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An advantage of an electromagnent over a permanent magnent is that ____. - ANSWERAn electromagnent can be switched on and off. An excellent diffuser surface is one that ____. - ANSWERScatters light uniformly in all directions. Light is converted into electricity ____. - ANSWERIn a photovoltaic...
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Add to cartAn advantage of an electromagnent over a permanent magnent is that ____. - ANSWERAn electromagnent can be switched on and off. An excellent diffuser surface is one that ____. - ANSWERScatters light uniformly in all directions. Light is converted into electricity ____. - ANSWERIn a photovoltaic...
Locknuts are sometimes used in making electrical connections on studs. In there cases the purpose of the locknuts is to ____. - ANSWERPrevent the connection from lossening under vibrations. Enclosed means, surrounded by a ____ which will prevent persons from accidently contacting energized parts....
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Add to cartLocknuts are sometimes used in making electrical connections on studs. In there cases the purpose of the locknuts is to ____. - ANSWERPrevent the connection from lossening under vibrations. Enclosed means, surrounded by a ____ which will prevent persons from accidently contacting energized parts....
Resistance with 2 resistors - ANSWER(R1+R2)/(R1xR2) Resistance with more than 2 resistors - ANSWER1/{(1/r1)+(1/r2)+(1/r3)} voltage drop single phase - ANSWER(2 x conductor length x I x kRating)/cmils voltage drop 3 phase - ANSWER(1.732 x conductor length x I x kRating)/cmils K rating of ...
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Add to cartResistance with 2 resistors - ANSWER(R1+R2)/(R1xR2) Resistance with more than 2 resistors - ANSWER1/{(1/r1)+(1/r2)+(1/r3)} voltage drop single phase - ANSWER(2 x conductor length x I x kRating)/cmils voltage drop 3 phase - ANSWER(1.732 x conductor length x I x kRating)/cmils K rating of ...
National Electrical Code metric units of measurement are provided in accordance with which system standard? Select one - ANSWER The horsepower rating of a controller should be which of the following? - ANSWER Which factor would increase the inductance in an AC circuit if all other factors wer...
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Add to cartNational Electrical Code metric units of measurement are provided in accordance with which system standard? Select one - ANSWER The horsepower rating of a controller should be which of the following? - ANSWER Which factor would increase the inductance in an AC circuit if all other factors wer...
Conductors with _____ marked on the insulation are NOT approved for use in a wet location. - ANSWERTHHN conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insulation are recognized for use in dry and wet locations. Given:...
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Add to cartConductors with _____ marked on the insulation are NOT approved for use in a wet location. - ANSWERTHHN conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insulation are recognized for use in dry and wet locations. Given:...
1. Frequency is measured in which of the fol lowing : A. Voltage Watts C. Hertz D. None of the above - ANSWERc 2. For electroplating power , which of the fol lowing generators should be used : A. Separately excited B. Delta system C. Split phase D. None of the above - ANSWERa 3...
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Add to cart1. Frequency is measured in which of the fol lowing : A. Voltage Watts C. Hertz D. None of the above - ANSWERc 2. For electroplating power , which of the fol lowing generators should be used : A. Separately excited B. Delta system C. Split phase D. None of the above - ANSWERa 3...
Unused openings in equipment shall be closed To afford protection equivalent to the wall of the equipment With flame resistant tape With metallic or non metallic materials .004 inches in thickness With metal 1/8 inch in thickness - ANSWERTo afford protection equivalent to the wall of the equ...
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Add to cartUnused openings in equipment shall be closed To afford protection equivalent to the wall of the equipment With flame resistant tape With metallic or non metallic materials .004 inches in thickness With metal 1/8 inch in thickness - ANSWERTo afford protection equivalent to the wall of the equ...
1. What must be the middle conductor in a single - phase , three - wire electrical system : a . Ungrounded b Grounded c . Hot d . Out - of - phase . - ANSWERB 2. Three - wire , single phase electrical systems require 120 volts between the ungrounded conductor and the neutral . Which volta...
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Add to cart1. What must be the middle conductor in a single - phase , three - wire electrical system : a . Ungrounded b Grounded c . Hot d . Out - of - phase . - ANSWERB 2. Three - wire , single phase electrical systems require 120 volts between the ungrounded conductor and the neutral . Which volta...
A series circuit with a voltage drop of 120 volts has a current of 24 amperes and two resistors in series. The first resistor has a resistance of 3 Ohms. What is the resistance in the second resistor? - ANSWER2 Ohms A transformer has a primary coil with 12 turns and a secondary coil with 4 turns....
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Add to cartA series circuit with a voltage drop of 120 volts has a current of 24 amperes and two resistors in series. The first resistor has a resistance of 3 Ohms. What is the resistance in the second resistor? - ANSWER2 Ohms A transformer has a primary coil with 12 turns and a secondary coil with 4 turns....
1. Which of the following do three 150 volt parallel circuits produce the total current ? a . 50 volts b . 150 volts c . 225 volts d . 450 volts - ANSWERd 3. If a custodian in your building finds out that an office worker is using a hot plate on a circuit that already has a lot of applian...
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Add to cart1. Which of the following do three 150 volt parallel circuits produce the total current ? a . 50 volts b . 150 volts c . 225 volts d . 450 volts - ANSWERd 3. If a custodian in your building finds out that an office worker is using a hot plate on a circuit that already has a lot of applian...
An electromagnet can be switched on and off - ANSWERAnd advantage of an electromagnet over a permanent magnet is Scatters light uniformly in all directions - ANSWERAn excellent diffuser surface is one that In a photovoltaic cell - ANSWERLight is converted into electricity Armature - ANSWERT...
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Add to cartAn electromagnet can be switched on and off - ANSWERAnd advantage of an electromagnet over a permanent magnet is Scatters light uniformly in all directions - ANSWERAn excellent diffuser surface is one that In a photovoltaic cell - ANSWERLight is converted into electricity Armature - ANSWERT...
when an electrical circuit tested with ohm meter, a short circuit is indicated by a reading of... - ANSWER0 voltage drop formula - Single phase - ANSWER2 * K-factor * Amp * Length / Circular mils or KCmils of the conductor used voltage drop formula - 3-phase - ANSWER1.732 * K-factor * Amp * Le...
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Add to cartwhen an electrical circuit tested with ohm meter, a short circuit is indicated by a reading of... - ANSWER0 voltage drop formula - Single phase - ANSWER2 * K-factor * Amp * Length / Circular mils or KCmils of the conductor used voltage drop formula - 3-phase - ANSWER1.732 * K-factor * Amp * Le...
Where the outer sheath of Type MI cable is made of steel _____________. A. it shall provide an adequate path to serve as an equipment grounding conductor B. a separate equipment grounding conductor shall be provided C. the grounding and grounded conductors shall be connected together D. ...
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Add to cartWhere the outer sheath of Type MI cable is made of steel _____________. A. it shall provide an adequate path to serve as an equipment grounding conductor B. a separate equipment grounding conductor shall be provided C. the grounding and grounded conductors shall be connected together D. ...
Where a water pipe passes over an indoor motor control center, leak protection apparatus shall have a MINIMUM clearance of _____. a) 6 feet to the protection apparatus b) 6 feet to the water pipe c) 6 1⁄2 feet to the protection apparatus d) 6 1⁄2 feet to the water pipe - ANSWERA: 6 feet to...
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Add to cartWhere a water pipe passes over an indoor motor control center, leak protection apparatus shall have a MINIMUM clearance of _____. a) 6 feet to the protection apparatus b) 6 feet to the water pipe c) 6 1⁄2 feet to the protection apparatus d) 6 1⁄2 feet to the water pipe - ANSWERA: 6 feet to...
Rod-type grounding electrodes of stainless steel shall have a diameter of no less than which of the following? a) 3/8 inch b) 1/2 inch c) 5/8 inch d 3/4 inch - ANSWERc) 5/8 inch Information technology equipment shall be permitted to be connected to a branch circuit by a power-supply cord wi...
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Add to cartRod-type grounding electrodes of stainless steel shall have a diameter of no less than which of the following? a) 3/8 inch b) 1/2 inch c) 5/8 inch d 3/4 inch - ANSWERc) 5/8 inch Information technology equipment shall be permitted to be connected to a branch circuit by a power-supply cord wi...
And advantage of an electromagnet over a permanent magnet is - ANSWERAn electromagnet can be switched on and off An excellent diffuser surface is one that - ANSWERScatters light uniformly in all directions Light is converted into electricity - ANSWERIn a photovoltaic cell The rotating part ...
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Add to cartAnd advantage of an electromagnet over a permanent magnet is - ANSWERAn electromagnet can be switched on and off An excellent diffuser surface is one that - ANSWERScatters light uniformly in all directions Light is converted into electricity - ANSWERIn a photovoltaic cell The rotating part ...
There are six conductors in a raceway connected to 75° rated breakers. Each wire has a 70-amp load using THHN conductors. The minimum size conductor used are #__________ AWG. a. 4 b. 6 c. 8 d. 10 - ANSWERa Thermal insulation shall not be installed within __________ inch(es) of recessed fixt...
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Add to cartThere are six conductors in a raceway connected to 75° rated breakers. Each wire has a 70-amp load using THHN conductors. The minimum size conductor used are #__________ AWG. a. 4 b. 6 c. 8 d. 10 - ANSWERa Thermal insulation shall not be installed within __________ inch(es) of recessed fixt...
Electrical Generator works on the principle of: - ANSWERFlemings Right hand rule Which of the following quantity is the same in a series electrical circuit: - ANSWERElectrical current The transformer oil used in transformers acts as: - ANSWERBoth insulating material and coolant Induction mo...
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Add to cartElectrical Generator works on the principle of: - ANSWERFlemings Right hand rule Which of the following quantity is the same in a series electrical circuit: - ANSWERElectrical current The transformer oil used in transformers acts as: - ANSWERBoth insulating material and coolant Induction mo...
_______ can be generated. I. Electricity II. Electrical Energy a. I only b. II only c. both I and II d. neither I nor II - ANSWERAns. b A phenomenon where a circuit stores electrical energy is called ______. a. Inductance b. Capacitance c. Resistance d. Susceptance - ANSWERAns. b A g...
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Add to cart_______ can be generated. I. Electricity II. Electrical Energy a. I only b. II only c. both I and II d. neither I nor II - ANSWERAns. b A phenomenon where a circuit stores electrical energy is called ______. a. Inductance b. Capacitance c. Resistance d. Susceptance - ANSWERAns. b A g...
A fixed light will be allowed to be 30 amp provided the socket is rated ____ duty. a. Light b. Medium c. Heavy d. Extra Heavy - ANSWERc. Heavy From the Skilled Trades Act, Section 7 "Except as otherwise provided in this article or in subsection (3), and individual other than an individual ...
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Add to cartA fixed light will be allowed to be 30 amp provided the socket is rated ____ duty. a. Light b. Medium c. Heavy d. Extra Heavy - ANSWERc. Heavy From the Skilled Trades Act, Section 7 "Except as otherwise provided in this article or in subsection (3), and individual other than an individual ...
Conductors with _____ marked on the insulation are NOT approved for use in a wet location. a. THW b. THHW c. THHN d. THWN - ANSWERTHHN As shown in Table 310.104(A), conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insula...
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Add to cartConductors with _____ marked on the insulation are NOT approved for use in a wet location. a. THW b. THHW c. THHN d. THWN - ANSWERTHHN As shown in Table 310.104(A), conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insula...
When going through a wood stud to install NM cable, you must leave at least ___" of wood between the edge of the stud and the edge of the hole. If this distance cannot be maintained then metal plates at least ____" thick shall be used to protect the cables. - ANSWERWhen going through a wood st...
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Add to cartWhen going through a wood stud to install NM cable, you must leave at least ___" of wood between the edge of the stud and the edge of the hole. If this distance cannot be maintained then metal plates at least ____" thick shall be used to protect the cables. - ANSWERWhen going through a wood st...
Where conduits enter a floor-standing switchboard or panelboard at the bottom, the conduits including their end fittings, shall not rise more than _____ above the bottom of the enclosure. a) 6 inches b) 4 inches c) 2 inches d) 3 inches - ANSWERD: 3 inches Ref: 408.5 When installed on the s...
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Add to cartWhere conduits enter a floor-standing switchboard or panelboard at the bottom, the conduits including their end fittings, shall not rise more than _____ above the bottom of the enclosure. a) 6 inches b) 4 inches c) 2 inches d) 3 inches - ANSWERD: 3 inches Ref: 408.5 When installed on the s...
A phase converter with a 56 ampere full-load single phase input nameplate rating, that supplies variable loads shall have an input conductor ampacity of __ amperes. Phase Converters 455.6(A)(1) - ANSWER70 The grounded conductor of a 277/480 volt 3 phase wye service shall be run to and bonde...
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Add to cartA phase converter with a 56 ampere full-load single phase input nameplate rating, that supplies variable loads shall have an input conductor ampacity of __ amperes. Phase Converters 455.6(A)(1) - ANSWER70 The grounded conductor of a 277/480 volt 3 phase wye service shall be run to and bonde...
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