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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.

Question 1

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 2

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

Question 3

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

Question 4

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

Question 5

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

Question 6

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 7

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

Question 8

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

Question 9

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

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

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