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NCCER ELECTRICAL CERTIFICATION TEST 2
2025|ACTUAL 300 QUESTIONS AND
ANSWERS|ALREADY GRADED A+|100% VERIFIED
What type of NEMA class enclosure is approved for general purpose indoor use and is NOT dust-tight or drip-proof? Types 1 If a voltage source of a circuit provides 240 volts and there are 5 ohms of resistance, how much current is in the circuit? 40 amps An analog voltmeter is being connected to a 24 V DC circuit. Polarity is reversed. What reading will occur? O or fewer volts How should power cable and signal cable be placed in the same cable tray? Place a divider between the signal cables and the power cable What are the 2 MOST commonly used methods of terminating grounding? Exothermic (Cadwelding) and mechanical
Copper is the most widely used conductor because it. Offers low resistance and is easy to use The force that causes electrons to flow is most commonly called Voltage A dropout plate is best described as a. Plate with a curved surface for cable to follow as it passes from the tray The 2 basic cable tray failures under load are _____ failures. Side rail and rung 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 Increases 4 times The NEC requires that switch, receptacle, and fixture boxes be _with the finished face of the wall surface when combustible material, such as ply- wood or paneling, is being used Mounted flush
During an aluminum to copper connection What should be used on every wire pull through conduit? Wire lube Given: the distance between a starter and a 3-phase motor is 73 ft. the started MUST have a Sft tail and the motor a 3ft tail. How much multi-conductor wire is REQUIRED for a pull from the starter to the motor? 81ft What type of circuit breaker was developed to meet the needs of systems where high potential fault-currents are present? Current-limiting Where are the overload heaters normally located in a motor circuit? In the motor starter between the "T" leads and the contactors A heat trace cable is installed on a line that will be insulated. When will the cable be "megged"? Before and after the insulation is put on the line
Voltage has been stepped-down in a transformer. What happens to the current in the secondary It decreases A VOM measures Ohms, amps, and volts The standard unit for measuring the cross-sectional area of wire is the CIRCULAR MIL ??? are intended for the electrical protection of personnel. GFCIS If a circuit has 10 amps of current and 12 ohms of resistance, the applied voltage is 120
That there is a potential difference between 2 points What does a watt meter indicate? True power When transporting metal conduit, it is important to Protect the threads keep the caps on to prevent thread damage The voltage drop of conductors carrying AC in PVC conduit will have what relation to that of identical conductors in the conduit The same Which of the following is the "heating element" in a self- regulating heat trace? Semiconducting core Intermediate metal conduit (IMC) is a type of conduit that Has a wall thickness less than that of rigid metal conduit but thicker than EMT
According to Ohm's Law, the amount of current in a circuit is equal to the Voltage divided by the resistance The voltage of a DC circuit to be measured. How should the meter be connected to ensure proper polarity? The (-)with the (-) and the (+) with the (+) Electrical metallic tubing must be supported with what maximum distance from each junction or outlet box? 3ft What type of wire is standard for low-voltage milliamp signal system? Single pair shielded A 3 way switch, is what typeof switch/ SPDT The number of complete AC cycles per second is called? Frequency
Cable markings show all of the following, EXCEPT AMPACITY The drawing scale is most likely to be found in which of the following drawing location? The drawing title block What item is used to make a 90 degree bend when pulling wire in cable tray? Cable roller The first step in making an exothermic (cadweld) connections is? To prepare the cable, mold, and welding material In a sine wave, the number of times per second an identical pattern itself is known as? Frequency of a waveform What is the voltage ratio for dual-voltage motors?
2 to 1 The value indicated on a meter for an AC circuit are defined as root-mean- square, what is another term for this? Effective Value What does frame size provide information about? Proper bolt-up All parts of metal cable tray must be bonded together and? Grounded Which of the following describes the grounding of metal parts that do not carry current in a distribution system? Equipment grounding Which of the following statements is true about cadweld molds is true? Cadweld molds are sized to fit the cable that is being welded
The terminations on a motor starter are tightended incorrectly, what may happen? It will create an ARC and increase the amperage the motor is pulling A section of a cable tray that makes 2 vertical 90 degree turns is known as? A vertical "T" What should be done to change the rotation of a 3-phase motor? Swap any two leads What is the typical voltage of a control transformer for 3-phase, 480 volt starter 110 volts Which of the following determines the pulling force applied to the cable when using a tugger? The number of wraps on the tugger drum
What is the maximum allowance fill when installing 3 or more conductors in a conduit? 40% Which of the following conductors has the least resistance? 1/0 awg All things considered, the most ideal conductor is? Сopper All of the following apply to the installation of junction boxes, splices boxes, and pull boxes except that they must be? Metal 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? 5 Which of the following abbreviations describe the inturrpting capacity of a circuit breakers of fuses?
What is the term for a transformer whose primary and secondary circuit have part of a winding in common? The 2 circuit are not isolated from each other. Auto transformer All of the following rating appear on a circuit breaker nameplate, except Rated wattage The trip rating of a circuit breaker used in the main proctective device in a panelboard cannot exceed? The total amp of the branch breakers A transformer has a turn ratio of 5:1, what will be the voltage on the secondary if primary voltage is 120v? 24 volts Which of the following types are raceways is approved for use in class 1 division 1 hazardous location? Rigid metal conduit
Which of the following would be found in a class 1 location? Three threads on conduit connections The drawing scale is (most) likely to be found in which of the following drawing location? The drawing title block To slightly change elevation of a cable tray Swivel plates Heat trace cable should never cross itself except? when cable is temperature self limited When climbing a scaffold you need? Yo yo When you double resistance and amperage, what happens to the current? Its stays the same
How are primary leads identified in a transformer? H1, H2, H The leads on a type K thermalcouple are? Yellow and Red What does thermal overload protect in a starter or MCC? Motors What is the (minimum) headroom at service equipment? 6ft 6in. or 7ft What types of conduit can be safely used in a corrosive environment? Galvanized steel and plastic-coated What color identifies an insulated, grounded, number, 4 conductor? White/green
All of the following are standard fuse size EXCEPT? 550 or 601 What type of circuit breaker was developed to meet the needs of modern power system where high pontential fault-current are present? Current-limiting breakers Where are the overload heaters normally located in a motor circuit? In the motor starter between the "T" leads and contactor
- A heat trace cable is installed on a line that will be insulated, when should it be megged? Before and after the insulation is put on What instrument is used to measure current? Ammeter
