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| 1. The unit of electric current is: |
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Definition
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2. The name given to the force driving electron flow between positive and negative
terminals is: |
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Definition
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| 3. The “ohm” is a unit of measurement for: |
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| 4. In a series circuit, voltages and resistances are: |
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| 5. In a parallel circuit, current at each load depends upon: |
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Definition
| c) the resistance of each load |
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| 6. Direct current can be defined as a condition where: |
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Definition
d) a flow of current takes place at a constant rate in the same direction around
a circuit |
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| 7. Which of the following is not a typical use of dc power? |
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Definition
| a) high-voltage transmission lines |
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| 8. Energy is the technical term for the more common expression: |
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Definition
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| 9. The overall load factor is: |
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Definition
| c) the ratio between the average and maximum power demands of a building |
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| 10. A “ratchet” clause in a utility billing plan is disadvantageous for which type of user? |
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Definition
| b) users with a low yearly load factor |
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11. Devices that carry the description “energy management” have a primary function of
controlling: |
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Definition
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12. What is the primary disadvantage of an automatic instantaneous demand control
system for electric power? |
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Definition
| a) The system cannot readily adapt to varying load patterns. |
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1. A power utility will most likely find overhead transmission economically feasible for
voltages greater than: |
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Definition
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| 2. Which of the following transmission line methods is the most expensive? |
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| 3. A “step-down” transformer: |
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Definition
| a) has a greater number of turns in its primary coil than its secondary coil |
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| 4. In a transformer, ___ remains constant. |
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Definition
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5. A load center pad-mounted unit substation would typically have a primary voltage
range of: |
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Definition
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6. The most popular form of exterior transformer installation for individual buildings
is |
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Definition
| b) mounted on a concrete pad |
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| 7. Oil-insulated transformers can be expensive to install indoors because: |
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Definition
| a) they must be placed in a fire-resistant vault |
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8. The use of nonflammable liquid coolants has largely been discontinued in
transformers because: |
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Definition
| c) the coolants contain PCBs, which are banned in new installations |
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Term
| 9. Which of the following is not a valid electrical switch class? |
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Definition
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Term
| 10. The advantage of using a contactor rather than a switch is that: |
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Definition
| a) a contactor can be remote controlled |
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11. To protect against all types of weather conditions, one should specify an equipment
enclosure of type: |
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Definition
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| 12. A “drawout” switchboard is: |
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Definition
b) a type of switchboard that has circuit breakers mounted in a movable
drawer |
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| 13. Almost all indoor unit substations use ____ transformers. |
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Definition
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14. Which of the following would be a typical dimension of a single-phase
uninterruptible power supply (UPS) unit? |
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Definition
| c) 36 in. x 12 in. x 36 in. (915 x 305 x 915 mm) |
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| 1. Which building electrical sub-system includes panelboards and circuit breakers? |
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Definition
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2. In a typical building electrical power system wiring closet, dry-type transformers are
typically placed between: |
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Definition
| a) plug-in busways and 120-V panelboards |
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Term
| 3. The current rating of an electrical service item is determined by: |
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Definition
| c) the maximum temperature at which its components can operate at full load |
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| 4. Which type of interior wiring system is typically only used in industrial applications? |
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Definition
| b) insulated cables in open raceways |
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Term
| 5. A single conductor of No. 8 AWG standard ____. |
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Definition
| d) is referred to as a “wire” |
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Term
| 6. A conductor’s current-carrying capacity is referred to as its: |
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Definition
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| 7. Use of AC cable is typically confined to: |
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Definition
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Term
| 8. A busway or busduct is ideally used when ______. |
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Definition
| b) it is necessary to carry large amounts of current |
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Term
| 9. The advantage of using a cablebus over a busduct is that: |
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Definition
| d) it has a higher amperes-per-dollar first-cost |
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Term
| 10. Lighting tracks are generally rated at: |
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Definition
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11. Raceways have now become a major architectural consideration that must be
addressed early in the design process because: |
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Definition
a) the proliferation of computers and networking equipment require the
distribution channels to be much wider than before |
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12. In a two-level underfloor duct system, ducts are run near the center of a bay in a
depressed-slab system: |
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Definition
| d) to avoid the steel in beams or joists near columns |
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Term
1. Electrical energy cost is directly related to energy consumption, except in the case
of: |
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Definition
| a) utility demand charges |
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Term
| 2. Which of the following occupancy types exhibits the highest air-conditioning load? |
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Definition
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Term
| 3. A 120/208-V single-phase, three-wire system would be used primarily to serve: |
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Definition
| b) a single family residence or small commercial building |
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4. The best distribution system for a large, multistory building that principally uses
fluorescent or HID lamps is: |
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Definition
| d) 277/480 V, 3-phase, 4-wire |
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Term
5. Which of the following is not a maxim for the safe grounding of a secondary wiring
system? |
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Definition
c) The neutral wire must be color-coded yellow on any insulation color other
than blue, along at least half the conductor length. |
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Term
6. To avoid the risk of electric shock, it is recommended that appliance housings be
grounded to a: |
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Definition
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Term
7. In the design procedure for wiring a building, one would compute panel loads
before: |
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Definition
| d) feeder and protective equipment ratings are computed |
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Term
8. In commercial spaces, an electrical closet might be preferable to a stand-alone
panelboard for a building of ___ or more stories. |
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Definition
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Term
| 9. Which of the following would be a good location for an electrical closet? |
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Definition
a) a location where conduits can enter and leave the location vertically and
horizontally |
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Term
10. Which of the following volt-amperage values would be logical for a 15-A residential
circuit operating at 25% expansion? |
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Definition
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11. To accommodate a home office worker, master bedrooms should be provided with
a minimum of: |
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Definition
a) six duplex 15-A or 20-A receptacles connected to at least two different
circuits |
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12. For the purpose of predicting overall building electrical load, continuous loads
should be calculated at ___ of their actual value. |
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Definition
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13. If a building’s emergency power supply consists of batteries, the batteries must
have a full-load capacity of: |
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Definition
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1. Increases in PV module efficiency, new materials, and other initiatives have brought
the cost of PV (per peak Watt) to about: |
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Definition
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Term
| 2. “Insolation” is best defined as: |
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Definition
| c) the amount of solar energy received by a given area, measured in Wh/m2 |
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Term
| 3. An “inverter” is a device that: |
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Definition
| b) changes direct-current to alternating-current |
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4. Today’s commercial two-layer PV arrays have a maximum insolation-to-electric
energy conversion rate of: |
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Definition
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5. The tilt angle of a PV array, to capture maximum insolation when the sun is lowest,
should be: |
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Definition
| c) equal to the site latitude plus 15 degrees |
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| 6. A tracking array can increase the insolation per PV module unit area by: |
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Definition
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7. A direct-connected PV array might be used powering an application such as filling an
elevated water tank because: |
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Definition
| d) a slow, interruptible fill rate does not adversely affect the water’s usability |
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8. A PV system battery is generally expected to supply all of an installation’s electrical
requirements for a period of ___ days of cloudy weather. |
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Definition
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Term
| 9. Which PV system battery type requires the least maintenance? |
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Definition
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Term
10. The primary difference in design for a stand-alone PV system and for a gridconnected
system is that: |
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Definition
b) a stand-alone system must provide the entire electric load, while a gridconnected
system may provide part of the load |
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Term
11. Which of the following is not a factor for determining the system requirements for a
stand-alone PV array? |
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Definition
| d) the reliability of the local electric grid |
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Term
| 12. The acronym BIPV stands for: |
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Definition
| c) building integrated photovoltaic |
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