Question 1

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 2

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

Accepted Answer

C

Question 3

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

According to the National Electrical Code (NEC) section 625.56, the coupling means (charging connector) of an electric vehicle supply equipment (EVSE) should be stored or located at a height of not less than 18 inches above the floor level for indoor locations and 24 inches above the grade level for outdoor locations. Therefore, the best choice is C, 18 inches.

Question 4

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 statement, individual office furnishings or groups of furnishings that are mechanically connected and do not exceed 30 ft can be connected to the building's electrical system by a single flexible cord and plug.

Question 5

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 electric signs and outline lighting systems to ensure they are properly installed and powered. The other options of output wattage, potential lumens, and average load are not as necessary for identifying the manufacturer or rating of the system.

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, which is commonly used in live sound reinforcement and recording situations to combine and balance multiple audio sources. Panel board and signal transformer are not specific to this function, and audio swapper is not a commonly used term in this context.

Question 7

Conductors in pipe organs shall have ____ insulation.

Accepted Answer

Conductor insulation in pipe organs should be able to withstand high temperatures and must be durable. Thermoplastic or thermosetting insulations have both of these properties and are commonly used in electrical systems where high heat resistance is required. Standard polymer insulation may not be able to withstand the high temperatures present in a pipe organ, and thermoelastic or thermo-molded insulations are not commonly used in electrical systems. Hybrid plastic/polymer insulations are not a common type of insulation and may not have the necessary properties for use in a pipe organ.

Question 8

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 9

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 10

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

The question specifically mentions "liquidtight flexible nonmetallic conduit" as a permitted wiring method on the counterweight assembly and car assembly in elevators. Therefore, choice C of "liquidtight flexible" is the correct answer. The other choices, A and D (rigid sealed and liquidtight rigid), are not mentioned in the question as permitted wiring methods, and choice B of "flexible hybrid" is not a commonly recognized type of conduit.

Question 11

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

Accepted Answer

Branch circuits and feeders in a separately derived 60-volts to ground system shall be provided with a means to simultaneously disconnect all ungrounded conductors to ensure safety during maintenance, repairs, or emergencies. This is required by the National Electrical Code (NEC) to protect workers from electric shock and injury. While protecting from lightning discharges is important, it is not specifically required for this type of system. Preventing current surges and permitting service access are also important but not the primary concern in this case.

Question 12

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 13

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

Accepted Answer

The answer of Neon tubing's length and design shall not...

Question 14

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

Drain holes are necessary to prevent water accumulation in wet locations.

Question 15

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

Accepted Answer

The minimum conductor size for traveling cables that feed lighting circuits is 14 AWG copper. This is based on standard electrical code requirements to ensure safety and adequate current carrying capacity for lighting circuits.

Question 16

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 17

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.

Question 18

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 19

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

Accepted Answer

The NEC (National Electrical Code) requires that all 15- and 20-ampere receptacle outlets used in technical applications shall be GFCI (Ground-Fault Circuit Interrupter) protected.

Question 20

The power source for a pipe organ shall be a transformer-type rectifier having a direct current (dc) potential of ____ volts or less.

Accepted Answer

The National Electrical Code (NEC) specifies that the power source for a pipe organ should have a direct current (dc) potential of 30 volts or less for safety reasons.

Quiz 19: Specific Equipment