MASTER SIGN ELECTRICIAN TEST 2 2020
GIVEN THIS SCENARIO: THE PRIMARY PLUS SECONDARY TAP IS 22 FEET IN LENGHT; THE MAIN FEEDER IS 111 AMPERES; AND THE FEEDER OVERCURRENT PROTECTION IS 125 AMPERES. THEN A TRANSFORMER FEEDER TAP IS MADE, THE MINIMUM AMPACITY PERMITTED FOR THE TAP CONDUCTORS IS HOW MANY AMPERES?
42
THE MAXIMUM RATING FOR THE MOTOR-BRANCH CIRCUIT, NON-TIME-DELAY FUSE THAT PROTECTS A WOUND-ROTOR, 2-HP, SINGLE-PHASE, 115- VOLT MOTOR IS ____ AMPERES. (ASSUME THE LOWER STANDARD RATING WHEN TRIED WILL NOT HOLD THE STARTING CURRENT)
45
CALCULATE, HOW MANY SINGLE-POLE 15-AMPERE BRANCH CIRCUITS ARE NEEDED FOR LIGHTING IN A 3000 SQ-FT HOUSE WITH A 120/240-VOLT SERVICE?
5
ACCORDING TO THE NEC; BUSWAYS SHALL BE SECURELY SUPPORTED AT INTERVALS NOT EXCEEDING___ UNLESS THE REACEWAY IS OTHERWISE DESIGNED AND MARKER
5 FEET
DISREGARDING EXEPTIONS, THE MAXIMUM OVERCURRENT PROTECTION PROTECTION FOR THE PRIMARY OF 240 VOLT TRANSFORMER WITH PRIMARY CURRENT OF 40 AMPERES IS ______ AMPERES
50
GIVEN THIS SCENARIO: A JUNCTION BOX CONTAINING A COMBINATION OF CONDUCTORS, ALL PART OF THE SAME SYSTEM. THE CONDUCTORS INCLUDE THREE 6 AWG UNGROUNDED CONDUCTORS, ONE 8 AWG EQUIPMENT GROUNDING CONDUCTOR, THREE 6 AWG GROUNDED CONDUCTORS, THREE 12 AWG UNGROUNDED CONDUCTORS, ONE 12 AWG GROUNDING CONDUCTOR, THREE 12 AWG GROUNDED CONDUCTORS AND TWO CLAMPS. THIS JUNCTION BOX MUST BE AT LEAST HOW MANY CUBIC INCHES
51.5
GVEN: FOR A 41-UNIT APARTMENT COMPLEX, A NEW 4500-WATT ELECTRIC CLOTHES DRYER WILL BE INSTALLED IN EACH UNIT. FOR CALCULATING THE SERVICE LOAD FOR THE 41-UNIT APARTMENT COMPLEX, THE CALCULATED LOAD TO BE USED FOR ALL CLOTHES DRYERS IS ____ VA, AND THE MINIMUM LOAD FOR THE NEUTRAL CONDUCTOR IS ___ VA
53300 37310
GIVEN: A 3 PHASE SYSTEM HAS A LINE CURRENT OF 150 AMPERES AND LINE VOLTAGE OF 208 VOLTS. DETERMINE THE TOTAL VOLT-AMPERE LOAD FOR THE ABOVE.
54,040
WHAT IS THE MINIMUM KV CONDUCTOR RATING CAN BE USED FOR GREATER 1000 VOLTS NEON SECONDARY WIRING?
5KV
RIGID NON METALLIC RACEWAY TYPE PVC WITH A LARGER SIZE THAN METRIC DESIGNATOR 155 (TRADE SIE ___) SHALL NOT BE USED.
6 INCHES
FOR FIELD INSTALLED SKELETON TUBING, THE NEON TUBING AND CONDUCTORS SHALL BE SUPPORTED NOT MORE THAN
6 INCHES FROM THE ELECTRODE CONNECTION
GIVEN AN INDUCTION-TYPE MOTOR HAS THE FOLLOWING NAMEPLATE INFORMATION FLA RATING OF 54 AMPERES, TEMPERATURE RISE OF 50 DEGREES C. THIS MOTOR REQUIRES NO SPECIAL INCREASE IN THE SIZE OF THE OVERLOAD-PROTECTION DEVICE FOR STARTING CURRENT. WHAT IS THE MAXIMUM OVERLOAD-PROTECTION DEVICE RATING IN AMPERES, RESPONSIVE TO MOTOR CURRENT, FOR THIS MOTOR?
62.1
GIVEN: THREE 240 VOLT LOADS OF 15000 VA FIXED ELECTRIC SPACE HEATER A 720 VA BLOWER MOTOR AND A 6000 VA AIR CONDITIONING UNIT ARE SERVED FROM A 240 VOLT, SINGLE PHASE FEEDER. THE MINIMUM CONDUTOR AMPACITY FOR THIS FEEDER IS _____ AMPERES
66
GIVEN: THREE MOTORS WITH FULL LOAD AMPERE RATINGS OF 10 AMPERES, 20 AMPERES AND 30 AMPERES ARE FED BY ONE FEEDER. THE FEEDER CONDUTORS MUST HAVE AN AMPACITY OF AT LEAST _______ AMPERES
67.5
GIVEN THIS SCENARIO: THE COOKTOP IS 12000 VOLT AMPERES. THE MINIMUM COPPER CONDUCTOR SIZE ALLOWED FOR A 240 VOLT BRANCH CIRCUIT WHICH SUPPLIES A SINGLE COOKTOP IS HOW MANY AWG
8
CALCULATE IN ORDER TO SERVE A 15700 VA NONCONTINUOUS LIGHTING LOAD, HOW MANY 120 VOLT 15 AMPERE CIRCUITS WOULD BE REQUIRED?
9
GIVEN: A WOUND-ROTOR, NO-CODE-LETTER, 2-HP, SINGLE-PHASE, 115-VOLT MOTOR HAS BRANCH-CIRCUIT CONDUCTORS THAT ARE PROTECTED BY A NON-TIME DELAY FUSE (ASSUME THE MAXIMUM NON-TIME DELAY FUSE RATING, WHEN TRIED, WILL NOT HOLD THE STARTING CURRENT). WHAT IS THE MAXIMUM RATING FOR THE MOTOR BRANCH-CIRCUIT?
90
A 3 PHASE 480 VOLT SYSTEM IS BALANCED WITH A 30KVA LOAD PER PHASE. WHAT IS THE LINE CURRENT, GIVEN AN ACTUAL 80000 VA TOTAL LOAD?
96.22
WHERE CORROSION PROTECTION IS NECESSARY AND THE RMC CONDUIT IS THREADED IN THE FIELD, THE THREADS SHALL BE COATED WITH___ MATERIAL COMPOUND.
AN APPROVED, ELECTRICALLY CONDUCTIVE, AND CORROSION-RESISTANT
METAL RECEWAYS, CABLE ARMOR, AND OTHER METAL ENCLOSURES FOR CONDUCTORS SHALL BE METALLICALLY JOINED TOGETHER INTO CONTINUOUS
ELECTRICAL CONDUCTOR
AN INSTALLATION USING RMC SHALL NOT HAVE MORE THAN THE EQUIVALENT OF ___ QUARTER BENDS (360 DEGREES TOTAL) BETWEEN PULL POINTS FOR CONDUIT BODIES AND BOXES
FOUR
IN HEALTH CARE FACILITIES PATIENT BED LOCATION, EACH PATIENT BED LOCATION SHALL BE SUPPLIED BY AT LEAST TWO BRANCH CIRCUITS, AND THE BRANCH CIRCUIT SERVING PATIENT BED LOCATIONS ________.
SHALL NOT BE PART OF A MULTIWIRE BRANCH CIRCUIT
MAIN BONDING JUMPERS SHALL NOT BE CONNECTED USING
SHEET METAL SCREWS
WHICH OF THE FOLLOWING DESCRIBES THE SERVICE POINT?
THE CONNECTION BETWEEN THE SERVICING UTILITY AND THE PREMISES WIRING
AN UNBROKEN LENGTH OF RMC OR IMC SHALL BE PERMITTED TO SUPPORT A LUMINAIRE IN A BILLBOARD IN LIEW OF A BOX IF WHICH OF THE FOLLOWING IS MET
THE LUMINAIRE MAY BE INSTALLED 12 FEET ABOVE GRADE IF THE BILLBOARD IS UNQUALIFIED PERSON ACCESSIBLE
ACCORDING TO THE NEC, WHICH ENCLOSURE TYPE LETTER WOULD BE REQUIRED IF THE INSTALLATION WAS A MOTOR CONTROLLER INSTALLED OUTDOORS, THAT WAS A SUBJECT TO BAD WEATHER SUCH AS HEAVY RAIN AND SNOW?
TYPE 3
CONDUTORS SHALL ONLY BE USED FOR EQUIPMENT GROUNDING PURPOSES IF THEY HAVE A CONTINUOUS GREEN COLOR OR A CONTINUOUS GREEN COLOR WITH ONE OR MORE
YELLOW STRIPES
GIVEN THIS SCENARIO: FOUR 6 AWG TW, THREE 10 AWG THHN, AND FIVE 8 AWG THHN. CALCULATE THE CROSS-SECTIONAL AREA, IN SQUARES INCHES, FOR THE ABOVE COMBINATION OF COPPER CONDUCTORS.
0.5722
THE CROSS-SECTION ARE OF 10 COPPER CONDUCTOR IS 0.836. THE 10 CONDUCTORS ARE CONTAINED IN A 18-IN RUN OF RMC BETWEEN CABINETS. THE MINIMUM RMC REQUIRED FOR THE 10 CONDUCTORS IS _______ INCHES?
1-1/4
GIVEN: A COMMERCIAL BUILDING WITH A 3 WIRE SINGLE PHASE 120/240 VOLT SERVICE HAS A TOTAL LOAD OF 35000 VA AFTER ALL DEMAND FACTORS HAVE BEEN CONSIDERED THE MINIMUM SIZE THWN COPPER CONDUCTORS REQUIRE FOR THE UNGROUNDED SERVICE CONDUCTORS IS ______ AWG
1/0
FOR A BRANCH CIRCUIT THAT SERVES A SHORT-TIME DUTY, 60 MINUTE-RATED MOTOR THAT HAS A NAMEPLATE CURRENT RATING OF 20 AMPERES AND ALL TERMINAL CONNECTIONS RATED FOR 75 DEGREES C, THE MINIMUM SIZE THWN COPPER CONDUCTOR IS ___ AWG.
10
WHAT IS THE MAXIMUM NUMBER OF COMPACT 1 AWG COPPER CONDUCTORS WITH THHN INSULATION PERMITTED IN 2-INCH RMC
10
GIVE: THE LIGHT LOAD FOR ASSEMBLY HALL WIL AN AREA OF 2,000 SQ. FT. IS SERVED WITH A 120/240-VOLT, SINGLE PHASE PANEL AND NO OTHER ELECTRICAL LOADS ARE SERVED FROM THIS PANEL. THE LIGHTING LOAD IS CONTINUOUS AND THE LOAD IS BALANCED AND AT MINIMUM REQUIRED FOR THE LOAD AS SPECIFIED BY NEC. CALCULATE THE FEEDER NEUTRAL LOAD IN AMPERES
10.4
GIVEN THIS SCENARIO: 36kVA TOTAL POWER, 120/208-VOLT WYE BALANCE LOAD. WHAT IS THE CALCULATED LINE CURRENT FOR A LINE CONDUCTOR SERVING A 3 PHASE LOAD WHICH IS 12kVA PER PHASE (TO THE NEAREST AMPERE)
100
NEON EQUIPMENT SHALL BE INSTALLED IN OR DWELLING OCCUPANCIES IF THE EQUIPMENT HAS AN OPEN CIRCUIT VOLTAGE EXCEEDING
1000 VOLTS
THE DISCONNECTING MEANS FOR A 3 PHASE, 240-VOLT, 3-HP, WOULD ROTOR MOTOR SHALL BE RATED AT A MINIMUM OF _____ AMPERES.
11.0
FOR A 15 AMPERE AC GENERAL-USE SNAP SWITCH WHICH SERVES AS THE CONTROLLER FOR A STATIONARY 2 HP 240 VOLT MOTOR, THE MAXIMUM MOTOR FULL LOAD CURRENT PERMITTED IS ____ AMPERES.
12
ACCORDING TO THE NEC, WHAT WOULD BE THE REQUIRED BURIAL DEPTH OF A DIRECT BURIAL CABLE RUN OF A 15 AMPERE 120-VOLT CIRCUIT THAT IS PROTECTED BY A GFCI IF THE CIRCUIT PASSES DIRECTLY UNDER THE RESIDENTIAL DRIVEWAY?
12 INCHES
ARMORED CABLE (TYPE AC) SHALL SECURED WITHIN HOW MANY INCHES OF EACH OUTLET BOX, JUNCTION BOX, CABINET, OR FITTING?
12 INCHES
UNLESS OTHERWISE PERMITABLE BY LOCAL REGULATIONS, ARMORED CABLE (AC) SHALL BE SECURED WITHIN HOW MANY INCHES OF EVERY BOX, CABINET, OR FITTING AND AT INTERVALS NOT 4.5 FEET WHERE INSTALLED ON OR ACROSS FRAMING MEMBERS?
12 INCHES
GIVEN: A DWELLING UNIT WITH 3000 SQ. FT. OF HABITABLE SPACE AND BATHROOMS, 600 SQ FT OF GARAGE, AND 1000 SQ FT OF UNFINISHED HABITABLE SPACE THAT IS ADAPTABLE FOR FUTURE USE WHEN CALCULATING THE SERVICE-CONDUCTORS SIZE FOR THIS DWELLING UNIT USING THE OPTIONAL CALCULATION METHOD, THE MINIMUM DEMAND IS ___ VOLT-AMPERES
12,600
HOW MANY BRANCH CIRCUITS WILL BE REQUIRED FOR A SIGN WITH CONTINUOUS LOAD OF 30,200 VOLT AMPERES (120 VOLTS), CONSISTING EXCLUSIVELY ELECTRIC DISCHARGE LIGHTING TRANSFORMERS?
13
ON A SINGLE PHASE, 120/240 VOLT GROUNDER SERVICE, IF THE LOAD ON ONE PHASE IS 21,666.6 VA WITH NO LOAD ON THE OTHER PHASE, THE CURRENT IN THE GROUNDED CONDUCTOR IS ___ AMPERES.
180
WHERE A HAND HOLE IS PROVIDED, POLES USED AS RACEWAY FOR SIGN CONDUCTORS AND FOR THE SUPPORT OF SIGNS SHALL HAVE A MINIMUM SIZE HAND HOLE OF
2"X4"
GIVEN: A CONDUIT CONTAINING THREE CURRENT-CARRYING CONDUCTORS OF 500 KCMIL COPPER WITH 75-DEGREE C INSULATION IS INSTALLED 2 IN. ABOVE THE ROOF AND EXPOSED THE SUNLIGHT WITH A BEGINNING AMBIENT TEMPERATURE OF 86 DEGREES F. WHAT IS THE ALLOWABLE AMPACITY OF THE 500 KCMIL CONDUCTORS?
255
GIVE: A CONDUIT CONTAINING THREE CURRENT-CARRYING CONDUCTORS OF 500 KCMIL COPPER WITH 75-DEGREE C INSULATION IS INSTALLED 2 IN. ABOVE THE ROOF AND EXPOSED TO SUNLIGHT WITH A BEGINNING AMBIENT TEMPERATURE OF 86 DEGREES F. WHAT IS THE ALLOWABLE AMPACITY OF THE 500 KCMIL CONDUCTORS
289
IF USED TO CONNECT EQUIPMENT WHERE FLEXIBILITY IS NECESSARY AFTER INSTALLATION, THE COMBINED LENGTH FOR THE 3/4 IN FLEXIBLE METAL CONDUIT WILL REQUIRE ADDITIONAL SUPPORT IF THE RACEWAY EXCEEDS HOW MANY FEET BETWEEN THE LISTED TERMINALS OF THE CONDUIT OR RACEWAY/
3 FEET
THE NEC REQUIRES THAT RIGID POLYVINYL CHLORIDE CONDUIT BE INSTALLED AS A COMPLETE SYSTEM AND FASTENED AND SUPPORTED. THEREFORE, PVC CONDUIT SHALL BE SECURELY FASTENED WITHIN HOW MANY FEET OF EACH OUTLET, JUNCTION, DEVICE, CONDUIT BODY, OR OTHER CONDUIT TERMINATION BOX?
3 FEET
GENERALLY THERMAL INSULATION SHALL BE INSTALLED WITHIN HOW MANY INCHES OF THE RECESSED LUMINAIRE ENCLOSURE, WIRING COMPONENT, OR BALLAST?
3 INCHES
CONDUIT BODIES ENCLOSING 6 AWG CONDUCTORS OR SMALL SHALL HAVE A CROSS-SECTIONAL AREA NOT LESS THAN HOW MANY TIMES LARGER THAN THE CROSS-SECTIONAL AREA OF THE LARGEST CONDUIT OR TUBING TO THE WHICH THEY ARE ATTACHED?
2.OO TIMES LARGER
FLEXIBLE METAL CONDUIT SHALL BE PERMITTED AS A GROUNDING MEANS, IN PART, WHERE THE CIRCUIT CONDUCTORS CONTAINED THERE THEREIN ARE PROTECTED BY OVER-CURRENT DEVICES RATED AT HOW MANY AMPS OR LESS?
20 AMPS
GIVEN: A 3 PHASE, SQUIRREL CAGE RESISTOR-STARTING DESIGN-B, 460-VOLT, 50=HP MOTOR HAS A NAMEPLATE FULL-LOAD AMPERE RATING OF 59 AMPERES. THE OVERCURRENT-PROTECTION DEVICE IS A NON-TIME-DELAY FUSE. THE MAXIMUM BRANCH-CIRCUIT OVERCURRENT (SHORT-CIRCUIT AND GROUND -FAULT) PROTECTION PERMITTED IS ___ AMPERES
200
DIRECT BURIED CABLE THAT IS INSTALLED UNDER AN OPEN FIELD VACANT PROPERTY MUST HAVE A MINIMUM COVER DEPTH OF ___ INCHES WHEN THE SYSTEM VOLTAGES IS 0-600 VOLTS?
24
GIVEN THAT A SIGN IN A PUBLIC PARKING LOT IS FED WITH A 200 A, 120/240 V SERVICE, WHAT WOULD BE THE REQUIRED MINIMUM BURIAL DEPTH OF THE SERVICE IF IT IS INSTALLED WITH RMC?
24 INCHES
GIVEN: A DWELLING WITH A 3-WIRE, A SINGLE-PHASE 120/240-VOLT SERVICE HAS A TOTAL LOAD OF 35000 VA AFTER ALL DEMAND FACTORS HAS BEEN CONSIDERED. THE MINIMUM SIZE THWN ALUMINUM CONDUCTORS REQUIRED FOR THE SERVICE ENTRANCE FOR THIS DWELLING IS ____ AWG
3/0
SHOW POWER FOR MARINAS OR BOATYARDS SHALL BE PROVIDED BY SINGLE RECEPTICLES THAT ARE LOCKING AND GROUNDING TYPE, MOUNTED AT LEAST 12 INCHES ABOVE THE DECK SURFACE, AND RATED AT NOT LESS THAN ______ AMPERES
30
WHAT WOULD BE THE REQUIRED BOX SIZE VOLUME IN CUBIC INCHES TO PROVIDE THE MINIMUM FREE AIR SPACE OF THE BOX WAS TO BE INSTALLED WITH: -SIX #14 AWG THW CONDUCTORS -EIGHT #12 AWG THW CONDUCTORS -THREE #10 AWG THW CONDUCTORS
37.5 CUBIC INCH BOX
TYPE THWWN COPPER CONDUTORS FOR A 120/240 VOLTM SINGLE PHASE SIGN SERVICE RATED AT 100 AMPERES SHALL NOT BE LESS THAN
3AWG
IF TEN 100-WATT LUMINARIES ARE CONNECTED IN PARALLEL AND SUPPLIED BY 240-VOLTS AC, THE TOTAL AMPERES WOULD BE
4.16
GIVE: A 25 UNIT MOBILE HOME PARK HAS A SINGLE-PHASE 120/240-VOLT SERVICE. THE CALCULATED LOAD FOR EACH MOBILE HOME IS 15000 VA. THIS MOBILE HOME PARK MUST HAVE A SERVICE OF AT LEAST ___ AMPERES
400
GIVEN: ON A 480/240 VOLT STEPDOWN TRANSFORMER, THE PRIMARY CURRENT IS 200 AMPERES. IN THE AMPERES THE APROXIMATE SECONDARY CURRENT IS
400
GIVEN: ON A 480/240 VOLT STEPDOWN TRANSFORMER, THE PRIMARY CURRENT IS 200 AMPERES. THE APPROXIMATE SECONDARY CURRENT IS ______________ AMPERES.
400
GIVEN:IN A MOBILE HOME PARK, THE COMPUTED LOAD FOR EACH MOBILE HOME IS 15000 VA AND THE PARK WILL HAVE TWENTY FIVE MOBILE HOMES. THE SERVICE WILL HAVE A SINGLE MAIN 120/240 VOLT SERVICE. THE ELECTRICAL SERVICE REQUIRED FOR THIS MOBILE HOME PARK SHALL BE AT LEAST _______ AMPERES
400
PORTABLE OR MOBILE SIGNS IN WET OR DAMP LOCATIONS SHALL BE PROVIDED WITH FACTORY INSTALLED
GFCI PROTECTION FOR PERSONNEL
HOW MANY GROUNDED CONDUCTORS CAN BE TERMINATED UNDER AN INDIVIDUAL TERMINAL WITHIN A SWITHBOARD, SWITCHGEAR, OR PANELBOARD IF THE EQUIPMENT OPERATES UNDER 1000 VOLTS?
ONE
READILY ACCESSIBLE IS DEFINED AS A CAPABLE OF BEING REACHED QUICKLY FOR
OPERATION, RENEWAL, OR INSPECTIONS, WITHOUT REQUIRING THOSE TO WHOM READY ACCESS IS REQUISITE TO CLIMB OVER OR REMOVE OBSTACLES OR RESORT TO PORTABLE LADDERS
TO BE CONSIDERED AN ACCEPTABLE SIGN DISCONNECT LOCKING MEANS, WHAT NEEDS TO REMAIN IN PLACE AT HE LOCATION IN WHICH THE DISCONNECT IS INSTALLED?
PROVISION FOR ADDING A LOC
WHERE A RECEPTACLE PENETRATES A BUILDING, A LISTED CAP SHALL BE USED TO CLOSE THE OPENING BETWEEN NEON TUBING AND THE
RECEPTACLE
