CHST Health Hazards and PPE 4

Question 1

A worker is sandblasting a structure coated with lead paint. Which combination of respiratory protection is MOST appropriate?

Accepted Answer

Supplied-air respirator (SAR) in pressure-demand mode

Answer

Supplied-air respirators in pressure-demand mode provide the highest protection factor required for abrasive blasting operations involving lead-containing coatings.

Question 2

According to OSHA's heat illness prevention standard, which environmental condition triggers mandatory acclimatization protocols for new workers?

Accepted Answer

Heat index above 91°F (33°C)

Answer

OSHA guidance recommends acclimatization protocols when the heat index exceeds 91°F, with new workers limited to 20% of normal workload on day one.

Question 3

Which type of hearing protection provides the highest Noise Reduction Rating (NRR) typically available for construction workers?

Accepted Answer

Foam earplugs with NRR 33

Answer

Foam earplugs have the highest NRR ratings available (up to 33 dB) among common hearing protection devices.

Question 4

A construction worker develops redness, itching, and blistering after contact with uncured epoxy resin. This reaction is BEST classified as:

Accepted Answer

Allergic contact dermatitis

Answer

Epoxy resin reactions that involve immune sensitization and occur after repeated exposures are classified as allergic contact dermatitis.

Question 5

What is the OSHA permissible exposure limit (PEL) for respirable crystalline silica in construction?

Accepted Answer

0.025 mg/m³ as an 8-hour TWA

Answer

OSHA's silica standard for construction (29 CFR 1926.1153) sets the PEL at 50 micrograms per cubic meter (0.025 mg/m³ respirable) as an 8-hour TWA.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST Health Hazards and PPE 4