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Module 1-3 (EWR 19TH EDITION & DELMAR'S 6TH EDITION)

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EWR AND DELMAR’S
Lonnie Dobyns
Quiz by Lonnie Dobyns, updated more than 1 year ago
Lonnie Dobyns
Created by Lonnie Dobyns about 7 years ago
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Resource summary

Question 1

Question
The open-circuit voltage between the two terminals of a single-pole switch on a lighting circuit when the switch is in the OFF position is
Answer
  • Zero
  • 60
  • 120
  • 240

Question 2

Question
An arc flash can produce temperatures of ________ degrees F
Answer
  • 3500
  • 15000
  • 25000
  • 35000

Question 3

Question
Footwear suitable for electrical work is marked with letters ____
Answer
  • CF
  • EH
  • OSHA
  • PPE

Question 4

Question
For safety, it is very important that electrical equipment be “listed” by the _____
Answer
  • NEC
  • OSHA
  • NRTL
  • ANSI

Question 5

Question
The NEC is revised every ______ years so as to be as up to date as possible.
Answer
  • 2
  • 3
  • 4
  • 5

Question 6

Question
The term APPROVED means to be _______.
Answer
  • listed by a Nationally Recognized Testing Laboratory (NRTL)
  • acceptable to the NEC
  • acceptable to the architect or engineer designing the job
  • acceptable to the authority having jurisdiction

Question 7

Question
As defined in ARTICLE 100, a dwelling unit has the following feature(s)
Answer
  • permanent provisions for living, sleeping, cooking, and sanitation
  • living, sleeping, and basement storage areas
  • space for eating, sleeping and recreation
  • optional garage space

Question 8

Question
All measurements in the NEC are shown in which system(s) of units?
Answer
  • inch-pound (English) only
  • SI (Metric) only
  • both inch-pound and metric values
  • both natural units and physical units

Question 9

Question
In the international system of units, the prefix KILO- means
Answer
  • hundred
  • thousand
  • million
  • billion

Question 10

Question
In the international system of units, the prefix MILLI- means
Answer
  • one hundredth
  • one thousandth
  • one millionth
  • one billionth

Question 11

Question
The NEC defines a "qualified person" as one who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved.
Answer
  • True
  • False

Question 12

Question
Nationally Recognized Testing Laboratories (NRTL) _________ electrical products to provide a basis for approval by inspectors in the field.
Answer
  • approve
  • test and list
  • develop standards
  • endorse

Question 13

Question
The purpose of the NEC code is the practical safe guarding of persons and property from hazards arising from the use of electricity.
Answer
  • True
  • False

Question 14

Question
Always [blank_start]turn off[blank_end] the power before working on an electrical circuit.
Answer
  • turn off

Question 15

Question
Every time an electrician makes a decision concerning the electrical wiring, the decision should be checked by reference to the [blank_start]code[blank_end].
Answer
  • code

Question 16

Question
The AUTHORITY HAVING JURISDICTION over the electrical construction is generally the [blank_start]electrical inspector[blank_end].
Answer
  • electrical inspector

Question 17

Question
The use of the word SHALL indicates a [blank_start]mandatory[blank_end] rule.
Answer
  • mandatory

Question 18

Question
Nationally Recognized Testing Laboratories (NRTL) test and evaluate products for [blank_start]safety[blank_end].
Answer
  • safety

Question 19

Question
What is the smallest part of an element that still retains the properties of that element.
Answer
  • an atom
  • a proton
  • neutron
  • an electron

Question 20

Question
What type of current flows in only one direction?
Answer
  • alternating
  • direct

Question 21

Question
Device plates must be mounted as to _____.
Answer
  • cover the opening in the wall without seating against the wall surface
  • seat against the wall surface without covering the opening in the wall
  • be parallel to lines in the tile and similar wall finishes
  • cover the opening in the wall and to seat against the wall surface

Question 22

Question
Producing electricity from light involves the use of particles called [blank_start]photons[blank_end].
Answer
  • photons

Question 23

Question
What force is demonstrated in objects with unlike charges?
Answer
  • attraction
  • repulsion

Question 24

Question
Device boxes are designed for size NO. [blank_start]6-32[blank_end] screws.
Answer
  • 6-32

Question 25

Question
What is the maximum number of valence electrons in an atom?
Answer
  • 12
  • 8
  • 6
  • 4

Question 26

Question
what are the three principle parts of an atom?
Answer
  • electron, proton, and quark
  • neutron, positron, and electron
  • electron, neutron and proton
  • neutron, quark and electron

Question 27

Question
where noncombustible surface material is used on walls or ceilings, outlet boxes must be mounted so that they will be set back not more than ___ from the face of the surface material.
Answer
  • 1/16 in. (1.5mm)
  • 1/8 in. (3mm)
  • 1/4 in. (6mm)
  • 1/2 in. (12mm)

Question 28

Question
Fire resistance rating means the amount of time in minutes that a structure or component can withstand fire.
Answer
  • True
  • False

Question 29

Question
Lighting outlet boxes are designed for size No. [blank_start]8-32[blank_end] OR [blank_start]6-32[blank_end] screws.
Answer
  • 8-32
  • 6-32

Question 30

Question
A receptacle outlet is a ______
Answer
  • outlet where one or more receptacles are installed
  • outlet intended for the connection of a utilization device
  • outlet intended for the direct connection of a lamp holder
  • contact device for the connection of an attachment plug

Question 31

Question
The theory stating that current flow is produced when an electron from one atom knocks electrons of another atom out of orbit is generally called the [blank_start]bump[blank_end] theory.
Answer
  • bump

Question 32

Question
The nucleus of an atom contains ______.
Answer
  • neutrons and protons
  • electrons and protons
  • neutrons and quarks
  • electrons and quarks

Question 33

Question
When doing [blank_start]remodel (old work)[blank_end] work, requirements for supporting and securing cables are relaxed so that the cables can be "fished" through existing wall construction.
Answer
  • remodel (old work)

Question 34

Question
What part of an atom has a positive charge?
Answer
  • neutron
  • quark
  • proton
  • electron

Question 35

Question
Receptacles are not permitted to be mounted directly over [blank_start]baseboard[blank_end] heaters in residential construction.
Answer
  • baseboard

Question 36

Question
What part of an atom has a negative charge?
Answer
  • proton
  • quark
  • electron
  • neutron

Question 37

Question
Electrical wall boxes should not be mounted back-to-back in walls because ______.
Answer
  • it reduces the fire resistance of the wall
  • the practice violates building codes
  • sound may be transmitted from room to room.
  • all of the above

Question 38

Question
Alternating current is described as _____.
Answer
  • unidirectional
  • bidirectional
  • omnidirectional

Question 39

Question
Electrical current is the flow of ______
Answer
  • electrons
  • protons
  • quarks
  • neutrons

Question 40

Question
The NEC defines an OUTLET as a point in the wiring system where current is taken to supply luminaires.
Answer
  • True
  • False

Question 41

Question
The smallest part of a compound that retains the properties of that compound is a [blank_start]molecule[blank_end].
Answer
  • molecule

Question 42

Question
The NEC requires that a _________ be installed at each conductor splice connection point.
Answer
  • box or conduit body
  • duplex receptacle outlet
  • insulated wire connector
  • grounding electrode conductor ( ground wire)

Question 43

Question
The requirements for installing a lighting fixture weighing more than fifty pounds is to be supported independently of the outlet box unless the outlet box is listed and marked on interior of box to indicate the max weight the box is permitted to support.
Answer
  • True
  • False

Question 44

Question
Direct current is described as
Answer
  • Unidirectional
  • Bidirectional
  • Omnidirectional

Question 45

Question
In walls or ceilings constructed of non combustible material, such as concrete or tile, the edge of the outlet box is permitted to be set back not more than [blank_start]1/4” or 6mm[blank_end] from the finished surface.
Answer
  • 1/4” or 6mm

Question 46

Question
What type of current reverses its direction of flow at regular intervals?
Answer
  • Direct
  • Alternating

Question 47

Question
According to ________, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.
Answer
  • NEC 314.21
  • NEC 408.7
  • Article 100
  • NEC 110.12(A)

Question 48

Question
The symbol for a four-way switch is?
Answer
  • S4
  • SDS
  • S
  • S3

Question 49

Question
The symbol for a dimmer switch is?
Answer
  • S4
  • SDS
  • S
  • S3

Question 50

Question
The symbol for a 3-way switch is?
Answer
  • S4
  • SDS
  • S
  • S3

Question 51

Question
The symbol for a single-pole switch is?
Answer
  • S4
  • S
  • SDS
  • S3

Question 52

Question
What force is demonstrated in objects with like charges?
Answer
  • Attraction
  • Repulsion

Question 53

Question
The valance shellof an atom is the _____ shell.
Answer
  • Middle
  • Inner
  • Outer
  • Bottom

Question 54

Question
A device’s primary function is to _____?
Answer
  • Act as a resistor
  • Transform electric energy
  • Control electric energy
  • Utilize electric energy

Question 55

Question
Which piece of electrical equipment is NOT considered a device?
Answer
  • Lamp
  • Three-way switch
  • Disconnected switch
  • Receptacle

Question 56

Question
an electric circuit has a resistance of 20 ohm. The current is measured to be 6A. How many volts are applied to the circuit?
Answer
  • 3 1/3
  • 14
  • 26
  • 120

Question 57

Question
One coulomb per second is equal to one ________.
Answer
  • volt
  • ampere
  • watt
  • ohm

Question 58

Question
which of the following is NOT included when calculating the usable area of a dwelling to compute the required lighting load?
Answer
  • unfinished basement
  • powder rooms
  • living room
  • crawl space

Question 59

Question
the amount of electrical power being used in a circuit is measured in ________.
Answer
  • amperes
  • volts
  • watts
  • ohms

Question 60

Question
Wall receptacles must be placed so that no point measured horizontally along the floor line in any wall space is more than ____ feet from a receptacle outlet.
Answer
  • 3
  • 5
  • 6
  • 12

Question 61

Question
Code specifies that an ATTIC SPACE (not intended for storage) must have a switched lighting outlet or switched receptacle.
Answer
  • True
  • False

Question 62

Question
Code specifies that an BATHROOM must have a switched lighting outlet or switched receptacle.
Answer
  • True
  • False

Question 63

Question
Code specifies that a HALLWAY does not need a switched lighting outlet or switched receptacle.
Answer
  • True
  • False

Question 64

Question
Code specifies that a STAIRWAY must have a switched lighting outlet or switched receptacle.
Answer
  • True
  • False

Question 65

Question
Calculate the minimum number of 15-ampere lighting branch circuits required in a residence of 1850 square feet. ( VA X SQ FT) / 120 V
Answer
  • 2
  • 4
  • 1
  • 3

Question 66

Question
A grounding conductor helps prevent a shock hazard in the event that an un-grounded, or hot, conductor comes in contact with the case or frame of an appliance.
Answer
  • True
  • False

Question 67

Question
In the construction of one and two family dwellings, the electrical circuits are usually designed by the _________.
Answer
  • project manager
  • electrician
  • architect
  • consulting engineer

Question 68

Question
The minimum lighting load requirement for dwellings is ____ volt-amperes per square foot.
Answer
  • 2
  • 3
  • 5
  • 10

Question 69

Question
The statement, " in a DC circuit, the current is directly proportional to voltage and inversely proportional to resistance," is known as ______ law.
Answer
  • Ampere's
  • Coulomb's
  • Ohm's
  • Volt's

Question 70

Question
What is another term for electromotive force (EMF)?
Answer
  • amperage
  • ohmage
  • wattage
  • voltage

Question 71

Question
Continuous loads are not permitted to exceed ____ of the rating of the branch circuit.
Answer
  • 50
  • 80
  • 100
  • 125

Question 72

Question
Two cases where outdoor receptacles are exempt from GFCI are 1) outlets on dedicated circuit used for deicing of snow melting. 2) Outlets on dedicated circuits for HVAC equipment.
Answer
  • True
  • False

Question 73

Question
The neutral conductor is also referred to as the ______ conductor.
Answer
  • safety
  • hot
  • short
  • grounded

Question 74

Question
An electric motor is running on 120v. The current is measured to be 2A. How many ohms resistance is the motor?
Answer
  • 60
  • 118
  • 122
  • 240

Question 75

Question
A toaster is listed as 1560 Watts. When it is plugged into a 120 V circuit and starts to make toast, how many amperes will it draw?
Answer
  • 13
  • 1440
  • 1680
  • 187,200

Question 76

Question
A complete circuit is often referred to as a ______ circuit.
Answer
  • open
  • closed
  • grounded
  • shorted

Question 77

Question
How is track lighting load in residences calculated?
Answer
  • The method of calculation varies depending on the type of residence.
  • It is calculated at 60 watts per lighting head.
  • It is considered to be part of the general lighting load of 3 volt-amperes per square foot.
  • It is calculated at 150 volt-amperes per each two feet of track.

Question 78

Question
What determines the rating of a branch circuit?
Answer
  • Branch circuit wire size
  • Rating of over-current device
  • length of the circuit
  • total number of receptacles

Question 79

Question
The unit of resistance to current flow is the ______.
Answer
  • ampere
  • volt
  • watt
  • ohm

Question 80

Question
What type of circuit occurs when the conductors leading from and back to the power source become connected.
Answer
  • short
  • open
  • grounded
  • closed

Question 81

Question
What law states that the force of electrostatic attraction or repulsion is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them?
Answer
  • Volt's Law
  • Ohm's Law
  • Coulomb's Law
  • Ampere's Law

Question 82

Question
The Theory concerning current flow that is most widely accepted as being correct is the [blank_start]Electron[blank_end] flow theory.
Answer
  • Electron

Question 83

Question
For continuous loads, the branch-circuit rating, the conductors, and the over-current device are required to be not less than ____ of the rating of the equipment.
Answer
  • 75
  • 100
  • 125
  • 150

Question 84

Question
Recptacles in unfinished basements must be [blank_start]GFCI[blank_end] protected.
Answer
  • GFCI

Question 85

Question
If a Circuit is open, Current ______ flow.
Answer
  • will
  • will not

Question 86

Question
Approximately how many horsepower is an electric device listed as 3,000 watts?
Answer
  • 1/4
  • 1/6
  • 4
  • 6

Question 87

Question
The NEC requires outdoor receptacles to be _______.
Answer
  • AFCI
  • GFCI
  • on a dedicated circuit
  • GFCI protected and on a dedicated circuit.

Question 88

Question
The NEC defines a _____ as "the circuit conductors between the final over-current device protecting the circuit and the outlet(s)
Answer
  • branch circuit
  • receptacle outlet
  • feeder
  • service-entrance conductor

Question 89

Question
NEC 240.4(D) is referred to as the "small conductor rule" and tells us that the maximum over-current protection is 15 amperes for _______ copper conductors.
Answer
  • 8 AWG
  • 10 AWG
  • 12 AWG
  • 14 AWG

Question 90

Question
The general lighting load for a dwelling is based on ______.
Answer
  • square footage of the dwelling
  • total number of rooms
  • family lifestyle needs
  • city ordinance requirements

Question 91

Question
The amount of potential necessary to cause one coulomb to produce one joule of work is a _____.
Answer
  • watt
  • ohm
  • ampere
  • volt

Question 92

Question
What causes a wire to become warm when current flows through it?
Answer
  • voltage
  • divergence
  • resistance
  • amperage
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