Electrical midterm
According to 240.4 D3 the largest circuit breaker that can be used to protect a circuit that uses 14 conductors has a rating of ____ amps
15
What is the current drawn by a garage door opener motor if the nameplate supplies the following information is operated on 130 V 13.8 A, 115 V
15.6
Four circular transformer, concrete pad
1701
A heating element in a plate warmer in a restaurant is rated to deliver 4.5 KW at 240 volts. How many amps does the plate warmer draw at 240 Volts
18.75
It is permitted to use an extension cheater bar on a wrench handle under which of the following conditions
Never
An electrician has a gross pay of 396.00 and work 44 hours. What is the hourly rate of pay of the electrician?
Nine dollars
Two particles that are both positively charged will ____ each other
Repel
_____ is the force that causes current flow
Voltage
Electrons have a ________ charge.
negative
for a 277/480 volt, 3 phase, 4-wire supply system the voltage from A phase to B phase is_____.
none of these
How would 13,800 V be written in the metric notation?
13.8 kV
The volume of the tank shown in 107.1424 is ______cubic yards
1396
If a 500,000 circular mill cable is composed of 37 strands, what is the diameter of each strand of the cable per table 8 in the nec
.116 inches
A 1/4 - 28 • 3 1/2 machine screw has a shaft diameter of
.25
.055 mA = ___ A
0.00055
The decimal equivalent of 5/8 is
0.625
When running in MC through a board hole and a stud, the nearest edge of the board hole shall not be less than ________ inches from the face of the stud unless the cable is protected by a 16th inch thick metal steel plate
1 1/4
Generally, when sizing conductors, and OCPS overcurrent protective devices the loads are served equals_________
1 multiplied the noncontinuous loads +1.25 times the continuous loads
Generally, no more than _______ outlets can be connected to any one 20 amp 120 V circuit in this EWR dwelling
10
The circular mill area of a tin bear copper conductor is ______ Cmil
10,380
What is the average resistance of 150 pound man according to the IEEE
1000 ohms
In the NEC, which article explains the general requirements for receptacle outlet
105
Unused opening in boxes shall be closed. Find the code reference. The code reference for this is______
110.12 a
When tightening a hex not shown below, which box wrench when properly sized has a greater possibility of slipping on the nut
12 - point
Red concrete
12.06
The typical service voltage for one and two family dwelling is
120/240 bolt single phase 3 wire
A 13.9 amp 240 V load is connected to a two pole circuit breaker in a 120/240 V single phase 3, wire panel board using 12 to AC cable. Use K 11.3 and limit the voltage dropped in the circuit conductors to 2.5%. The maximum length of the cable that can be used for the circuit is______ feet
124
Where are conductors of higher capacity are used for any reason the Ampor rating or setting of the specified overcurrent device shall determine the circuit rating. The code reference for the statement is section
210.18
Referred to figure 105.1511. The length of c is _____where a = 22' andb = 9-1/4'
23'-10-3/8"
The electrical supply house delivered four loads of trade size half-inch EMT. The first load has 5400 feet of conduit. The second had 4000 feet of conduit the third had 4460 feet of conduit and the fourth load had 2240 feet of conduit. On average the electricians on the job are installing 575 feet a day. It will take ______ days to install all the conduit that was delivered.
28
Using 12 2MC cable, with interlocked armor has an overall diameter of half an inch. What is the minimum dimension as shown at figure 110.12
3 1/2
Telephone pole
3 feet
EMT shall be securely fastened in place at least very ______. In addition, each EMT run between termination points shall be securely fastened within ______ of each outlet box junction, box, device box, cabinet conduit, body, or other tubing termination.
3 m or 10 feet, 900 mm or 3 feet
The code recommends a voltage drop no greater than ______ for the feeders in no greater than _______ person, total four feeders and branch circuits together
3,5
Boxes are to be mounted in noncombustible walls, so that the boxes flush with the finished wall surface. However, the NEC permits these boxes to be set back ________from the finished wall surface.
3/16 or 1/18
According to the NEC, what is the largest size of flexible metallic tubing that can be used?
3/4 of an inch
_____ is the code article that provides the requirements of type AC cable
320
3.2 kQ = Q
3200
The NEC requirements for securing schedule 40 PVC in horizontal runs are located in section
352.30
The cabinet in the AWR master bath is ________ wide
36
You are going to dig a trench and install conduit underground to supply power of the office building as Sheen. Figure 105.1518. To run from the Centerpoint transformer to the service along routeA. ____ feet of conduit is required.
397
You have to run 240 V circuit to a 24 amp load that is located 321 feet away from the panel. The smallest wire you can pull for the circuit is ______ AWG. The voltage drop can't exceed 4.8.
4
A water heater has a nameplate rating at 5KW at 230 V. If the voltage supply to the 5000 W element in the water heater drought 215 V, the water heater could deliver _______ watts.
4369
The length of a perimeter on the square shown above in figure 105.1,506 is
53'10"
Referred to the door schedule on the AWR plants. The front door of the residence house is _____ high.
6',8"
The mounting holes on the face of the box, IV, and figure 107.36 or tapped for_______ screws
6-32
Which of these screws has the small shaft diameter
6-32
NM cable is to be installed in the unfinished basement in the home. The cable will be running perpendicular, two, and stapled two, the bottom of the ceiling joist. What size and M cable is permitted
6/3 AWG
What is the voltage drop of a 120 V circuit? The circuit uses 12 odd copper conductors that have a load of 20 A. There is a distance of 100 feet from the panel of the load.
7.35 volts
Your homework average is 20% because you only turned in one homework during the second quarter and he scored an 80% on that one assignment your second quarter pop quiz average is 82%. You're grade on the second quarter exam is 81% your homework counts 415% of your second quarter grade your pop quiz grade counts for 15% of your exam grade count 70% of your second quarter grade. 15% +15% +70% equals 100%. Your average grade of the second quarter of the school year is________ percentage.
72
64 yd.² = ______ squared inches
82,944
There are 67 questions on an exam. If you miss 8 of these questions your grade is ___%.
88
As shown below, how thick is a wall if three layers of 5/8 and sheet lock or install on one side of a 5 7/8 inch metal stud and two layers of half inch sheet lock are installed on top of one layer of 7/8 inch plywood on the other side of the stud
9 5/8 inches
If H = 32 feet and I = 19 inches then the feet of the ladder should be _____ from the building wall
9',7"
When using cable cutters to cut wire, the cable cutter should be at a ______degree angle to the wire
90
According to OSHA, what is the maximum number of days a cord can be used as a part of a temporary installation?
90 days
Which of the following can be used to sharpen doll cutting edge of tools
A file or a Whetstone
Type NMC cable should not be used for the wiring method in which of the following
A motion picture studio
The meaning of approved is ____.
Acceptable to the authority having jurisdiction.
Before using power tools
All of the above
NEC 310.10 directs the user to table 310.4 A for conductor construction. XHHW conductors have an insulation that permits install installation of the conductor in_______ locations
All of the above
A flex type NM liquid tight, flexible non-metallic conduit can be installed
All of these
Refer to the EWR drawing. The exterior post light.______
All of these
Current is measured in
Amperes
If you were standing on the highest permitted step on a 12 foot step ladder, you _______ required to use protection equipment
Are not
When doing voltage drop calculations, where is the cross-sectional area in circular Mills located?
Chapter 9 table 8
Which circuit has a higher resistance during the summer both circus have the same size wire in our the same length, and use the same conductor material
Circuit number one run and conduit on the roof of the building
Which of the 250 foot long conduits below has a lesser resistance
Circuit number two uses 10 wire
One turned on, a circuit breaker, _____ the circuit
Closes
Which materials listed below are good conductors
Copper and gold
In particular load is rated for 2.2 KW at 240 V. If two of these loads are connected at the same circuit, the total circuit current is _____ that of one load.
Double
The temporary lighting for this AWR house project is to be installed in accordance with
NEC article 590 and OSHA standards
1 inch conduit cost $800 per 1000 foot bundle. The cost of 1 10 foot stick is___
Eight dollars
Chrome finish sockets designed for used with a socket wrench. Can also be safely used on an impact wrench.
False
Referred to the AWR plans. The symbol shown is used on a drawing 2/10 and represents a sectional view of the house. The view is shown on drawing 7/10. What is the room behind the brick wall on the left of the a - a section view.
Garage
GHS is an abbreviation for ___.
Globally Harmonized System
The correct flat blade should
Have a blade thickness that fits snuggly into and reaches the bottom of the screws slot. And be the same width or slightly narrower than the length of the screw slot.
The symbol octagonal eight is used to represent a blank on the AWR plan legend
Heat alarm
As shown and figure 107.32 is referred to as a box partition
II
As shown in figure 103.31 ______is referred to as brick box
III
A circuit is to be run to a parking lot light. The blueprints can call for you to run eight Au wire that has a diameter of .128 inches however you number 10 wire that has a diameter of 1.16 inches you have_______ the total circuit resistance.
Increased
When non-metallic sheath cable is used as a fixture whip behind a box and a luminaire above an accessible ceiling it______
Is not required to be secured or supported if 4 1/2 feet or less less in length
When type MC cable is installed in horizontal runs through holes and sheet metals studs Joyce do additional support have to be installed? The MC cables are securely fastened within the required distance of any boxes for enclosures and the framing members of 24 inches centers.
No
Power tools can be carried by the cord _____
None of the above
Referred to the ER drawings. How many smoke alarms are located in the basement
One
The maximum distance permitted between a box and the first strap for an installation using 1 inch LFMC liquid tight, flexible metal conduit is ______ feet
One
The maximum number of type in M cables that can be inserted to be a connector is
One less listed for more
The national electric code is a minimum _____ standard
Safety
If a code rule is permitted, but not mandatory includes the words______
Shall not be required, and shall be required
An electrical panel schedules are located on EWR plan number
Six
Refer to 102.18 when using this tool for its intended purpose, you should wear safety glasses
True
Terminating the conductors in a residential meter base requires you to use a Calibrated torque tool
True
The safety equipment shown above and 102.50 is used when
Working at some high above the ground, where you might fall, but the roper lanyard that is attached to a strong support or structure, would catch you before hitting the ground
A 4 foot long piece of FMC will be installed to connect a motor that is going to vibrate. Does the NEC require that a separate equipment ground and conductor be installed?
Yes
Power tools should _____
have a power cord that has grounding type cord cap or be double insulated
Wire sizes up through 4/0 are expressed in American Wire Gauge. Wire sizes larger than 4/0 are expressed in
kcmil
If the voltage is lowered in a simple circuit, what will the current do?
to go down
