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CHST Construction Safety Exam 2 Questions With Complete Solutions
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CHST Construction Safety Exam 2 Questions With Complete Solutions
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CHST Construction Safety Exam 2 QuestionsWith Complete Solutions
insulate Correct Answers protection around a wire
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isolate Correct Answers to keep out of reach
hh hh
NEC Correct Answers National Electric Company
hh hh
voltage Correct Answers pressure
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amperage Correct Answers flow of electricity
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current Correct Answers electrical movement (measured in
hh hh
amps)
circuit Correct Answers complete path of the current
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resistance Correct Answers restriction to electrical flow
hh hh
conductors Correct Answers substances, like metals, with little
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resistance to electricity that allow electricity to flow
grounding Correct Answers a conductive connection to the
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earth which acts as a protective measure; creates a low-
resistance path from a tool to the earth to disperse unwanted
current
,insulators Correct Answers substances with high resistance to
hh hh
electricity like glass, porcelain, plastic, and dry wood that
prevent electricity from getting to unwanted areas
electrical burns Correct Answers burn from the inside out
hh hh
thermal burns Correct Answers burn from the outside
hh hh
If a power line falls on your car, will you get shocked? Correct hh
Answers No; unless you step out of the vehicle. At the moment,
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the you are at the same potential as the charged power line that
has struck your vehicle. Stepping out will cause you to get
electrocuted.
Severity of shock depends on Correct Answers path of current
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through the body
Severity of shock depends on Correct Answers amount of
hh hh
current flowing through the body (amps)
Severity of shock depends on Correct Answers duration of the
hh hh
shocking current through the body
Low voltage does not mean low hazard Correct Answers hh
Amperage is what kills
hh
Currents above 10 mA Correct Answers can cause paralysis or
hh hh
"freeze" muscles
, Currents above 75 mA Correct Answers can cause a rapid,
hh hh
ineffective heartbeat; death will occur in a few minutes unless a
defibrillator is used
mA Correct Answers milliampere= 1/1,000 of an ampere
hh hh
Burns Correct Answers most common shock-related injury;
hh hh
typically occurs on hands
Control exposed electrical parts Correct Answers isolate
hh hh
electrical parts; use barriers, replace covers, use cabinets or
boxes
Control exposed electrical parts Correct Answers close
hh hh
openings; junction boxes, pull boxes and fittings must have
approved covers; unused openings in cabinets, boxes and fittings
must be closed (no missing knockouts)
Control overhead power lines Correct Answers Stay at least 10
hh hh
feet away
Control overhead power lines Correct Answers Post warning
hh hh
signs
Control overhead power lines Correct Answers Assume that
hh hh
lines are energized
Control overhead power lines Correct Answers Use wood (dry)
hh hh
or fiberglass ladders, not metal
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