Module 11 Concept Test
The longer slot on a 125V, 15A duplex receptacle indicates the _____.
neutral conductor
Which of the following statements about lighting control systems is correct?
Lighting must be provided near HVAC equipment.
General lighting loads are calculated based on a factor of _____ per square foot of living space.
3VA
Type NM cable must be secured at intervals not exceeding _____ feet.
4 1/2
A current imbalance as low as _____ will trip a GFCI device.
4mA
When installing a residential service drop where the voltage is limited to 300V to ground, the NEC® required height above a residential driveway is _____ feet.
12
A residence with five 120V circuits and four 240-volt circuits would require a circuit breaker panel with at least _____ spaces.
13
Service drop conductors for which no more than 6′ of the conductors travel over no more than 4′ of a roof overhang may be installed a minimum distance of _____ inches above a roof.
18
When calculating the electric service load, the demand factor used when calculating the general lighting load is _____ percent for the first 3,000VA.
100
Which of the following statements about equipment grounding systems is incorrect?
A metal motor housing in a damp basement does not need to be grounded.
Which of the following statements about panelboard location is incorrect?
A panelboard located away from the meter and disconnect is called a subassembly.
Which of the following statements about electrical installations around pools and spas is incorrect?
GFCI receptacles are required only near hot tubs.
Which of the following statements about outlet boxes is incorrect?
Boxes must be mounted flush with all finished walls.
Which of the following cannot be used as a grounding electrode?
Buried metal gas piping
A metal underground water pipe can serve as the sole grounding electrode.
False
All metal objects are suitable for use as rod-type grounding electrodes.
False
Both heating elements in an electric water heater have to be considered when calculating the conductor size and overcurrent protection.
False
Electric dryer loads are always computed by assigning a 5,000VA load to the dryer.
False
Only 15A circuits can be used for the lighting load.
False
The area of an unfinished basement must be considered when calculating the general lighting load of a residence.
False
The number of grounding conductors in an outlet box has no bearing on the number of current-carrying conductors in the box.
False
Type MC cable may be embedded in masonry in damp locations.
False
Which of the following statements about service entrance cable is incorrect?
SER cable is for underground use.
A GFCI receptacle can provide ground-fault protection to other non-GFCI receptacles in the same circuit.
True
Conductors in conduit buried 20 inches below the floor are considered outside of the building.
True
In a properly wired three-way switch circuit, both switches must be in the up position or the down position for the lamp to be energized.
True
The neutral conductor in single-phase residential electrical services is usually smaller than the hot conductors.
True
The required amperage rating of residential service size is found by dividing the total volt-amp load by the highest voltage.
True
Low-voltage lighting control systems are less expensive than conventional lighting systems because the wiring and other components are smaller and less expensive.
True
Romex® is another name for_____.
Type NM cable
Which of the following statements about combination receptacles is incorrect?
Voltage is restricted to 120V.
The use of ______ is prohibited as a grounding electrode conductor when in direct contact with masonry.
aluminum
Which of the following residential locations would not require GFCI protection?
bedroom receptacle
Conductors extending from a panelboard's overcurrent device to the outlet(s) are _____.
branch circuits
On electrical drawings, a branch circuit run above a ceiling is indicated by _____.
dashed lines
On electrical drawings, the number of current-carrying conductors in a branch circuit is indicated by _____.
slash marks across the circuit
Which of the following methods cannot be used to connect the grounding electrode conductor to electrodes?
soldering
A round symbol in the center of the room with lines going to other round symbols and the designation S3 indicates _____.
the fixture can be energized from different locations
An example of a grounded conductor is _____.
the neutral wire in a three-wire electrical service
The two remaining terminals on a three-way switch (other than the common) are called _____ terminals.
traveler
Each kitchen in a residence requires at least _____ 120-volt, 20A small appliance branch circuits.
two
Use a _____ in combination with two three-way switches to control a lamp from three different locations.
four-way switch