry hazardous materials unless you are sure the rules allow it.

At a railroad crossing, buses are generally required to:

1. AChange lanes
2. BOnly stop if gates are down
3. CStop, look, and listen before crossing, whether or not a train is coming正确
4. DSpeed up to clear the tracks quickly

为什么: Buses must stop before railroad crossings, generally within 15 to 50 feet of the nearest rail, then look and listen for a train before crossing. Do this even when no train is in sight, unless the crossing is specifically exempt. Never stop on the tracks.