ELECTRICAL 200
A subpanel is supplying a 3-ton air conditioner (running load amps = 18A) and an electric dryer (5000W). The 10 gauge copper subpanel feed wire is connected to a 60A breaker in the main panel. You should - (a) Report the installation as okay (b) Recommend changing the size of the feed wire to match the breaker (c) Recommend changing the size of the breaker to match the feed wire (d) Recommend switching to a gas dryer
B
Assuming copper, standard wire type, and normal temperature rating, what is the typical conductor size (in awg) for a 60 A service in your country? (a) #10 (b) #6 (c) #4 (d) #3
B
Which of the following is designated abbreviation for underground feeder cables? (a) UFC (b) UF (c) USE (d) UGFC
B
Approximately 9,999 homes out of 10,000 have _____ service entrance wires. (a) One (b) Two (c) Three (d) Four
C
In a multi-wire branch circuit, with the red and black wire improperly tapped from the same bus, if the red wire carries 10 amps, and the black wire carries 12 amps, the neutral wire will carry - (a) 2 amps (b) 10 amps (c) 22 amps (d) It won't carry any, since the 15A breaker will trip.
C
In most areas, for what distance can service entrance wires run inside the building before going into the service box, without special permission? (a) 5 feet. (b) 10 feet, if in conduit. (c) 0 feet, or as short as possible. (d) Maximum of 3 feet.
C
Overheating is commonly caused by any one of these except - (a) A defective fixture (b) Oversized bulbs (c) Bulbs installed with the base down (d) A loose connection
C
The best location for an outlet is - (a) On a floor (b) On a counter top (c) Immediately beside a basin in a bathroom (d) Immediately beside a bathtub in a bathroom
C
The resistance of an electrical current is measured in? (a) volts (b) Amps (c) Ohm (d) Watts
C
What is linking? (a) Linking ensures that light switches only operate the fixtures installed in the same room. (b) Linking is the same as bonding. (c) Linking ensures that two fuses or circuit breakers are disconnected at the same time. (d) Linking refers to connections made in a junction box.
C
What is the minimum size equipment grounding copper conductor for a circuit with a 400-ampere over current device? (a) #1 (b) #2 (c) #3 (d) #4
C
Which of the following wiring methods allows a maximum of four ninety-degree bends between junction boxes? (a) Type ENT (b) Type IMC (c) Type RMC (d) Type EMT (e) all of the above
E
A 14 gauge copper wire is protected by a 20-amp fuse. You should report that - (a) This is a defect, and recommend improvement. (b) This is always allowable. (c) This indicates poor wiring. (d) This may be acceptable, depending on what the circuit load is.
A
A ground fault is? (a) A short circuit (b) A ground wire (c) Electrical pressure (d) Electrical resistance
A
A wall mounted luminaire weighing a maximum of _____ pounds is permitted to be supported on boxes other than those specifically designed for luminaries, provided the luminaire is secured to the box with at least two No. 6 or larger screws. (a) 6 (b) 10 (c) 14 (d) 18
A
All of the following are common outdoor wiring problems except: (a) Nmw wiring used outdoors (b) Garage door openers powered with an extension cord (c) Unprotected wires within four feet of the garage floor (d) Wires run across roof surfaces
A
All of the following are good insulators except: (a) Gold (b) Air (c) Ceramics (d) Glass
A
All of these are common branch circuit problems except - (a) NMD wires run through floor joists without tubes or grommets. (b) Damaged wires (c) Open splices (d) Wires run under carpets
A
Common junction box problems include all of the following except - (a) Wire nuts inside boxes (b) Missing boxes (c) Boxes missing cover plates (d) Overcrowded boxes
A
Extension cords are - (a) Stranded wire (b) Solid wire (c) Designed to be held in place with staples (d) Best protected if run under carpets
A
If you have 10 gauge copper wire rated for amperage what size aluminum wire would you need? (a) 8 (b) 6 (c) 10 (d) 12
A
In a wall constructed of wood or other combustible material, outlet boxes shall be installed so that the front edge of the box is set back a maximum of ________ from the finished surface. (a) 0 inches; (the box must be flush or project) (b) 1/8 inch (c) 1/4 inch (d) 3/8 inch
A
Knob-and-tube wire buried in insulation - (a) Is not permitted in some jurisdictions if the insulation is combustible (b) Makes it hard to work on the wiring (c) Insures the wires won't come in contact with each other (d) Is never permitted
A
Lighting track shall be located a minimum of _________ above the finished floor unless protected from physical damage or the track operates at less than 30 volts rms open circuit voltage. (a) 5 feet, 0 inches (b) 6 feet, 0 inches (c) 6 feet, 4 inches (d) 6 feet, 8 inches
A
Loose connections - (a) May start fires (b) Are always easy to identify (c) Are never located in junction boxes (d) Are never found in panels
A
Ohm's Law, the relationship between voltage, current, and resistance in a simple circuit, states - (a) V=IR (b) I=VR (c) R=VI (d) R=I/V
A
The live wire in the electrical outlet is: (a) black (b) white (c) green (d) red
A
What do you call the wire that connects the system neutral to the water supply, well casing or ground rods? (a) The grounding electrode conductor (b) The grounded conductor (c) The electrode (d) The ground fault interrupter
A
What is a measure of the force in an electrical system? (a) volts (b) amps (c) ohms (d) watts
A
What is the minimum size of branch service connectors? (a) 14 copper or 12 aluminum (b) 12 copper or 10 aluminum (c) 10 copper 14 aluminum (d) 14 aluminum 12 copper
A
What size copper wire should be used with a 20-amp breaker? (a) 12 (b) 10 (c) 8 (d) 6
A
Where nonmetallic-sheathed cable is used, the cable assembly including the sheath shall extend into the box a minimum of ________ through a nonmetallic-sheathed cable knockout opening. (a) 1/4 inch (b) 3/8 inch (c) 1/2 inch (d) 3/4 inch
A
Which of the following devices are most likely to be rated co/alr? (a) Receptacles (b) Light fixtures (c) Wire nuts (d) Panels
A
Cord-connected luminaires (fixtures), hanging luminaires (fixtures), lighting track, pendants, and ceiling suspended paddle fans shall not have any parts located within a zone measured _______ feet horizontally and _______ feet vertically from the top of a bathtub rim or shower stall threshold. This zone is all encompassing and includes the zone directly over the tub or shower. (a) 2/6 (b) 3/8 (c) 2/7 (d) 3/6
B
In order to be used as a part of the grounding electrode system, interior metal water pipes shall be located a maximum of __________ feet from the entrance to the building. (a) 3 (b) 5 (c) 6 (d) 10
B
Number 10 gauge wires are typically used for all of these except - (a) Air conditioners. (b) Clothes dryers. (c) Dishwashers. (d) Cooktops.
B
Special grease on aluminum wires - (a) Is found on number 12 and 10 gauge wires (b) Is found on stranded wires (c) Is found on service entrance wires only (d) Is used to control creep
B
The size of a fuse should be: (a) Larger than the rating of the wire. (b) The same as or smaller than the rating of the wire. (c) The same as the panel rating. (d) Based on the total load of the circuit.
B
The unit for the measure of electrical power is - (a) Amps (b) Watts (c) Joules (d) kWh
B
What is the minimum burial cover requirement for a rigid metal conduit buried beneath a minimum of four inch thick concrete exterior slab with no vehicular traffic? (a) 2 inches (b) 4 inches (c) 6 inches (d) no minimum requirement
B
What size aluminum wire should be used with a 20-amp breaker? (a) 12 (b) 10 (c) 8 (d) 6
B
Where metallic plugs or plates are used with nonmetallic enclosures, they shall be recessed a minimum of ___________ inch from the outer surface of the enclosure. (a) 1/8 (b) 1/4 (c) 3/8 (d) 1/2
B
Where three or more conductors of minimum size _________ AWG are run at angles with joists in unfinished basements, additional protection is not required if the cable assembly is attached directly to the bottom of the joists. (a) 6 (b) 8 (c) 10 (d) 12
B
A loose connection is? (a) Not dangerous (b) Routine (c) Similar to a damaged wire (d) Overload
C
All switches shall be installed so that the center of the grip of the operating handle, in its highest position, shall be located a maximum of ________ above the floor or working platform (a) 6 feet, 0 inches (b) 6 feet, 6 inches (c) 6 feet, 7 inches (d) 6 feet, 9 inches
C
At least one receptacle outlet accessible at grade level and not more than _______ feet above grade shall be installed outdoors at the front and back of each dwelling unit having direct access to grade. (a) 5 3/4 (b) 6 (c) 6 1/2 (d) 6 3/4
C
Conductors in raceways shall be continuous between outlets and junctions and shall be without _______ or _______ in the raceway. (a) insulation/color (b) protection/limits (c) splices/taps (d) threads/bends
C
Disadvantages of pig-tailing aluminum to copper wire are - (a) The two metals are not compatible (b) You can't get wire nuts designed for this purpose (c) Adds more connections and leads to overcrowding boxes (d) You can't pigtail different sized wire gauges together
C
Grounding guards against? (a) Fire (b) Shock (c) Both of the above (d) Coupling
C
How many milli amps does it take to trip a GFCI outlet? (a) 1 to 4 mil. (b) 2 to 4 mil (c) 5 to 8 mil (d) 10 to 20 mil
C
How many seconds does it take to trip a GFCI? (a) 1/100th second (b) 1/16th second (c) 1/40th second (d) 2/40th second
C
If there is an incandescent light it must be what minimum distance from shelving? (a) 3" (b) 6" (c) 12" (d) 24
C
If you used a multi-meter to measure the current in a 3000W electric water heater that uses both of the ungrounded ("hot") service conductors, it would read - (a) 25A (b) 240V (c) 12.5A (d) 120V
C
The end of the neutral wire from a 3-conductor cable is overheating. The reason for this could be any of these except - (a) The wire is loose (b) The circuit breakers are undersized (c) Both sides of the multi-wire circuit are drawing from the same bus (d) The wire is nicked
C
The main service fuses have been installed with the labels facing backward, not allowing you to read their rating. No other markings are visible. You should - (a) Turn off the house power and remove a fuse to check its rating. (b) Measure the diameter of the fuse body to determine its rating. (c) Report that the main service fuse rating was not determinable. (d) Carefully insert your inspection mirror until the label is visible, then read the rating from the label.
C
The service drop wires - (a) Are a reliable indicator of service size (b) Are usually the homeowner's responsibility (c) Connect to the house at the drip loop (d) Must always be in conduit
C
You notice rust in the service panel. Which of the following may be the cause? (a) No drip loop (b) Undersized conduit (c) Damaged masthead (d) Both (a) and (c)
D
ll of these are common receptacle problems except - (a) Damaged receptacles (b) Loose receptacles (c) Overheated receptacles (d) GFI receptacles used outdoors
D
All conductors of a circuit, including equipment grounding conductors, shall be contained in which of the following? (a) The same raceway (b) The same trench (c) The same cable (d) The same cord (e) All of the above
E
Which of the following for grounding electrodes is not a correct statement? (a) Electrodes of pipe or conduit shall not be smaller than 3/4 inch trade size and, where of iron or steel, shall have the outer surface galvanized or otherwise metal-coated for corrosion protection (b) Electrodes of rods of iron or steel shall be at least ⅜ inch in diameter. Stainless steel rods less than ⅛ inch in diameter, nonferrous rods or their equivalent be listed not less than 1/2 inch in diameter (c) Aluminum electrodes with a minimum diameter of 3/4 inch are permitted in wet locations, with a minimum length of 10 feet (d) All the above
C
Wires should not be run across the tops of ceiling joists in attics unless - (a) The ceiling is not insulated (b) The wire is painted red and any junction boxes are also red (c) The attic height is less than 40 inches (d) Wires run under carpets
C
A convenience receptacle outlet shall be installed for the servicing of heating, air-conditioning and refrigeration equipment located in attic and crawl spaces. The receptacle shall be accessible and shall be located on the _______ _______ and within _______ feet of the heating, air-conditioning and refrigeration equipment. Do not consider exceptions. (a) equipment wall/10 (b) equipment support/15 (c) control panel/20 (d) same level/25
D
A kitchen split receptacle is - (a) A stove circuit (b) A switched circuit operating a wall receptacle (c) A receptacle with a test button required near kitchen sinks (d) A receptacle with the top and bottom halves on different circuits
D
A multi-wire circuit has - (a) Protection from circuit breakers, not fuses. (b) Two neutral wires. (c) Two ground wires. (d) A red and a black wire.
D
A properly polarized circuit - (a) Has the black wire connected to the silver screw on the receptacle (b) Has the black wire powering the wide slot on the receptacle (c) Has the neutral and ground connections bonded together at the receptacle (d) Will result in the threaded collar of a lamp being neutral
D
An ungrounded conductor is - (a) Un-insulated (b) Called The Neutral (c) Usually White In Color (d) Often called the hot conductor
D
Ceiling suspended paddle fans weighing a maximum of _________ are permitted to be supported by outlet boxes identified for such use. (a) 18 pounds (b) 25 pounds (c) 32 pounds (d) 35 pounds
D
Common branch circuit wire materials include all of these except - (a) Copper. (b) Aluminum. (c) Copper clad aluminum. (d) Silver-dipped copper.
D
Each appliance shall be protected against over current in accordance with the rating of the appliance and its listing. When providing over current protection for a single nonmotor-operated appliance, which of the following is an approved method of protection? (a) The over current protection shall not exceed that marked on the appliance (b) If the over current protection rating is not marked and the appliance is rated 13.3 amperes or less, not exceeding 20 amperes (c) If the over current protection rating is not marked and the appliance is rated over 13.3 amperes, not exceed 150 percent of the appliance rated current (d) All the above would apply
D
Electrical nonmetallic tubing is an allowable wiring method in all but which one of the following applications? (a) Feeders (b) Branch circuits (c) Embedded in masonry (d) Direct burial
D
Floor receptacle outlets cannot be counted as part of the required number of receptacle outlets unless located a maximum of ______ inches from the wall. (a) 4 (b) 6 (c) 12 (d) 18
D
For feeders supplying electric dryers, what is the percentage of the maximum unbalanced load on the ungrounded conductors that is calculated for the feeder neutral load? (a) 100% (b) 90% (c) 80% (d) 70%
D
In a distribution panel, a black wire and a red wire are connected to separate breakers that are four breakers apart, on the same bus bar. Both wires are part of the same cable. The neutral from the cable connects to the neutral bus. The potential problem with this arrangement is - (a) The 240V appliance may not operate properly. (b) Breakers may not be linked. (c) The neutral wire may overheat. (d) All of the above.
D
In general, modern 120V circuits can accommodate how many outlets and/or light fixtures? (a) 6 (b) 8 (c) 10 (d) 12
D
Knob-and-tube wiring issues include all of the following except - (a) Connections to modern wire not in boxes (b) Wires buried in insulation (c) Brittle wire, insulation or sheathing (d) Over-heated neutrals on multi-wire branch circuits
D
Light fixtures are needed in all the following locations except - (a) Stairwells with more than six treads (b) Each room (c) On the outside of the home near every exterior door (d) In clothes closets
D
Modern houses have how many volts available? (a) 60 volts (b) 120 volts (c) 210 volts (d) 240 volts
D
NMD cable is - (a) Rigid. (b) Armored. (c) Metal clad. (d) Suitable for indoor use.
D
Panels used with aluminum wire should - (a) Be circuit breaker rather than fuse-type (b) Be rated for at least 100 amps (c) Contain at least 20 branch circuits (d) E rated cual
D
Putting a penny in a fuse holder is dangerous because - (a) The penny will melt, causing a short circuit (b) The penny will corrode, leading to overheating (c) The circuit has no over-current protection (d) The penny will fit in the slot very tightly so may not be removable
D
Subpanels are - (a) Prohibited in bathrooms. (b) Prohibited in clothes closets. (c) Prohibited in garages. (d) Both a. and b.
D
The dimension of the working space in the direction of access to panelboards and live parts likely to require examination, adjustment, servicing or maintenance while energized shall be not less than _______ in depth. (a) 36 inches (b) 3 feet (c) 914 mm (d) all the above
D
The standard house voltage is - (a) 100A (b) 120V (c) 120/208V (d) 120/240V
D
Twist-on connectors (wire nuts) - (a) Replace junction boxes. (b) Are not permitted on knob-and-tube wiring. (c) Are not permitted on aluminum wiring. (d) Are also called solderless connectors.
D
Underground service conductors not encased in concrete and buried 18 inches or more below grade shall have their location identified by a warning ribbon placed a minimum of _________ above the underground installation. (a) 4 (b) 6 (c) 8 (d) 12
D
What are the luminaire (fixture) installation clearance requirements for a Type IC recessed luminaire (fixture) to combustible materials? (a) .5 inch (b) 1.0 inch (c) 1.5 inches (d) 0.0 inch
D
What is the minimum burial cover requirement for nonmetallic raceways listed for direct burial without concrete encasement or other approved raceways under streets, highways, roads, alleys, driveways, and parking lots? (a) Six inches (b) Twelve inches (c) Eighteen inches (d) Twenty four inches
D
What is the required amount of clear working space in front of an energized electrical panelboard? The workspace shall be clear and shall extend from the floor or platform to a height of _______. (a) 6 feet (b) 6.5 feet (c) 6 feet 6 inches (d) both b & c
D
What is the required receptacle rating for a 20-ampere branch circuit supplying two or more receptacles or outlets? (a) 15 amperes only (b) 20 amperes only (c) 30 amperes only (d) 15 amperes or 20 amperes
D
When looking at a potlight you see the letters IC. This means it is - (a) For incandescent bulbs only (b) To be controlled by an Integrated circuit (c) To be used on Interior Ceilings only (d) For use in Insulated Ceilings
D
When you find three-slot receptacles on ungrounded circuits, you might recommend any of the following except - (a) Replace the circuit with a grounded circuit (b) Run a ground wire to a metal supply-plumbing pipe that runs back to the ground (c) Fill the ground hole with epoxy, if permitted by authority (d) Label the circuit at the panel "ungrounded"
D
Which of the following aluminum wire installations is most likely to overheat? (a) a receptacle that powers a television and a stereo (b) A receptacle with a lamp (c) A receptacle with a computer (d) A receptacle with an electric heater
D
Which of the following continuous colors is permitted for ungrounded conductors? (a) Gray (b) White (c) Green (d) Red
D
Which of the following is not a good conductor? (a) Copper (b) Aluminum (c) Silver (d) Plastic
D
Which of these wires is a home inspector required to inspect? (a) Telephone wiring (b) Security wiring (c) Cable television wiring (d) Wiring for a clock receptacle
D
