CHST General 3

Question 1

Under OSHA 29 CFR 1926, which of the following is the minimum required height for guardrail systems on construction sites?

Accepted Answer

42 inches

Answer

OSHA 1926.502 requires guardrail systems to be 42 inches (plus or minus 3 inches) in height measured from the walking/working surface.

Question 2

A CHST conducting a job hazard analysis (JHA) for concrete formwork discovers workers may be exposed to silica dust. Which OSHA standard primarily governs silica exposure in construction?

Accepted Answer

29 CFR 1926.1153

Answer

29 CFR 1926.1153 is OSHA's Respirable Crystalline Silica Standard for construction, establishing PELs and required controls.

Question 3

What does the acronym 'PDCA' stand for in the context of safety management systems?

Accepted Answer

Plan, Do, Check, Act

Answer

PDCA (Plan, Do, Check, Act) is the continuous improvement cycle foundational to safety management systems like ANSI/ASSP Z10.

Question 4

When evaluating a construction site's safety program, a CHST finds the experience modification rate (EMR) is 1.35. What does this indicate?

Accepted Answer

The company's workers' comp costs are 35% above industry average

Answer

An EMR above 1.0 indicates a worse-than-average injury history; 1.35 means costs are approximately 35% higher than the industry average.

Question 5

Which type of fire extinguisher is appropriate for energized electrical equipment fires on a construction site?

Accepted Answer

Class C

Answer

Class C extinguishers use non-conductive agents suitable for energized electrical equipment fires.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST General 3