DOT Hazardous Materials Transportation 3

Question 1

Under 49 CFR 173, what packing group designation indicates the GREATEST danger for a hazardous material?

Accepted Answer

Packing Group I

Answer

Packing Group I (PG I) designates materials presenting the greatest danger and requires the most stringent packaging standards.

Question 2

A vehicle transporting Division 1.3 explosives must keep what minimum distance from other vehicles while stopped for refueling?

Accepted Answer

50 feet

Answer

Vehicles carrying Division 1.3 explosives must maintain at least 50 feet of separation from other vehicles at rest, per 49 CFR 397.7.

Question 3

Which of the following describes an 'overpack' in hazardous materials transportation?

Accepted Answer

An enclosure used to consolidate one or more packages for handling

Answer

An overpack is an enclosure used to consolidate two or more packages into a single unit for ease of handling per 49 CFR 171.8.

Question 4

When transporting poison inhalation hazard (PIH) materials, which placard takes precedence over all others?

Accepted Answer

POISON GAS or POISON INHALATION HAZARD

Answer

PIH placards (POISON GAS or POISON INHALATION HAZARD) always take precedence and must be displayed regardless of other hazard classes present.

Question 5

A DOT inspector finds that a hazmat package's label is obscured by a shipping sticker. What regulation does this violate?

Accepted Answer

49 CFR 172.406 — labels must remain visible and legible

Answer

49 CFR 172.406 requires that hazmat labels remain clearly visible and not be obscured by other markings or attachments during transport.

DOT Inspector Certification Practice Test