CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 4

Question 1

Under OSHA's lead standard for construction (29 CFR 1926.62), the action level (AL) for lead exposure is:

Accepted Answer

25 µg/m³ as an 8-hour TWA

Answer

The action level for lead in construction is 25 µg/m³ as an 8-hour time-weighted average, which triggers medical surveillance and monitoring requirements.

Question 2

A contractor is working at heights and must decide between a personal fall arrest system and a positioning device. What is the key functional difference?

Accepted Answer

Personal fall arrest systems stop free falls; positioning devices hold workers in place to work with both hands free

Answer

A personal fall arrest system (PFAS) stops a worker after a free fall begins, while a positioning device keeps the worker supported hands-free at an elevated work position.

Question 3

Which type of fire extinguisher should be used on energized electrical equipment fires?

Accepted Answer

Class C

Answer

Class C fire extinguishers use non-conductive agents and are rated for use on fires involving energized electrical equipment.

Question 4

During a confined space entry on a construction site, the attendant's PRIMARY role is to:

Accepted Answer

Keep track of authorized entrants and initiate rescue procedures without entering

Answer

The attendant must track entrants and initiate rescue (non-entry rescue or emergency services) but must NOT enter the permit space during an emergency.

Question 5

According to ANSI/ISEA Z89.1, which hard hat class provides the highest level of electrical protection?

Accepted Answer

Class E (Electrical)

Answer

Class E hard hats are tested to 20,000 volts and provide the highest level of electrical protection under ANSI/ISEA Z89.1.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 4