CHST Test Questions with accurate
answers. Latest update, graded A
Which of the following is NOT considered a significant factor in determining the outcome of an
electrocution event? - ✔✔-1. The amount of electrical
...
CHST Test Questions with accurate
answers. Latest update, graded A
Which of the following is NOT considered a significant factor in determining the outcome of an
electrocution event? - ✔✔-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.. - ✔✔-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? - ✔✔-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.. - ✔✔-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? - ✔✔-5. Mutagenicity
In a construction environment, which of the following types of PPE is most suitable for protecting the
eyes against airborne dust? - ✔✔-6. Safety goggles
At what minimum frequency must electrical-insulating gloves be tested to ensure they adequately
protect workers against electrical shock? - ✔✔-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): - ✔✔-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? - ✔✔-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? - ✔✔-10.
53 degrees
"Lifting Index" (LI) is calculated per which of the following? - ✔✔-11. Load weight / recommended
weight limit
"Flash Point" is most accurately defined as which of the following? - ✔✔-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? - ✔✔-13. The width of the jib
To what part of the body does a body harness typically NOT distribute any significant fall-arrest force? -
✔✔-14. Lower back
" Recommended weight limit" (RWL) is most accurately defined as which of the following? - ✔✔-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. - ✔✔-16. 300,29,1
Which of the following is regarded as the "three E's of safety"? - ✔✔-17. Engineering, Education,
Enforcement
Total case incident rate ( TCIR) is calculated via which of the following? - ✔✔-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? - ✔✔-
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. - ✔✔-20. Four feet
Excavation cave-in protection is ALWAYS required when which of the following conditions are met? -
✔✔-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? - ✔✔-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? - ✔✔-23. Bulldozers
Which of the following is NOT a recommended course of action for preventing falling -object injuries to
workers below a scaffold? - ✔✔-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. - ✔✔-25. 39 Inches
Which of the following is NOT a type of welding? - ✔✔-26. Modules welding ----the three common types
are oxygen-fuel gas welding , Arc Welding, Resistance welding.
Which of the following is a common test used to check for cracks in a grinding wheel? - ✔✔-27. The
"Ring Test". ----When a wheel of 10cm in diameter or less is tapped with a non metallic object it will
emit a clear ringing sound if undamaged.
Which of the following soil classifications is correct? - ✔✔-28. Type "B"- Cohesive soil with a moderate
compressive strength.
Soil classifications are A,B,C, and are all cohesive and start with a high compressive strength, and end
with a low compressive strength
Electrical "Bonding" is best defined as: - ✔✔-29. Connecting two or more conductive objects with a
conductor to protect against electrocution
According to OSHA regulation 29 CFR 1910.242, the compressed-air pressure limit for cleaning
operations shall not exceed---- pounds per square inch. - ✔✔-30. 30 pounds per square inch or psi
Which of the following materials or objects is NOT typically used for electrical grounding? - ✔✔-31.
Ventilation ducts---- Building steel, cold water pipes, or ground rods are typically used in the grounding
process
Anchor points for personal fall arrests should be capable of holding---- pounds per person. - ✔✔-32.
5,000 pounds per person
Cranes & Derricks must be clear of power lines by at least ---- feet for voltages up to ---- kV - ✔✔-33. 10
feet for up to 50 kV or killovolts. ---- add 0.4 inches for every kV over 50.
Whose ultimate responsibility is it to ensure that only well-maintained and operable hand and power
tools are utilized on the job site? - ✔✔-34. The Employer
Which of the following is NOT an OSHA-mandated standard for good housekeeping? - ✔✔-35. clear
scrap lumber and associated debris from passageways and stairwells daily----though the material needs
to be cleared there are no clear time intervals prescribed by OSHA
Under current laws for workers' compensation, which of the following is NOT categorized as a potential
injury category? - ✔✔-36. Bilateral---- The four categories are partial,total,temporary, and permanent
When the body's temperature regulation system fails and sweating becomes inadequate, which of the
following heat-related conditions is likely at hand? - ✔✔-37. Heat Stroke
Which of the following is generally NOT regarded by OSHA as a "control method" for preventing work
related injuries. - ✔✔-38. Adherence to the Fair Labor Standards Act (FLSA)---- Control methods would
be PPE, engineering controls, administrative controls.
The ISO 14001 environmental management system is built upon which of the following models? - ✔✔-
39. Plan, do, check, act
Which of the following is NOT a typical characteristic of a "confined space"? - ✔✔-40. It is large enough
for employee to temporarily enter and perform an assigned task without duress. ----Normal
characteristics include: It has limited or restricted entry options, it has a continuous air supply, it is
designed for a brief period of human occupancy.
Which of the following scenarios is indicative of a hazardous atmospheric environment ? - ✔✔-41. A
flammable gas exists at a concentration of 25 percent of its lower flammability limit (LFL)
Properly measuring for excessive heat or cold in the workplace (including workers themselves) could
possibly entail any or all of the following EXCEPT: - ✔✔-42. Requesting that workers initially perform
scouting surveys of an area prior to performing measurements----A worker should never be asked to
enter a potentially adverse area prior to verification that it is safe to do so.
Combustible liquids that are not stored within the confines of a "designated" outside storage area must:
- ✔✔-43. Be completely surrounded by curb structure or enclosure that is equal to or greater than 6
inches in total height
Per OSHA's 29 CFR 1904.6 ( Record-keeping Standard), for how long must a document such as the OSHA
300 log be retained? - ✔✔-44. Five years following the end of the calendar year that the record covers.--
--OSHA 300 log is a record of all reportable injuries in the workplace
The OSHAS 18000 series of occupational health and safety management system standards have the
overarching goal of: - ✔✔-45. Proactively identifying and responding to risk before an accident occurs
A cut-off wheel that has a diameter in the range of 6-12 inches can cut a material with a maximum
thickness of: - ✔✔-46. 1/4 inch---- When you take into account the machine is fully guarded the
thickness is decreased
Per OSHA 29 CFR 1910.1025, the action level for lead(Pb) exposure is 30 micrograms per cubic meter of
air, averaged over an eight hour period. What is the permissible exposure limit? - ✔✔-47. 50
micrograms per cubic meter of air, averaged over eight hours
Training construction employees on the OSHA Hazard Communication Standard is required: - ✔✔-48.
When a new hazardous material is introduced to the workplace----or in conjunction with an employee's
initial assignment to a specific work area
A "tagout" process must be employed when an energy-isolation device is not able to be locked out.
Which of the following is a typical requisite when implementing the "tagout" process? - ✔✔-49. Tags
must be normalized to a consistent size an shape----should be strong enough to prevent inadvertent
detachment and must identify the employee who attached them.
Standards for safety glasses are set by which of the following? - ✔✔-50. The American National
Standards Institute or (ANSI)
Under which of the following incident causal factors would "inadequate/substandard work procedure"
apply? - ✔✔-51. Substandard management or oversight practices
The construction health & safety technician can best identify potential workplace hazards via: - ✔✔-52.
Performing a rigorous worksite analysis
What type of OSHA violation can result in a fine up to 250,000 if an employee death occurs? - ✔✔-53.
Willful violation
When performing safety calculations, especially in regard to potential falls, which of the following
correctly depicts the acceleration of gravity constant? - ✔✔-54. 32.2 ft/sec^2
Pythagorean Theorum - A^2 + B^2 = C^2 - ✔✔-55. Remember!
Which of the following is typically included in a worksite analysis that addresses potential instances of
workplace violence? - ✔✔-56. A worksite security evaluation
A safety intervention is defined as an action to modify how work is conducted with the ultimate goal
being to enhance worker safety and health. Which of the following would NOT be characterized as
prototypical "safety intervention"? - ✔✔-57. Lost time trend evaluations
Per OSHA 29 CFR 1910.23, a "floor-hole" is dimensionally defined as: - ✔✔-58. Between 1 and 12 inches
Per ANSI Standards (ANSI/ASSE A1246.2- Slip Resistance on Walking/Working Surfaces), a coefficient of
friction close to "0" is regarded as: - ✔✔-59. Extremely slipper
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