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Free CHMM Practice Questions

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

The CHMM exam has 140 questions and runs 3 hours.

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

Domain 1: Planning for Materials with Hazards 10.71% of exam

Question 1

Under RCRA, at what pH values does a waste exhibit the corrosivity characteristic?

  1. pH ≤ 4.0 or pH ≥ 10.0
  2. pH ≤ 3.0 or pH ≥ 11.0
  3. pH ≤ 1.0 or pH ≥ 13.0
  4. pH ≤ 2.0 or pH ≥ 12.5
Show answer & explanation

Correct answer: D - pH ≤ 2.0 or pH ≥ 12.5

Domain 2: Shipping and Transporting Hazardous Waste and Hazardous Materials 10.34% of exam

Question 2

A vehicle is transporting 800 lbs of Class 3 (flammable liquid) and 600 lbs of Class 8 (corrosive). Which placard(s) are required?

  1. Both FLAMMABLE and CORROSIVE placards
  2. Only a FLAMMABLE placard
  3. A DANGEROUS placard
  4. No placards required
Show answer & explanation

Correct answer: C - A DANGEROUS placard

Domain 3: Storing Materials with Hazards 8.50% of exam

Question 3

When a satellite accumulation container reaches the 55-gallon limit, the generator must:

  1. Obtain a RCRA Part B permit and notify EPA within 3 days
  2. Ship the waste off-site within 3 days or obtain storage permit
  3. Leave the container in place and notify EPA within 72 hours
  4. Mark the container with the date and move to generator accumulation area within 3 days
Show answer & explanation

Correct answer: D - Mark the container with the date and move to generator accumulation area within 3 days

Domain 4: Facility Operations Involving Materials with Hazards 9.12% of exam

Question 4

A key difference between Level A and Level B PPE is:

  1. Level A provides vapor-tight protection; Level B provides splash protection
  2. Level A uses SCBA; Level B uses supplied-air respirators
  3. Level A provides chemical protection; Level B provides biological protection
  4. Level A requires full encapsulation; Level B requires partial encapsulation
Show answer & explanation

Correct answer: A - Level A provides vapor-tight protection; Level B provides splash protection

Domain 5: Disposition of Materials with Hazards 8.46% of exam

Question 5

The LDR dilution prohibition means that a generator may NOT:

  1. Combine compatible waste streams for transportation
  2. Dilute hazardous waste to achieve treatment standards
  3. Mix wastes with similar chemical properties
  4. Consolidate wastes to reduce storage volume
Show answer & explanation

Correct answer: B - Dilute hazardous waste to achieve treatment standards

Question 6

Under RCRA, a generator remains liable for its hazardous waste:

  1. Only while the waste is on the generator's property
  2. From cradle to grave
  3. Only until the transporter picks up the waste
  4. Only until accepted by a TSD facility
Show answer & explanation

Correct answer: B - From cradle to grave

Domain 7: Training Personnel 6.50% of exam

Question 7

Under OSHA's HAZWOPER standard, a worker assigned to perform cleanup operations at an uncontrolled hazardous waste site must complete a minimum of:

  1. 8 hours of training
  2. 80 hours of training
  3. 24 hours of training
  4. 40 hours of training
Show answer & explanation

Correct answer: D - 40 hours of training

Domain 11: Environmental Studies 6.35% of exam

Question 8

A Phase I ESA conducted in accordance with ASTM E1527 includes all of the following components EXCEPT:

  1. Collection of soil and groundwater samples
  2. Interviews with property managers, tenants, and regulatory personnel
  3. Visual site inspection and reconnaissance of the subject property
  4. Review of historical records and environmental database searches
Show answer & explanation

Correct answer: A - Collection of soil and groundwater samples

Domain 12: Health and Safety 10.57% of exam

Question 9

Which occupational exposure limit is legally enforceable by OSHA?

  1. IDLH (Immediately Dangerous to Life or Health)
  2. REL (Recommended Exposure Limit)
  3. PEL (Permissible Exposure Limit)
  4. TLV (Threshold Limit Value)
Show answer & explanation

Correct answer: C - PEL (Permissible Exposure Limit)

Question 10

A Process Hazard Analysis (PHA) under PSM must be:

  1. Updated only after a catastrophic incident
  2. Updated and revalidated at least every 5 years
  3. Conducted once and never updated
  4. Conducted only by OSHA inspectors
Show answer & explanation

Correct answer: B - Updated and revalidated at least every 5 years

The rest of the CHMM blueprint

The CHMM exam also covers these domains. Drill them in the full free practice test:

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