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TCFP Hazardous Materials Technician Practice Exam Questions and Correct Detailed Answers, Exams of Safety and Fire Engineering

Texas CareersSafety and Fire Engineering

TCFP Hazardous Materials Technician Practice Exam Questions and Correct Detailed Answers 2025 (Verified Answers) With Rationales

Typology: Exams

2024/2025

Available from 06/18/2025

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TCFP Hazardous Materials Technician Practice
Exam Questions and Correct Detailed Answers
2025 (Verified Answers) With Rationales
1. What is the first priority when responding to a hazardous materials incident?
• Secure the scene
• Perform rescue operations
• Ensure responder safety
• Begin containment procedures
Responder safety is always the highest priority to prevent further casualties or
contamination.
2. The type of PPE that offers the highest level of skin, respiratory, and eye
protection is:
• Level C
• Level B
• Level A
• Level D
Level A suits are fully encapsulated and used in environments where there are
known or suspected high levels of hazardous substances.
3. Which document provides detailed information about the properties and
handling of hazardous chemicals?
• DOT Emergency Response Guidebook
• Safety Data Sheet (SDS)
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TCFP Hazardous Materials Technician Practice

Exam Questions and Correct Detailed Answers

2025 (Verified Answers) With Rationales

  1. What is the first priority when responding to a hazardous materials incident?
  • Secure the scene
  • Perform rescue operations
  • Ensure responder safety
  • Begin containment procedures Responder safety is always the highest priority to prevent further casualties or contamination.
  1. The type of PPE that offers the highest level of skin, respiratory, and eye protection is:
  • Level C
  • Level B
  • Level A
  • Level D Level A suits are fully encapsulated and used in environments where there are known or suspected high levels of hazardous substances.
  1. Which document provides detailed information about the properties and handling of hazardous chemicals?
  • DOT Emergency Response Guidebook
  • Safety Data Sheet (SDS)
  • NFPA 704 marking
  • MSDS label The SDS offers comprehensive information on chemical properties, hazards, safe handling, and emergency measures.
  1. What is the primary method of identifying a hazardous material when container labels are missing?
  • Using detection and monitoring equipment
  • Relying on shipping papers
  • Contacting the manufacturer
  • Assuming the worst-case scenario Detection equipment helps confirm the presence and identity of unknown substances when labels are absent.
  1. Which of the following is NOT a function of a hazardous materials technician?
  • Analyze hazardous materials incidents
  • Plan response operations
  • Act as Incident Commander
  • Implement decontamination procedures Technicians operate under command and do not serve as the Incident Commander.
  1. A BLEVE is most likely to occur with which type of container?
  • Railcar with solids
  • Pressurized liquid tank
  • Non-bulk drum
  • Emergency Recovery Guide The ERG provides critical first-response information for handling hazardous materials incidents.
  1. Which decontamination method involves using water or other liquids to remove contaminants?
  • Dilution
  • Absorption
  • Neutralization
  • Solidification Dilution flushes contaminants away, reducing their concentration.
  1. The type of container most associated with cryogenic liquids is:
  • Drum
  • Tote
  • Dewar flask
  • Cylinder Dewar flasks are insulated containers designed to store and transport cryogenic materials.
  1. What color section in the ERG lists chemicals alphabetically by name?
  • Orange
  • Blue
  • Yellow
  • Green The blue section lists chemicals alphabetically; green is for TIH protective distances.
  1. Which type of chemical reaction can result in a rapid release of energy and possible explosion?
  • Corrosive reaction
  • Oxidation
  • Polymerization
  • Neutralization Uncontrolled polymerization can lead to heat buildup and pressure increase, causing explosions.
  1. What type of container is a "ton container" typically used for?
  • Chlorine gas
  • Crude oil
  • Solvents
  • Propane Ton containers are often used to store compressed toxic gases like chlorine.
  1. A placard with a skull and crossbones indicates:
  • Poison
  • Flammable solid
  • Corrosive
  • Organic peroxide This placard is used to indicate toxic or poisonous substances.
  1. A Technical Decon process should be established:
  • After the incident is over
  • For mass casualties only
  • Flammable gas
  • Poisonous gas
  • Cryogenic gas Class 2.3 represents toxic or poisonous gases.
  1. A flammable liquid has a flash point:
  • Below 140°F
  • Below 100°F
  • Above 200°F
  • At boiling point Flash point under 100°F classifies a substance as a flammable liquid per DOT.
  1. What is the main hazard of anhydrous ammonia?
  • Corrosive only
  • Radioactive
  • Toxic and corrosive
  • Oxidizer Anhydrous ammonia can cause severe respiratory and skin damage.
  1. What is the first step in risk-based response?
  • Site hazard assessment
  • Evacuation
  • Decon setup
  • Donning PPE Technicians begin with a thorough evaluation of the site and materials involved.
  1. What does IDLH stand for?
  • Immediately Dangerous to Life or Health
  • Industrial Designation for Long-term Hazard
  • Internal Department for Local Hazards
  • Immediate Dispersion of Leaking Hazard IDLH refers to atmospheric conditions that would cause death or injury without proper protection.
  1. What is the most accurate method for identifying a chemical?
  • Visual cues
  • Instrumental detection
  • Manual reference
  • Color change paper Instruments like gas chromatographs give the most definitive chemical analysis.
  1. NFPA 704 labels display which types of hazards?
  • Radiological
  • Health, flammability, instability
  • Contamination
  • Environmental NFPA 704 is the "fire diamond" and rates health, flammability, and reactivity.
  1. The “hot zone” is where:
  • Decon occurs
  • Contamination is present
  • IC is located

Strong acids fall below pH 3.

  1. The EPA Level of Protection used during initial entry when substances are unknown:
  • Level C
  • Level B
  • Level A
  • Level D Unknown hazards require full protection initially.
  1. Which organization sets packaging standards for transportation of hazardous materials?
  • FEMA
  • DOT
  • EPA
  • NFPA The Department of Transportation sets federal transportation regulations.
  1. What is a cryogenic liquid?
  • Stored above 100°F
  • Highly flammable
  • Boils below – 130°F
  • Neutral in hazard Cryogens are very cold and pose thermal and asphyxiation risks.
  1. What is the hazard associated with hydrogen sulfide?
  • Oxidizer
  • Toxic gas
  • Flammable liquid
  • Corrosive solid Hydrogen sulfide is highly toxic, with a rotten egg odor.
  1. A “chain reaction” is essential in:
  • Absorption
  • Combustion
  • Dilution
  • Neutralization Combustion is a self-sustaining chain reaction involving fuel and oxygen.
  1. The term “LEL” stands for:
  • Low exposure limit
  • Lower explosive limit
  • Lethal event level
  • Lowest environmental load LEL is the lowest concentration at which a gas can ignite.
  1. Who assumes control of a HazMat incident under ICS?
  • Safety officer
  • HazMat group supervisor
  • Police officer
  • Temperature resistance
  • Weight Suit testing ensures protection from chemical infiltration.
  1. What is “permeation” in PPE?
  • Chemical passes through material at molecular level
  • Splashing over the surface
  • Absorption by outer layer
  • Tearing of the material Permeation is a slow, unseen transfer through suit materials.
  1. When should monitoring continue during a HazMat incident?
  • Initial entry only
  • Until the hot zone is closed
  • Throughout the incident
  • After entry team leaves Monitoring must be continuous to detect changes.
  1. Who is responsible for decontamination procedures?
  • Incident commander
  • Logistics section chief
  • HazMat technician
  • Public information officer Technicians design and carry out decon procedures.
  1. When is secondary contamination most likely?
  • During patient transport
  • During decon
  • Before entry
  • After incident is over Improperly decontaminated victims can expose transport staff.
  1. Absorption involves:
  • Soaking up liquid with solid material
  • Diluting with water
  • Breaking down chemically
  • Sealing container Absorption uses materials like pads or clay to collect liquids.
  1. Which of the following is a flammable gas?
  • Acetylene
  • Carbon dioxide
  • Oxygen
  • Nitrogen Acetylene is highly flammable and explosive.
  1. What is used to detect flammable vapors in the air?
  • Combustible gas indicator (CGI)
  • Photo ionization detector
  • Radiation detector
  • SCBA A CGI measures the concentration of flammable vapors.
  1. Which term best describes the ability of a substance to cause cancer?