Quiz
Module 1-3 (EWR 19TH EDITION & DELMAR'S 6TH EDITION)
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Perguntas do quiz (92)
1The 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
- AZero
- B60
- C120
- D240
2An arc flash can produce temperatures of ________ degrees F
- A3500
- B15000
- C25000
- D35000
3Footwear suitable for electrical work is marked with letters ____
- ACF
- BEH
- COSHA
- DPPE
4For safety, it is very important that electrical equipment be “listed” by the _____
- ANEC
- BOSHA
- CNRTL
- DANSI
5The NEC is revised every ______ years so as to be as up to date as possible.
- A2
- B3
- C4
- D5
6The term APPROVED means to be _______.
- Alisted by a Nationally Recognized Testing Laboratory (NRTL)
- Bacceptable to the NEC
- Cacceptable to the architect or engineer designing the job
- Dacceptable to the authority having jurisdiction
7As defined in ARTICLE 100, a dwelling unit has the following feature(s)
- Apermanent provisions for living, sleeping, cooking, and sanitation
- Bliving, sleeping, and basement storage areas
- Cspace for eating, sleeping and recreation
- Doptional garage space
8All measurements in the NEC are shown in which system(s) of units?
- Ainch-pound (English) only
- BSI (Metric) only
- Cboth inch-pound and metric values
- Dboth natural units and physical units
9In the international system of units, the prefix KILO- means
- Ahundred
- Bthousand
- Cmillion
- Dbillion
10In the international system of units, the prefix MILLI- means
- Aone hundredth
- Bone thousandth
- Cone millionth
- Done billionth
11The 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.
- AVerdadeiro
- BFalso
12Nationally Recognized Testing Laboratories (NRTL) _________ electrical products to provide a basis for approval by inspectors in the field.
- Aapprove
- Btest and list
- Cdevelop standards
- Dendorse
13The purpose of the NEC code is the practical safe guarding of persons and property from hazards arising from the use of electricity.
- AVerdadeiro
- BFalso
14Always [blank_start]turn off[blank_end] the power before working on an electrical circuit.
- Aturn off
15Every time an electrician makes a decision concerning the electrical wiring, the decision should be checked by reference to the [blank_start]code[blank_end].
- Acode
16The AUTHORITY HAVING JURISDICTION over the electrical construction is generally the [blank_start]electrical inspector[blank_end].
- Aelectrical inspector
17The use of the word SHALL indicates a [blank_start]mandatory[blank_end] rule.
- Amandatory
18Nationally Recognized Testing Laboratories (NRTL) test and evaluate products for [blank_start]safety[blank_end].
- Asafety
19What is the smallest part of an element that still retains the properties of that element.
- Aan atom
- Ba proton
- Cneutron
- Dan electron
20What type of current flows in only one direction?
- Aalternating
- Bdirect
21Device plates must be mounted as to _____.
- Acover the opening in the wall without seating against the wall surface
- Bseat against the wall surface without covering the opening in the wall
- Cbe parallel to lines in the tile and similar wall finishes
- Dcover the opening in the wall and to seat against the wall surface
22Producing electricity from light involves the use of particles called [blank_start]photons[blank_end].
- Aphotons
23What force is demonstrated in objects with unlike charges?
- Aattraction
- Brepulsion
24Device boxes are designed for size NO. [blank_start]6-32[blank_end] screws.
- A6-32
25What is the maximum number of valence electrons in an atom?
- A12
- B8
- C6
- D4
26what are the three principle parts of an atom?
- Aelectron, proton, and quark
- Bneutron, positron, and electron
- Celectron, neutron and proton
- Dneutron, quark and electron
27where 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.
- A1/16 in. (1.5mm)
- B1/8 in. (3mm)
- C1/4 in. (6mm)
- D1/2 in. (12mm)
28Fire resistance rating means the amount of time in minutes that a structure or component can withstand fire.
- AVerdadeiro
- BFalso
29Lighting outlet boxes are designed for size No. [blank_start]8-32[blank_end] OR [blank_start]6-32[blank_end] screws.
- A8-32
- B6-32
30A receptacle outlet is a ______
- Aoutlet where one or more receptacles are installed
- Boutlet intended for the connection of a utilization device
- Coutlet intended for the direct connection of a lamp holder
- Dcontact device for the connection of an attachment plug
31The 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.
- Abump
32The nucleus of an atom contains ______.
- Aneutrons and protons
- Belectrons and protons
- Cneutrons and quarks
- Delectrons and quarks
33When 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.
- Aremodel (old work)
34What part of an atom has a positive charge?
- Aneutron
- Bquark
- Cproton
- Delectron
35Receptacles are not permitted to be mounted directly over [blank_start]baseboard[blank_end] heaters in residential construction.
- Abaseboard
36What part of an atom has a negative charge?
- Aproton
- Bquark
- Celectron
- Dneutron
37Electrical wall boxes should not be mounted back-to-back in walls because ______.
- Ait reduces the fire resistance of the wall
- Bthe practice violates building codes
- Csound may be transmitted from room to room.
- Dall of the above
38Alternating current is described as _____.
- Aunidirectional
- Bbidirectional
- Comnidirectional
39Electrical current is the flow of ______
- Aelectrons
- Bprotons
- Cquarks
- Dneutrons
40The NEC defines an OUTLET as a point in the wiring system where current is taken to supply luminaires.
- AVerdadeiro
- BFalso
41The smallest part of a compound that retains the properties of that compound is a [blank_start]molecule[blank_end].
- Amolecule
42The NEC requires that a _________ be installed at each conductor splice connection point.
- Abox or conduit body
- Bduplex receptacle outlet
- Cinsulated wire connector
- Dgrounding electrode conductor ( ground wire)
43The 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.
- AVerdadeiro
- BFalso
44Direct current is described as
- AUnidirectional
- BBidirectional
- COmnidirectional
45In 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.
- A1/4” or 6mm
46What type of current reverses its direction of flow at regular intervals?
- ADirect
- BAlternating
47According to ________, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.
- ANEC 314.21
- BNEC 408.7
- CArticle 100
- DNEC 110.12(A)
48The symbol for a four-way switch is?
- AS4
- BSDS
- CS
- DS3
49The symbol for a dimmer switch is?
- AS4
- BSDS
- CS
- DS3
50The symbol for a 3-way switch is?
- AS4
- BSDS
- CS
- DS3
51The symbol for a single-pole switch is?
- AS4
- BS
- CSDS
- DS3
52What force is demonstrated in objects with like charges?
- AAttraction
- BRepulsion
53The valance shellof an atom is the _____ shell.
- AMiddle
- BInner
- COuter
- DBottom
54A device’s primary function is to _____?
- AAct as a resistor
- BTransform electric energy
- CControl electric energy
- DUtilize electric energy
55Which piece of electrical equipment is NOT considered a device?
- ALamp
- BThree-way switch
- CDisconnected switch
- DReceptacle
56an electric circuit has a resistance of 20 ohm. The current is measured to be 6A. How many volts are applied to the circuit?
- A3 1/3
- B14
- C26
- D120
57One coulomb per second is equal to one ________.
- Avolt
- Bampere
- Cwatt
- Dohm
58which of the following is NOT included when calculating the usable area of a dwelling to compute the required lighting load?
- Aunfinished basement
- Bpowder rooms
- Cliving room
- Dcrawl space
59the amount of electrical power being used in a circuit is measured in ________.
- Aamperes
- Bvolts
- Cwatts
- Dohms
60Wall 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.
- A3
- B5
- C6
- D12
61Code specifies that an ATTIC SPACE (not intended for storage) must have a switched lighting outlet or switched receptacle.
- AVerdadeiro
- BFalso
62Code specifies that an BATHROOM must have a switched lighting outlet or switched receptacle.
- AVerdadeiro
- BFalso
63Code specifies that a HALLWAY does not need a switched lighting outlet or switched receptacle.
- AVerdadeiro
- BFalso
64Code specifies that a STAIRWAY must have a switched lighting outlet or switched receptacle.
- AVerdadeiro
- BFalso
65Calculate the minimum number of 15-ampere lighting branch circuits required in a residence of 1850 square feet. ( VA X SQ FT) / 120 V
- A2
- B4
- C1
- D3
66A 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.
- AVerdadeiro
- BFalso
67In the construction of one and two family dwellings, the electrical circuits are usually designed by the _________.
- Aproject manager
- Belectrician
- Carchitect
- Dconsulting engineer
68The minimum lighting load requirement for dwellings is ____ volt-amperes per square foot.
- A2
- B3
- C5
- D10
69The statement, " in a DC circuit, the current is directly proportional to voltage and inversely proportional to resistance," is known as ______ law.
- AAmpere's
- BCoulomb's
- COhm's
- DVolt's
70What is another term for electromotive force (EMF)?
- Aamperage
- Bohmage
- Cwattage
- Dvoltage
71Continuous loads are not permitted to exceed ____ of the rating of the branch circuit.
- A50
- B80
- C100
- D125
72Two 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.
- AVerdadeiro
- BFalso
73The neutral conductor is also referred to as the ______ conductor.
- Asafety
- Bhot
- Cshort
- Dgrounded
74An electric motor is running on 120v. The current is measured to be 2A. How many ohms resistance is the motor?
- A60
- B118
- C122
- D240
75A 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?
- A13
- B1440
- C1680
- D187,200
76A complete circuit is often referred to as a ______ circuit.
- Aopen
- Bclosed
- Cgrounded
- Dshorted
77How is track lighting load in residences calculated?
- AThe method of calculation varies depending on the type of residence.
- BIt is calculated at 60 watts per lighting head.
- CIt is considered to be part of the general lighting load of 3 volt-amperes per square foot.
- DIt is calculated at 150 volt-amperes per each two feet of track.
78What determines the rating of a branch circuit?
- ABranch circuit wire size
- BRating of over-current device
- Clength of the circuit
- Dtotal number of receptacles
79The unit of resistance to current flow is the ______.
- Aampere
- Bvolt
- Cwatt
- Dohm
80What type of circuit occurs when the conductors leading from and back to the power source become connected.
- Ashort
- Bopen
- Cgrounded
- Dclosed
81What 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?
- AVolt's Law
- BOhm's Law
- CCoulomb's Law
- DAmpere's Law
82The Theory concerning current flow that is most widely accepted as being correct is the [blank_start]Electron[blank_end] flow theory.
- AElectron
83For 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.
- A75
- B100
- C125
- D150
84Recptacles in unfinished basements must be [blank_start]GFCI[blank_end] protected.
- AGFCI
85If a Circuit is open, Current ______ flow.
- Awill
- Bwill not
86Approximately how many horsepower is an electric device listed as 3,000 watts?
- A1/4
- B1/6
- C4
- D6
87The NEC requires outdoor receptacles to be _______.
- AAFCI
- BGFCI
- Con a dedicated circuit
- DGFCI protected and on a dedicated circuit.
88The NEC defines a _____ as "the circuit conductors between the final over-current device protecting the circuit and the outlet(s)
- Abranch circuit
- Breceptacle outlet
- Cfeeder
- Dservice-entrance conductor
89NEC 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.
- A8 AWG
- B10 AWG
- C12 AWG
- D14 AWG
90The general lighting load for a dwelling is based on ______.
- Asquare footage of the dwelling
- Btotal number of rooms
- Cfamily lifestyle needs
- Dcity ordinance requirements
91The amount of potential necessary to cause one coulomb to produce one joule of work is a _____.
- Awatt
- Bohm
- Campere
- Dvolt
92What causes a wire to become warm when current flows through it?
- Avoltage
- Bdivergence
- Cresistance
- Damperage
Informações
- Descrição
- EWR AND DELMAR’S
- Autor
- Lonnie Dobyns
- Idioma
- English
- Visualizações
- 5
- Etiquetas
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