CHST Exam Practice Questions with Complete
Answers
Which of the following is NOT considered a significant factor in determining the outcome of an
electrocution event? - ANSWER 1. The amount of electrically resistant material present in work
boots and work gloves.
A Noise-Hazard Control Program (and associated Hearing Conservation Program) is required
under OSHA regulation 29 CFR 1910.95 (Occupational Noise Exposure) where workers may be
exposed to noise levels in excess of an eight -hour-time-weighted average of.. - ANSWER 2. 85
decibels (dB)
As per 29 CFR 1910.1001, the allowable eight-hour exposure limit concentration to asbestos
fibers is not to exceed which of the following? - ANSWER 3. 0.1 fibers per cm^3 of air
Per OSHA regulations 29 CFR 1910.25-1910.27, the maximum length a single ladder or a single
section of ladder may be is.. - ANSWER 4. No greater than 30 feet
Which of the following is NOT stipulated as a hazardous waste material attribute to which the
U.S. Environmental Protection Agency extends a designated waste code (e.g., #D001), as per 40
CFR 261, Subpart C? - ANSWER 5. Mutagenicity
In a construction environment, which of the following types of PPE is most suitable for
protecting the eyes against airborne dust? - ANSWER 6. Safety goggles
At what minimum frequency must electrical-insulating gloves be tested to ensure they
adequately protect workers against electrical shock? - ANSWER 7. Every six months
The most useful tool that CHST's can potentially use for evaluating system safety levels at
smaller-scale worksites is a(n): - ANSWER 8. Job Safety Analysis (JSA)
,If 25 or more employees are to be working unserground at the same time, which of the
following safety procedures MUST be in effect? - ANSWER 9. Two separate rescue teams must
be available. One within 30 minutes travel and the second within two hours travel
If a five-foot deep trench is dug in clay material, what angle must the trench wall not exceed? -
ANSWER 10. 53 degrees
"Lifting Index" (LI) is calculated per which of the following? - ANSWER 11. Load weight /
recommended weight limit
"Flash Point" is most accurately defined as which of the following? - ANSWER 12. The lowest
temperature at which a flammable liquid can form an ignitable mixture in air
Which of the following does a mobile crane operator NOT need to be aware of in order to
ensure a safe lift? - ANSWER 13. The width of the jib
To what part of the body does a body harness typically NOT distribute any significant fall-arrest
force? - ANSWER 14. Lower back
" Recommended weight limit" (RWL) is most accurately defined as which of the following? -
ANSWER 15. The weight that healthy workers could lift for up to eight hours without causing
injuries
The Heinrich "incident to injury ratio" model states that for every 330 accidents,---- result in no
injuries, ---- cause minor injuries, and ---- cause major injuries. - ANSWER 16. 300,29,1
Which of the following is regarded as the "three E's of safety"? - ANSWER 17. Engineering,
Education, Enforcement
Total case incident rate ( TCIR) is calculated via which of the following? - ANSWER 18. (Number
of recordable injuries per year x 200,000) / (total hours worked)
, Which type of incident usually accounts for the highest fatality rate in the construction
industry? - ANSWER 19. Falls
According to OSHA regulation 29 CFR 1926.651, a Stairway, ladder, ramp, or other safe means
of egress shall be locate in trench excavations that are---- feet or more in depth. - ANSWER 20.
Four feet
Excavation cave-in protection is ALWAYS required when which of the following conditions are
met? - ANSWER 21. The excavation mainly comprises of clay or silt, and is greater than five feet
in depth
What level of electrical current is enough to potentially result in death? - ANSWER 22. 75
milliamperes. ----10 milliamperes will cause painful to severe shock but death usually does not
occur below 75 milliamperes.
Which of the following types of construction equipment can NOT make inadvertent contact
with overhead power lines? - ANSWER 23. Bulldozers
Which of the following is NOT a recommended course of action for preventing falling -object
injuries to workers below a scaffold? - ANSWER 24. A safety buffer zone of 12 feet around the
perimeter of a scaffold, for every 10 feet of elevation, should be employed while the scaffold is
in use.
Per OSHA regulation 29 CFR 1926.502, when a 200 pound load is applied in a downward
direction to the top of the edge of a guardrail , it shall not deflect to a height any less than ----
above the walking or working level. - ANSWER 25. 39 Inches
Which of the following is NOT a type of welding? - ANSWER 26. Modules welding ----the three
common types are oxygen-fuel gas welding , Arc Welding, Resistance welding.
Answers
Which of the following is NOT considered a significant factor in determining the outcome of an
electrocution event? - ANSWER 1. The amount of electrically resistant material present in work
boots and work gloves.
A Noise-Hazard Control Program (and associated Hearing Conservation Program) is required
under OSHA regulation 29 CFR 1910.95 (Occupational Noise Exposure) where workers may be
exposed to noise levels in excess of an eight -hour-time-weighted average of.. - ANSWER 2. 85
decibels (dB)
As per 29 CFR 1910.1001, the allowable eight-hour exposure limit concentration to asbestos
fibers is not to exceed which of the following? - ANSWER 3. 0.1 fibers per cm^3 of air
Per OSHA regulations 29 CFR 1910.25-1910.27, the maximum length a single ladder or a single
section of ladder may be is.. - ANSWER 4. No greater than 30 feet
Which of the following is NOT stipulated as a hazardous waste material attribute to which the
U.S. Environmental Protection Agency extends a designated waste code (e.g., #D001), as per 40
CFR 261, Subpart C? - ANSWER 5. Mutagenicity
In a construction environment, which of the following types of PPE is most suitable for
protecting the eyes against airborne dust? - ANSWER 6. Safety goggles
At what minimum frequency must electrical-insulating gloves be tested to ensure they
adequately protect workers against electrical shock? - ANSWER 7. Every six months
The most useful tool that CHST's can potentially use for evaluating system safety levels at
smaller-scale worksites is a(n): - ANSWER 8. Job Safety Analysis (JSA)
,If 25 or more employees are to be working unserground at the same time, which of the
following safety procedures MUST be in effect? - ANSWER 9. Two separate rescue teams must
be available. One within 30 minutes travel and the second within two hours travel
If a five-foot deep trench is dug in clay material, what angle must the trench wall not exceed? -
ANSWER 10. 53 degrees
"Lifting Index" (LI) is calculated per which of the following? - ANSWER 11. Load weight /
recommended weight limit
"Flash Point" is most accurately defined as which of the following? - ANSWER 12. The lowest
temperature at which a flammable liquid can form an ignitable mixture in air
Which of the following does a mobile crane operator NOT need to be aware of in order to
ensure a safe lift? - ANSWER 13. The width of the jib
To what part of the body does a body harness typically NOT distribute any significant fall-arrest
force? - ANSWER 14. Lower back
" Recommended weight limit" (RWL) is most accurately defined as which of the following? -
ANSWER 15. The weight that healthy workers could lift for up to eight hours without causing
injuries
The Heinrich "incident to injury ratio" model states that for every 330 accidents,---- result in no
injuries, ---- cause minor injuries, and ---- cause major injuries. - ANSWER 16. 300,29,1
Which of the following is regarded as the "three E's of safety"? - ANSWER 17. Engineering,
Education, Enforcement
Total case incident rate ( TCIR) is calculated via which of the following? - ANSWER 18. (Number
of recordable injuries per year x 200,000) / (total hours worked)
, Which type of incident usually accounts for the highest fatality rate in the construction
industry? - ANSWER 19. Falls
According to OSHA regulation 29 CFR 1926.651, a Stairway, ladder, ramp, or other safe means
of egress shall be locate in trench excavations that are---- feet or more in depth. - ANSWER 20.
Four feet
Excavation cave-in protection is ALWAYS required when which of the following conditions are
met? - ANSWER 21. The excavation mainly comprises of clay or silt, and is greater than five feet
in depth
What level of electrical current is enough to potentially result in death? - ANSWER 22. 75
milliamperes. ----10 milliamperes will cause painful to severe shock but death usually does not
occur below 75 milliamperes.
Which of the following types of construction equipment can NOT make inadvertent contact
with overhead power lines? - ANSWER 23. Bulldozers
Which of the following is NOT a recommended course of action for preventing falling -object
injuries to workers below a scaffold? - ANSWER 24. A safety buffer zone of 12 feet around the
perimeter of a scaffold, for every 10 feet of elevation, should be employed while the scaffold is
in use.
Per OSHA regulation 29 CFR 1926.502, when a 200 pound load is applied in a downward
direction to the top of the edge of a guardrail , it shall not deflect to a height any less than ----
above the walking or working level. - ANSWER 25. 39 Inches
Which of the following is NOT a type of welding? - ANSWER 26. Modules welding ----the three
common types are oxygen-fuel gas welding , Arc Welding, Resistance welding.
