NCCER Electrical Test Questions with Correct Answers Guaranteed 100% Pass _____ conduit is too thin to be threaded. - Answer EMT ??? are intended for the electrical protection of personnel. - Answer GFCIS 208. A heat trace cable is installed on a line that will be insulated, when should it be megged? - Answer Before and after the insulation is put on 4 inch square boxes are available with all of the following depths EXCEPT - Answer 1 inch A "megger" will be used to check a cable. The electrician MUST be sure thát the circuit is - Answer De-energized and locked, tagged out, and tested A 1 line diagram with simplified symbols indicates the - Answer Interconnections and component parts of an electrical circuit A 10 -inch offset at 30 degrees is being made. What is the distance between center -to-center bends? - Answer 20 inches A 120/208 volt feeder consists of an 800 ft run of 500 kcmil aluminum wire in conduit. This feeder has 5% voltage drop. What will the phase -to-phase voltage be at the load end? - Answer 197.60 volts A 3 way switch, is what typeof switch/ - Answer SPDT A 3-phase, 4 -wire, 480v service requires ______ current transformer(s) - Answer 3 A box has two 12/2 with ground cables in it, all like -colored wires have been spliced and "pigtail", how many #12 conductors should be counted in the box fill? - Answer 5 A brass -colored terminal on a receptacle indicates that it should be used to connect what type of wire? - Answer Hot wire A cable rated for 5KV insulation can safely carry what MAXIMUM voltage? - Answer 5,000 volts A conduit bending Hickey can be used to bend conduit from? - Answer 0-15 degrees A DC ammeter is connected? - Answer In series with the circuit A device labeled CO/ALR can be used with ______ wire. - Answer Aluminum, copper, or copper -
clad aluminum A drawing showing a point A to point B hookup of conductors is called a - Answer Wiring diagram A dropout plate is best described as a. - Answer Plate with a curved surface for cable to follow as it passes from the tray A good electrical connection should - Answer Be mechanically and electrically secure A grounding electrode conductor must be connected _____ of a main distribution panel. - Answer To the neutral terminal bus A heat trace cable is installed on a line that will be insulated. When will the cable be "megged"? - Answer Before and after the insulation is put on the line A holding contact in a motor starter normally connected in parallel with? - Answer The start push button A holding contact na motor starter is normally connected in parallel with the - Answer Start push button A quick test that can be made to determine if an installation is good is known as a(n) _ test. - Answer Go/No Go A section of a cable tray that makes 2 vertical 90 degree turns is known as? - Answer A vertical "T" A sectional drawing is a? - Answer Cutaway view of a building or object A switch labeled "AL -CU" can be used with what type of wire? - Answer Aluminum Copper or Copper Clad Aluminum 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: - Answer 90Volts A transformer has a turn ratio of 5:1, what will be the voltage on the secondary if primary voltage is 120v? - Answer 24 volts A transformer with 100 turns in its primary coil and 10 turns in its secondary coil is a_ transformer. - Answer Step -down A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ - Answer Step -down turns ratio of 4:3 A Type ?? conduit body has a threaded straight hub on each end and another threaded hub perpendicular to these two. - Answer T A voltage of 1 volt applied across a resistance of 1 ohm produces a current of 1 amp. If the voltage is doubled and the resistance is halved, then the current - Answer Increases 4 times A voltmeter is connected in. - Answer Parallel with the circuit A VOM measures - Answer Ohms, amps, and volts A(n). ______ operates on the same principle as a current transformer. - Answer Clamp -on ammeter According to Ohm's Law, the amount of current in a circuit is equal to the - Answer Voltage divided by the resistance After a hazard review is completed, ________ determine(s) the classification of a confined space as a nonpermit or permit -required confined space - Answer The supervisor and project/safety managers All of the following apply to the installation of junction boxes, splices boxes, and pull boxes except that they must be? - Answer Metal All of the following are common service voltages in the United States EXCEPT: - Answer 372/575 3-PHASE, 4 -WIRE All of the following are found on an elevation view of a motor control center, EXCEPT - Answer LOCATION OF MOTOR All of the following are standard fuse size EXCEPT? - Answer 550 or 601 All of the following are standard fuse sizes EXCEPT - Answer 550 AMP All of the following connectors may be used for splicing high voltage cable EXCEPT? - Answer Split -bolt connectors All of the following information is found on a one -line diagram of a substation EXCEPT? - Answer The Scale All of the following rating appear on a circuit breaker nameplate, except - Answer Rated wattage All parts of metal cable tray must be bonded together and? - Answer Grounded All the following are protective devices for motors EXCEPT - Answer SOLENOID All things considered, the most ideal conductor is? - Answer Сopper An analog voltmeter is being connected to a 24 V DC circuit. Polarity is reversed. What reading will occur? - Answer O or fewer volts An angle or U -pull is made with 14 wire or larger. The distance between each raceway entry inside the box and the any less than how many times the trade opposite wall of the box shall NOT be diameter of the largest raceway? - Answer 6 times An electrical fitting can be made explosion proof in which of the following ways - Answer Using an amorphous sealed device As the temperature surrounding a self -regulating heating cable rises, the ____ - Answer Resistance of the polymeric core increases Before a splice or connection can be made to a Type THHN conductor, the ______ - Answer Conductor ends must be stripped and cleaned
clad aluminum A drawing showing a point A to point B hookup of conductors is called a - Answer Wiring diagram A dropout plate is best described as a. - Answer Plate with a curved surface for cable to follow as it passes from the tray A good electrical connection should - Answer Be mechanically and electrically secure A grounding electrode conductor must be connected _____ of a main distribution panel. - Answer To the neutral terminal bus A heat trace cable is installed on a line that will be insulated. When will the cable be "megged"? - Answer Before and after the insulation is put on the line A holding contact in a motor starter normally connected in parallel with? - Answer The start push button A holding contact na motor starter is normally connected in parallel with the - Answer Start push button A quick test that can be made to determine if an installation is good is known as a(n) _ test. - Answer Go/No Go A section of a cable tray that makes 2 vertical 90 degree turns is known as? - Answer A vertical "T" A sectional drawing is a? - Answer Cutaway view of a building or object A switch labeled "AL -CU" can be used with what type of wire? - Answer Aluminum Copper or Copper Clad Aluminum 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: - Answer 90Volts A transformer has a turn ratio of 5:1, what will be the voltage on the secondary if primary voltage is 120v? - Answer 24 volts A transformer with 100 turns in its primary coil and 10 turns in its secondary coil is a_ transformer. - Answer Step -down A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ - Answer Step -down turns ratio of 4:3 A Type ?? conduit body has a threaded straight hub on each end and another threaded hub perpendicular to these two. - Answer T A voltage of 1 volt applied across a resistance of 1 ohm produces a current of 1 amp. If the voltage is doubled and the resistance is halved, then the current - Answer Increases 4 times A voltmeter is connected in. - Answer Parallel with the circuit A VOM measures - Answer Ohms, amps, and volts A(n). ______ operates on the same principle as a current transformer. - Answer Clamp -on ammeter According to Ohm's Law, the amount of current in a circuit is equal to the - Answer Voltage divided by the resistance After a hazard review is completed, ________ determine(s) the classification of a confined space as a nonpermit or permit -required confined space - Answer The supervisor and project/safety managers All of the following apply to the installation of junction boxes, splices boxes, and pull boxes except that they must be? - Answer Metal All of the following are common service voltages in the United States EXCEPT: - Answer 372/575 3-PHASE, 4 -WIRE All of the following are found on an elevation view of a motor control center, EXCEPT - Answer LOCATION OF MOTOR All of the following are standard fuse size EXCEPT? - Answer 550 or 601 All of the following are standard fuse sizes EXCEPT - Answer 550 AMP All of the following connectors may be used for splicing high voltage cable EXCEPT? - Answer Split -bolt connectors All of the following information is found on a one -line diagram of a substation EXCEPT? - Answer The Scale All of the following rating appear on a circuit breaker nameplate, except - Answer Rated wattage All parts of metal cable tray must be bonded together and? - Answer Grounded All the following are protective devices for motors EXCEPT - Answer SOLENOID All things considered, the most ideal conductor is? - Answer Сopper An analog voltmeter is being connected to a 24 V DC circuit. Polarity is reversed. What reading will occur? - Answer O or fewer volts An angle or U -pull is made with 14 wire or larger. The distance between each raceway entry inside the box and the any less than how many times the trade opposite wall of the box shall NOT be diameter of the largest raceway? - Answer 6 times An electrical fitting can be made explosion proof in which of the following ways - Answer Using an amorphous sealed device As the temperature surrounding a self -regulating heating cable rises, the ____ - Answer Resistance of the polymeric core increases Before a splice or connection can be made to a Type THHN conductor, the ______ - Answer Conductor ends must be stripped and cleaned
