CHST - Construction Health and Safety Technician CHST-FREE Construction Health And Safety Technician 1

Question 1

According to OSHA 29 CFR 1926.651, how deep must an excavation be before a competent person is required to classify soil and implement protective systems?

Accepted Answer

5 feet

Answer

OSHA 1926.651 requires that excavations 5 feet or deeper have a protective system (sloping, shoring, or trench box) unless the excavation is in stable rock, and a competent person must classify the soil to determine the appropriate system.

Question 2

Which scaffolding safety requirement under OSHA 29 CFR 1926.451 specifies the minimum load-bearing capacity that supported scaffolds must be capable of supporting?

Accepted Answer

4 times the intended load

Answer

OSHA 1926.451(a)(1) requires supported scaffolds to be capable of supporting without failure their own weight and at least 4 times the maximum intended load applied or transmitted to them.

Question 3

In a construction site safety program, what does the acronym 'SDS' stand for, and which federal agency mandates its use under the Hazard Communication Standard?

Accepted Answer

Safety Data Sheet, mandated by OSHA

Answer

SDS stands for Safety Data Sheet, formerly called MSDS. OSHA's Hazard Communication Standard (29 CFR 1910.1200, applicable to construction via 1926.59) requires manufacturers to provide SDS for hazardous chemicals and employers to make them accessible to workers.

Question 4

Under OSHA's Lockout/Tagout standard (29 CFR 1910.147), what must an authorized employee do AFTER applying a lockout device before performing service or maintenance?

Accepted Answer

Verify that the equipment is de-energized by attempting normal operation or using a test instrument

Answer

After applying lockout/tagout devices and releasing or restraining stored energy, the authorized employee must verify isolation by attempting to operate the equipment using normal controls or by using a test instrument to confirm that hazardous energy has been de-energized.

Question 5

What is the OSHA-required minimum illumination level (in foot-candles) for general construction areas, corridors, hallways, and exit ways on a construction site per 29 CFR 1926.56?

Accepted Answer

5 foot-candles

Answer

OSHA 29 CFR 1926.56 Table D-3 specifies a minimum of 5 foot-candles for general construction areas, corridors, hallways, and exit ways. Higher illumination levels are required for more detailed tasks such as concrete placement (10 fc) and first aid stations (30 fc).

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician CHST-FREE Construction Health And Safety Technician 1