1
CHST ACTUAL EXAM STUDY GUIDE / QUESTIONS
AND CORRECT ANSWERS LATEST GUIDE 2025/2026
GRADED A+.
Is a trench considered an excavation? - (answers)Yes
What is the distance a worker needs to maintain from power lines? -
(answers)10ft
What does the severity of electric shock depend on? - (answers)Path of current,
amount of current, duration of exposure
True or false: electrical current as low as 75 milliamps can cause death? -
(answers)True
What are some examples of surcharge loads? - (answers)Spoils pile and equip
being too close to walls
What is the correct extension cord for construction? - (answers)3 wire type
designed for hard or extra hard use
True or false: Exposed metal parts of equipment should be grounded -
(answers)True
How does a gfci protect against electrical shock? - (answers)Detects the
difference in current between the black and white wires
, 2
How can overloaded circuit hazards be controlled? - (answers)Through the use of
electrical protective devices
What are some examples of electrical protective devices? - (answers)Gfcis, fuses,
circuit breakers
What is static electricity? - (answers)An electric charge that cannot move
How wide must the platform of a scaffold be? - (answers)18 inches
The platform of a scaffold must be capable of supporting its weight and
__________ times the maximum load. - (answers)Four
The ropes or wires used in suspension scaffolds must be capable of supporting
______ times the load. - (answers)Six
What should be used to restrain supported scaffold platforms from tipping? -
(answers)Guys, ties, or braces
What is Fall Prevention? - (answers)The process, equipment, and methods used to
actually prevent a fall from occurring.
, 3
What is fall protection? - (answers)The process, equipment, and methods used to
protect a worker once a fall has occurred.
The top edge height of a guardrail should be _________ in. above the
walking/working surface. - (answers)42 +/- 3
What are some common hazards associated with hot work? - (answers)-Health
hazards (air contaminants from welding operations [iron oxide, zinc, beryllium,
copper], burns, burns to the eyes from flashes)
-Physical hazards (tripping from hoses)
-fires and explosions (igniting gases, improper storage)
What are some controls for the hazards created when performing hot work? -
(answers)Protect or remove fire hazards in the area, confine heat, sparks, and
slag, fire extinguishing equipment available, ventilation
What are some common electrical hazards? - (answers)Exposed electrical parts,
overhead power lines, inadequate wiring, defective or damaged cords and wires,
improper use of flexible cords, improper grounding, overloaded circuits
What are some controls utilized for electrical hazards? - (answers)Training,
planning, gfci's, fuses, circuit breakers, lockout tagout
CHST ACTUAL EXAM STUDY GUIDE / QUESTIONS
AND CORRECT ANSWERS LATEST GUIDE 2025/2026
GRADED A+.
Is a trench considered an excavation? - (answers)Yes
What is the distance a worker needs to maintain from power lines? -
(answers)10ft
What does the severity of electric shock depend on? - (answers)Path of current,
amount of current, duration of exposure
True or false: electrical current as low as 75 milliamps can cause death? -
(answers)True
What are some examples of surcharge loads? - (answers)Spoils pile and equip
being too close to walls
What is the correct extension cord for construction? - (answers)3 wire type
designed for hard or extra hard use
True or false: Exposed metal parts of equipment should be grounded -
(answers)True
How does a gfci protect against electrical shock? - (answers)Detects the
difference in current between the black and white wires
, 2
How can overloaded circuit hazards be controlled? - (answers)Through the use of
electrical protective devices
What are some examples of electrical protective devices? - (answers)Gfcis, fuses,
circuit breakers
What is static electricity? - (answers)An electric charge that cannot move
How wide must the platform of a scaffold be? - (answers)18 inches
The platform of a scaffold must be capable of supporting its weight and
__________ times the maximum load. - (answers)Four
The ropes or wires used in suspension scaffolds must be capable of supporting
______ times the load. - (answers)Six
What should be used to restrain supported scaffold platforms from tipping? -
(answers)Guys, ties, or braces
What is Fall Prevention? - (answers)The process, equipment, and methods used to
actually prevent a fall from occurring.
, 3
What is fall protection? - (answers)The process, equipment, and methods used to
protect a worker once a fall has occurred.
The top edge height of a guardrail should be _________ in. above the
walking/working surface. - (answers)42 +/- 3
What are some common hazards associated with hot work? - (answers)-Health
hazards (air contaminants from welding operations [iron oxide, zinc, beryllium,
copper], burns, burns to the eyes from flashes)
-Physical hazards (tripping from hoses)
-fires and explosions (igniting gases, improper storage)
What are some controls for the hazards created when performing hot work? -
(answers)Protect or remove fire hazards in the area, confine heat, sparks, and
slag, fire extinguishing equipment available, ventilation
What are some common electrical hazards? - (answers)Exposed electrical parts,
overhead power lines, inadequate wiring, defective or damaged cords and wires,
improper use of flexible cords, improper grounding, overloaded circuits
What are some controls utilized for electrical hazards? - (answers)Training,
planning, gfci's, fuses, circuit breakers, lockout tagout
