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CHST Exam Study Guide Questions With Complete Solutions
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CHST Exam Study Guide Questions With Complete Solutions
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CHST Exam Study Guide Questions WithComplete Solutions
Is a trench considered an excavation? Correct Answers Yes
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What is the distance a worker needs to maintain from power
lines? Correct Answers 10ft
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What does the severity of electric shock depend on? Correct HH
Answers Path of current, amount of current, duration of
HH
exposure
True or false: electrical current as low as 75 milliamps can cause
death? Correct Answers True
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What are some examples of surcharge loads? Correct Answers
HH
Spoils pile and equip being too close to walls
HH
What is the correct extension cord for construction? Correct HH
Answers 3 wire type designed for hard or extra hard use
HH
True or false: Exposed metal parts of equipment should be
grounded Correct Answers True
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How does a gfci protect against electrical shock? Correct
HH
Answers Detects the difference in current between the black
HH
and white wires
How can overloaded circuit hazards be controlled? Correct
HH
Answers Through the use of electrical protective devices
HH
,What are some examples of electrical protective devices?
Correct Answers Gfcis, fuses, circuit breakers
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What is static electricity? Correct Answers An electric charge
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that cannot move
How wide must the platform of a scaffold be? Correct Answers
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18 inches
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The platform of a scaffold must be capable of supporting its
weight and __________ times the maximum load. Correct HH
Answers Four
HH
The ropes or wires used in suspension scaffolds must be capable
of supporting ______ times the load. Correct Answers Six
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What should be used to restrain supported scaffold platforms
from tipping? Correct Answers Guys, ties, or braces
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What is Fall Prevention? Correct Answers The process,
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equipment, and methods used to actually prevent a fall from
occurring.
What is fall protection? Correct Answers The process,
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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. Correct Answers 42 +/- 3
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, What are some common hazards associated with hot work?
Correct Answers -Health hazards (air contaminants from
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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? Correct Answers Protect or remove fire hazards in
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the area, confine heat, sparks, and slag, fire extinguishing
equipment available, ventilation
What are some common electrical hazards? Correct Answers
HH
Exposed electrical parts, overhead power lines, inadequate
HH
wiring, defective or damaged cords and wires, improper use of
flexible cords, improper grounding, overloaded circuits
What are some controls utilized for electrical hazards? Correct
HH
Answers Training, planning, gfci's, fuses, circuit breakers,
HH
lockout tagout
What are some common hazards associated with excavations?
Correct Answers Weight (nearby vehicles/equipment),
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vibration, underground utilities, water and soil erosion.
What is a surcharge load? Correct Answers The spoils pile and
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the equipment being too close to the vertical walls of the trench.
What are some common controls used to mitigate excavation
hazards? Correct Answers Sloping, shoring, shields, rpe
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designed protective systems, soil classification.
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