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Correct and actual answers.
Master Electrician Exam Review 150
Correct and actual answers.
Branch circuit - ANSWER-That portion of a wiring system extending beyond the final overcurrent device is called the: Calculated load - ANSWER-The final sum of the computed loads, based on the minimum code requirements, is the Resistance - ANSWER-As compared to #10, a #8 wire of the same Iength has less: 0.001 inch - ANSWER-One circular mil is the area of a circle whose diameter is: 1,000,000 cm - ANSWER-A round bus-bar one inch in diameter, has a circular mil area of: four times as great - ANSWER-A copper wire with twice the diameter of another wire has a current carrying capacity: 10.4 - ANSWER-The specific resistance of copper wire @ 20° C in ohms per circular mil ft. is permit current to flow - ANSWER-Conductance of an electric circuit is that property that will: 1O ohms - ANSWER-The equivalent value of 0.1 mho is directly proportional to its length - ANSWER-The resistance of copper wire is: Feeder - ANSWER-The portion of a wiring system between a point of distribution and the branch circuit overcurrent device is locking - ANSWER-GFCI protection at a carnival is not required for equipment at circuit if the receptacle is of the ____________type not less than 1 1/4 in. from - ANSWER-Where cables or nonmetallic raceways are installed through bored.holes in joists, rafters, or wood members;holes shall be bored so that the edge of the hole is the nearest edge - of the wood member. located on a balcony accessible only to qualified persons located in a room only accessible to qualified persons
Correct and actual answers.
elevated 8 ft or more above floor or other working surface - ANSWER-To guard live parts over 50V but less than 600V, equipment is permitted to be 12Ft - ANSWER-Overhead feeder conductors shall have a minimum __________ vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300 volts-to-ground. 36 inches - ANSWER-Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working space of horizontally shall be provided. 50' - ANSWER-What is the maximum run length of a 18AWG fixture wire that is tapped on to a 20 amp branch circuit? power supply failure - ANSWER-When the service disconnecting means is a power- operated switch or circuit breaker, it shall be able to be opened by hand in the event of a 2 in of concrete - ANSWER-Conductors are considered outside a buildings when they are buried under not less than 8 - ANSWER-In straight pull, the length of the box shall not be less than. ____times the trade size of the largest raceway. 18" - ANSWER-At least one receptacle outlet shall be installed within of the top of a show window for each 12 linear feet measured horizontally across its length 1000A - ANSWER-Ground-fault protection of equipment shall be provided fro solidly grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-to..phase for each service disconnecting means rated 18" - ANSWER-Receptacle outlets in floors shall not be counted as part of the required number of receptacle outlets unless located within ______ of the wall 50V - ANSWER-Exposed live parts of motors and controllers operating at or more between terminals shall be guarded against accidental contact by enclosure or by location 5' - ANSWER-Lighting track shall not be installed less than______ above the finished floor except' where protected from physical damage or where the track operates at less than 30 V rms, open-circuit voltage
Correct and actual answers.
35KV - ANSWER-Dry type transformers installed indoors rated over._______ shall be installed in a vault. 1 1/2" - ANSWER-Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a minimum 1 inch spacing between raceways, shall be covered with concrete to a depth of not iess than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to a depth of 48 times - ANSWER-For straight pulls, the length of a pull box shall not be less than _____ time the outside diameter, over the sheath, of the largest shielded ·or lead covered conductor or cable entering the box on systems over 600 volts 36" - ANSWER-For switchboards that are not totally enclosed, a space of ____ or more shall be provided between toe top of the switchboard and any combustible ceiling 115% - ANSWER-A disconnecting means that serves a hermetic refrigerant motor compressor shall have an ampere rating of at least percent of the nameplate rated load current or branch circuit selection current, whichever is greater. CL2 and CL3 - ANSWER-Class 2 and class 3 cables listed as suitable for general purpose use with the exception of risers, ducts, plenums, and other spaces used for environmental air, shall be Type ______ 3 inches - ANSWER-Branch circuit conductors within _____of a ballast shall have an insulation temperature rating not lower than 90 degree Cor 194 degree F 12 AWG - ANSWER-Communications circuits shall have a minimum grounding conductor of _____AWG 6 feet - ANSWER-A separation of at least ______shall be maintained between communications wires and cables on buildings and lightning conductors, where practicable Not Allowed in NYC - ANSWER-When mounting a light fixture supported be EMT over a hot tub protected by GFCI must have a height of 12 - ANSWER-How many # 10 conductors can be legally installed in a 4 inch square box, 2 1/8 deep? 6 - ANSWER-When installing receptacle around the pool they should be set back from the inside walls of not less than ______feet shall not be opened under load
Correct and actual answers.
can be used only as isolating switch - ANSWER-Knife switches rated for more 1200 amps at 250v or Less ______ 6' - ANSWER-outlets may be installed in a dwelling unit for specific appliance such as laundry equipment What is the maximum distance allowed between this outlet and the appliance? white or gray - ANSWER-When leads are supplied with lamp holders the conductor attached to the screw shell shall have a _______finish. 25' - ANSWER-A 125-volt, single-phase, 15- or 20- ampere-rated receptacle outlet shall be installed at an accessible location for the servicing of heating, air conditioning, and refrigeration equipment The receptacle shall be located on the same level and within ______of the heating, air-conditioning, and refrigeration equipment The receptacle outlet shall not be connected to the load side of the equipment disconnecting means 12 feet - ANSWER-The verticaI clearance from ground level over a residential driveway for overhead service conductors not subject to truck traffic and are less than 300 volts to ground shall be _____ ft: 20A - ANSWER-Two or more ______small-appliance branch circuits shall be provided to supply power for receptacle outlets in the dwelling unit kitchen, dining_ room, breakfast room, pantry, or similar dining areas 6 AWG - ANSWER-An insulated grounded conductor of_______or smaller shall be identified by a continuous white or gray outer finish; or by three continuous white stripes on other than green insulation along its entire length four - ANSWER-A load demand factor of 75 percent is permitted for _____or more appliances fastened in place such as waste disposals, dishwashers, trash compactors, water heaters, etc, Four - ANSWER-A hospital is a building or portion there of used for the medical, psychiatric, obstetrical, or surgical care, on a 24-hour basis, of _____ or more patients Accessible non current-cariying metal parts are required to be connected to an equipment grounding·conductor. - ANSWER-Which of the following statements best describes the grounding requirements for central vacuum outlet assemblies? USE - ANSWER-Type______ is a multi conductor cable identified for use as underground service-entrance cable
Correct and actual answers.
5 times - ANSWER-Bending radius in type AC cable should be at least _____ the diameter of the AC Cable 8 AWG - ANSWER-What is the minimum size of an overhead service drop 8" - ANSWER-What is the minimum thickness of a transformer vault floor made up with bricks or cement filled blocks 30" - ANSWER-What is the min Horizontal Climbing Space on a power conductors below communication conductors 125% - ANSWER-Branch circuit conductor that supply a single motor used in a continuous duty application shall have an ampacity of not less than Percent of the motors full-load current 5/7 - ANSWER-Where service equipment totaling 1000 KVA, or larger is installed separately, or as part of a switchboard, the room in which such switchboard is located shall be constructed of noncombustible materials having a two hour fire rating and shall be of dimensions adequate to house the switchboard and to provide the following minimum clearances: At least _____Feet in front of the switchboard if if is in one line, and at least_______ Feet in front of the board if boards are installed facing each other Over 100 Lbs - ANSWER-What is the weight in lbs, of a manhole cover that is use to keep out unqualified persons from accessible to opening the manhole? One - ANSWER-How many receptacles are required within the perimeter of a balcony, deck or porch with a useable area of less than 20 SQ. feet 26" - ANSWER-Access openings in a manholes shall be not less than: 700 - ANSWER-A service switchboard sized over 5000 amps with a 100% rating shall have copper bus bars sized on an ampacity of _____per square inch 1200 Amperes - ANSWER-19. When an equipment room houses electrical equipment rated at LEAST _____or more, the personnel doors intended for entrance to and egress from the working space, shall open in the direction of egress. protective barrier or a fixed ladder shall be provided - ANSWER-Manhole openings for personnel shall be located where they are not directly above electrical equipment or conductors inthe enclosure. Where this is not practicable 3 - ANSWER-The maximum total voltage drop on branch-circuit conductors is _______Percent
Correct and actual answers.
6 inch - ANSWER-The floors of vaults in contact with the earth shall be of concrete that is not less than ____ Thick, but where the vault is constructed with a vacant space or other stories below it, the floor shall have adequate structural strength for the load imposed on it and a minimum fire resistance of 3 hours. Shall be Permitted - ANSWER-When the Code uses the words " " it means the identified actions are allowed but not required, and they may be options or alternative methods. Shall or Shall Not - ANSWER-In the NEC, the words "_______ " indicate a mandatory requirement 4 Feet - ANSWER-The dimensions of working space for access to live parts operating at 3OOV, nominal to ground, where there are exposed live parts on both sides of the work space is 3.5 Feet - ANSWER-The required working space for access to live parts operating at 300 volts to ground, where there are exposed live parts on one side and grounded parts on the other side is. white with colored stripe other than green or distinguished by other suitable approved means - ANSWER-Where conductors of different systems are installed in the same raceway, one system shall have a neutral having an outer covering of white or natural gray and each other system having a neutral shall have another covering of Orange - ANSWER-On a 4-Wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or bus bar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is in ______ color or by other effective means. Such identification shall be placed at each point on the system where ·a connection is made if the grounded conductor is also present. 50' - ANSWER-Where this code specifies that one equipment shall be "in sight from", "within sight from" or ''within sight of', and so forth, another equipment, the specified equipment is to be visible and not more than ______ distant from the other 36" - ANSWER-Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working Space of _______horizontally shall be provided
Correct and actual answers.
13 - ANSWER-How many receptacle outlets are permitted .on a 20A. 120V ircuit in a commercial building? 200 VA - ANSWER-For show-window lighting, a load of not less 660 Volt- amperes/linear meter or _____ volt amperes/linear foot shall be included for show window measured horizontally along its base 10 feet above grade level - ANSWER-Open conductors which are not service entrance cables shall not be installed less than which of the following Supported - ANSWER-Open conductors shall be ______ on glass or porcelain knobs, racks, brackets, or stain insulators 4" - ANSWER-Open conductors installed outside shall be separated from open conductors of other circuits or systems by not less than. 3' - ANSWER-Service conductors installed as unjacketed multiconductor cable shall have a minimum clearance of ______ from window s that are designed to be opened, doors, porches, stairs, fire escapes, or similar locations. 24" - ANSWER-Where it is impracticable to locate the service head above the point of attachment, the service head location shall be permitted not farther than______from the point of attachment power supply failure - ANSWER-When the service disconnecting means is a power- operated switch or circuit breaker, it shall be able to be opened by hand in the event of a. Can be connected to line side of service disconnect. - ANSWER-What is true about installation of a Type 1 TVSS 5000 VA - ANSWER-Minimum VA for a Dryers 1000A - ANSWER-Ground fault protection of equipment shall be provided for solidly grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-to-phase for each service disconnecting means rated __________ #4 cooper & #2 Aluminum - ANSWER-What is the minimum size Service Conductor allowed for a dwelling unit 4% - ANSWER-The maximum voltage drop from Service point to the last overcurrent device in a dwelling unit?
Correct and actual answers.
for the practical safeguarding of persons and property - ANSWER-The NEC is ______ an electrical system essentially free from hazard - ANSWER-Compliance with the provisions of the NEC will result in a. efficient use ,convenience, good service or future expansion·of electrical use - ANSWER-The Code contains provisions considered necessary for safety, which will not necessarily result in overloading of wiring systems by methods or usage not in conformity with the NEC, initial wiring not providing for increases in the use of electricity - ANSWER-Hazards often occur because of True - ANSWER-The Code isn't a design specification standard or instruction manual for the untrained and unqualified signaling, electrical conductors, equipment, and raceways, communications - ANSWER- The following systems shall be installed in accordance with the NEC requirements: electrical conductors and equipment, optical fiber cables within or on public and private buildings, outside conductors and equipment on the premises - ANSWER-The NEC applies to the installation of True - ANSWER-The NEC does not cover electrical installations in ships, watercraft, railway rolling stock, aircraft, or automotive vehicles. Accessible (as applied to equipment) - ANSWER-Admitting close approach, not guarded by locked doors, elevation, or other effective means, is referred to as accessible, readily. - ANSWER-Capable of being reached quickly for operation, renewal, or inspections without resorting to portable ladders and such is known as accessible (as applied to wiring methods) - ANSWER-Capable of being removed or exposed without damaging the building structure or finish, or not permanently· closed in by the structure or finish of the building is known as Ampacity - ANSWER-The current in amperes a conductor Ca.n carry continuously, where the temperature will not be raised in excess of the conductor's insulation temperature rating is called its_· approved - ANSWER-Acceptable to the authority having jurisdiction means
Correct and actual answers.
Cutout boxes - ANSWER-_______ are designed for surface mounting with a swinging door demand factor - ANSWER-The ________of any system is the ratio of the maximum demand of a system, or part of a system, to the total connected load of a system. device - ANSWER-A unit of an electrical system that carries or con1trols electric energy as its principal function is a(n) disconnecting means - ANSWER-A(n) _______is a device by which the conductors of a circuit can be disconnected from their source of supply dwelling unit - ANSWER-A_______is a single unit that provides independent living facilities for persons, including permanent provisions for living, sleeping, cooking, and sanitation.
