HT Safety & Chemical Hazards 2

Question 1

Which GHS pictogram indicates a chemical that is an acute toxin (fatal or toxic if swallowed, inhaled, or absorbed through skin)?

Accepted Answer

Skull and crossbones

Answer

The skull and crossbones GHS pictogram designates chemicals with acute toxicity at categories 1–3.

Question 2

When working with osmium tetroxide in the histology lab, which personal protective equipment is MOST critical beyond gloves and a lab coat?

Accepted Answer

Respiratory protection and chemical splash goggles

Answer

Osmium tetroxide vapors are extremely toxic and can permanently damage corneas, making respiratory protection and splash goggles essential.

Question 3

Under OSHA's Hazard Communication Standard, what is the minimum number of sections required in a Safety Data Sheet (SDS)?

Accepted Answer

16

Answer

OSHA's HazCom 2012 standard, aligned with GHS, mandates a standardized 16-section SDS format.

Question 4

A histotechnician notices a sweet, fruity odor in the lab. This odor is MOST likely associated with which solvent?

Accepted Answer

Acetone

Answer

Acetone has a characteristic sweet, fruity odor and is commonly used in histology as a fixative and solvent.

Question 5

Which class of fire extinguisher is appropriate for a flammable solvent (e.g., xylene) fire in the histology lab?

Accepted Answer

Class B

Answer

Class B extinguishers are rated for flammable liquid fires, which include organic solvents like xylene and alcohols.

(HT) Histotechnician Certification Practice Test