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: PHMSA Hazmat Transportation Requirements: Performance Packaging Codes, packing groups ↗
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: PHMSA Hazmat Transportation Requirements: Performance Packaging Codes, packing groups ↗
Why does a hazmat employee need function-specific training?
Correct answer: To learn requirements applicable to the work they actually perform
Training must address the employee’s regulated duties, not just general hazard recognition.
Source: 49 CFR 172.704(a)(2) ↗
Which topic belongs in required hazmat security-awareness training?
Correct answer: Recognizing possible security threats and appropriate responses
The training addresses transportation security risks as well as awareness of threats.
Source: 49 CFR 172.704(a)(4) ↗
What is the maximum normal interval between recurrent hazmat employee training under this rule?
Correct answer: Three years
Required recurrent training occurs at least every three years; relevant security-plan revisions can trigger earlier training.
Source: 49 CFR 172.704(c)(2) ↗
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: Texas DL-7C, March 2026, section 9, PDF page 126: Explosives route documents ↗
What must carrier-provided emergency instructions for these explosives identify?
Correct answer: Contacts, the explosives involved, and emergency precautions
The instructions prepare the driver for accidents, delays, fires, and leaks.
Source: Texas DL-7C, March 2026, section 9, PDF page 126: Explosives emergency instructions ↗
Compressed gas leaks after a transport accident. What should you do about bystanders?
Correct answer: Warn them and keep them away from the hazard
Only appropriately involved response personnel should approach; notify the shipper about the accident.
Source: Texas DL-7C, March 2026, section 9, PDF page 128: Compressed-gas leak ↗
A radioactive package leaks inside a vehicle. Is removing visible material enough before reusing it?
Correct answer: No, it must be cleaned and checked with a survey meter
Keep clear of the material, notify the responsible supervisor, and require proper assessment before reuse.
Source: Texas DL-7C, March 2026, section 9, PDF page 128: Radioactive contamination ↗
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: Texas DL-7C, March 2026, section 9, PDF page 128: Infectious packages ↗
