IEC Midterm Semester 1
.000055
.055 mA = ____ A
1,200,000
1.2 MV= ___ V
.01
10 A = ____ kA or KA
112,300
112.3 V=___mV
.072
72 mV= ____ V
150,000
A 150 kW generator produces___Watts of power.
67.45
A 4 AWG THHN/THWN copper conductor can carry a maximum of___Where installed in a temperature of 139*F
Decreased
A circuit is to be run to a parking lot light. The blueprints call for you to run 10 AWG wire that has a diameter of .116 inches. You, however, run 8 AWG wire that has a diameter of .128 inches. You have___the total circuit resistance.
1920
A total load of 28,800 watts is distributed equally over 15 circuits. What is the load per circuit in watts?
Alternating Current
AC is an abbreviation for?
offset
A___Consists of two bends, usually having the same degree of bend, made to avoid an obstruction blocking the run of pipe.
4 square * 1.5 box
According to NEC box fill requirements, which of the following boxes is the smallest permitted to be used for one receptacle, four 12 AWG conductors, Two cable clamps and two 12 AWG ground conductors?
210 & 220
According to the NEC index, branch circuits are covered under in Articles?
True
Ampacity and current-carrying capacity mean the same thing? True or False?
100
Article___in the NEC distinguishes between outlet and receptacle?
permanent provisions for cooking
As defined in Article 100, a dwelling unit has the following features.
increases
As the Resistance in a circuit is decreased the amount of current in the circuit?
increases
As the length of wire in a circuit increases, the circuit resistance?
Bathroom, Kitchen, Laundry room
Branch circuits that serve a___are required to be rated at 20 amperes where installed in a house
True
Conductors must be sized to be able to carry the maximum load to be served. True or false?
Three-Way Switches
Controlling a light from two locations requires two_____
Amperes
Current is measured in?
Direct Current
DC is an abbreviation for?
Electrons
Electrical current is the flow of?
90.7
Grounding is covered in Article____ in the NEC
Up,Down,Sideways
Grounding-type receptacles are permitted to be installed with the grounding terminal?
10 feet
How long must a hallway in a dwelling be to require at least one receptacle outlet?
23
How many 250-foot rolls of BX cables are needed if a job requires 5750 feet?
34.8
If #10 THHN/THWN copper conductors are installed in EMT and the EMT is installed where the temperature is 110*F, theconductors have a corrected current-carrying capacity of___amps.
40
If a simple circuit has 480 volts applied with a current flow of 12 amperes, what is the resistance?
120
If a simple circuit has a resistance of 1200 ohms and a current flow of .1 ampere, what is its applied voltage?
.25
If a simple circuit with 400 ohms of resistance has 100 volts applied, its current flow is___amps
closed
If current flows through, a circuit, the circuit is?
Go Down
If the voltage is raised in a simple circuit, what will the current do?
12 AWG copper
Ignoring the effects of voltage drop, a 20-ampere branch circuit requires___conductors
Ampacity
In general,___of a conductor must not be less than the rating of the overcurrent device protecting the conductor.
Flow
In order to have electric current present, free electrons must do what continuously?
shall
In the NEC, the word____means that "it must be done."
210.19(A) I-Note 4
In the NEC, voltage drop for branch circuits is covered in?
Two 6 AWG or Three 8 AWG
In unfinished basements where NM cable is run at angles with joists, it shall be permissible to secure cables not smaller than___or conductors directly to the lower edges of the joists.
Installed in a storage building for a single-family dwelling
Look in the NEC index and find uses permitted for NM Cable. An Example of a permitted use is where?
334.10
Look in the NEC index and find uses permitted for NM Cable. The Code Reference for this is?
Installed in wet locations
Look in the NEC index and find uses permitted for UF Cable. An Example of a permitted use is where?
Knowing how to find information in a phone book
Navigating the NEC should be similar to?
Attract
Opposite charges__?
resistance
Opposition to current flow is generally termed.
resistance
Opposition to current flow is generally termed?
devices
Receptacles are commonly referred to as?
False
Section 210.52 in the NEC provides loaction requirements for receptacles outlets in restaurants? true or false?
314.16(b)(4)
Section___Of the NEC states that for each yoke or strap, containg one or more devices or equipment, a double volume allowance shall be made.
210.52(C)(1)
Section____in the NEC has a requirement that, for dwellings, receptacle outlets along kitchen countertops shall be installed so that no point along the wall line is more than 600 mm (24 in.) measured horizontally from a receptacle outlet in that space.
210.52(A)(1)
Section___in the NEC has a requirement that dwelling receptacles be installed so that no point measured horizontally along the floor line of any wall space is more than 1.8 m (6 ft) from a receptacle outlet.
210.52(A)(3)
Section___in the NEC states that, for dwellings: "Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within 450 mm (18 in.) of the wall."
insulation type
THHN is the designatoin for the___of a conductor
constructing a building
The IEC curriculum is organized similar to?
Dry
The NEC considers an installation inside a building to be a ___Location
Wet
The NEC considers installations underground to be___locations
False
The code book is something each apprentice should attempt to memorize? True or False?
3,5
The code recommends a voltage drop no greater than___percent for feeders and no greater than___percent total for feeders and branch circuits together.
.0824
The cross-sectional area of a 4 AWG THHN/THWN copper conductor is___Square inches
one,unless listed for more
The maximum number of Type NM cables that can be inserted into a connector is?
Acceptable to the authority having jurisdiction
The meaning of approved is?
22.2222
The resistance of a drill is___ohms where the nameplate supplies the following information: 5.4 amps 120 volts
30.2632
The resistance of a garage door opener is___ohms given the following nameplate information: 3.8 amps 115 volts
20 amps
The temperature where 10 AWG THHN/TWHN copper conductors are installed in RMC is 165*F the wiere can carry a load that draws a maximum of?
hot
The ungergrounded conductor is often called the?
Watts
The unit of measurement for power is?
Repel
Two particles that are both negatively charged will___each other.
pressure
Voltage is similar to____in a water pipe.
Work Done
Wattage is often compared to?
100
What article of the NEC defines outlet and receptacle?
Article 100
What article of the NEC may be referred to as a dictionary or glossary of terms?
12.3
What is the corrected ampacity of a #12 THHN/THWN copper conductor where the temperature is 160*F
48.75
What is the corrected ampacity of a #6 THHN/THWN copper conductor where the temperature is 147*F?
unchanged
When Circuit conductors larger than the minimum required by the NEC are installed, the rating of a branch circuit is?
decreased
When circuit resistance is increased, such as when corrosion develops at wire nut terminations, the flow of electrons in a circuit is?
opens
When turned OFF, a circuit breaker____the circuit
12
Where a branch circuit is rated at 20 amps, the smallest circuit conductors that can be installed are___awg copper
43.00
Where two #18, three #16, two #14, three #12, two #10, three #8, and two #6 conductors are contained in box___ cubic inches will be occupied in the box by these conductors.
Gold and Aluminum
Which materials listed below are good conductors
Air
Which materials listed below are good insulators?
a coffee maker, an electric oven heating element
Which of the following is a (are) resistive load(s)
4 11/16 *1 1/2
Which of the following metal boxes could be used for one single-pole light switch (connected to 12 AWGs), six each 14 AWG conductors, four 12 AWG conductors, and two cable clamps?
Voltage
___is the force that causes current to flow.
Every 3 Years
how often is the NEC revised and updated?
Bathroom
which areas in a residence require a switch-controlled lighting outlet instead of a switch-controlled receptacle?