PEC

Question 1

The PEC does not cover the following except for

a. installations of building communication system
b. water craft other than floating buildings
c. aircraft
d. automotive vehicles

Answer 1

a. installations of building communication system

Question 2

This Code is intended to be suitable for ______ application by governmental bodies that exercise legal jurisdiction over electrical installations, including signaling and communications systems, and for use by insurance inspectors.

a. mandatory
b. advisory
c. regulatory
d. a, b and c

Answer 2

a. mandatory

Question 3

What does FPN in PEC mean

a. For Philippine Name only
b. Fine Print Notes
c. For printed notes only
d. For Philippine Notes only

Answer 3

b. Fine Print Notes

Question 4

The Code does not contain detailed information on equipment or materials but refers to the products as

a. listed
b. labeled
c. identified
d. all of these

Answer 4

d. all of these

Question 5

In PEC Wiring Planning includes

a. Future Expansion
b. Number of Circuits in Enclosures
c. Convenience
d. all of these

Answer 5

d. all of these

Question 6

For the purpose of this Code, metric units of measurement are in accordance with the modernized metric system known as the

a. International System of Units (SI)
b. CGS units
c. IEC units
d. English units

Answer 6

a. International System of Units (SI)

Question 7

Accessible, as applied to wiring methods means

a. Capable of being removed or exposed without damaging the building structure
b. finish or not permanently closed in by the structure
c. finish of the building
d. all of the above

Answer 7

d. all of the above

Question 8

By definition, Readily Accessible does not conform to

a. capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to climb over
b. remove obstacles
c. to resort to portable ladders
d. with padlocks

Answer 8

d. with padlocks

Question 9

The purpose of bonding is to establish an effective path for fault current that, in turn, facilitates

a. the operation of the overcurrent protective device
b. the operation of the overload device
c. the operation of the cable
d. the operation of the disconnect

Answer 9

a. the operation of the overcurrent protective device

Question 10

The connection between the grounded circuit conductor and the equipment grounding conductor at the service.

a. Main Bonding Jumper
b. Equipment Bonding Jumper
c. System Bonding Jumper
d. Grounding

Answer 10

a. Main Bonding Jumper

Question 11

General-Purpose Branch Circuit means

a. A branch circuit that supplies outlets for lighting
b. A branch circuit that supplies two or more receptacles or outlets for lighting and appliances.
c. A branch circuit that supplies only one utilization equipment.
d. A branch circuit that supplies only one lighting unit.

Answer 11

b. A branch circuit that supplies two or more receptacles or outlets for lighting and appliances.

Question 12

According to the Code, automatic opening of circuit breaker means can be any of the following except for

a. integral
b. direct acting with the circuit breaker
c. shunt trip
d. remote from the circuit breaker

Answer 12

c. shunt trip

Question 13

A qualifying term indicating that there is purposely introduced delay in the tripping action of the circuit breaker, which delays decrease as the magnitude of the current increases.

a. Adjustable
b. Instantaneous Trip
c. Inverse Time
d. Subtransient Trip delay

Answer 13

c. Inverse Time

Question 14

Conductors are drawn from a copper-clad aluminum rod with the copper metallurgically bonded to an aluminum core. The copper forms a minimum of 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor.

a. Copper-Clad Aluminum Conductors
b. Impregnated Copper Conductor
c. ACSR
d. AAAC

Answer 14

a. Copper-Clad Aluminum Conductors

Question 15

Which of the following operation of a motor is not correct?

a. Intermittent duty means Operation for alternate intervals of motor for load and no load; or load and rest; or load, no load, and rest.
b. Periodic Duty Intermittent operation in which the load conditions are regularly recurrent.
c. Short-Time Duty Operation at a substantially constant load for a short and definite, specified time.
d. Varying duty Operation at loads, and for intervals of time, both of which may be subject to constant variation of mechanical load.

Answer 15

d. Varying duty Operation at loads, and for intervals of time, both of which may be subject to constant variation of mechanical load.

Question 16

It is a term for proper arrangement of incandescent lamps or electric-discharge lighting to outline or call attention to certain features such as the shape of a building or the decoration of a window.

a. outline lighting
b. lighting track
c. lighting grid
d. lighting template

Answer 16

a. outline lighting

Question 17

Insulation is one of the most important parts of the electrical system that

a. Prevents the flow of electricity between points of different potential in an electrical system.
b. Prevents the flow of electricity between points of different currents in an electrical system
c. Prevents the electromagnetic induction between two electrical systems
d. Prevents the flow of arc between points of different potential in an electricals system

Answer 17

a. Prevents the flow of electricity between points of different potential in an electrical system.

Question 18

The width of the working space in front of the electric equipment shall be the width of the equipment or ______ whichever is greater. In all cases, the workspace shall permit at least a 90 degree opening of equipment doors or hinged panels.

a. 1000 mm
b. 760 mm
c. 500 mm
d. 76 mm

Answer 18

b. 760 mm

Question 19

Equipment that is associated with the electrical installation and is located above or below the electrical equipment shall be permitted to extend not more than ________ beyond the front of the electrical equipment.

a. 100 mm
b. 760 mm
c. 500 mm
d. 150 mm

Answer 19

d. 150 mm

Question 20

The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be

a. 2000 mm
b. 1500 mm
c. 5000 mm
d. 150 mm

Answer 20

a. 2000 mm

Question 21

Except as elsewhere required or permitted by this Code, live parts of electrical equipment operating at _____ volts or more shall be guarded against accidental contact by approved enclosures.

a. 50
b. 600
c. 100
d. 220

Answer 21

a. 50

Question 22

Sufficient space shall be provided and maintained about electric equipment to permit ready and safe operation and maintenance of such equipment. Where energized parts are exposed, the minimum clear workspace shall not be less than

a. 2000 mm
b. 1500 mm
c. 5000 mm
d. 150 mm

Answer 22

a. 2000 mm

Question 23

At least one entrance not less than ______mm wide and ________mm high shall be provided to give access to the working space about electric equipment.

a. 100, 2000
b. 1500, 600
c. 600, 5000
d. 600, 2000

Answer 23

d. 600, 2000

Question 24

Illumination shall be provided for all working spaces about electrical equipment. The lighting outlets shall be arranged so that

a. Persons changing lamps or making repairs on the lighting system are not endangered by live parts or other equipment.
b. Lamp can be easily repair
c. To follow lighting grid
d. For beauty

Answer 24

a. Persons changing lamps or making repairs on the lighting system are not endangered by live parts or other equipment.

Question 25

the correct formula for Elevation of Unguarded Live Parts Above Working Space over 34.5kV is a. 2800mm+10mm per kV b. 5500mm+10mm per kV c. 2000mm+10mm per kV d. 1800mm+10mm per kV

Answer 25

a. 2800mm+10mm per kV

Question 26

The following shall be used only for the grounded circuit conductor except for a. conductor with continuous white or gray covering b. conductor with three continuous white stripes on other than green insulation c. marking of white or gray color at the termination d. yellow color

Answer 26

d. yellow color

Question 27

The terminal for the connection of the equipment grounding conductor shall be identified by one of the following except for a. A green, not readily removable terminal screw with a hexagonal head. b. A green, hexagonal, not readily removable terminal nut. c. A green pressure wire connector. d. entrance hole marked with the word gray

Answer 27

d. entrance hole marked with the word gray

Question 28

The magnitude of the reflected wave increases as the distance from the arrester increases. If the length of the conductor between the protected equipment and the surge arrester is short, the magnitude of the wave reflected through the equipment is minimized due to a. wave effect b. Ferranti effect c. Petersen effect d. separation effect

Answer 28

d. separation effect

Question 29

The equipment grounding conductor of a grounding-type receptacle or a branch-circuit extension shall be permitted to be connected to any of the following: a. Any accessible point on the grounding electrode system b. Any accessible point on the grounding electrode conductor c. The equipment grounding terminal bar within the enclosure where the branch circuit for the receptacle or branch circuit originates d. The grounded service conductor outside the service equipment enclosure

Answer 29

d. The grounded service conductor outside the service equipment enclosure

Question 30

One of the functions of an equipment grounding conductor is to provide a _______ impedance ground-fault path between a ground fault and the electrical source a. low b. high c. open d. short

Answer 30

a. low

Question 31

The grounding conductor for secondary circuits of instrument transformers and for instrument cases shall not be smaller than ____ sq. mm copper or ______ sq. mm aluminum. a. 3.5, 5.5 b. 2.0, 3.5 c. 5.5, 8.0 d. 3.5, 8.0

Answer 31

a. 3.5, 5.5

Question 32

Which of the following provisions for neutral conductor is not correct? a. The minimum insulation level for neutral conductors of solidly grounded systems shall be 600 volts. b. Bare copper conductors shall be permitted to be used for the neutral of service entrances and the neutral of direct-buried portions of feeders. c. Bare conductors shall be permitted for the neutral of overhead portions installed outdoors. d. It has a disconnect.

Answer 32

d. It has a disconnect.

Question 33

Which among the following is not stated in PEC? It shall be permissible to ground meter enclosures by connection to the grounded circuit conductor on the load side of the service disconnect if a. No service ground-fault protection is installed, and b. All meter enclosures are located near the service disconnecting means, and c. The size of the grounded circuit conductor is not smaller than equipment grounding conductors. d. Bonding is not possible

Answer 33

d. Bonding is not possible

Question 34

Line and ground connecting conductors for lightning arrester shall not be smaller than ____ sq. mm copper or _____ sq. mm aluminum. a. 3.5, 5.5 b. 2.0, 3.5 c. 5.5, 8.0 d. 3.5, 8.0

Answer 34

b. 2.0, 3.5

Question 35

For Circuits of 1kV and over, conductors between the surge arrester and the line and the surge arrester and the grounding connection shall not be smaller than ______ sq. mm copper. a. 8.0 b. 14.0 c. 2.0 d. 5.5

Answer 35

b. 14.0

Question 36

For a wye-start, delta-run connected motor, the selection of branch-circuit conductors on the line side of the controller shall be based on the motor full-load current. The selection of conductors between the controller and the motor shall be based on _____ percent of the motor full-load current. a. 58 b. 73 c. 15 d. 25

Answer 36

a. 58

Question 37

Where one or more of the motors of the group are used for short-time, intermittent, periodic, or varying duty, the ampere rating of such motors to be used in the summation shall be for the highest rated motor, the greater of either the ampere rating or the largest continuous duty motor full-load current multiplied by _____ shall be used in the summation. a. 0.8 b. 1 c. 1.25 d. 2.5

Answer 37

c. 1.25

Question 38

Each autotransformer 600 volts, nominal, or less shall be protected by ________ device installed in series with each _____ input conductor. Such overcurrent device shall be rated or set at not more than 125 percent of the rated full-load input current of the autotransformer. a. an individual overcurrent, ungrounded b. disconnect, ungrounded c. an individual overcurrent, grounded d. disconnect, grounded

Answer 38

a. an individual overcurrent, ungrounded

Question 39

Grounding autotransformers can either be _________ connected to 3-phase, 3-wire ungrounded systems for the purpose of creating a 3-phase, 4-wire distribution system or providing a neutral reference for grounding purposes. Such transformers shall have a continuous per-phase current rating and a continuous neutral current rating except for a. zigzag transformers b. T-connected transformers c. buck or boost d. vertex grounded delta

Answer 39

d. vertex grounded delta

Question 40

A fault-sensing system that causes the opening of a main switch or common-trip overcurrent device for the 3-phase, 4-wire system shall be provided to guard against a. single-phasing or internal faults b. double fed fault c. three phase fault d. series fault

Answer 40

a. single-phasing or internal faults

Question 41

An overcurrent protective device of adequate short-circuit rating that will open simultaneously all ungrounded conductors when it operates shall be applied in the grounding autotransformer branch circuit and shall be rated or set at a current not exceeding 125 percent of the autotransformer continuous per-phase current rating or ___ percent of the continuous-current rating of any series connected devices in the autotransformer neutral connection. a. 53 b. 42 c. 125 d. 73

Answer 41

b. 42

Question 42

A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply a. circuit breaker b. disconnect c. switcher d. isolator

Answer 42

b. disconnect

Question 43

The case or housing of apparatus, or the fence or walls surrounding an installation to prevent personnel from accidentally contacting energized parts or to protect the equipment from physical damage. a. fitting b. box c. enclosure d. junction box

Answer 43

c. enclosure