Which packing group indicates the highest degree of danger among assigned groups?
Correct answer: Packing Group I
Assigned packing groups progress from greater danger in I to lower danger in III.
Source: 49 CFR 172.101(f): Packing Group I indicates the greatest assigned degree of danger ↗
Must a shipper invent a packing group for a Class 2 gas when none is assigned?
Correct answer: No, Class 2 does not have packing groups
A packing-group field is not universally applicable to all hazard classes.
Source: 49 CFR 172.101(f): Class 2 materials do not have packing groups ↗
Why does a hazmat employee need function-specific training?
Correct answer: To learn requirements applicable to the work the employee actually performs
Training must address the employee’s regulated duties, not just general hazard recognition.
Source: 49 CFR 172.704(a)(2): Function-specific training ↗
Which subject belongs in the security-awareness training of a driver who transports hazardous materials?
Correct answer: Recognizing possible security threats and responding appropriately
The training addresses transportation security risks as well as awareness of threats.
Source: 49 CFR 172.704(a)(4): Security-awareness training ↗
Under 49 CFR 172.704, how often must a hazmat employee normally receive recurrent training?
Correct answer: At least once every three years
The normal maximum interval is three years. Required in-depth security training may also be due earlier after the applicable security plan is revised.
Source: 49 CFR 172.704(c)(2): Recurrent training; security-plan revision rule ↗
For an interstate commercial-motor-vehicle operation, what route document must a driver carrying Division 1.1, 1.2, or 1.3 explosives possess and follow?
Correct answer: The required written route plan
The written plan is a required transport document, not a convenience suggestion.
Source: 49 CFR 397.67(d), read with 397.19(c)(3): Written explosives route plan ↗
For an interstate commercial-motor-vehicle operation, for a driver carrying Division 1.1, 1.2, or 1.3 explosives, what must the carrier's written emergency instructions include?
Correct answer: Contacts, the nature of the explosives, and emergency precautions
The instructions address accidents or delays and identify whom to contact, the explosives involved, and precautions for emergencies such as fire or leakage.
Source: 49 CFR 397.19(a)(3): Written explosives accident/delay instructions ↗
Compressed gas leaks after a transport accident. What should you do about bystanders?
Correct answer: Warn bystanders and keep them away from the hazard
Keep uninvolved people away. Only appropriately equipped personnel involved in dealing with the hazard or wreckage should approach; notify the shipper about the accident.
Source: Pennsylvania Commercial Driver's License Manual PUB223(6-26), 9.7.4 Responses to Specific Hazards — Class 2, printed 9-19 (physical PDF page 153) ↗
A radioactive package leaks inside a vehicle. Is removing visible material enough before reusing it?
Correct answer: No; keep it out of service until properly cleaned and checked with radiation-detection equipment
Visible cleanliness does not establish radiological safety. Avoid the material, notify the responsible supervisor, and arrange qualified assessment before the vehicle is returned to appropriate service.
Source: Pennsylvania Commercial Driver's License Manual PUB223(6-26), 9.7.4 Responses to Specific Hazards — Class 7, printed 9-20 (physical PDF page 154) ↗
An infectious-substance package shows damage and leakage before acceptance. What should you do?
Correct answer: Do not accept it; contact the responsible supervisor
Damaged or leaking infectious-material packaging must not simply be put into transport.
Source: Pennsylvania Commercial Driver's License Manual PUB223(6-26), 9.7.4 Responses to Specific Hazards — Class 6, printed 9-20 (physical PDF page 154) ↗
