Electrician NCCER, Exam Questions and Answers, Latest Updated 2024/2025 | Graded.

Which article of the NEC covers grounding? Article 250 What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3- Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automatically blow fuses eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a 200-whatt lamp what is the total connected load? 13.3 Amps Electrician NCCER Questions and Answers (Already Passed) Latest Updated 2024/2025 | Graded. The __________must be grounded in a bussed glutter if use as the main service equipmemt Neutral busbar When wall mounting cable tray, ensure that The building structure is strong enough to support the tray system The purpose of sealing cable ends when reels of cable are in storage is ______________ to keep moisture from creeping in The outer covering on liquid-tight flexible metal conduit is use for A moisture seal A good electrical connection should Be mechanically and electrically secure The symbol normally use for duplex Circle with two parallel lines draw through it Disconnecting means are covered in NEC section 110-22 In relation to switches, the term throw refers to the Number of internal operations that switch can perform A 3-phase, 4-wire, 480v service requires ________ current transformers 3 Services conductors and equipment are covered in NEC Article 230 The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits be__________ receptacles Grounding The circular mil is based on the Cross-sectional area of the wire A transformer with the primary of 400 turns and a secondary of 300 turns has a Step down turns ratio of 4:3 Of the termination classes listed below,_____ is the only one that provides a seal against external elements Class 1 Unless otherwise noted, the calculations in AC circuits ______ values Rms When the coil turns increased the ________ Induced voltage is increased As the temperature surrounding a self regulating heating cable rises, the ________ Resistance of the polymeric core increases The motor type that has the highest starting torque is the _________ motor Capacitor - start For a given number of poles, the________ determines the speed of an AC Motor. Frequency Both induction and synchronous motor operate on the principle of the rotating________field Magnetic A Transformer has 200 turns in the primary, 150 turns in the secondary, and 120VAC applied to the primary. The voltage across the secondary is 90 Volts The output capacity of a motor is rated in Horsepower The synchronous speed at witcha 4 pole, 60 Hz induction motor operates is ________ rpm 1800 The sine of 0 degree is 0 In a AC circuit containing resistance only, _______ 12A will flow if the resistance is 10 ohms and the voltage is 120V 12A The _____ rotor types are generally rugged Squirrel cage The componente labeled 7 in figure 1 is a (an) End seal Meters used in AC circuits indicate the_______ Effective Proofs tests are made at________ oF the original factory voltage 60% Which type of heating cable can not be cut and terminated in the field? Mineral insulated The secondary of a CT under load should not be opened because of______ Induced hight voltage In a transformer,______ Electromagnetic induction occurs When a ground rod is installed, the top of the rod must be positioned _____.grade Flush with or below When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will have a ________ Crooked bend All of the following types of condulet may be used as a pulling point for conduit that requires a 90 degree change in direction, except_______ C To be effective, a grounding system must limit the voltage on the electrical system and protect it from all of the following, except ______ Undervoltage conditions What is the most common service use in a temporary power panel? 120/240 volt, 1-phase, 3- wire What are the 2 most common types of overcurrent protective devices? Circuit breakers and fuses What instrument is use to perform an insulation resistance test on a 480 volt motor winding? Megohmmeter What is a seal installed in a run of conduit in a class I location? Prevent the passage of explosive gases in the conduit Which of the following is the correct formula for OHM's law? I=E/R Which of the following testing instruments operated on the current transformer principle Clamp-on ammeter A drowning showing a point A to point B hookup of conductors is called a Wiring diagram What does HOA usually mean in a motor control circuit Hands of automatic A120/208 Volt feeder consist of an 800 ft run of 500 kcmil aluminum wire in conduit. This feeder has 5% voltage drop. What will the phase-toPhase voltage be at the load end 197.60 volts What is voltage? electromotive force What is the standard wire size system used in the United States? AWG A switch labeled "AL-CU" can be use with what type of wire? Aluminum Copper and copper clad aluminum What type of conduit fitting is usually placed in the middle of a long run of rigid metal conduit to provide access for pulling wire C What is the largest size of aluminum rigid conduit couplings? 6" What is the purpose of the thermocouple? To measure temperature A brass-colored terminal on a receptacle indicates that it should be used to connect what type of wire? Hot wite What is the standard length of rigid conduit? 10 FT An angle or U-pull is made with 14 wire or larger. The distance between each raceway entry inside the box and the opposite wall of the box shall not be any less than how many times the trade diameter of the largest raceway? 6 times Where should a stress cone be used? High voltage termination A cable rated for 5kv insulation can safely carry what maximum voltage? 5000 volts Which of the following statements Describes the operating features of a thermal overload relay? The greater the overload, the shorter the time of tripping EMAIL ME: For help with report, Assignment, Essay and thesis writing. What is the primary consideration in selecting the proper rope for a cable pull? Safety Why can a lead acid battery be an explosive hazard? Hydrogen gas is produced during charge and discharge What is the largest size conductor that can terminate on a 20 amp receptacle 12 awg Normally, the easiest place to reverse the leads to change the direction of rotation of a 3-phase motor is at the Motor starter What maximum number of bends is allowed between fittings in one conduit run? 4 quarter bends or 360 degrees What size wire is standard for a 120-volt motor control systems? #14 In all cases where live parts are normally exposed on the front of switchboards or motor control centers the working space in front of such equipment must be what minimum length? 3 FT What is the interrupting rating of a fuse The maximum value off current that the fuse is designed to interrupt. What is the symbol for the primary side of a transformer? H An electrical fitting can be made explosion proof in which of the following ways? Using an amorphous sealed device A megger will be used to check a cable. The electrician must be sure that the circuit is Deenergized and locked, tagged out, and tested What is the function of a ballast on a fluorescent fixture ? Steps up the voltage What is the primary purpose of P&ID Provide scale drawings and piping and instrumentation control systems. Which of the following factors is used to control the speed of an induction motor? Frequency A 10-inch offset at 30 degrees is been made. What is the distance between center-to-center bends? 20 inches What is an acceptable protection techniques for electrical equipment in hazardous location? Use duct-ignition proof equipment What is the purpose of lockout/Tagout? Prevent operation What test or equipment can be use to locate suspected short circuit in 1 phase of a 3 phase motor? Megger A 1 line diagram with simplified symbols indicates the Interconnections and component parts of an electrical circuit What will happen if moisture is inside a cad-weld mold while the weld is being performed? The cadwel mold could explode What is produced in a conduit run by making 2 equal bends in opposite direction? Offset Cable trays are usually supported by all of the following means except? #9 wire 4-inch square boxes are available with all of the following depths except? 1 inch What is installed at a expansion joint to provide a continuous ground between 2 sections of cable tray? A bonding jumper What color identifies and insulated, grounded, number 4 conductors? Green What is it important to torque bolts when busbars are connected? Decrease resistance on the connection All of the following are protective devices for motors except Solenoid