Electrical Nccer Study Set In-class activity

Electrical Nccer Study Set In-class activity article 250 - Which article of the NEC covers grounding? Gual - Which of the following is a 90 degree, explosion proof fitting? Dropout plate - What is a Metal plate with a curved surface for cable to follow as it passes from the tray? 372/575 3-phase, 4-wire - Are not common service voltages in the United States GFCI breaker - Opens a circuit to prevent operation of an electrical device The motor will automatically blow fuses - What will happen when one or more coils in a winding are grounded ? 13.3 amps - Eight incandescent lighting fixtures are to be installed . Each fixture is 120 volts, with a 200-watt lamp. What is the total connected load? Neutral busbar - The ——- must be grounded in a bussed gutter if used as the main service equipment. Strong enough to support the tray system - When wall mounting cable tray, ensure that the building structure is ? Keep moisture from creeping in - The purpose of sealing cable ends when reels of cable are in storage is to A moisture seal - The outer covering on liquid-tight flexible metal conduit is used for Mechanically and electrically secure - A good electrical connection should be A circle with two parallel lines drawn through it - The symbol normally used for duplex NEC section 110-22 - Disconnecting means are covered in? Number of internal operations that a switch can preform - In relation to switches the term throw refers to 3 - A 3-phase, 4-wire, 480v service requires_______ current transformers. NEC article 230 - Services conductors and equipment are covered in Grounding - The NEC requires that all receptacles installed on 25 Cross-sectional area of the wite - The circular mil is based on the _______. Cross-sectional area of the wire - The circular mil is based on the _______? Step down turn ratio of 4:3 - A transformer with the primary of 400 turns and a secondary of 300 turns has a? Class 1 - Of the termination classes listed below,______ is the only one that provides a seal against external elements RMS (Root Mean Square) - Unless other wise noted, the calculations in AC circuits______ values. Induced voltage is increased - When the coil turns are increased the ___________. Resistance of the polymeric core increases - As the temperature surrounding a self-regulating heating cable rises, the _________ Capacitor-start - The motor type that has the highest starting torque is the _______ motor. frequancy - For a given number of poles, the _______ determines the speed of an ac motor. Magnetic - Both induction and synchronous motors operate on the principle of a rotating________ field. 90 volts - A transformer has 200 turns in the primary, 150 turns in the secondary and a 120VAC applied to the primary. The voltage across the secondary is? Horse power - The output capacity of a motor is rated in? 1800 - The synchronous speed at which a 4 pole, 60 Hz induction motor operates is ______ rpm. 0 - The sine of 0 degrees is ? 12 amps - In Ana AC circuit containing resistance only,_______ will flow if the resistance is 10 ohms and the voltage is 120v Squirrel cage - The_____ rotor types are generally rugged. effectivness - Meters used in AC circuits indicate the _______. 60% - Proofs tests are made at ________ of the original factory voltage. Mineral insulated - Which type of heating cable cannot be cut and terminated in the field? Induce high voltage - The secondary of a CT under load should not be a opened because of? Electromagnetic induction occurs - In a transformer,_______. Flush with or below - When a ground rod is installed, the top of the rod must be positioned ________ grade. Crooked bend - When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will have a _____. undervoltage conditions - To be effective, a grounding system must limit the voltage on the electrical system and protect it from all of the following, except______ 120/240 volt, 1-phase, 3 wire - What is the most common service used in temporary power panel? Circuit breakers and fuses - What are the 2 most common types of over current protective devices? Megohmmeter - What instrument is used to perform an insulation-resistance test on a 480-volt motor winding? Prevent the passage of explosive gases in the conduit - Why is a seal installed in a run of conduit in a class 1 location? Clamp on ammeter - Testing instrument operated on the current transformer principle? Wiring diagram - A drawing showing a point A to point B hookup of conductors is called a? Hands off automatic - What does HOA usually mean in a motor control circuit?