Electrical Capstone
Section 430.32 of the National Electric Code States that a motor must be protected up to____% of its FLC Rating.
125
14 gauge NM-B cable has a maximum current rating of _______ amps.
15
Circuits which provide switchboards with pilot lights are required to be protected by standard overcurrent devices rated at ___ A or less
15
According to OSHA safety regulations, load carrying timber members must be a minimum of ___________ lb-f/in squared construction grade lumber.
1500
According to OSHA safety regulations, platforms must be at least _____in. wide or guardrails and personal fall arrest systems must be used..
18
When there is a break in elevation of ____________ or more and no ramp, runway, embankment or personnel hoist is available, employers must provide a stairway or ladder at all worker points of access.
19 inches
Any place there is a break in elevation of _____________, a stairway, ladder, or ramp, shall be provided.
19in
For purposes of receptacle spacing, the Code requires that an individual wall space shall be considered to be ____ or more in width.
2 feet
How many outside receptacles, accessible at grade level, are required for a single-family dwelling?
2 receptacles
12 gauge NM-B cable has a maximum current rating of _______ amps.
20
Handrails shall be capable of withstanding ______ pounds of downward force.
200
Cables and raceways installed under streets, highways, roads, driveways, and parking lots shall be buried to a minimum depth of ___ ².
24
Double-cleated ladders or two or more ladders must be provided when ladders are the onlyway to enter or exit a work area where _____ or more employees work or when a ladder servessimultaneous two-way traffic.
25
Each step or rung of a fixed ladder must be able to support a load of at least _____ poundsapplied in the middle of the step or rung.
250
On a blueprint scale of 1/8 inch = 1 foot, a 3 1/2 inch length represents ______ ft.
28
Permanent handrails are to have clearance of ________ inches between the rail and wall.
3
When portable ladders are used for access to an upper landing surface, the side rails must extend at least _____ feet above the upper landing surface.
3
Whenever service conductors are installed as open conductors, a clearance of ___ feet shall be provided from windows, doors, or similar locations.
3
Toe boards on scaffolding must be _____ inches tall, and no more than ____ inches above the surface of the floor.
3.5, .25
Handrails must be between ____________ in height.
30-37 inches
According to OSHA safety regulations, guardrails/toprail on scaffold platforms must be between ________ inches and _______ inches.
38,45
According to OSHA safety regulations, scaffolds must be able to support up to ____ times the intended load.
4
Portable Ladders must capable of supporting the following loads without failure.
4 times the maximum intended load.
An inductor is connected to a 120-V, 60-Hz supply. The current in the circuit is 2.4 A. What is the inductive reactance?
50 ohms
According to OSHA safety regulations, suspension scaffold rigging must be able to support up to ____ times the intended load.
6
The minimum amount of wire that should be left in a workbox is _______ inches.
6
Receptacles are required to be installed so that no point along the floor line in any wall space is more than ______ from an outlet in that space.
6 feet
A 240 volt, single-phase, 30 ampere-rated, electric clothes dryer will have a VA rating of ____.
7,200
A ground rod is required to be driven a MINIMUM of ____ feet into the soil.
8
Per 230.24(A), overhead service conductors shall have a minimum verticle clearance of not less than ___ feet above rooftops.
8
A ground rod must be a minimum of _____ in length.
8 feet
When extinguishing a fire involving wood framing or cardboard boxes, a ____________ fire extinguisher should be used.
Class A
When extinguishing a fire involving diesel fuel, a ____________ fire extinguisher should be used.
Class B
When extinguishing a fire involving an electrical appliance, a ____________ fire extinguisher should be used.
Class C
When extinguishing a fire involving a metal frame structure, a ____________ fire extinguisher should be used.
Class D
When extinguishing a fire involving cooking grease, a ____________ fire extinguisher should be used.
Class K
What symbol represents current?
I
What is the difference between inching and jogging?
Inching is accomplished by momentarily applying reduced voltage to the motor and jogging is accomplished by momentarily applying full voltage to the motor.
Article 90 of the National Electric Code Covers
Introduction
A receptacle is installed outdoors on the porch of a dwelling unit. The receptacle is located such that it is near the open railing of the porch, but it is at a height of 7 feet above grade level. Which of the following best describes Code requirements for installation of this receptacle?
It must be GFCI protected as it is outside
The National Electric Code is based on
NFPA
What agency requires employers to provide a workplace free of recognized hazards for its employees?
OSHA
The proper angle for setting up a ladder is to place the base a/an ________ of the working length of the ladder from the wall or vertical surface.
Quarter
Article 110 of the National Electric Code Covers
Requirements for Electrical Installations
Which of the following is true concerning the National Electrical Code?
The NEC is not a law unless it is adopted as law by a local authority.
What does a dashed line drawn between components represent?
They are mechanically connected together so that both will operate at the same time.
"Scaffolds where platforms are overlapped to create a long platform, the overlap shall occur only over supports, and shall not be less than 12 inches (30 cm) unless the platforms are nailed together or otherwise restrained to prevent movement."
True
What symbol represents voltage?
V
What is the unit of potential difference?
Volt
The symbol for capacitive reactance is
XC
Electrical outlet box installed in walls and ceilings are required to be _____.
accessible
Stairways with at least 4 risers, rising more than 30 inches are to be equipped with;
at least one handrail on each unprotected side
What are two types of thermal overload relay?
bimetal strip type and solder melting type
Fuses and ___ are OCPDs designed to automatically stop the flow of current in a circuit that has a short circuit or is overloaded.
circuit breakers
A Class A GFCI is a device that trips when the __ to ground has a value of 4mA to 6mA.
current
The flow of electrons is called _________
current
What happens to current when resistance increases?
decrease
Article 100 of the National Electric Code Covers
definitions
A GFCI
detects a difference in current between the black and white wires.
All portable and semi-portable tools must be grounded unless they are;
double insulated
Lockout Tagout devices must be
durable
A motor is a dynamo that used to change
electrical energy into mechanical energy.
According to OSHA safety regulations, platforms must be_______.
fully planked
What does the 12 in NM-B 12/3 stand for?
gauge
The neutral conductor is also referred to as the _____ conductor.
grounded
A grounding conductor is the conductor that connects electrical equipment or the grounded conductor to the ___
grounding electrode
What happens to current when voltage increases?
increases
The symbol X L stands for
inductive reactance
Overload relays can be classified as thermal or
magnetic
A person with a serious electrical injury should be moved
only if in immediate danger
The service ___ is the point of connection between the local electrical utility company and the premises wiring of the building or structure.
point
A motors _________ determines what proportion of the total electrical power is active power and what proportion is reactive power.
power factor
A GFCI
protects people from electrical shock
A(n) ___ is an enclosed channel of metal or nonmetallic materials used to contain the wires or cables of an electrical system
raceway system
The National Electric Code is based on
removed without damage to the building.
How many current sensing devices are required by the National Electrical Code to protect a three-phase motor operated on 480 volts?
three
S3 is the symbol for a
three way switch
A GFCI
trip in 1/40th of a second.
All 15 A and 20 A, 125 V receptacles installed in patient care areas of pediatric wards, rooms, or other areas shall be listed tamper-resistant or shall employ a listed tamper-resistant cover.
true
All receptacles in dwelling crawl spaces at or below grade shall be GFCI-protected.
true
All receptacles installed in dwelling bathrooms shall be GFCI-protected.
true
All receptacles which serve countertops in dwelling kitchens shall be GFCI-protected.
true
Conductors of different systems (600 V or less, AC and DC) may occupy the same raceway.
true
Conductors used for direct burial shall be identified for such use.
true
THW conductors are permitted to be installed in wet locations.
true
The neutral of an electrical system is always carrying the unbalanced current of that system.
true
Each kitchen is required to have a minimum of ____ small appliance branch circuit(s).
two
One way to protect workers from electrical shock is to
use insulated tools and/or coverings.
Ground Fault Interrupter circuits are normally used in _______
wet locations and construction sites
What wire can be used as a hot wire if marked with 3 black stripes on each end?
white
Bored holes through wood members must __________ from the edge.
1 1/4
Holes that are drilled into framing members to permit the installation of raceways or cables shall be at least ___ ² from the nearest edge of the wood member.
1 1/4
Cables or raceways in notches of framing members shall be protected from nails or screws by a steel plate at least ___ ² thick.
1/16
A metal underground water pipe may serve as a grounding electrode if it is in direct contact with the earth for at least ____ feet or more.
10
According to OSHA safety regulations, guardrails or a personal fall arrest system is required for workers on scaffolding ___________ ft. or higher.
10
An electrical circuit has a voltage of 50 V and a resistance of 5 ohms. What is the value of current?
10 A
Service loads to a one-family dwelling require a minimum service disconnect rating of ___A.
100
The minimum size electrical panel for a dwelling is
100 Amp
According to the National Electric Code, Flexible conduit needs to be supported within ____ inches from a junction box or outlet.
12
Service cable shall be secured within _____ of a weather head and meter socket.
12 inches
