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Philippine electrical code REVIEW, Exercises of Mathematics

Abilene Christian University (ACU)Mathematics

this file composed of electrical codes that need for a student,teachers whose learning and taking a bachelor of science in electrical engineering

Typology: Exercises

2020/2021

Uploaded on 05/27/2021

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Republic of the Philippines
PROFESSIONAL REGULATION COMMISSION
Manila
BOARD OF ELECTRICAL ENGINEERING
REGISTERED MASTER ELECTRICIAN Licensure Examination
---------------------------------------------------------------------------------------------------------------------
PHILIPPINE ELECTRICAL CODE
INSTRUCTION: Select the correct answer for each of the following questions. Mark only
one answer for each item by shading the box corresponding on the letter
of your choice on the answer sheet provided. STRICTLY, NO
ERASURES ALLOWED. Use pencil No. 1 only.
MULTIPLE CHOICES
1. A reliable conductor used to ensure the required conductivity between metal
parts which are to be electrically connected is called which of the following:
a. Connector b. Bonding jumper
c. Insulated conductor d. Branch connector
2. The current measured in amperes which a conductor can carry continuously
under standard conditions without exceeding the conductor's maximum
temperature rating is called:
a. Maximum current b. Conductor current
c. Ampacity d. Convection amps
3. Limiting the total quantity of circuits in any given enclosure does which of the
following:
a. Minimizes the effects of a short circuit in one circuit
b. Eliminates over-expansion in the future
c. Provides easy access to qualified workers
d. Provides a standard for the Authority Having Jurisdiction
4. Items in the Code that identify actions that are specifically required or prohibited
are considered which of the following:
a. Permissive rules
b. Mandatory rules
c. Guidelines for examination of installation
d. Permitted use
5. Two or more ungrounded conductors with equal voltage running between them
and a grounded conductor is considered which of the following:
a. Control circuit b. Feeder
c. Branch circuit d. Loop feed
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Download Philippine electrical code REVIEW and more Exercises Mathematics in PDF only on Docsity!

Republic of the Philippines PROFESSIONAL REGULATION COMMISSION Manila

BOARD OF ELECTRICAL ENGINEERING

REGISTERED MASTER ELECTRICIAN Licensure Examination

PHILIPPINE ELECTRICAL CODE

INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by shading the box corresponding on the letter of your choice on the answer sheet provided. STRICTLY, NO ERASURES ALLOWED. Use pencil No. 1 only.

MULTIPLE CHOICES

  1. A reliable conductor used to ensure the required conductivity between metal parts which are to be electrically connected is called which of the following: a. Connector b. Bonding jumper c. Insulated conductor d. Branch connector
  2. The current measured in amperes which a conductor can carry continuously under standard conditions without exceeding the conductor's maximum temperature rating is called: a. Maximum current b. Conductor current c. Ampacity d. Convection amps
  3. Limiting the total quantity of circuits in any given enclosure does which of the following: a. Minimizes the effects of a short circuit in one circuit b. Eliminates over-expansion in the future c. Provides easy access to qualified workers d. Provides a standard for the Authority Having Jurisdiction
  4. Items in the Code that identify actions that are specifically required or prohibited are considered which of the following: a. Permissive rules b. Mandatory rules c. Guidelines for examination of installation d. Permitted use
  5. Two or more ungrounded conductors with equal voltage running between them and a grounded conductor is considered which of the following: a. Control circuit b. Feeder c. Branch circuit d. Loop feed
  1. A device that de-energizes a circuit or a portion of a circuit within an established time frame when a current to ground exceeds the values determined for a Class A device is which of the following: a. Circuit breaker b. Fuse c. Ground-fault interrupter d. Voltage regulator switch
  2. A device that protects a motor against overheating and is an integral part of that motor is considered which of the following: a. Integral fuse b. Ground-fault protector c. Thermal protector d. Shunt trip switch
  3. An assembly of two or more single-pole fuses is which of the following: a. Multiple fuse b. Multi-tap connector c. Switching device d. Panel-board
  4. A continuous load is one in which one of the following types of current is expected to run non-stop for three hours or more: a. Continuous b. Normal c. Maximum d. Limited
  5. A branch circuit where two or more ungrounded conductors, with a potential difference between them, and a grounded conductor with equal potential difference between it and each ungrounded conductor is referred to as which of the following: a. Continuous loop feed system b. Multi-wire c. General purpose circuit d. Regulated branch circuit
  6. The purpose of the Philippine Electrical Code is to provide which of the following: a. A standard by which professionals may design installations b. Efficient electrical installations c. Cost-effective installations d. Safe electrical installations
  7. Circuit voltage is best defined as which of the following: a. Average potential between two conductors b. Maximum potential difference between two conductors c. Effective difference of potential between two conductors d. Total amperes produced between two conductors
  8. The connection device installed at an outlet to allow for two or more contact devices at the same yoke is which of the following: a. Duplex outlet b. Multiple receptacle c. Slice connector d. None of the above
  9. A large single panel assembly of panels containing mounted switches, overcurrent and protection devices and buses is considered which of the following: a. Panelboard b. Switchboard c. Automatic transfer switch d. Service panel
  10. A switching device utilized to isolate a circuit or equipment from an established power source is determined to be which of the following:
  1. High-voltage conductor tunnel installations require metal conduit or metal raceways and which of the following: a. Type MC cable b. Aluminum conductors c. Copper-clad aluminum conductors d. EMT cable
  2. Unused raceway or cable openings in boxes and conduits must be closed so that the protection provided is which of the following: a. At least equal to the protection provided by the wall of the box or conduit b. Equal to the depth of the wall framing c. Greater than the protection provided by the box or conduit alone d. Adequate to act as a fire stop
  3. The fire rating for walls, floors and doors containing equipment over 600 volts nominal shall be a minimum of which of the following: a. 1 hour b. 2 hours c. 3 hours d. 6 hours
  4. Often, equipment and terminations are labeled with which of the following: a. The initials of the installer b. Service tag c. Tightening torque d. Wiring designations
  5. Ventilation system electrical controls shall be installed in manner in which the airflow can be managed in which of the following ways: a. Vented to the outside b. Reversed c. Limited upon demand d. Prevented
  6. In order to be electrically secure prior to soldering, splices must be which of the following: a. Sanded b. Joined mechanically c. Free of rough edges d. Coated with flux
  7. Unless otherwise specified, live parts for electrical equipment operating at ____ volts or more shall be guarded. a. 50 b. 100 c. 150 d. 200
  8. Voltage to ground of 150-600 with exposed live parts on both sides of the working space must have a clear distance not less than which of the following: a. 2 900 mm b. 2500 mm c. 2000 mm d. 2800 mm
  9. Concrete and brick walls are considered which of the following: a. Dry locations b. Insulators c. Wet locations d. Grounded
  10. If a conductor material is not specified in a particular Article or Section, the material shall be assumed to be which of the following: a. Copper b. Aluminum c. Copper-clad aluminum d. No assumptions shall be made
  11. A high-let conductor in a three-phase, 4-wire delta secondary shall be which of the following colors:

a. White b. Orange c. Green d. Black

  1. Conductor sizes are listed in which of the following: a. Circular mils b. Diameter or thickness c. AWG or millimeters d. AWG or circular mils
  2. A single-family dwelling has three bathrooms each with the following: a lighting fixture, a fan, and one receptacle outlet. In one of the bathrooms, the lighting fixture, fan, and receptacle outlet are installed on a dedicated 20 ampere circuit. For this dwelling, the minimum number of 20 ampere circuits required to serve the bathrooms is which of the following: a. Two b. Three c. Four d. Five
  3. One building is supplied power from another building on a non-industrial property with a single owner. The underground feeder is protected by a 100 ampere circuit breaker in the first building. Qualified persons are not always available to service the installation; therefore, the disconnecting means for the second building must be which of the following: a. Located inside the second building, and is not required to be located near the point where the conductors enter the building b. At the closest practical point where the conductors enter the building, and may be located either inside or outside of the building c. The circuit breaker in the first building d. Located on the outside of the building, near the point where the conductors enter the building
  4. In a single-phase, 3-wire electrical system, the middle conductor must be which of the following: a. Hot b. Grounded c. Ungrounded d. Out-of-phase
  5. In a 3-wire, single phase electrical system, the nominal voltage must be 120 volts between the ungrounded conductor and the neutral, and the volts between the two ungrounded conductors must be which of the following: a. 120 volts b. 240 volts c. 288 volts d. 600 volts
  6. In a single-phase, 3-wire electrical system, the hot conductors are referred to as which of the following: a. Neutral conductors b. Grounded conductors c. Nominal conductors d. Ungrounded conductors
  7. The current flowing through the neutral of a 120/240 volt 3-wire, single-phase electrical system is calculated as which of the following? a. The difference between the current of the two ungrounded conductors b. The sum of the current flowing on the two ungrounded conductors c. The current of the first ungrounded conductor divided by the current of the second ungrounded conductor d. 240 volts divided by 120 volts
  8. The exposed non-current carrying metal parts of a hand-held cord-and-plug drill must be grounded in which of the following scenarios:

Republic of the Philippines PROFESSIONAL REGULATION COMMISSION Manila

BOARD OF ELECTRICAL ENGINEERING

REGISTERED MASTER ELECTRICIAN Licensure Examination

PHILIPPINE ELECTRICAL CODE

INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by shading the box corresponding on the letter of your choice on the answer sheet provided. STRICTLY, NO ERASURES ALLOWED. Use pencil No. 1 only.

MULTIPLE CHOICES

  1. A standard rating for an overcurrent device is which of the following: a. 50 amperes b. 110 amperes c. 275 amperes d. 1500 amperes
  2. A main bonding jumper is which of the following: a. The connection between the grounding conductor and an equipment grounding conductor at a separately derived system b. The connection between a grounding conductor and equipment operating at 600 volts nominal or less c. The connection between the grounded circuit conductor and the equipment grounding conductor at the service d. The connection between the main electrical service and a grounding conductor
  3. The electrical continuity at service equipment and service conductors must be ensured by using which of the following installation techniques: a. Threaded couplings or threaded bosses on enclosures are made wrenchtight b. Bushings with bonding jumpers are used c. Either of the above d. Both of the above
  4. Lightning protection system ground terminals must be bonded to which of the following: a. The building or structure b. The building or structure grounding electrode systems c. To a common grounding electrode conductor d. A surge arrestor
  5. Enclosures around electrical equipment enclosures shall be considered accessible if they are controlled by which of the following: a. Locks with keys b. Combination locks

c. Keypad locks to which a qualified person has the code in order to unlock the enclosure. d. Any of the above

  1. A system bonding jumper is which of the following: a. The connection between the grounded circuit conductor and the equipment grounding conductor at a separately derived system b. A wiring system that connects two or more separately derived systems c. The connection between the grounded circuit conductor and the equipment grounding conductor at the service d. A wiring system that connects a grounded circuit conductor to equipment
  2. Type AC cables are allowed for which of the following uses: a. In exposed work b. In concealed work c. Both A & B d. None of the above
  3. Size2.0 sq mm copper conductor, type THHN cable is permitted in which of the following applications: a. Wet locations b. Dry locations c. Both of the above d. None of the above
  4. For a two-family dwelling unit located at grade level, how many outlets are required, assuming installation is no more than 2,000 mm above grade level: a. One outlet at each exterior door b. One outlet at the front of the dwelling unit c. A total of two outlets d. One outlet at the front and one at the back of the unit
  5. A branch circuit that consists of at least two ungrounded conductors with a potential difference between them and an identified grounded conductor which has equal potential between it and each of the ungrounded conductors is considered which of the following: a. A split branch circuit b. A multi-wire branch circuit c. A grounded branch circuit d. None of the above
  6. A single open conductor which does not serve as a service entrance cable must be installed at which of the following depths: a. Not less than 3,100 mm from grade level b. A minimum of 2,000 mm from grade level c. Not more than 3,100 mm from grade level d. Not less than 2,000 mm from grade level unless encased in concrete
  7. If open conductors are exposed to physical damage, they must be installed in which of the following: a. Rigid metal conduit b. Rigid nonmetallic conduit c. Intermediate metal conduit d. Any of the above
  8. Concealed knob-and-tube wiring is not permitted in which of the following applications: a. Commercial garages b. Motion picture studios c. Hazardous classified locations d. All of the above

b. “Suitable for use in wet locations” c. Conductor temperature ratings d. All of the above

  1. Intermediate metal conduit shall be permitted in which of the following installations: a. Any type of occupancy b. Corrosive environments c. Wet locations d. All of the above
  2. IMC shall be permitted for use as which of the following: a. An equipment grounding conductor b. An unsupported vertical riser from fixed equipment c. Both of the above d. None of the above
  3. Underground feeder cable shall be prohibited for which of the following installations: a. In hoistways b. In theaters c. In commercial garages d. All of the above
  4. Underground feeder cable shall be permitted for which of the following applications: a. In hoistways b. In theaters c. In commercial garages d. All of the above
  5. A nonmetallic extension shall consist of which of the following installation requirements: a. A continuous, unbroken length of assembly must be used b. The assembly shall not contain splices c. The extension assembly can not have exposed conductors between fittings d. All of the above
  6. Unless otherwise prohibited, type NMC cable is permitted for which of the following applications: a. In outside masonry block walls b. In exposed work c. In moist, damp or corrosive locations d. All of the above
  7. Type NMS cable is permitted for which of the following applications: a. Corrosive locations exposed to fumes or vapors b. Embedded in masonry c. Exposed work in normally dry locations d. All of the above
  8. Type MI cable shall not be used for which of the following applications: a. Where embedded in plaster or concrete b. As service cabling c. Attached to cable trays

d. None of the above

  1. Type FCC cabling shall be approved for which of the following uses: a. Appliance branch circuits b. General purpose branch circuits that do not exceed 30 amperes c. Individual branch circuits that do not exceed 20 amperes d. All of the above
  2. Which of the following statements is true for FCC cable systems: a. Unused cable runs and associated cable connectors may be left in place and energized. b. New cable connectors must be used to make alterations at new connection points. c. All of the above d. None of the above
  3. FC cable assemblies are permitted to be used in which of the following applications: a. As branch circuits to supply tap devices for small appliances not to exceed 30 amps b. In wet locations c. In damp locations d. All of the above
  4. Armored cable is permitted for use in which of the following installations: a. Dry, damp, and wet locations b. Embedded in plaster finish on brick in dry locations c. Both of the above d. None of the above
  5. Nonmetallic boxes shall only be used for which of the following installations: a. Concealed knob-and-tube wiring systems b. Single-dwelling or two-family wiring systems c. Both of the above d. None of the above
  6. Conductors run in parallel in each phase, polarity, neutral, or grounded circuit conductor must comply with which of the following: a. Be terminated in the same manner and have the same insulation type b. Have the same size circular mil area c. Be of the same length and conductor material d. All of the above
  7. In a situation where more than one calculated ampacity could apply to a circuit length, which of the following values shall be used: a. The lowest b. 25% of the combined ampacity c. An average of the combined ampacities d. None of the above
  8. Raceways that are exposed to a variety of temperatures shall be which of the following:

c. Two d. Three

  1. When installed in raceways, conductors which are #8 AWG or larger shall meet which of the following requirements: a. Not be insulated b. Be stranded c. Both of the Above d. Either of the above
  2. When a conductor is installed in conduit exposed to direct sunlight and in close proximity to a rooftop, under certain circumstances it can experience which of the following: a. A temperature rise of 30 degrees F above the ambient temperature on which the conductor ampacity is based b. 10 degrees C above the conductor temperature rating c. A swelling in the conductor insulation d. Cable stretch
  3. For fixed electric space heating equipment consisting of resistance elements with a motor, the branch circuit conductor ampacity and the overcurrent rating of the protective device that supplies the equipment shall not be less than which of the following: a. 100% of the total heating equipment load b. 125% of the total motor load c. 125% of the total load of the motor and the heaters d. The combined ampacity of all of the equipment
  4. The disconnection means for fixed appliances within a ten-unit apartment building must be in which of the following locations: a. Inside each individual dwelling unit b. In the main mechanical room of the building c. In an accessible common location within the building d. Within each individual unit or on the same floor in the building

Republic of the Philippines PROFESSIONAL REGULATION COMMISSION Manila

BOARD OF ELECTRICAL ENGINEERING

REGISTERED MASTER ELECTRICIAN Licensure Examination

PHILIPPINE ELECTRICAL CODE

INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by shading the box corresponding on the letter of your choice on the answer sheet provided. STRICTLY, NO ERASURES ALLOWED. Use pencil No. 1 only.

MULTIPLE CHOICES

  1. If an individual 30 amp branch circuit feeds a single non-motorized equipment receptacle, then the receptacle amperage must be which of the following: a. 20 b. 30 c. 40 d. None of the above
  2. Conductors run in parallel raceways must have equipment grounding conductors which are which of the following: a. Run in individual raceways b. Supported every 6 inches c. Run in parallel in each raceway d. Protected from excessive temperature
  3. A surge arrester of less than 1000 volts nominal shall have a ground connecting conductor which is no smaller than which of the following sizes: a. 8.0 sq mm b. 5.5 sq mm c. 3.5 sq mm d. 2.0 sq mm
  4. When there is more than one nominal voltage system in the building, ungrounded feeder conductors must be which of the following: a. Connected through a transfer switch b. Separately identified c. Run in individual conduits d. Identified using the same color
  5. Single-point grounding is allowed at the source of a separately derived system when which of the following conditions exists: a. A separate equipment grounding conductor is provided at each building and enclosure b. The neutral is insulated and isolated from earth, except at one location c. An equipment grounding conductor is run with the phase conductors d. All of the above
  6. The permitted identification of a size 14.0 sq mm or smaller insulated grounded conductor is which of the following:

c. On circuits in excess of 600 volts d. All of the above

  1. A 125 volt single-phase kitchen counter receptacle must meet which of the following requirements: a. Have ground-fault interruption protection b. Be a maximum of 20 amps c. Be a minimum of 15 amps d. All of the above
  2. A surge arrestor may be installed under which of the following conditions: a. On an impedance grounded system b. On a service less than 1000 volts with a grounding electrode for the service c. Either of the above d. None of the above
  3. An impedance grounded neutral system is permitted to be installed if which of the following conditions is met: a. If installed to serve a line-to-neutral b. If installed outside in an easily accessible location c. Ground detectors are installed on the system d. None of the above
  4. Multi-wire branch circuits are permitted to supply which of the following: a. Only line-to-line neutral loads b. Only one piece of utilization equipment c. Both of the above d. None of the above
  5. The minimum size of an equipment grounding conductor used to ground equipment with an automatic overcurrent device rated at 40 amps in the circuit ahead of the piece of equipment is which of the following: a. 8.0 sq mm copper b. 8.0 sq mm aluminum c. 5.5 sq mm aluminum d. 5.5 sq mm copper
  6. The size of the sole connection of a grounding electrode conductor connected to a concrete-encased electrode shall not be required to be which of the following: a. Larger than 2.0 sq mm copper b. Connected to an electrode encased by at least 50 mm of concrete c. Both of the above d. None of the above
  7. For a 30 amp receptacle connected to a 30 amp branch circuit supplying two or more outlets, the total cord-and-plug load may not exceed which of the following sizes: a. 24 amps b. 16 amps c. 15 amps d. 12 amps
  8. An equipment grounding conductor that is run with circuit conductors is permitted to be which of the following: a. A solid copper busbar

b. Any flexible metal conduit c. Any liquid tight conduit d. All of the above

  1. Circuits over 120 volts but not exceeding 277 volts between conductors shall be permitted to supply power to which of the following: a. The auxiliary equipment of electric-discharge lamps mounted in permanently installed fixtures b. Luminaries equipped with mogul-base screw shell lamp holders c. Screw shell type lamp holders d. None of the above
  2. The minimum size copper circuit wire for a 20 amp branch circuit conductor is which of the following: a. 8.0 sq mm copper b. 5.5 sq mm copper c. 3.5 sq mm copper d. 2.0 sq mm copper
  3. Restricted-access, adjustable-trip circuit breakers must meet which of the following requirements: a. Have a removable and sealable cover over the adjusting means b. Be located behind bolted equipment covers c. Be accessible only to a qualified person by means of a locked door d. All of the above
  4. The laundry area in a single-family dwelling unit must have which of the following: a. A minimum of one 20 amp and one 220 amp receptacle b. At least one receptacle c. At least one receptacle installed within 3 feet of the washing machine location d. A minimum of two GFCI receptacles
  5. If a feeder conductor carries the total load supplied by the service conductors with an ampacity of 50 amps, then which of the following standards must be met: a. The feeder ampacity must be greater than the service conductor ampacity b. The feeder ampacity must be less than the service conductor ampacity c. The feeder ampacity must be 30 amps d. None of the above
  6. Where more than one building exists on the same property under single management, additional feeders or branch circuits are permitted to supply which of the following: a. Optional standby systems b. Fire pumps c. Parallel power production systems d. All of the above
  7. The use of 5-wire feeders is which of the following: a. Prohibited b. Restricted to installations over 600 volts nominal c. Requires that the overcurrent device protection be 100% of the continuous load
  1. A single-point grounded neutral system may include which of the following: a. A grounding electrode b. A bonding jumper that connects the equipment grounding conductor to a grounding electrode conductor c. A grounding electrode conductor that connects the grounding electrode to the system neutral d. All of the above
  2. Service equipment electrical continuity shall be ensured by which of the following: a. Bonding equipment to the neutral conductor b. Use of bonding type bushings c. Both of the above d. Either of the above
  3. If the use of multiple grounding connections results in objectionable current, which of the following alterations is permitted: a. Change the location of the grounding connections b. Discontinue one or more, but not all, of the grounding connections c. Either of the above d. Both of the above
  4. A feeder overcurrent device that is not readily available shall be installed in which of the following manners: a. Branch circuit overcurrent devices must be installed on the load side b. Branch circuit overcurrent devices shall have a lower ampacity rating than the feeder overcurrent device c. Branch circuit overcurrent devices must be installed in a readily accessible location d. All of the above
  5. Open conductors that are not service entrance cables shall not be installed less than which of the following: a. 3,100 mm from grade level b. 2,900 mm below grade level c. 2, 500 mm below grade level d. 1, 300 mm from grade level
  6. Ground-loop currents flow if the neutral-to-ground connections are made in which of the following ways: a. On the feed side of separately derived systems b. On the load side of service equipment or separately derived systems c. In front of the overcurrent protection device d. All of the above
  7. The metal disconnecting means at a remote building, supplied by a feeder with an equipment grounding conductor, is required to be which of the following: a. Connected on the service load side of the feeder b. Buried not less than 3 feet under the ground c. Grounded to a grounding electrode d. None of the above
  1. Circuit conductors that supply power conversion equipment included as part of an adjustable-speed drive system must have an ampacity of which of the following: a. At least 125 percent of the motor’s full-load current b. Not less than 125 percent of the rated input to the power conversion equipment c. Not less than 50 percent of the maximum ampacity listed on the equipment nameplate d. All of the above
  2. The disconnection means for a 400 volt motor circuit must have an ampere rating of which of the following: a. At least 125 percent of the motor’s full-load current b. Not less than 115 percent of the full-load current rating of the motor c. 120 amps d. Equal to or greater than that the ampacity listed on the motor equipment
  3. A 15 amp receptacle that is installed in a wet location must meet which of the following installation requirements: a. Be protected from rain or water runoff b. Have an attachment plug cap inserted c. Have an enclosure that is weatherproof d. All of the above
  4. Receptacles are considered grounded by which of the following methods: a. When the grounding contacts are connected to the equipment grounding conductor of the circuit that supplies the receptacle b. If the receptacle ground wire is terminated under a metal screw c. When wired to a cord connector d. When the grounding contacts have been effectively grounded
  5. Installations for the electrical heating of a pipeline must: a. Be protected from physical damage b. Include caution signs posted at frequent intervals along the pipeline c. Be identified as being suitable for the chemical, thermal and physical environment of the installation d. All of the above
  6. An industrial control panel supply conductor shall have an ampacity of which of the following: a. No less than 125% of the full-load current rating of all resistance heating loads and no more than 125% of all combined continuous loads b. No less than 125% of the full-load current rating of all resistance heating loads plus 125% of the full-load current rating of all other connected motors based on their duty cycle if they are all in operation at the same time c. No less than 125% of the full-load of two or more components of a systematic assembly d. Not to exceed the ampacity listed for all resistance heating equipment and connected motor nameplates