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Question | Answer |
---|---|
The power supply to a mobile home shall generally be a feeder assembly consisting of not more than one listed ? -ampere mobile home power-supply cord or permanently installed feeder. | 50 The correct answer is: 550.10(A) |
A nursing home providing 24-hour care for four patients or fewer is not considered a health care facility. | False The correct answer is: 517.2 |
All receptacles installed at the patient bed location in a general care area shall be ? . | listed “hospital grade” The correct answer is: 517.18(B) |
When a recreational vehicle has only one 20-ampere branch circuit, it shall be GFCI protected. | True The correct answer is: 551.40(C) |
The service disconnecting means for a mobile home shall be suitable for use as service equipment and be mounted within sight and not more than ? from the mobile home it serves, when the service equipment is not located adjacent to the mobile home. a. 8' | 30 The correct answer is: 550.32(A) |
Receptacles rated at 50-amperes for recreational vehicle park site distribution shall be supplied from a ? . | ranch circuit of the voltage class and rating of the receptacle The correct answer is: 551.72 |
The service equipment for a floating building shall be located adjacent to, but not in or on, the floating building. | True The correct answer is: 553.4 |
A park trailer is defined as a unit built on a single chassis mounted on wheels and has a gross trailer area not exceeding ? in the set-up mode. | 400 ft2 The correct answer is: 552.2 |
When Type PVC conduit is used for underground wiring of gasoline dispensing pumps, the last ? of the underground run shall be Type RMC or Type IMC threaded conduit. | 2 feet The correct answer is: 514.8 Exception No. 2 |
A commercial parking garage used only for parking vehicles which operate on volatile flammable liquids is ? . | permitted to be unclassified |
The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home. | false The correct answer is: 550.16(A)(1) |
The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home | False The correct answer is: 550.16(A)(1) |
Under no condition shall the service entrance conductors for a manufactured building be installed before the erection of the building at the building site. | False The correct answer is: 545.6 Exception |
Mobile home service equipment shall be rated at not less than ? amperes at 120/240 volts. | 100 The correct answer is: 550.32(C) |
The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home. | False The correct answer is: 550.16(A)(1) |
Each patient bed location in a critical care area of a hospital shall be equipped with a minimum of ? receptacles. | 14 The correct answer is: 517.19(B)(1) |
An outdoor mobile home service disconnecting means is located 12 inches above ground level. Acceptable or Violation? | Violation 550.32(F) |
Lesson 2 Qestions | Lesson 2 Questions |
Premises wiring primarily includes exterior wiring and does not include interior wiring. T/F | False |
The most common nominal battery voltage for a lead-acid battery is ? | 2 480.2 |
Capacitors shall be enclosed in vaults or outdoor fenced enclosures in compliance with the applicable provisions of Article 110 when they contain more than ? gallons of flammable liquid. | 3 460.2(A) |
#6 A thermal barrier shall be installed between resistors and combustible material when the distance is less than ? . | 12" 470.3 |
Premises wiring primarily includes exterior wiring and does not include interior wiring. TF | False Article 100 |
The most common nominal battery voltage for a lead-acid battery is ? | 2 480.2 |
Article 450 covers the installation of all transformers. TF | False The correct answer is: 450.1 Exception No. 1 |
In general, dry-type transformers rated over 112 1/2 kilovolt-amperes installed outdoors shall not be located within ? of combustible materials of buildings. | 12" 450.22 There are transformer designs which do not require a 12" separation from combustible materials of buildings. |
A thermal barrier shall be installed between resistors and combustible material when the distance is less than ? . | 12" 470.3 |
In general, the ampacity of the conductors from the generator terminals to the first overcurrent device shall not be less than ? of the nameplate current rating of the generator. | 115% : 445.13 |
A sealed battery or battery cell must be equipped with ? or be designed to prevent ? . | 1. a pressure release vent to prevent excessive accumulation of gas 2.scatter of cell parts in the event of cell explosion |
A door knob operated by turning and pushing to open the door is not permitted on the personnel exit door of a transformer vault doorway. | True 450.43(C) Note: Transformer vaults are required to have personnel doors which swing out and are equipped with devices which are normally latched, but open under simple pressure such as “panic bars.” |
The ampacity of the capacitor circuit conductors for a capacitor bank shall not be less than ? of the rated current of the capacitor. | 135% 460.8(A) |
Where accessible to unqualified persons, generators shall have no live parts exposed to accidental contact when the generator operates at more than ? volts to ground. | 50 445.14 |
A ? battery is defined as a battery comprised of one or more rechargeable cells of the lead-acid, nickel-cadmium, or other rechargeable electro-chemical-types. | storage 480.2 |
For other than motor starting service, insulated conductors installed between a resistive element and a controller shall have an insulation with an operating temperature of not less than ? where installed in accordance with Article 470. | 90°C 470.4 |
The rating of disconnecting means for a bank of capacitors shall not be less than ? of the rated current of the capacitor bank. | 135% 460.8(C)(3) |
Article ? covers the general requirements for equipment operating at more than 1,000 volts, nominal. | 490 |
Lesson 3 | |
The basic PV device which generates electricity when exposed to light is called a(n) ? . | solar cell 690.2 |
Portable or mobile signs in wet or damp locations shall be provided with a manufacturer-supplied ? . | ground-fault circuit interrupter 600.10(C)(2) |
Article 668 covers electrolytic cells used as a source of electric energy and for cells used for the production of hydrogen. TF | false 668.1 |
Branch-circuit conductors supplying information technology equipment shall have an ampacity of not less than ? of the total connected load | 125% 645.5(A) |
Type AC cable is used as a branch circuit to supply receptacles for information technology equipment. The Type AC cable is installed under an accessible area, under a raised floor of approved construction. The cable is installed in accordance with 300.11. Violation or Acceptable? | Acceptable 645.5(E) |
A(n) ? branch circuit shall supply the elevator hoistway pit lighting and receptacle(s). | separate |
Which of the following cables would not be permitted as an output cable to the electric vehicle? a. EV b. EVJ c. EVJT d. SJO | SJO 625.17(B) |
When cables operating at 600 volts or less are installed in the same tray with cable operating at over 600 volts, a(n) ? must be installed to separate the cables, unless the cables operating at over 600 volts are Type MC. | solid fixed The correct answer is: solid fixed barrier of a material compatible with the cable traybarrier of a material compatible with the cable tray |
The total difference between the minimum winter and maximum summer temperatures a cable tray system may be subject to must be considered to account for thermal expansion and contraction. TF | True |
lesson 4 | |
Identify the NEC sections where uses permitted and uses not permitted are addressed. | 392.10 and 392.12 |
? specifies the requirements for fiberglass cable trays and associated fittings designed for use in accordance with the requirements of the NEC. | NEMA FG 1 |
Pre-galvanizing is the most widely used coating for steel cable tray. TF | False |
Deflection of nonmetallic cable tray can be adversely affected by ? . | elevated temperatures |
What is meant by a NEMA 12A load/span class designation? | 12' span at 50 lb/ft |
When cables operating at 600 volts or less are installed in the same tray with cable operating at over 600 volts, a(n) ? must be installed to separate the cables, unless the cables operating at over 600 volts are Type MC. | solid fixed barrier of a material compatible with the cable tray |
Identify the document that provides detailed information for drilling holes for the installation of splice plates in field-cut cable tray. | NEMA VE 2 |
Identify the document that provides suggested support locations for cable tray fittings. Select one: | NEMA VE 2 |
Identify the NEC sections where uses permitted and uses not permitted are addressed. | 392.10 and 392.12 |
Lesson 5 | |
Requirements for surface metal raceways are provided in Article ? of the NEC | 386 |
How many 14 AWG THWN conductors are permitted in a Type V500 surface metallic raceway? | 7 Note: 386.21 states that the number of conductors shall not be more than what the raceway was designed for. A portion of the installation instructions is reprinted in the Information Sheet for this lesson. |