Electrical Theory
A live-dead-live test is used to verify
that a circuit is de-energized
Residential electrical services are grounded by connecting the grounded conductor to a grounding electrode at the
neutral bus in the main panelboard
A PFAS anchorage point for a 6-foot lanyard must be able to hold
5000lbs
An electrical drafting line with a double arrowhead represents.
a Homerun
What is the total resistance in a series circuit with three resistances of 20Ω, 150Ω, and 10Ω.
45 ohms
The load on a branch circuit should not exceed _____% of its rated capacity.
80%
True or False: The neutral conductor is always larger than the ungrounded conductors
False
What is the proper distance from the feet of a straight ladder to the wall?
one-fourth of the working height of the ladder
The symbols T1 T2 and T3 in a typical motor starter schematic represent
Motor Terminals
What is the formula for calculating the total resistance in a series circuit with three resistors is
Rt= R1+R2+R3
If a floor plan of a building is drawn to a scale of 1/8" = 1' - 0", a distance of 1-3/8" on the drawing would equal
11' - 0" on the building itself
Which conductor is grounded on a single phase, three-wire, 120/240V system?
Neutral
Asbestos was banned in ________ ; therefore, you must assume that any facility constructed before ___________has asbestos in it.
1978;1980
Power-riser diagrams are used to show the
arrangement of electric service equipment
Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed current path is
Zero
A conflict between the drawings and the specifications is resolved by
Change Order
Which of the following is an NEC' violation when used as a grounding electrode
What are the minimum and maximum distances (in inches) that a scaffold plank can extend beyond its end support?
6'';12''
True or False: A branch circuit line or drawing that does not have slashes is assumed to have two conductors
True
In a parallel circuit, the voltage across each path is equal to the
applied voltage
Who stated that the current entering a point must equal the total current leaving that point
Kirchhoff
What is used to connect a ground rod with a grounding electrode conductor?
A Grounding Clamp
What applies in a lockout/ tagout procedure?
Lockout/tagout devices are installed by every authorized employee involved in the work
The current MasterFormat® standard covering communications systems is under
Division 27
The number of cycles an alternating electric current undergoes per second is known as
frequency