When may an emergency roof hatch be left partly open?
- Never, under any conditions at all
- Only while the bus is parked and empty
- Whenever riders ask the driver for it
- For fresh air, though not as a regular practice
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D. For fresh air, though not as a regular practice
Emergency exits must be closed while driving, with one exception: some roof hatches may be locked partly open for fresh air. Do not make a habit of it, and remember the bus's higher clearance with the hatch open.
Reference: AAMVA CDL Manual, Section 4.1
Which tires may NOT be used on the front wheels of a bus?
- Radial tires of any brand
- Recapped or regrooved tires
- Tires with 6/32 inch of tread
- Tires made by two makers
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B. Recapped or regrooved tires
Recapped or regrooved tires are prohibited on the front (steering) wheels of a bus, because a failure there can cost steering control. Tread of 6/32 inch is more than the front-tire minimum.
Reference: AAMVA CDL Manual, Section 4.1; 49 CFR 393.75(d)
When must the red emergency door light on a bus be turned on?
- Only while riders are getting on or off
- At night or whenever outside lights are used
- Only when the emergency door is standing open
- Whenever the bus goes over 35 mph
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B. At night or whenever outside lights are used
If the bus has a red emergency door light, it must work and be switched on at night or any other time the outside lights are in use, so riders can find the exit in the dark.
Reference: AAMVA CDL Manual, Section 4.1