51. For each 2-wire laundry branch circuit, a
feeder load of NOT less than ______ shall be
included.
56. This type of cable is a fabricated assembly of
insulated conductors enclosed in a flexible metal
sheath.
Answer: B. 1,500 VA
Answer: D. Armored cable
52. The computed load for the branch circuit
installed to supply exterior signs and outline
lighting shall be computed at a minimum of
______ volt-amperes.
57. The following are common splicing rules
EXPECT one. Which one is this?
Answer: D. Wires of the same should be spliced
together in line.
Answer: A. 1,200
53. Non-metallic boxes shall be permitted only
with ______.
58. Service entrance cables shall be supported by
straps or other approved means within _______
of every service head
Answer: D. all of these
Answer: A. 300 mm
A. concealed knob and tube wiring
59. A point in a wiring system at which current is
taken to be used in some equipment
B. non-metallic sheathed cable
Answer: D. Outlet
C. open wiring on insulators
D. all of these
60. The clearance from the top of a switchboard
to a ceiling which is combustible shall NOT be
less than_________.
54. A building or other structure serve shall be
supplied by only one service drop EXCEPT for
Answer: A. 1,000 mm
Answer: D. all of these
A. multiple occupancy building
B. fire pumps
C. emergency electrical system
D. all of these
55. Air terminals exceeding 600 mm in height
shall be supported at a point NOT less ______ of
its height.
Answer: C. one-half
A. three-fourths
B. two-fifth
61. In concealed knob and tube wiring, the
clearance to be maintained between conductors
is
Answer: C. 76 mm
62. What is the total number of mechanical
degrees that a PVC conduit run maybe bent
between pull points (pull boxes, junction boxes or
utility boxes)?
Answer: A. 360 degrees
63. The sum of the cross sectional area of all
conductors in a wireway must not exceed ____
percent of the cross-sectional area of the
wireway.
Answer: B. 20
C. one-half
64. A lighting fixture shall be wired with a flexible
lighting cord with a cross section area of NOT less
D. one-third
Answer: A. 0.75 mm2
65. Flexible metal conduits must not be used in
80. ______ are used on conduits and are located
inside and outside of the box.
Answer: D. all of these
Answer: C. Locknuts
A. wet locations
B. hoistways
C. storage battery rooms
D. all of these
66. What is the maximum operating temperature
of type THWN conductor?
Answer: A. 75°C
67. A conductor encircling a building and
interconnecting all ground terminals?
Answer: D. Counterpoise
68. The use of surface nonmetallic raceway may
NOT be used in the following locations EXCEPT
one. Which
75. Cables operated at over ______ shall be
shielded.
Answer: A. 2,000 V
76. The nearest ground terminal shall NOT less
than______ from the foundation wall.
Answer: D. 600 mm
77. The circuit conductors between the service
entrance equipment or isolated generating plant
and the branch circuit overload device or devices.
81. No parts of cord connected fixtures, hanging
fixtures or pendants shall be located within a
zone measured ______ horizontally from a
bathtub rim.
Answer: A. 900 mm
82. Busbars shall be copper having a minimum
conductivity of ______.
Answer: D. 97%
83. What is the temperature rating of THW
insulation?
Answer: C. 75°C
84. Individual open conductors and cables other
than service cables shall NOT be installed
within______ of every grade level.
Answer: A. 3,100 mm
85. An insulated grounded conductor of 14 mm2
or smaller shall be identified by a continuous
____ outer finish along its entire length.
Answer: D. white or natural gray
86. Messenger support wiring is permitted only in
______ establishments where maintenance
personnel service the system.
Answer: A. industrial
Answer: B. feeder
87. In damp or wet locations, boxes and fittings
should be properly placed or insulated to prevent
78. Conductors shall be securely attached to the
buildings using fasteners. Fasteners shall be
spaced NOT more than
Answer: B. water from entering the box or
fitting
Answer: D. 900 mm
79. The minimum diameter of air terminal used
at the top of a heavy duty smoke or vent stacks
shall be ____, exclusive of the corrosion
protection.
Answer: B. 15 mm
88. Equipment having an open circuit voltage
exceeding ____ shall NOT be installed in dwelling
occupancies.
Answer: B. 300 V
89. Connected knob and tube wiring conductors
shall be rigidly supported on knobs not more than
a certain minimum distance apart. What is this
distance?
98. Open wiring on insulators shall be permitted
for wiring systems of ____ or less.
Answer: C. 1,300 mm
Answer: D. 600 V
90. Which of the following materials is used to
support the conductor in the open wiring
method?
99. The branch circuit conductors that supply one
or more units of data processing systems shall
have an ampacity not less than ____ percent of
the total connected load.
Answer: D. split knobs
Answer: C. 125
91. The minimum size of type IGS cable shall be
Answer: B. 125 mm
2
100. Communication cable and wires shall have a
voltage rating NOT less than _____.
Answer: B. 300 volts
92. Watercraft’s switchboards shall be provided
with a clear working space of at least ____ at the
front.
101. Metal clad cables shall be permitted for
installations in the following locations EXCEPT
one. Which one is this?
Answer: D. 1,000 mm
Answer: C. Direct burial in the earth
93. For grounding electrode to which portable or
mobile equipment system neutral impedance is
connected, shall be isolated from the ground by
at least a certain distance from any other system
or equipment grounding electrode. What is this
distance?
Answer: B. 6,000 mm
94. Which of the following metals is the best
conductor of electricity?
Answer: D. Copper
95. Incandescent lamp fixtures shall be marked
to indicate the allowable wattage of lamps. The
markings shall be permanently installed in letters
at least ______ high.
Answer: B. 6.4 mm
96. If the duty cycle of a motor-generator arc
welder is 100%, the supply conductors shall NOT
be less than______ of its rated primary
nameplate current.
102. A 15-A or a 20A branch circuit shall be permitted to
supply lighting units and other utilization devi
ces. The rating of any one cord and plug
connected appliance shall
NOT exceed a certain percentage of the bran
ch circuit rating. What is this percentage?
Answer: A. 80%
103. The bonding conductor used in agricultural
buildings shall
be copper, insulated, covered or bare, NOT s
maller than ______.
Answer: A. 8.0 mm²
104. In any watercraft, the motor circuit shall
have an ampacity
of NOT less than ____ of the motors full lo
ad current rating.
Answer: B. 100%
105. The largest size of electric metallic tubing is
Answer: C. 100%
97. Most wires used in residential house wiring
are usually insulated by
Answer: C. Thermoplastic
Answer: D. 100 mm
106. The overload relay used to protect each
motor compressor set shall be selected to trip
at NOT more than ____ of the motor-compressor
rated load current.
Answer: D. 140%
107. Lamp protection shall be provided by
elevation of at least ______ meters from the
normal working surface.
Answer: A. 2
108. Type UF cables shall NOT be used ______.
Answer: B. as service entrance
109. Where “U” pulls are made on the pull
box, the distance
between each raceway entry inside the box
and the opposite wall of the box shall NOT be
less than ____ times the trade diameter of the
largest raceway in a row.
Answer: C. 6
110. Reference ambient temperature for explo
sion proof electrical equipment shall be ____
degree Celsius.
115. Which of the following colors identifies t
he grounded conductor of a branch circuit?
Answer: C. White
116. An enclosure of porcelain or other insul
ating materials
fitting with terminals and intended for connec
ting the flexible chord carrying a pendant to the
permanent wiring.
Answer: A. Rosette
117. Receptacles installed for the attachment of
portable cords shall be rates at NOT lest than
____ 250 V.
Answer: D. 15 A
118. Motors with marked service factor
of less than 1.15 shall have an overload
protection equal to ____ percent of the motor’s
FLA.
Answer: D. 115
Answer: C. 50
111. Welding process wherein coalescene is p
roduced by heating with an electric arc with or
without the application of pressure and with or
without the use of filler metal.
Answer: C. Arc welding
112. The use of underground feeder cables may
NOT be used
in the following conditions EXCEPT one. Whic
h one is this?
119. Cables and cords supplied through plug
ging boxes shall be of
Answer: B. copper
120. Which of the following statement is NOT
correct?
Answer:C.
Overcurrent devices maybe located inside
clothes closets
Answer: C. Direct burial
121. A conductor or group of conductors, in
switch-gear assemblies which serves as a
common connection for two or more circuits.
113. Face plates of insulating materials shall
be noncombustible and less than ____ in
thickness.
Answer: A. Bus
Answer: A. 2.5 mm
122. The ampacity of capacitor circuit conduc
tors shall not be less than ____ of the rated
current of the capacitor.
114. Conductors supplying two or more moto
rs shall have an ampacity equal to the sum of
the FLA rating of all motors plus ____ of the
highest motor FLA in the group.
Answer: D. 25%
Answer: C. 135%
123. The alternate or Backup source of power in a hospital shall have a
capacity to sustain its connected loads for a
minimum of ______.
Answer: A. 1.5 hours
124. Cable trays shall NOT be used in ______.
Answer: A. hoistways
125. The load for the required branch circuit
installed for the
supply of exterior signs or outline lighting sh
all be computed at a minimum of ____ voltamperes.
132. A hoisting and lowering mechanism
equipped with a car or platform which moves in
guides in a substantially vertical direction and
which serves two or more floors of a building or
structure.
Answer: C. Elevator
133. An assembly of a flexible cord with an
attachment plugs on one end and a cord
connector on the other.
Answer: B. 1,200
Answer: A. Extension cord
126. The usual function of a disconnect switches
in high voltage circuits is to
134. Any box not over _____cm³ in size,
intended for mounting
in closed building construction shall; be affixe
d with
anchors or clamps as to provide a rigid and
secure installation.
Answer:
A. isolate from energized buses, equipme
nt which are not in service
127. Pendant conductors where not cabled a
nd longer than a certain length shall be
twisted. What length is this?
Answer: B. 900 mm
128. The ampacity of the phase conductors from
the generator terminals to the first over current
device shall NOT be less
than ____ percent of the nameplate current
rating of the generator.
Answer: D. 1,640
135. In battery rooms with
alkaline batteries, the shelves shall be lined
with steel sheet NOT less than _____ thick.
Answer: D. 75 mm
136. A disruptive discharge around or over t
he surface of a solid or liquid insulator.
Answer: C. Flashover
Answer: C. 115
129. What is the maximum number of
conductors permitted in a
wireway at any crosssection, signal circuit or starter-control wires
are not included?
137. Emergency lighting of ____ lux shall be
provided in exit paths from all areas of
attended stations.
Answer: A. 10
138. An overheated cord often indicates
Answer: A. 30 conductors
130. Each motor shall be provided with how
many disconnects?
Answer: C. Only one
Answer: C. corroded terminals and detective
cord
139. Individual arrester grounding conductors
shall be no smaller than ____ copper.
131. Energized parts of a generator operated
at more then ______ volts to ground shall
NOT be exposed to accidental contact where
accessible t0 unqualified persons.
Answer: B. 14 mm²
Answer: A. 50
Answer: D. Lamp
140. A generic term for an artificial source of
light.
141. Cable bus shall securely supported at in
tervals NOT exceeding
Answer: A. 3,600 mm
142. Snap switched used with open wiring o
n insulators shall
be mounted on insulating material that separ
ates the conductors at least ____ from the
surface wired over.
Answer: D. 13 mm
143. The usual nameplate data on DC motors
include the following EXCEPT one. Which one is
this?
Answer: B. Rated frequency
144. Vertical runs of wireways shall be secur
ely supported at intervals NOT exceeding ____.
Answer: D. 4,500 mm
145. Size 0.75 mm² fixture wire has an ampacity
of
Answer: A. 6 A
146. Type MI cable shall NOT be used ____.
Answer: B. where exposed to destructive
corrosive locations
147. Each receptacle for DC plugging boxes
shall be rated at NOT less than _____.
Answer: B. 30 A
148. Insulated ground conductor of 14 mm² or
smaller shall be
identifies by a continuous while outers along
its entire length or another color which is
Answer: B. natural gray
149. Metal covers for boxes shall be lined fir
mly attached insulating material not less than
____ in thickness.
Answer: A. 0.80 mm
150. Electrical non-metallic tubing shall NOT be
used where the voltage is over
Answer: D. 600 V