2. CONSERVAS CALIFORNIA S.A
2.9 DIAGNÓSTICO CONSERVAS CALIFORNIA S.A
## CORRECT --> SECTION 350.10 & 350.12
17. The maximum size of flexible metallic tubing that may be used in any
construction or installation is _____.
a)
3/8"
b)
1/2"
c)
3/4"
d)
1"
## CORRECT --> This seems very small, but it is w hat the Code says. The Minimum Bend Radii is 17 1/2 inches! SEECTION 360.20(B)
18. Where conductors of less than 600 volts emerge from the ground they shall
be protected by enclosures or raceways that extend from below grade to a
point at least ____ feet above finished grade.
a)
4
b)
6
c)
8
d)
10
## CORRECT --> SECTION 300.5(D)(1)19. The total number of quarter bends allowed in one run of rigid nonmetallic
conduit shall not exceed ____.
a)
2
b)
3
c)
4
d)
5
## CORRECT --> SECTION 352.26
20. Where ungrounded conductors of minimum size No. _____ or larger enter
a raceway in a cabinet, the conductors shall be protected by an insulated
fitting.
a)
3
b)
4
c)
6
d)
5
## CORRECT --> Where racew ays containing
ungrounded conductors No. 4 or larger enter a cabinet, box enclosure, or racew ay, the conductors shall be protected.SECTION 300.4(G)
2008 NEC Review Practice Test 6
Course Name: 2008 NEC Review
Quiz Number: No. 6
Teacher: Gerald Newton
Teacher's Home Page: http://www.electrician2.com
Teacher's Email: [email protected]
No. of Questions= 20
1.
Fountains that have water common to a swimming pool do not need to
comply with all of the swimming pool requirements.
a)
True
## CORRECT --> SECTION 680.50
2.
At swimming pools an intentional bond of a minimum conductive surface
area of 9 square inches shall be installed in contact with the pool water.
This bond shall be permitted to consist of parts that are required to be
bonded in 680.26(B).
a)
True
b)
False
## CORRECT --> 680.26(C)
3.
Metal parts of forming shells for Wet-Niche swimming pool luminaires in
contact with pool water are not permitted to be made of brass.
a)
True
b)
False
## CORRECT --> 680.23(B)(1)
4.
The minimum depth for any underwater lighting fixture is 18 inches below
water unless listed otherwise.
a)
True
b)
False
## CORRECT --> Wall-Mounted Luminaires (Fixtures). Luminaires (lighting fixtures) mounted in w alls shall be installed w ith the top of the luminaire (fixture) lens not less than 450 mm (18 in.) below the normal w ater level of the pool, unless the luminaire (lighting fixture) is listed and identified for use at lesser depths. No luminaire
5.
GFCI protection is required for any branch circuit that supplies underwater
fixtures operating at over 15-volts.
b)
False
## CORRECT --> ground-fault circuit interrupter shall be installed in the branch circuit supplying fixtures operating at more than 15 voltsSECT.680.23(A)(3)
6.
Receptacles located within 20 feet of the inside walls of a swimming pool
require GFCI protection.
a)
True
b)
False
## CORRECT --> All 125-volt receptacles located w ithin 20 ft (6.08 m) of the inside w alls of a pool or fountain shall be protected by a ground-fault circuit
interrupter.SECT.680.22(A)(4)
7. A storable swimming pool must not have any dimension over 12 feet.
a)
True
b)
False
## CORRECT --> Storable Sw imming or Wading Pool. Those that are constructed on or above the ground and are capable of holding w ater to a maximum depth of 42 in. (1.07 m), or a pool w ith nonmetallic, molded polymeric w alls or inflatable fabric w alls regardless of
dimen.SECT.680.2
8.
In a data-processing room the control for the disconnecting means shall be
grouped and identified and shall be readily accessible at the principal exit
doors.
a)
True
b)
False
## CORRECT --> The control for these disconnecting means shall be grouped and identified and shall be readily accessible at the principal exit doors.
9.
A disconnecting means must be provided for all data-processing equipment
in a information technology equipment room.
b)
False
## CORRECT --> The HVAC equipment must also be disconnected.SECT 645.10
10. Type NM cables are permitted to connect data-processing equipment by
under floor wiring.
a)
True
b)
False
## CORRECT --> There is a long list of w iring methods, but NM is not in the list.SECT 645.5(D)(2)
11. The bottom of a sign must be at least 12 feet above an area accessible to
vehicles.
a)
True
b)
False
## CORRECT --> Sign or outline lighting system equipment shall be at least 14 ft (4.4 m) above areas accessible to vehicles unless protected from physical damage.SECTION 600.9 (A)
12. Electric signs using incandescent lamps must be marked with the number
of lampholders.
a)
True
b)
False
## CORRECT --> Signs and outline lighting systems w ith incandescent lamp holders shall be marked to indicate the maximum allow able w attage of lamps.
13. A lighting fixture is permitted in a clothes closet if an 18-inch clearance is
maintained from the storage area.
b)
False
## CORRECT --> SECT 410.16 (C)
14. An AC general use snap switch must not be used to control a tungsten-
filament lamp loads.
a)
True
b)
False
## CORRECT --> SECTION 404.14(A)
15. Junction boxes must be accessible.
a)
True
b)
False
## CORRECT --> Conduit bodies, junction, pull, and outlet boxes shall be installed so that the w iring contained in them can be rendered accessible w ithout removing any part of the buildingSECTION 314.29
16. A duplex receptacle in a box reduces the number of allowed conductors by
two.
a)
True
b)
False
## CORRECT --> SECTION 314.16 (B)(4)
17. Edison-base fuses are acceptable for new installations.
a)
True
## CORRECT --> Plug fuses of the Edison-base type shall be used only for replacements in existing
installations w here there is no evidence of overfusing or tampering.
18. Flexible metallic tubing may not be used in lengths over 5 feet.
a)
True
b)
False
## CORRECT --> 6 ft. SECTION360.12(6)
19. EMT installed in the ground in cinder concrete must have a protective layer
of noncinder concrete at least 2 inches thick.
a)
True
b)
False
## CORRECT --> In cinder concrete or cinder fill w here subject to permanent moisture unless protected on all sides by a layer of noncinder concrete at least 2 in. (50.8 mm) thick or unless the tubing is at least 18 in. (457 mm) under the fill.
20. The largest size NM cable has No. 2 copper conductors or No. 2 aluminum
conductors.
a)
True
b)
False
## CORRECT --> The pow er conductors shall be sizes No. 14 through No. 2 w ith copper conductors or sizes No. 12 through No. 2 w ith aluminum or copper-clad aluminum conductors.
2008 NEC Review Practice Test 7
Course Name: 2008 NEC Review
Quiz Number: No. 7
Teacher: Gerald Newton
Teacher's Email: [email protected]
No. of Questions= 20
1. Type MV cable is rated 2,001-volts or higher.
a)
True
b)
False
## CORRECT --> Type MV cable is a single or
multiconductor solid dielectric insulated cable rated 2001 volts or higher.section 328.2
2.
Open wiring on insulators above 6 feet from the floor does not require
protection.
a)
True
b)
False
## CORRECT --> Conductors w ithin 7 ft (2.13 m) from the floor shall be considered exposed to physical damage. sect.398.15(c)
3. Cable tray systems must not be used in hoist ways.
a)
True
b)
False
## CORRECT --> sect 392.4
4.
Flexible metal conduit may be used to protect conductors emerging from
the ground and run on a pole.
a)
True
## CORRECT --> Direct-buried conductors and cables emerging from the ground shall be protected by enclosures or racew ays extending from the minimum cover distance required by Section 300.5(D)(1) below grade to a point at least 8 ft (2.44 m) above finished grade.sect.348.12(6)
5.
Under normal conditions, direct buried cables must be buried at least 24
inches.
a)
True
b)
False
## CORRECT --> In general the requirement is 24 inches w ith many other depths given.sectiin 300.5(A)&TABLE 300.5
6.
A No. 6 copper conductor in a vertical raceway must be supported at least
every 80 feet.
a)
True
b)
False
## CORRECT --> SECTION 300.19(A) & TABLE 300.19(A)
7. Conductors of size No. 1 for general use may not be run in parallel.
a)
True
b)
False
## CORRECT --> Aluminum, copper-clad aluminum, or copper conductors of size No. 1/0 and larger, comprising each phase, neutral, or grounded circuit conductor, shall be permitted to be connected in parallel (electrically joined at both ends to form a single conductor).SECTION 310.4
8.
A connection of a No. 8 conductor to a terminal can be by means of a
pressure connector or solder lug.
a)
True
## CORRECT --> Connection of conductors to terminal parts shall ensure a thoroughly good connection w ithout damaging the conductors and shall be made by means of pressure connectors (including set-screw type), solder lugs, or splices to flexible leads. Connection by means of w ire-binding screw s or studs and nuts that
9.
At least 4 Inches of free conductor must be left at each outlet to connect
luminaires.
a)
True
b)
False
## CORRECT --> 6 inches, not 4 inches.SECTION 300.14
10. Holes in studs for cables must be in the center and not less than 1 inch from
the nearest edge of the stud.
a)
True
b)
False
## CORRECT --> By Section 300.4(A)(1) the edge of holes must be 1 1/4 inches from nearest edge.SECTION 300.4(A)(1)
11. The smallest fixture wire permitted by the Code is size No. 18.
a)
True
b)
False
## CORRECT --> SECTION 402.3 AND TABLE 402.3
12. Flexible cords may not be used if they are concealed behind building walls,
ceilings or floors.
a)
True
## CORRECT --> SECTION 400.8
13. When six current-carrying conductors are installed in a raceway, the
maximum load current of each must be reduced to 70 per cent.
a)
True
b)
False
## CORRECT --> 80 percent, not 70 percent. See the Table.TABLE 310.15(B)(2)(a)
14. A No. 14 grounded conductor in a circuit must have a white or gray color.
a)
True
b)
False
## CORRECT --> There are other rules, too.SECTION 200.6(A)
15. A feeder tap less then 25 feet long requires overcurrent protection if the
ampacity of the tap conductors is at least one-third of the ampacity of the
feeder conductors.
a)
True
b)
False
## CORRECT --> SECTION 240.21(B)(2)
16. A conductor in a general circuit with an ampacity of 735-amperes may be
protected by an 800-ampere fuse.
a)
True
## CORRECT --> SECTION 240.4(B)
17. A three-phase air conditioner must be directly connected to a recognized
wiring method and not by flexible cord.
a)
True
b)
False
## CORRECT --> A room air conditioner that is rated three phase or rated over 250 volts shall be directly connected to a w iring method recognized in Chapter 3, and provisions of Art 440 Part G shall not
apply.SECTION 440.60
18. An attachment plug and receptacle may disconnect cord-connected
household refrigerating equipment.
a)
True
b)
False
## CORRECT --> SECTION 422.16
19. Type AC cable must not be used to connect motors to their supply.
a)
True
b)
False
## CORRECT --> SECTION 320.10 &320.12
20. The frames of stationary motors supplied by metal-enclosed wiring must be
grounded.
a)
True
## CORRECT --> SECTION 430.242
2008 NEC Review Practice Test 8
Course Name: 2008 NEC Review
Quiz Number: No. 8
Teacher: Gerald Newton
Teacher's Home Page: http://www.electrician2.com
Teacher's Email: [email protected]
No. of Questions= 20
1.
A disconnecting means for a 2,300-volt motor must be capable of being
locked in the open position.
a)
True
b)
False
## CORRECT --> SECTION 430.227
2.
The branch circuit overcurrent device may serve as the disconnecting
means for stationary motors rated less than one horsepower.
a)
True
b)
False
## CORRECT --> For stationary motors of 1/8 hp or less, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means.SECTION 430.109(B)
3. A motor controller shall open all conductors to the motor.
b)
False
## CORRECT --> The controller shall not be required to open all conductors to the motor.SECTION 430.84
4.
In general, enclosures for motor controllers shall not be used as junction
boxes unless designs are employed that provide adequate space for this
purpose.
a)
True
b)
False
## CORRECT --> Enclosures for motor controllers and disconnecting means shall not be used as junction boxes, auxiliary gutters, or racew ays for conductors feeding through or tapping off to the other apparatus unless designs are employed that provide adequate space.SECTION 430.10(A)
5.
Heating panels for de-icing must not exceed a rating of 120-watts/square
foot.
a)
True
b)
False
## CORRECT --> There are also heating panel requirements for space heating in Article 424.SECTION 426.20(A)
6. Excess leads of heating cables must not be cut.
a)
True
b)
False
## CORRECT --> Excess leads of heating cables shall not be cut but shall be secured to the underside of the ceiling and embedded in plaster or other approved material, leaving only a length sufficient to reach the junction box w ith not less than 6 in. (152 mm) of free SECTION 424.43(C)
7.
In most cases, heating cables installed on ceiling boards must be secured at
intervals not exceeding 16 inches.
b)
False
## CORRECT --> Cables shall be secured by means of approved stapling, tape, plaster, nonmetallic spreaders, or other approved means at either intervals not exceeding 16 in. (406 mm) or at intervals not exceeding 6 ft (1.83 m) for cables identified for such use.SECTION 424.41(F)
8.
Conductors located above a heated ceiling are considered to operate in a 40
degrees C ambient.
a)
True
b)
False
## CORRECT --> SECTION 424.36
9. The non heating leads of 120-volt space heating cables are yellow,
a)
True
b)
False
## CORRECT --> SECTION 424.35
10. Unit switches may disconnect a heater if other means of disconnection are
provided.
a)
True
b)
False
## CORRECT --> A unit sw itch(es) w ith a marked “off” position that is part of a fixed heater and disconnects all ungrounded conductors shall be permitted as the disconnecting means required by this article w here other means for disconnection are
provided.SECT.424.19(C)
11. A cord and plug may be the disconnecting means for a wall-mounted
electric oven.
a)
True
## CORRECT --> SECT 422.16(B)(3) & 422.33(A)
12. Dishwashers shall be connected with Type SP-1 flexible cords.
a)
True
b)
False
## CORRECT --> Built-in dishw ashers and trash compactors shall be permitted to be cord- and plug- connected w ith a flexible cord identified as suitable for the purpose in the installation instructions of the appliance manufacturer.SECT.422.16(B)(2) & TABLE 400.4
13. Flexible cords are permitted only to supply portable appliances.
a)
True
b)
False
## CORRECT --> SECTION 400.7 (A)
14. Toasters may have live parts exposed to contact.
a)
True
b)
False
## CORRECT --> Appliances shall have no live parts normally exposed to contact other than those parts functioning as open-resistance heating elements, such as the heating element of a toaster, w hich are necessarily exposed.SECT. 422.4
15. The conductor between the surge arrester and the line and the surge
arrester and the grounding connection shall not be smaller than 6 AWG
copper or aluminum.
a)
True
## CORRECT --> Line and ground connecting
conductors shall not be smaller than 6 AWG copper or aluminum.SECT.280.23
16. If a generator operates at 30-volts, protection of live parts is required when
the generator is accessible to unqualified persons.
a)
True
b)
False
## CORRECT --> SECTION 445.14
17. The nominal voltage of a lead-acid battery is 2.0 volts per cell.
a)
True
b)
False
## CORRECT --> SECTION 480.2
18. A capacitor operating at 300-volts must be discharged to 50-volts or less
within one minute after it is disconnected from the supply.
a)
True
b)
False
## CORRECT --> SECTION 460.6(A)
19. Capacitor circuit conductors must have an ampacity at least 125% of the
rated current of the capacitor.
a)
True
## CORRECT --> 135% is the requirement.SECTION 460.8(A)
20. Potential or voltage transformers installed indoors require primary fuses.
a)
True
b)
False
## CORRECT --> SECTION 450.3(C)
2008 NEC Review Practice Test 9
Course Name: 2008 NEC Review
Quiz Number: No. 9
Teacher: Gerald Newton
Teacher's Home Page: http://www.electrician2.com
Teacher's Email: [email protected]
No. of Questions= 20
1.
The branch circuit load for a 12-kilowatt electric range in a dwelling is 8-
kilowatts.
a)
True
b)
False
## CORRECT --> SECT 220.55,TABLE 220.55
2. An appliance always requires a disconnecting means.
b)
False
## CORRECT --> SECT.422.30
3.
A 40-ampere branch circuit may supply several fixed electric space heaters
in a dwelling.
a)
True
b)
False
## CORRECT --> SECT.424.3(A)
4.
The rating of the overcurrent protective device for a circuit supplying a
hermetic motor-compressor may not exceed 225% of the rated load current
under any circumstances.
a)
True
b)
False
## CORRECT -->SECT 440.22(A)
5.
To measure the area of a dwelling to determine the lighting load, the
outside dimensions, including the garage, are used.
a)
True
b)
False
## CORRECT --> SECT.220.12
6.
Under no circumstances can the continuous load supplied by a branch
circuit exceed 80% of the conductor ampacity before the application of any
derating factors..
a)
True
b)
False
## CORRECT --> SECT.210.19(A)(1) EXCEPTION
7. A 20-ampere laundry circuit is always required in each dwelling unit.
a)
True
b)
False
## CORRECT --> SECTION 210.52(F) EXCEPTION #1 &# 2
8.
Branch circuit conductors supplying fixed resistive type space heaters must
be rated at 125% of the heater load.
a)
True
b)
False
## CORRECT --> SECT.424.3(B)% 210.19(A)(1)
9.
The computed load of a feeder shall not be less than the sum of the loads on
the branch circuits after any applicable demand factors have been applied.
a)
True
b)
False
## CORRECT --> SECT.220.40
10. When the standard calculation method is used, the minimum feeder load
for a household electric clothes dryer is 5,000 watts.
b)
False
## CORRECT --> SECT.220.54
11. The optional calculation method for a dwelling unit may be used when the
service is a two-wire, 120-volt service.
a)
True
b)
False
## CORRECT --> SECT.220.82(A)
12. The optional calculation method for multi-family dwellings does not apply
to dwellings whose units have neither electric space heating nor air-
conditioning.
a)
True
b)
False
## CORRECT --> SECT.220.84(A)
13. The service-entrance equipment for a one-family dwelling, if rated 200-
amperes and installed indoors, must be illuminated.
a)
True
b)
False
## CORRECT --> SECT.110.26(D)
14. The working clearance in front of live parts, operating at 120-volts, must be
at least three feet.
a)
True
b)
False
## CORRECT --> SECT.110.26(A)
15. The minimum headroom around a motor control center must be 6 feet.
a)
True
b)
False
## CORRECT --> SECT.110.26(E)
16. On a switchboard with bus bars, normally, phase B would have the highest
voltage to ground in a high-leg delta arrangement.
a)
True
b)
False
## CORRECT --> SECT.408.3(E)
17. All panelboards shall have a rating not less than the minimum feeder
capacity required for the calculated load.
a)
True
b)
False
## CORRECT --> SECT.408.30
18. In general, a panelboard shall be protected by an overcurrent protective
device having a rating not greater than that of the panelboard. This
overcurrent protective device shall be located within the panelboard.
a)
True
b)
False
## CORRECT --> SECT.408.36
19. The grounding terminal bar is not connected to the neutral bar in a panel
board not used as service equipment.
a)
True
b)
False
## CORRECT --> GENERAL RULE IN SECT.408.40 DETAILS IN 250.24(A)(5)
20. Transformers rated over 35,000-volts must be installed in a vault.
a)
True
b)
False
## CORRECT --> SECTION 450.21(C)
2008 NEC Review Practice Test 10
Course Name: 2008 NEC Review
Quiz Number: No. 10
Teacher: Gerald Newton
Teacher's Home Page: http://www.electrician2.com
Teacher's Email: [email protected]
No. of Questions= 20
1.
The feeder neutral may be smaller than the ungrounded conductors in
some cases.
a)
True
b)
False
## CORRECT --> SECTION 220.61(B)
2. An individual branch circuit may supply only one utilization equipment.
a)
True
b)
False
## CORRECT --> ARTIKEL 100 DEFINITION BRANCH CIRCUIT,INDIVIDUAL
3. A 30-ampere branch circuit may supply fixed lighting units in a dwelling.
a)
True
b)
False
## CORRECT --> SECTION 210.23(B)
4.
A rating of any one cord-and-plug-connected utilization equipment shall
not exceed 75 percent of the branch-circuit ampere rating.
a)
True
b)
False
## CORRECT --> SECTION 210.23(A)(1)
5.
Heavy-duty type lamp holders are required on branch-circuits having a
rating in excess of 20-amperes.
b)
False
## CORRECT --> SECTION 210.21(A)
6. The branch-circuit rating is determined by the conductor ampacity.
a)
True
b)
False
## CORRECT --> The branch circuit rating is determined by the size of the overcurrent protective
device.SECTION 210.3
7.
The wall switch controlled lighting outlet required in dwelling unit kitchens
may be a receptacle outlet in lieu of a lighting outlet.
a)
True
b)
False
## CORRECT --> SECTION 210.70 (A)(1)EXCEPTION No 1
8.
Receptacle outlets in bathrooms of dwelling units require ground-fault
circuit interrupter protection.
a)
True
b)
False
## CORRECT --> SECTION 210.8(A)(1)