Commercial Driving Passenger Transport 3 — Questions and Answers
Question 1: At what blood alcohol concentration (BAC) is a CDL holder considered legally impaired while operating a commercial passenger vehicle?
- 0.08%
- 0.04% (Correct answer)
- 0.06%
- 0.02%
Correct answer: 0.04%
Federal law sets the CDL impairment threshold at 0.04% BAC — half the standard 0.08% limit — for commercial vehicle operators.
Question 2: What must a bus driver do if a fire breaks out in the engine compartment while passengers are aboard?
- Continue to the nearest repair shop
- Evacuate all passengers immediately and move them away from the bus (Correct answer)
- Use the onboard extinguisher while passengers remain seated
- Call dispatch and wait for instructions
Correct answer: Evacuate all passengers immediately and move them away from the bus
An engine fire requires immediate evacuation of all passengers and moving them well away from the vehicle before attempting any firefighting.
Question 3: Which documents must a CDL passenger endorsement holder carry while on duty?
- Only a standard driver's license
- A valid CDL with the P endorsement and any required medical certificate (Correct answer)
- Any government-issued ID plus insurance card
- A CDL with P endorsement and the company's operating authority permit only
Correct answer: A valid CDL with the P endorsement and any required medical certificate
Drivers must carry a valid CDL bearing the Passenger endorsement plus a current medical examiner's certificate whenever operating a passenger-carrying CMV.
Question 4: How often must a driver operating under hours-of-service rules take a rest break during a shift?
- Every 4 hours
- Every 6 hours
- A 30-minute break is required after 8 consecutive hours of driving (Correct answer)
- A 15-minute break every 3 hours
Correct answer: A 30-minute break is required after 8 consecutive hours of driving
FMCSA hours-of-service rules require a 30-minute off-duty or sleeper-berth break after 8 consecutive hours of driving time.
Question 5: What is the purpose of the interlock system on a bus equipped with a wheelchair lift?
- It locks the steering wheel when the lift is deployed
- It prevents the bus from moving while the lift is in operation (Correct answer)
- It activates hazard lights automatically when the lift is used
- It sounds an alarm if a wheelchair is not secured
Correct answer: It prevents the bus from moving while the lift is in operation
The interlock prevents the bus from moving while the wheelchair lift is deployed, protecting passengers who are boarding or alighting.
Question 6: Which safety system on a motorcoach is designed to keep passengers in their seats during a rollover?
- Seatbelts and head restraints (Correct answer)
- Anti-roll bars only
- Automatic door locks
- Lane departure warning system
Correct answer: Seatbelts and head restraints
Seatbelts and head restraints are the primary occupant-restraint systems designed to keep motorcoach passengers protected during a rollover event.
Commercial Driving Passenger Transport 3
At what blood alcohol concentration (BAC) is a CDL holder considered legally impaired while operating a commercial passenger vehicle?