Question 1

Which of the following best describes the primary purpose of the Occupational Safety and Health Administration (OSHA) in laboratory environments?

Accepted Answer

To provide a safe workplace by establishing and enforcing regulations and guidelines for worker safety.

Question 2

A laboratory is planning to work with Mycobacterium tuberculosis. Which biosafety level (BSL) and risk group (RG) are most appropriate for handling this organism?

Accepted Answer

BSL-3 and RG3

Question 3

Which of the following is NOT a standard practice in a BSL-1 laboratory?

Accepted Answer

Mandatory use of biological safety cabinets for all procedures

Question 4

A researcher is exposed to a chemical spill in the laboratory. According to ANSI Z358.1-2004, what is the maximum time allowed to reach an eyewash or safety shower after exposure?

Accepted Answer

$$10$$ seconds

Question 5

Which of the following organisms would require handling in a BSL-4 laboratory?

Accepted Answer

Ebola virus

Question 6

A laboratory worker is tasked with disposing of used needles contaminated with biological waste. Which container should be used for this purpose?

Accepted Answer

A puncture-proof sharps container labeled with a biohazard symbol

Question 7

Which agency is responsible for the development of hand hygiene guidelines in healthcare settings?

Accepted Answer

Centers for Disease Control and Prevention (CDC)

Question 8

A laboratory is storing several chemicals, including solvents, oxidizers, and bases. According to best safety practices, how should these chemicals be stored?

Accepted Answer

Separately, with clear labeling according to chemical category

Question 9

Which of the following is a key reason for the use of non-latex gloves in laboratory and healthcare settings?

Accepted Answer

To reduce the risk of allergic reactions among personnel

Question 10

A fire breaks out in a laboratory involving an electrical equipment malfunction. Which type of fire extinguisher should be used?

Accepted Answer

Type C

Question 11

Which of the following best explains why hand washing is considered the most effective method for preventing the spread of infectious diseases in healthcare and laboratory settings?

Accepted Answer

It physically removes pathogens from the skin, reducing person-to-person transmission.

Question 12

A laboratory is working with a virus for which no preventive or therapeutic interventions are available, and which is likely to cause serious or lethal human disease. According to NIH risk group classification, which group does this agent belong to?

Accepted Answer

Risk Group 4 (RG4)

Question 13

Which of the following is a correct step in the PASS method for using a fire extinguisher?

Accepted Answer

Sweep the nozzle back and forth at the base of the fire.

Question 14

A laboratory worker is required to wear a full-face mask with a hood and a self-contained breathing apparatus. Which biosafety level is most likely being used?

Accepted Answer

BSL-4

Question 15

Which of the following is a potential hazard associated with improper use of an autoclave?

Accepted Answer

Thermal burns from superheated steam

Question 16

A laboratory is disposing of broken glassware. Which of the following is the safest and most appropriate method?

Accepted Answer

Place the broken glass in a sturdy, labeled container with a heavy-duty plastic liner.

Question 17

Which of the following best describes the function of a fume hood in a laboratory?

Accepted Answer

To draw ambient air and hazardous vapors away from the operator, reducing inhalation risk.

Question 18

A laboratory worker is exposed to ultraviolet (UV) light during an experiment. What is a potential biological effect of this exposure?

Accepted Answer

DNA dimerization, which can lead to skin cancer.

Question 19

Which of the following is a key feature of a BSL-3 laboratory that distinguishes it from lower biosafety levels?

Accepted Answer

Special exhaust air ventilation systems and sealed windows.

Question 20

A hospital is developing a safety program to comply with federal regulations. Which of the following components is NOT typically included in a hospital safety program?

Accepted Answer

Industrial hygiene and disaster preparation procedures

Laboratory Safety and Biosafety in Microbiology

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