Question 1

Each hoistway elevator pit shall have at least one ____-volt, single phase, 15- or 20-ampere duplex receptacle

Accepted Answer

C

Question 2

DC power shall be supplied by a listed dc power supply with a maximum output of ____ volts.

Accepted Answer

The question states that the maximum output of the listed DC power supply should be provided, and the highest option given is 30 volts. Therefore, option D is the best choice.

Question 3

Neon tubing's length and design shall not cause a continuous overcurrent beyond the capacity of the transformer or ____.

Accepted Answer

C

Question 4

A separately derived ____ with 60 volts on each of two ungrounded conductors to a grounded neutral conductor can be used to reduce objectionable noise in sensitive electronic equipment locations.

Accepted Answer

The answer of A separately derived ____ with 60 volts...

Question 5

Branch circuits and feeders in a separately derived 60-volts to ground system shall be provided with a means to ____.

Accepted Answer

According to NEC 250.30(B), branch circuits and feeders in separately derived systems must be provided with a means to simultaneously disconnect all ungrounded conductors. This is necessary for safety reasons as it ensures that all power to the circuit is cut off in the event of an emergency. A means of disconnecting also allows for easy access for servicing and maintenance. While protecting against lightning discharges is important, it is not directly related to branch circuit and feeder requirements in a separately derived system. Similarly, preventing current surges does not necessarily require a means of disconnecting, and allowing for service access is only one aspect of the overall requirement.

Question 6

Equipment used to combine and level-match a multiplicity of electronic signals, as from microphones, electronic instruments, and recorded audio is referred to as a(n) ____.

Accepted Answer

The equipment described is a mixer, used to combine and level-match multiple electronic signals from various sources such as microphones, electronic instruments, and recorded audio. Panel board and signal transformer do not accurately describe this type of equipment, while audio swapper is not a commonly used term in the audio industry.

Question 7

Individual office furnishings of the freestanding type, or groups of individual office furnishings that are electrically connected, are mechanically contiguous, and do not exceed 30 ft when assembled, shall be permitted to connect to the building's electrical system by means of a ____.

Accepted Answer

According to the description in the sentence, individual office furnishings or groups of individual office furnishings that are not exceeding 30 ft when assembled can connect to the building's electrical system by means of a single flexible cord and plug.

Question 8

Electric signs and outline lighting systems shall be marked with the manufacturer's name, trademark or other identification, ____, and current rating.

Accepted Answer

The input voltage is important information for the safe installation and operation of electric signs and outline lighting systems. The manufacturer's name, trademark or other identification and current rating are also necessary for identification and safety purposes. Output wattage, potential lumens, and average load are not typically marked on the sign or lighting system itself.

Question 9

Conductors in pipe organs shall have ____ insulation.

Accepted Answer

Conductors in pipe organs need to be able to withstand high temperatures, as they are placed near heated parts of the instrument. Both thermoplastic and thermosetting insulation are able to handle these high temperatures and are commonly used in electrical wiring for this reason. Standard polymer insulation may not be able to handle the heat, and thermoelastic or thermo-molded insulation may not be as widely available or suitable for this application. Hybrid plastic/polymer insulation may be an option, but it would depend on the specific properties of the material and its ability to withstand high temperatures.

Question 10

Article 647 covers the installation and wiring of sensitive electronic equipment that is connected to a separately derived system operating at ____ volts line-to-line and 60 volts to ground.

Accepted Answer

Article 647 covers the installation and wiring of sensitive electronic equipment that is connected to a separately derived system operating at 120 volts line-to-line and 60 volts to ground.

Question 11

Electric signs and outline lighting system equipment in wet locations, unless of the listed watertight type, shall be weatherproof and, if necessary, have ____ in accordance with 600.9(D)(1) through (3).

Accepted Answer

The equipment should have drain holes to prevent the accumulation of water.

Question 12

The minimum conductor size for traveling cables that feed lighting circuits is ____ AWG copper.

Accepted Answer

The National Electrical Code (NEC) requires a minimum conductor size of 14 AWG copper for traveling cables that feed lighting circuits.

Question 13

Flexible metal conduit, ____ metal conduit, liquidtight flexible nonmetallic conduit, and flexible cords and cables are permitted wiring methods are permitted on the counterweight assembly and on the car assembly in elevators.

Accepted Answer

Liquidtight flexible nonmetallic conduit is specifically mentioned as a permitted wiring method on the counterweight assembly and on the car assembly in elevators, whereas rigid sealed and liquidtight rigid conduits are not mentioned. Flexible hybrid conduit is not a recognized type of conduit.

Question 14

Circuit voltage of heating/air-conditioning equipment branch circuits located on the elevator car shall not exceed ____ volts.

Accepted Answer

The answer of Circuit voltage of heating/air-conditioning equipment branch circuits...

Question 15

A luminaire intended for installation in a pool or fountain structure's forming shell, where completely surrounded by water is referred to as ____.

Accepted Answer

A luminaire intended for installation in a pool or fountain structure's forming shell, where completely surrounded by water is referred to as a wet niche luminaire. The other options are not correct definitions for this specific type of luminaire.

Question 16

A pipe organ should use a minimum of ____ AWG conductors for electronic signal circuits, and at least 26 AWG for electromagnetic valve supply.

Accepted Answer

The answer of A pipe organ should use a minimum...

Question 17

Neon tubing secondary conductor(s) shall be supported within ____ in.of the electrode connection.

Accepted Answer

The answer of Neon tubing secondary conductor(s) shall be supported...

Question 18

An electric vehicle supply equipment's coupling means shall be stored or located at a height of not less than ____ in. above the floor level for indoor locations and 24 in. above the grade level for outdoor locations.

Accepted Answer

For indoor locations, the coupling means of electric vehicle supply equipment must be stored or located at a height of not less than 18 inches above the floor level.

Question 19

LFNC of ____ in. nominal trade size or larger, as defined in 356.2(2), can be installed in escalators or moving walkways in lengths greater than 6 ft.

Accepted Answer

The answer of LFNC of ____ in. nominal trade size...

Question 20

All ____ receptacle outlets used in technical applications shall be GFCI protected.

Accepted Answer

According to the question, the receptacle outlets used in technical applications shall be GFCI protected. Both 15- and 20-ampere receptacle outlets are commonly used in technical applications. Therefore, the best choice would be A, which includes both 15- and 20-ampere receptacle outlets.

Quiz 19: Specific Equipment