CHST CHST - Construction Health and Safety Technician Hazardous Materials and Chemical Safety Questions and Answers 2 — Questions and Answers
Question 1: Under OSHA's asbestos standard for construction (29 CFR 1926.1101), what is the permissible exposure limit (PEL) for asbestos?
- 0.1 f/cc as a 30-min STEL
- 0.1 f/cc as an 8-hr TWA (Correct answer)
- 1.0 f/cc as an 8-hr TWA
- 0.01 f/cc as an 8-hr TWA
Correct answer: 0.1 f/cc as an 8-hr TWA
The OSHA asbestos PEL for construction is 0.1 fiber per cubic centimeter (f/cc) as an 8-hour time-weighted average.
Question 2: Which class of asbestos work under 29 CFR 1926.1101 involves the removal of asbestos-containing thermal system insulation (TSI)?
- Class I (Correct answer)
- Class II
- Class III
- Class IV
Correct answer: Class I
Class I asbestos work involves the removal of thermal system insulation (TSI) and surfacing asbestos-containing material, the highest-risk class.
Question 3: What does RCRA stand for in the context of hazardous waste management?
- Resource Conservation and Recovery Act (Correct answer)
- Regulated Chemical Removal and Assessment
- Risk Control and Remediation Authority
- Restricted Chemical Release Act
Correct answer: Resource Conservation and Recovery Act
RCRA stands for the Resource Conservation and Recovery Act, which governs the management and disposal of hazardous waste in the US.
Question 4: According to OSHA HazCom 2012, signal words used on labels are limited to:
- Caution and Warning
- Warning and Danger (Correct answer)
- Notice, Caution, and Warning
- Danger, Warning, and Caution
Correct answer: Warning and Danger
GHS-aligned HazCom 2012 uses only two signal words: 'Danger' for more severe hazards and 'Warning' for less severe hazards.
Question 5: What is a Threshold Limit Value–Ceiling (TLV-C) as defined by ACGIH?
- The maximum concentration a worker can be exposed to continuously for 8 hours
- A concentration that should not be exceeded at any instant during the workday (Correct answer)
- The highest exposure allowed over a 15-minute short-term period
- The level below which no adverse health effects are expected over a lifetime
Correct answer: A concentration that should not be exceeded at any instant during the workday
A TLV-C is the concentration that should not be exceeded at any moment during the workday, regardless of exposure duration.
Question 6: Which type of air-purifying respirator is appropriate for protection against organic vapors and acid gas hazards?
- N95 filtering facepiece
- HEPA filter cartridge
- Combination OV/acid gas cartridge (Correct answer)
- Powered air-purifying respirator with P100 filters
Correct answer: Combination OV/acid gas cartridge
A combination organic vapor/acid gas cartridge respirator provides protection against both organic solvent vapors and acid gases simultaneously.
CHST CHST - Construction Health and Safety Technician Hazardous Materials and Chemical Safety Questions and Answers 2
Under OSHA's asbestos standard for construction (29 CFR 1926.1101), what is the permissible exposure limit (PEL) for asbestos?