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WorksheetsPhilippine Electrical Code Practice Exam
Total questions: 100
Worksheet time: 50mins
Where the allowable current rating of a busway does not correspond to a standard rating of overcurrent device, what rating is permitted?
The next lower rating
No overcurrent protection is required
The next higher rating
none of these
A conduit run between outlets, between fittings, between outlet and fitting shall not contain more than the equivalent of m quarter bends.
2
3
4
5
The difference between a neutral and a grounded circuit conductor is 1 ____.
only a neutral will have equal potential to the ungrounded conductor
only a neutrals outer covering is white or natural gray
only a neutral carry unbalanced current
there is no difference
Which of the following receptacles may be connected to the small appliance branch circuit?
Outside receptacles
Electric clock in a dining room
Hallway receptacle which is within 6 meters of kitchen
Garage ceiling receptacle for automatic garage door open
The connection between the grounded circuit conductor and the equipment grounding conductor at the service is called the _ bonding jumper.
circuit
equipment
main
appliance
For a a one-family dwelling, at receptacle outlet is required in each _____.
attached garage
detached garage with power
basement
all of these least one
Conductors supplying two or more motors shall have an ampacity equal to the sum of the full load current rating of all the motors plus ____% of the highest rated motor in the group.
25
100
80
125
The MAXIMUM voltage allowed to supply listed electric-discharge lighting in residences, hotels, motels, and similar occupancies shall not exceed ______.
230 volts
208 volts
240 volts
277 volts
A branch circuit that supplies two of receptacles or outlets for lighting more and appliances is a _____.
individual
multi-purpose
general purpose
utility
If a conductor material is not specified in a particular Article or Section, the material shall be assumed to be which of the following?
Copper
Aluminum
Copper-clad aluminum
no assumptions shall be made
A current limiting overcurrent protective device in the faulted circuit. is a device which will ____ the current flowing in the faulted circuit.
reduce
increase
maintain
none of these
What rating of disconnecting means shall be used in a branch circuit containing 21.5 amperes?
20 A
25 A
30 A
40 A
In any watercraft, receptacle outlets operating at ____ or more shall have a grounding pole.
100 V
120 V
50 V
60 V
"Concealed" as applied to electrical wiring means, _______.
rendered inaccessible by the structure
capable of being removed without damage finish of the building
capable of being reached quickly
admitting close approach
The grounded conductor at a service entrance shall not be smaller than the required size of the ________ conductor.
phase
service
equipment
grounding electrode
Where a change occurs to the size of the ungrounded conductor, a similar change may be made in the size of the conductor.
neutral
grounding
grounded
none of these
The circuit is that portion of a wiring system beyond the final overcurrent protection.
lighting
feeder
signal
branch
Plug fuses must have what specific shape?
octagonal
Square
hexagonal
Round
Branch circuit conductors supplying a single- phase motor shall have an ampacity NOT exceeding _____
100%
200%
125 %
115 %
If the spring tension on a cartridge fuse clip is weak, the result most likely would be _____
the fuse would blow immediately
the fuse clips would become warm
the voltage to the load would increase
the supply voltage would increase
Auxiliary gutters shall not contain more than ______ current carrying conductors at any cross section.
36
32
30
24
The Code requires which of the following colors for the equipment grounding conductor?
White or gray
Green or green with yellow stripes
Yellow
Blue with a yellow stripe
The grounding electrode shall be installed such that ____ mm of length is in contact with the soil
1 800
1 200
1 500
2 400
A ____ shall be used to connect the grounding conductors, the service equipment enclosures, and equipment where the system is grounded, the grounded service conductor to the grounding electrode(s).
busbar
neutral conductor
solid ground wire
grounding electrode conductor
Separation of junction box from motor shall be permitted to be separate from the motor not more
6 feet (1.8 meters)
4 feet (1.2 meters)
8 feet (2.5 meters)
none of these
What is the MINIMUM size THW copper conductor that maybe used on a 30-A branch circuit?
2.0 mm2 (No. 14 AWG)
3.5 mm2 (No. 12 AWG)
5.5 mm2 (No. 10 AWG)
8.0 mm2 (No. 8 ANG)
Concrete and brick walls are considered which of the following?
Dry locations
Wet locations
Insulators
Grounded
Junction box shall be installed ______.
accessible
readily accessible
visible
all of these
The definition of accessible (conductor) is_____
admitting close approach
not guarded by locked doors, elevation, and others
not permanently closed in by the building or structure
all of these
The part of an electrical system that performs a mechanical function rather than an electrical function is called ________
receptacle
device
fitting
outlet
The connection of a ground clamp to a grounding electrode shall be _________
accessible
visible
readily accessible
in sight
A service disconnect means which of the following locations? shall be installed in
Inside or outside of the building
At nearest point of entrance to a structure
Within 3 feet of the electrical panel
all of these
An enclosure either above or below ground, with resistant exclusively walls, ceiling and floor built for unattended transformers and their auxiliaries.
Transformer housing
Transformer yard
Transformer vault
none of these
In dwelling units, at LEAST one wall receptacle outlet shall be installed in bathrooms within _____ mm of the outside edge of each basin.
150
900
1 200
450
A separate portion of a conduit or tubing system that provides access through removable cover(s) to the interior of the system at junction of two or more sections of the system or at the terminal point of the system is defined as a _______.
conduit body
conduit junction
conduit intersection
conduit T-connector
When the resistance-to-ground of a single ground rod exceeds 25 Q
the ground rod must be removed
no additional electrodes are required
at least one additional electrode must be installed
it must be connected to a PVC pipe at least 15 m in length
Surge arresters grounding conductors shall NOT be run in metal enclosures unless of such enclosures.
bonded to both ends
bonded in one end
bonded outside
bonded inside
In concealed knob and tube wiring the supports shall have at least ______ of each tap.
125 mm
100 mm
150 mm
170 mm
What is the smallest size fixture wire allowed?
2.0 mm2 (No. 14 AWG)
1.25 mm2 (No. 16 AWG)
0.75 mm2 (No. 18 AWG)
0.51 mm2 (No. 20 AWG)
Conduit installed in a concrete slab is considered a ______.
damp location
moist location
wet location
dry location
Locknuts are sometimes used in making electrical connections on studs. In these cases, the purpose of the locknuts is to ________.
to be able to connect several wires to one stud
make it difficult to tamper with the connection
make a tighter connection
prevent the connection from loosening under vibration
The Code rule for MAXIMUM 90-degree bends in a conduit between two boxes is the most likely reason for the total Four, 360-degree limitation is ______.
it is unsafe
it makes pulling the conductor through the conduit too difficult
you can damage the galvanized coating on the conduit
too many bends require extra wire to be pulled
______ is defined as the shortest distance measured between a point on the top surface of any direct buried conductor, cable, conduit, raceway and the top surface of finished grade.
Depth
Cover
Gap
Soil
A length of 50 feet wire has a resistance of 10 ohms. How much is the resistance of 25 feet its length.
5
3
15
75
Corner joints on a gutter shall be made tight, where the assembly is held together by rivets or bolts. The spacing shall not be more than ________.
250 mm
100 mm
300 mm
200 mm
A short length of a conductor used to make a connection between terminals or around a break in the circuit is a ______.
jumper
bonding wire
tie wire
guy wire
Where conductors carrying alternating current are installed in metal enclosures or metal raceways, they shall be so arranged as to avoid heating the surrounding metal by induction, to accomplish this _____ shall be grouped together.
all phase conductors
where used, the grounded conductor
all equipment grounding conductors
all of these
Type TW conductor is a ______ type.
heat resistant and thermoplastic
moisture and heat-resistant thermoplastic
moisture and heat-resistant
moisture resistant and thermoplastic
The definition of ampacity is _______.
the current-carrying capacity of conductors expressed in volt-amps
the current-carrying capacity expressed in amperes
the current-carrying capacity of conductors expressed in wattage
the current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating
__________ is a wiring method using knobs, tubes, and flexible non-metallic tubing for the protection and support of single insulated conductors concealed in hollow spaces of walls and ceilings of buildings.
Knob and tube wiring
Open wiring on insulators
Open wiring with knobs, tubes, etc.
Concealed knob and tube wiring
Conductor sizes are expressed ______.
only in circular mils
In millimeter or in square millimeter
in diameter or area
in AWG or millimeters
A fitting is ______.
part of a wiring system that is intended primarily to perform an electrical function
pulling cable into a confined area
to be suitable or proper for
part of a wiring system that is intended primarily to perform a mechanical function
Nood used for decoration on a sign must not be closer to a lamp holder than ____.
150 mm (6 inches)
300 mm (12 inches)
75 mm (3 inches)
50 mm (2 inches)
Comparing a 14 mm conductor to a 5.5 conductor of equal lengths, the 14 mm2 will have lower _____
cost
weight
resistance
strength
The MINIMUM size of wire used in electrical wiring is the former number # 14 AWG. Under the metric system listed in the PEC, the diameter is _______.
2.0 mm
3.2 mm
1.6 mm
2.6 mm
Type MI cable shall NOT be used ______.
in dry, wet, or continuously moist location
where exposed conditions to destructive corrosive
for services, and feeders
all of these
A conductor encased within material of composition or thickness that is recognized by the PEC as electrical insulation is known as a/an ______.
bare conductor
a covered conductor
concealed conductor
an insulated conductor
For screw shell devices with attached leads, the conductor attached to the screw shell shall be ____ in color.
white or gray
green
orange
black
An assembly of two or more single-pole fuses is which of the following?
Multiple fuse
Multiple-tap conductor
Switching device
Panelboard
The value of current, time, or both at which an adjustable circuit breaker is set to trip is known as ____.
inverse time
ampacity
automatic
setting
______ any electric circuit that energizes signaling equipment.
Low voltage circuit
Signaling circuit
Feeder
Branch circuit
What must the ampere rating be for a disconnecting means for a motor circuit rated 600 volts nominal, or less?
100 of the motor nameplates current of the motor
At Least 125 & of the full-load current rating of the motor
At least 115 & of the full-load current rating
At least 150 & of the full-load current rating of the motor
______ lighting is a string of outdoor lights suspended between two points.
Pole
Equipment
Festoon
Outline
An autotransformer must have a continuous neutral current rating, in a 4-wire system sufficient to handle _____.
the minimum neutral unbalanced load
the minimum neutral balanced load
the maximum possible neutral unbalanced load
the maximum neutral load in the system
The PEC 1 2017 edition was referenced from the _____ edition of the National Electrical Code.
2003
2004
2017 from the
2006
Use an approved ______ to protect conductors from abrasion where they enter a box.
locknut
all thread
bushing
insulator
The MINIMUM headroom of working spaces service equipment and motor control for centers shall be at least _____.
1 800 mm
2 000 mm
5 500 mm
6 700 mm
The name given to a system or circuit conductor that is intentionally grounded is ____.
grounding conductor
bonding conductor
high-leg conductor
grounded or neutral conductor
The MAXIMUM size rigid metal conduit allowed for electrical construction is ____.
100 mm
150 mm (2009)
155 mm (2017)
300 mm
Electric power is a measure of ____.
work wasted
electromotive force
total work performed
rate at which work is performed
Raceways shall be provided with _____ to compensate for thermal expansion and contraction.
accordion joints
thermal clamps
expansion joints
thermal fittings
The cross-sectional area of three or more THW conductors in a conduit must not exceed what percent of the cross-sectional area conduit?
30 %
40 %
50 %
60 %
______ must not be allowed to come in contact with interior parts of electrical equipment.
Insulators
Busbars
Terminals
Abrasives
If safety switches are horsepower rated; the rating must be marked on the switch as well as ______.
Current and voltage rating
voltage and wattage rating
current and resistance rating
voltage and resistance rating
An unintentional, electrically conducting connection between an ungrounded conductor and normally non-current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth, is called ____.
arc fault
stray current
ground fault
high impedance
A circle with the letter B stands for _____.
buzzer outlet
pushbutton outlet
outlet with blank cover
bell outlet
The PEC uses the term "isolated" to mean ____.
not readily accessible to person unless special means for access are used
grouped together
identifiable by means of color coding or nameplate
nearby conductors shall be used
______ conductors shall be used for wiring on fixture chains and other moveable parts.
Solid
Covered
Insulated
Stranded
When a fuse or circuit breaker is used for circuit protection, the fuse or overcurrent trip unit shall be connected _____.
in series
in series and parallel
in parallel
in tandem
A compartment to which one or more air ducts are connected to form part of an air distribution system is called which of the following?
Plenum chamber
Air-flow box
Ventilation duct
Circulation cavity
The conductors between the point of termination of the overhead service drop or underground service lateral and the main disconnecting device is in the building are known as _____.
service disconnecting
service conductors
service drop
service-entrance equipment
Sometimes mercury toggle switches are used in place of a regular toggle switch because they _____.
are easier to connect
do not wear out as quickly
are less expensive
they glow in the dark
When circuit breakers are installed in enclosed switchboards, they are usually derated to a certain percentage. What is this percentage?
60 %
80 %
50 %
70 %
Capable of being inadvertently touched or approached nearer than a safe distance by a person. It is applied to parts that are not suitably guarded, isolated, or insulated.
Isolating switch
By-pass isolation switch
Exposed (as applied to wiring methods)
Transfer switch
What is the diameter of a solid wire, which is equivalent to 5.5 mm2?
2.26 mm
1.62 mm
1.75 mm
2.65 mm
The demand factor of any electrical system is the ratio of the MAXIMUM demand for a system to _______.
the total connected load of the system
125 percent of the total connected load of the system
125 percent of the total connected continuous load of the system
80 percent the total connected the noncontinuous load plus 125 percent total connected continuous load of the system
The rating of the overcurrent protective device circuit supplying hermetic motor-compressor must be at least ______ of the nameplate rated load current.
80%
155%
125%
135%
A dry type of transformer not rated over 112 1/2 kVA installed indoors, shall have a separation of at least ______ from combustible material.
600 mm
450 mm
300 mm
900 mm
When using a phase converter for a fixed load, the single-phase conductors must have an ampacity not less than what percentage of the full-load current rating of the motor or other load being served where the input and output voltages are the same ______.
300%
250 %
150%
175 %
The Code requires all circuits to have _____ and adequate grounding.
at least two wires
outlets
breakers
lightings
The branch-circuit loads specified by the Code for lighting and receptacles are considered _____.
minimum loads
maximum loads
loads to be served
peak loads
A location classified as _______ may be temporarily subject to dampness and wetness.
dry
damp
moist
wet
The service conductors between the terminals of the service equipment and a point usually outside the building, clear of building walls, where joined by tap or splice to the service drop is called the ____.
service drop
service-entrance conductors
service equipment
none of these
Screw-shell lamp holders shall be wired so that the _______ conductor is connected to the screw-shell.
bare
ungrounded
grounded
grounding
A single receptacle on an individual branch circuit shall have a MINIMUM rating of what percentage of the branch circuit's rating?
50%
70 %
80%
100 %
A pool recirculating pump motor receptacle shall be permitted not less than ____ mm from the inside walls of the pool.
1 500
3 000
2 300
3 600
Operation at a substantially constant load for an indefinitely long time.
Periodic duty
Continuous duty
Intermittent duty
Short time duty
In concealed knob and tube wiring, the clearance to be maintained between conductors is ______.
55 mm
45 mm
75 mm
50 mm
Electrical parts that are not suitably guarded, isolated, or insulated and are capable of being inadvertently touched or approached near than a safe distance by a person is known as ______.
dead front
exposed
externally operable
accessible
Concealed knob and tube wiring conductors shall be rigidly supported on knobs not more than a certain minimum distance apart. What is this distance?
2 000 mm
1 500 mm
1 400 mm
2 500 mm
