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Free CHMP Practice Questions

10 free, exam-style Certified Hazardous Materials Practitioner (CHMP) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CHMP practice test to study every exam domain.

The CHMP exam has 120 questions and runs 3 hours.

These 10 free CHMP questions are organized by exam domain, so you can see how each part of the Certified Hazardous Materials Practitioner blueprint is tested. Reveal the answer and explanation under each question.

Domain 1: Identification, Handling, and Transport of Hazardous Materials 35.58% of exam

Question 1

A manufacturing facility generates 1,200 kg of hazardous waste in a single calendar month. Under the federal RCRA generator standards, how is the facility classified, and what is its maximum on-site accumulation time without a permit?

  1. Large quantity generator; 90 days
  2. Small quantity generator; 180 days
  3. Large quantity generator; 180 days
  4. Very small quantity generator; no federal accumulation time limit
Show answer & explanation

Correct answer: A - Large quantity generator; 90 days

Question 2

A laboratory discards an aqueous solution measured at a pH of 12.8. Based solely on this property, which RCRA characteristic does the waste exhibit, and what is the corresponding EPA waste code?

  1. Reactivity, D003
  2. Ignitability, D001
  3. Corrosivity, D002
  4. Toxicity, D004
Show answer & explanation

Correct answer: C - Corrosivity, D002

Question 3

A shipper offers 1,500 lb (aggregate gross weight) of a Class 8 (corrosive) material - a Table 2 hazard class - for transport by highway. Is a placard required?

  1. Yes; the 1,001 lb aggregate gross weight threshold is exceeded
  2. No; Class 8 corrosives are exempt from highway placarding requirements
  3. Yes, but only if at least one individual package in the load exceeds 1,001 lb on its own
  4. No; placards become mandatory only at or above 5,000 lb
Show answer & explanation

Correct answer: A - Yes; the 1,001 lb aggregate gross weight threshold is exceeded

Question 4

Workers will be engaged in cleanup operations at an uncontrolled hazardous waste site, with the potential for exposure to hazardous substances above permissible limits. What initial HAZWOPER training must they complete before starting work?

  1. 8 hours of refresher training, completed annually thereafter
  2. 24 hours of instruction plus 1 day of supervised field experience, as for occasional site workers
  3. 40 hours of classroom instruction only, with supervised field experience not required
  4. 40 hours of off-site instruction plus 3 days of supervised field experience
Show answer & explanation

Correct answer: D - 40 hours of off-site instruction plus 3 days of supervised field experience

Domain 2: Management of Emergencies & Incidents 18.46% of exam

Question 5

During the response to a chemical release, conditions at the scene become an imminent danger to responders. Within the Incident Command System, which position carries the specific authority to immediately alter, suspend, or terminate the unsafe operation?

  1. Operations Section Chief
  2. Safety Officer
  3. Logistics Section Chief
  4. Public Information Officer
Show answer & explanation

Correct answer: B - Safety Officer

Question 6

A facility experiences a spill of a hazardous substance in a quantity equal to its CERCLA reportable quantity (RQ). Which notification does federal law require be made immediately?

  1. A written report to the state environmental agency, due within 30 days of the spill
  2. Notification to the OSHA Area Office having jurisdiction
  3. Notification to the National Response Center
  4. A formal petition submitted to the EPA Administrator in Washington, D.C.
Show answer & explanation

Correct answer: C - Notification to the National Response Center

Domain 3: Sampling and Analysis of Hazardous Materials/Waste 15% of exam

Question 7

A site technician uses a combustible gas meter (CGM) to assess a potentially flammable atmosphere before entry. The instrument's reading is expressed as:

  1. Parts per million (ppm) of the specific gas present
  2. Percent of the lower explosive limit (LEL)
  3. Milligrams per cubic meter (mg/m3)
  4. Percent oxygen by volume
Show answer & explanation

Correct answer: B - Percent of the lower explosive limit (LEL)

Domain 4: Site Investigation and Remediation 14.04% of exam

Question 8

A site safety plan must specify the correct level of personal protective equipment. What is the PRIMARY difference between EPA Level A and Level B protection?

  1. Level A adds gas-tight total encapsulation, while respiratory protection is equivalent for both
  2. Level A relies on an air-purifying respirator, whereas Level B relies on a self-contained breathing apparatus
  3. Level B provides a meaningfully higher degree of respiratory protection than Level A does
  4. Level A is reserved for known contaminants, and Level B is used only for unknown atmospheres
Show answer & explanation

Correct answer: A - Level A adds gas-tight total encapsulation, while respiratory protection is equivalent for both

Domain 5: Program and Project Management 16.92% of exam

Question 9

Under the OSHA Hazard Communication Standard's adoption of GHS, a chemical label must bear a signal word. Which signal word is used to indicate the MORE severe hazard category?

  1. Caution
  2. Notice
  3. Warning
  4. Danger
Show answer & explanation

Correct answer: D - Danger

Question 10

An employer must keep its hazmat employees' transportation training current. Under the U.S. DOT Hazardous Materials Regulations, recurrent training is required at least once every:

  1. Year
  2. 2 years
  3. 3 years
  4. 5 years
Show answer & explanation

Correct answer: C - 3 years

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