#1
Which organization sets the electrical wiring standards in the United States?
National Electrical Code (NEC)
ExplanationNEC sets the standards for electrical wiring in the US.
#2
What is the standard voltage for household electrical outlets in the United States?
110 volts
ExplanationStandard household outlets in the US operate at 110 volts.
#3
What is the abbreviation for the National Electrical Code?
NEC
ExplanationNEC is the abbreviation for the National Electrical Code.
#4
What does the term 'AWG' stand for in electrical wiring?
American Wiring Gauge
ExplanationAWG stands for American Wiring Gauge.
#5
Which of the following wire colors is typically used to represent the 'ground' wire in electrical wiring?
Green
ExplanationGreen is commonly used for the 'ground' wire in wiring.
#6
What is the minimum height requirement for electrical outlets above the floor in residential buildings according to the NEC?
18 inches
ExplanationNEC mandates a minimum height of 18 inches for outlets.
#7
Which of the following is NOT a type of electrical wiring commonly used in residential buildings?
Cat6
ExplanationCat6 is not a commonly used residential wiring type.
#8
What does the abbreviation 'EMT' stand for in electrical wiring?
Electrical Metallic Tubing
ExplanationEMT stands for Electrical Metallic Tubing.
#9
Which electrical wiring color is typically used for the 'hot' wire in the United States?
Black
ExplanationBlack is commonly used for the 'hot' wire in the US.
#10
Which organization is responsible for developing electrical standards in Europe?
European Committee for Electrotechnical Standardization (CENELEC)
ExplanationCENELEC develops electrical standards in Europe.
#11
In electrical wiring, what is the function of a junction box?
To provide access to electrical connections
ExplanationJunction boxes offer access to electrical connections.
#12
What is the purpose of GFCI (Ground Fault Circuit Interrupter) outlets?
To prevent electrical shocks
ExplanationGFCI outlets prevent electrical shocks.
#13
In electrical wiring, what is the function of a service panel?
To distribute electricity to circuits
ExplanationService panels distribute electricity to circuits.
#14
What is the purpose of conduit in electrical wiring installations?
To protect wiring from damage
ExplanationConduit safeguards wiring from damage.
#15
What is the maximum number of conductors allowed in a single conduit according to NEC regulations?
5
ExplanationNEC allows a maximum of 5 conductors in a single conduit.
#16
What is the purpose of bonding in electrical wiring?
To connect metal parts together to prevent electric shock
ExplanationBonding connects metal parts to prevent electric shock.
#17
Which type of electrical wiring is commonly used in high-temperature environments?
TECK cable
ExplanationTECK cable is commonly used in high-temperature environments.