ASCP BOC Qualification in Laboratory
Safety Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of a Material Safety Data Sheet (MSDS)?
A. To provide a chemical’s cost information
B. To describe the chemical’s color and odor
C. To provide information on handling, hazards, and emergency
measures
D. To list all manufacturers of the chemical
C. To provide information on handling, hazards, and emergency
measures
Rationale: MSDSs are designed to inform laboratory personnel about
, proper handling, potential hazards, and emergency procedures for
chemicals.
2. Which class of fire extinguisher should be used on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
C. Class C
Rationale: Class C extinguishers are specifically designed for
electrical fires to prevent electric shock and safely extinguish the fire.
3. What is the first action to take if a corrosive chemical spills on your
skin?
A. Wipe it with a dry cloth
B. Flush immediately with water for at least 15 minutes
C. Apply a neutralizing agent immediately
D. Cover the area with a bandage
B. Flush immediately with water for at least 15 minutes
Rationale: Immediate flushing with copious water is critical to
minimize chemical burns and prevent tissue damage.
4. What is the purpose of a biological safety cabinet (BSC)?
A. To store chemicals safely
B. To contain infectious aerosols and protect personnel
C. To sterilize lab equipment
, D. To measure biological samples accurately
B. To contain infectious aerosols and protect personnel
Rationale: BSCs are designed to provide containment of pathogens
while preventing exposure to laboratory personnel and the
environment.
5. Which type of hazard does the NFPA diamond label use the number 4
to indicate?
A. Minimal hazard
B. Moderate hazard
C. Severe hazard
D. Extreme hazard
D. Extreme hazard
Rationale: In NFPA labeling, a hazard rating of 4 indicates the
material poses a severe or extreme risk under normal conditions.
6. What is the primary purpose of OSHA regulations in the laboratory?
A. To improve laboratory aesthetics
B. To ensure worker safety and reduce occupational hazards
C. To increase laboratory efficiency
D. To regulate laboratory equipment costs
B. To ensure worker safety and reduce occupational hazards
Rationale: OSHA establishes standards to protect workers from
chemical, biological, and physical hazards in the workplace.
, 7. Which of the following is considered a biohazard?
A. Distilled water
B. Escherichia coli O157:H7
C. Sodium chloride
D. Ethanol
B. Escherichia coli O157:H7
Rationale: Biohazards include pathogenic microorganisms capable of
causing disease in humans.
8. Which of the following personal protective equipment (PPE) is
required when handling hazardous chemicals?
A. Gloves and lab coat
B. Sunglasses and sandals
C. Apron and hat only
D. Shoes only
A. Gloves and lab coat
Rationale: Gloves and lab coats provide necessary protection against
chemical splashes and skin contact with hazardous substances.
9. What is the appropriate disposal method for broken glass
contaminated with biological material?
A. Regular trash
B. Sharps container labeled for biohazard
C. Chemical waste container
D. Sink
Safety Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a Material Safety Data Sheet (MSDS)?
A. To provide a chemical’s cost information
B. To describe the chemical’s color and odor
C. To provide information on handling, hazards, and emergency
measures
D. To list all manufacturers of the chemical
C. To provide information on handling, hazards, and emergency
measures
Rationale: MSDSs are designed to inform laboratory personnel about
, proper handling, potential hazards, and emergency procedures for
chemicals.
2. Which class of fire extinguisher should be used on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
C. Class C
Rationale: Class C extinguishers are specifically designed for
electrical fires to prevent electric shock and safely extinguish the fire.
3. What is the first action to take if a corrosive chemical spills on your
skin?
A. Wipe it with a dry cloth
B. Flush immediately with water for at least 15 minutes
C. Apply a neutralizing agent immediately
D. Cover the area with a bandage
B. Flush immediately with water for at least 15 minutes
Rationale: Immediate flushing with copious water is critical to
minimize chemical burns and prevent tissue damage.
4. What is the purpose of a biological safety cabinet (BSC)?
A. To store chemicals safely
B. To contain infectious aerosols and protect personnel
C. To sterilize lab equipment
, D. To measure biological samples accurately
B. To contain infectious aerosols and protect personnel
Rationale: BSCs are designed to provide containment of pathogens
while preventing exposure to laboratory personnel and the
environment.
5. Which type of hazard does the NFPA diamond label use the number 4
to indicate?
A. Minimal hazard
B. Moderate hazard
C. Severe hazard
D. Extreme hazard
D. Extreme hazard
Rationale: In NFPA labeling, a hazard rating of 4 indicates the
material poses a severe or extreme risk under normal conditions.
6. What is the primary purpose of OSHA regulations in the laboratory?
A. To improve laboratory aesthetics
B. To ensure worker safety and reduce occupational hazards
C. To increase laboratory efficiency
D. To regulate laboratory equipment costs
B. To ensure worker safety and reduce occupational hazards
Rationale: OSHA establishes standards to protect workers from
chemical, biological, and physical hazards in the workplace.
, 7. Which of the following is considered a biohazard?
A. Distilled water
B. Escherichia coli O157:H7
C. Sodium chloride
D. Ethanol
B. Escherichia coli O157:H7
Rationale: Biohazards include pathogenic microorganisms capable of
causing disease in humans.
8. Which of the following personal protective equipment (PPE) is
required when handling hazardous chemicals?
A. Gloves and lab coat
B. Sunglasses and sandals
C. Apron and hat only
D. Shoes only
A. Gloves and lab coat
Rationale: Gloves and lab coats provide necessary protection against
chemical splashes and skin contact with hazardous substances.
9. What is the appropriate disposal method for broken glass
contaminated with biological material?
A. Regular trash
B. Sharps container labeled for biohazard
C. Chemical waste container
D. Sink
