Electrician NCCER Questions and Answers Already Passed

Electrician NCCER Questions and Answers Already Passed 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 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