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