Answer to Question 1A GFCI is a ground-fault circuit interrupter.
Answer to Question 2Ten safety precautions are: (1) Never disconnect or damage any safety device that is provided by the
manufacturer or specified by electrical code; (2) do not touch electrical appliances, boxes, or wiring
with wet hands or feet; (3) do not remove the long ground prong from three-prong 120-volt plugs; (4)
use ground-fault interrupters in kitchen, bathroom, laundry, and outdoor circuits or whenever moisture
may increase shock hazard; (5) immediately discontinue the use of any extension cord that feels warm
or smells like burning rubber; (6) do not place extension cords under carpeting; (7) install all electrical
wiring according to the specifications of the National Electrical Code; (
use only double insulated
portable tools or tools with three-wire grounded cords; (9) if a fuse is blown or circuit breaker is
tripped, determine and correct the problem before inserting a new fuse or resetting the breaker; and
(10) do not leave heat-producing appliances such as irons hair dryers, and soldering irons unattended.
Answer to Question 3A short circuit occurs when electricity flows too rapidly.
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The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1.
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Orange section of the Emergency Response Guidebook (ERG).
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