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Journeyman Electrician Exam Prep: Questions and Answers 2023-2024, Exams of Electrical Engineering

Eastern Shore Community College Bookstore Electrical Engineering

A series of questions and answers designed to help individuals prepare for a journeyman electrician exam. It covers a range of topics related to electrical theory, including frequency measurement, power factor, impedance, voltage production in generators, capacitor functions, insulation materials, grounding, motor power equivalence, illumination measurement, conductor properties, circuit testing, transformer ratios, and inductance. The questions are multiple-choice or true/false, with the correct answers provided. This material is useful for those studying to become certified electricians or for anyone seeking to improve their knowledge of electrical principles. The document spans multiple pages and includes questions related to both ac and dc circuits, motor operation, and safety practices.

Typology: Exams

2024/2025

Available from 05/17/2025

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1. 1. Frequency is measured in which of the fol lowing Answer:

A. Voltage

Watts

C. Hertz

D. None of the aboveAnswer: c

2. 2. For electroplating power , which of the fol lowing generators should be used

Answer:

A. Separately excited

B. Delta system

C. Split phase

D. None of the aboveAnswer: a

3. 3. Power factor is equal to which of the follow ing Answer:

A. Apparent power multiplied by true power

B. True power divided by apparent power

C. Watts multiplied by amps

D. None of the aboveAnswer: b

4. 4. The combined opposition to current by re sistance and reactance is which of the

follow ing

A. " Z "

B. Impedance

C. Both of the above

None of the

aboveAnswer: b

5. 5. In a generator voltage is produced by which of the following conditions Answer:

A. Electrical pressure

B. Vibration

C. Magnetism

D. Cutting lines of forceAnswer: d

6. 6. A capacitor performs which of the following functions

A. It opposes changes in voltage

B. It generators voltage

C. It creates changes in amperage

D. None of the aboveAnswer: A

7. 7. Where the current flow through a conductor is greatest will be the point where the

voltage drop is the lowest .

A. True B. FalseAnswer: F

8. 8. Of all of the materials used for insulation which of the following has the highest

electri cal breakdown strength and the longest life Answer:

A. Rubber

B. Cloth

Partial preview of the text

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1. Frequency is measured in which of the fol lowing Answer: A. Voltage Watts C. Hertz D. None of the aboveAnswer: c
1. For electroplating power , which of the fol lowing generators should be used Answer: A. Separately excited B. Delta system C. Split phase D. None of the aboveAnswer: a
1. Power factor is equal to which of the follow ing Answer: A. Apparent power multiplied by true power B. True power divided by apparent power C. Watts multiplied by amps D. None of the aboveAnswer: b
1. The combined opposition to current by re sistance and reactance is which of the follow ing A. " Z " B. Impedance C. Both of the above None of the aboveAnswer: b
1. In a generator voltage is produced by which of the following conditions Answer: A. Electrical pressure B. Vibration C. Magnetism D. Cutting lines of forceAnswer: d
1. A capacitor performs which of the following functions A. It opposes changes in voltage B. It generators voltage C. It creates changes in amperage D. None of the aboveAnswer: A
1. Where the current flow through a conductor is greatest will be the point where the voltage drop is the lowest. A. True B. FalseAnswer: F
1. Of all of the materials used for insulation which of the following has the highest electri cal breakdown strength and the longest life Answer: A. Rubber B. Cloth

C. Impregnated paper D. Colored vinylAnswer: C

1. A ground rod shall not be less than 8 feet long. A. True B. FalseAnswer: T
1. A three horse power motor is equivalent to which of the following in watts Answer: A. 746 watts 2238 watts C. 3000 watts D. None of the aboveAnswer: B
1. Illumination is measured in which of the following units Answer: A. Lumens B. Foot candles C. Light per square inch D. None of the aboveAnswer: B
1. Some copper conductors are tinned to help prevent chemical reaction Answer: A. True B. FalseAnswer: T
1. Which of the following should be tested to check for voltage ground Answer:

A. From the breaker to the grounding neutral B. From hot to neutral C. From a breaker to the cabinet D. All of the aboveAnswer: D

1. During one complete rotation of 360 de grees , a three - phase 6 - pole AC 34 kVA alter nator on a Yconnected system will have how many of the following rotations A. 4 B. 3 C. 18 D. 12Answer: B
1. Which of the following terms is used to de scribe the inductive action which causes cur rent to flow on the outer surface of a conduc tor A. Halo effect B. Inductance C. Skin effect D. Insulated par valueAnswer: C
1. The wattage rating of a resistor determines its ability to absorb heat. A. True B. FalseAnswer: F

B. A service drop C. A guy wire D. None of the aboveAnswer: C

1. Which of the following is characteristic of inductance? A. It creates opposition to voltage. B. It opposes changes in current. C. It creates changes in current. D. None of the aboveAnswer: B
1. Magnetic lines of force are also known as which of the following Answer: A. Flux B. Alternating currents C. Reactance D. None of the aboveAnswer: A
1. Electric motors operate on the principal of induction and repulsion A. True B. FalseAnswer: T
1. In applications where high starting torque is required , DC series motors are generally used. A. True B. FalseAnswer: T
1. If a motor enclosure is designed to contain sparks or flashes that could ignite surrounding vapors or gases , then the enclosure is consid ered to be which of the following A. Ventilated B. Explosion proof C. Explosion resistant D. Fire proofAnswer: B
1. The output of 3 phase transformer is measured in which of the following units Answer: A. Volts B. Amperes C. Volt - amps D. WattsAnswer: C
1. In order to change the rotation of a DC series motor which of the following must be done Answer: A. The motor must be converted to ac. B. F1 and F2 must be reversed. C. The capacitor leads must be reversed D. The frequency must be alteredAnswer: B
1. Bonding does which of the following Answer: A. Provides electrical continuity

B. Regulates the voltage C. Controls the load on the system installa tion D. All of the aboveAnswer: A

1. A meter used to measure both AC and DC voltage and current is known as which of the following Answer: A. An ohms meter B. A multimeter C. A resistance meter D. None of the aboveAnswer: B
1. Which of the following materials is used on conduits inside and outside of a box Answer: A. Bushings B. Couplings C. Lock nuts D. All of the aboveAnswer: c
1. In a coil , the higher the level of self inductance Answer: A. The lower the level of resistance will be B. The longer the delay will be in establishing current through it C. The greater the level of flux produced will be D. None of the aboveAnswer: b
1. A negative charge will do which of the following Answer: I. Interact with negative charges II Interact with positive charges III. Cause a short in positive system

A. I & III B. I & II C. I only D. All of the aboveAnswer: B

1. If a circuit breaker is installed vertically and the handle is flipped up , then the cir cuit breaker will be which of the following A. Off B. Unable to operate properly C. On D. Locked in placeAnswer: C
1. A dielectric electrical element is which of the following Answer: A. A capacitor B A grounding conductor C. An insulator D. None the aboveAnswer: C

C. The wires are spaced too far apart D. None of the aboveAnswer: A

1. Inductance and capacitance are not con siderations in a DC current for which of the following reasons Answer: A. Dc supply has no frequency B. Dc supply carries power equall C. Both of the above D. None of the aboveAnswer: A
1. Rearranging the control components in an electrical diagram in order to simplify tracing of a circuit is an example of a schematic diagram. A. True B. FalseAnswer: T
1. If the power factor of a circuit is in creased then which of the following oc curs Answer: A. The active power is increased B. The reactive power decreased C. Both of the above D. None of the aboveAnswer: B
1. In a 30 circuit how many electrical degrees separate each phase Answer: A. 3 B. 120 C. 180 D. 360Answer: B
1. Ground fault protection for personnel on a 120 volt single - phase circuit is based on which of the following A. Ungrounded current between conductors B. Unbalanced current between the grounded and ungrounded conductor C. Overload in the current carrying conduc tor D. Excessive voltage in the grounding con ductorAnswer: B
1. Electrical appliances shall be installed in parallel in order to make the operation of each appliance independent of the others A. True B. FalseAnswer: A
1. In order to calculate watt hours , which of the following formulas must be used Answer: ‘. • 2 ™ ¤ B. Amps Volts C. E I T D. 24 ( EIT )Answer: C

1. The peak value of AC voltage deter mines the breakdown voltage of insula tion. A. True B. FalseAnswer: A
1. The efficiency of electrical equip ment is determined by which of the fol lowing Answer: A. The amount of friction present B. The motor speed divided by the input power C. The power output divided by the input D. None of the aboveAnswer: C
1. Which of the following is not appli cable to an AC system A. It can be transformed. B. It develops eddy currents. C. It can interfere with communications lines. D. It is suitable for charging batteries .Answer: D
1. In order to correct a low power fac tor which of the following should be checked first Answer: A. Resistance B. Watts C. Inductive load D. All of the aboveAnswer: C
1. Which of the following is used to control speed in a DC motor Answer: A. Field winding B. A primary transformer C. Ground fault breaker D. A bonding jumperAnswer: A
1. In order to connect an ammeter in se ries the circuit must be opened at the voltage source and connected to the meter at the other end A. True B. FalseAnswer: B
1. In an alternator frequency is determined by which of the following Answer: A. Motor size B. Rotation speed of the armature C. Voltage D. All of the aboveAnswer: B
1. In a transformer , the voltage per turn in the primary relates to the voltage per turn in the secondary in which of the following ways A. The primary is more B. The secondary is more C. They are the same D. None of the aboveAnswer: C

1. A resistor's ability to absorb heat is gauged in which of the following units Answer:

A. Watts B. Ohms C. Volts D. AmpsAnswer: A

1. The rate of flow of the electrical charges through a conductor is which of the following Answer: A. Watts B. Ohms C. Voltage D. CurrentAnswer: D
1. The amperage of a three - phase system can be calculated as which of the following Answer: A. Watts divided by the value of the voltage times 1. B 1.73 watts divided by volts C. Volts times 1. D. Power factor divided by the value of the voltage times 1.73Answer: A
three the 82. Efficiency is calculated as output di vided by input. A. True B. FalseAnswer: A
1. Circuits that are run in series Answer: A. Have total voltage of 8.92 per circuit B. Have a total resistance equal to the sum all the resistors C. Must be connected to a bonding jumper D. All of the aboveAnswer: B
None of 85. The temperature of the area surround ing conductor is known as the ambient temperature. A. True B. FalseAnswer: A
1. An electric motor driven air com pressor is automatically started and stped by a A. thermostat B. line air valve C. pressure switch D. float trapAnswer: C
1. The term kilowatt hours de scribes the consumption ol A. energy B. radiation

C. cooling capacity D. conductanceAnswer: A

1. AC voltage may be converted to DC voltage by means of a A. magneto B. rectifier C. voltage regulator D. transducerAnswer: B
1. When replacing blown fuse , it is BEST to A. install another one of slightly larger size B. seek the cause lhe fuse failure before re placing it C. install another one of size smaller D. read the electric meters as a check on the condition of the circuitAnswer: B
1. An interlock is generally installed on electronic equipment fo A. prevent loss of power B. maintain vhf frequencies C. keep the vacuum tubes lit D. prevent electric shock during mainte nance operationsAnswer: D.
1. A flame should NOT be used to inspect the electrolyte level in a lead acid battery because the battery cells give off highly tlammable A. hydrogen B. lead oxide C. lithium D. xenonAnswer: A.
1. You are informed lhat an employee under your supervision has just in jured in the building. The FIRST course of action you should is to A. inform your superior B. aid the injured employee C. call a meeting of all the men D. order an investigationAnswer: B.
1. In the prevention of accidental injuries , the MOST effective procedure is to A. install safety guards B. alert the workers to the hazard C. install lighting for easy sight , D. eliminate the accident hazal'dAnswer: D.
1. The one of the following practices that will INGREASE the possibility of fires oc curring is the A. using under stairs areas for storage of all kinds B. wipigp of machinery shafts with lubricat ing oil

b. Eliminates over - expansion in the future c. Makes qualified workers easily accessible d. Provides a standard for the Authority Having JurisdictionAnswer: a

1. Circuits rated at less than 100 amps , or with conductors sized between 14 AWG and AWG are only suitable for conductors of the following ratings Answer: a. 55 degrees C ( 131 degrees F ) b. 60 degrees C ( 140 degrees F ) c. 75 degrees C ( 167 degrees F ) d. 80 degrees C ( 176 degrees F )Answer: b
1. Covers for underground pull boxes used for circuits over 600 volts that are not locked , bolted or screwed must weigh the same as Answer: a. 25 pounds b. 50 pounds c 75 pounds d 100 poundsAnswer: d
1. Parallel circuits experience the following total power loss a. Dissipation of individual power b. Multiple the circuits the sum of their individual circuits c. The total current flowing through each branch of the circuit d None of the aboveAnswer: a
1. If the number of circuits in an enclosure is limited , it will not be possible to minimize the effects of a ground fault in just one circuit. a True b. FalseAnswer: F
1. An independent grounding connection must be for any new current transformer associated a potentially energized circuit. a. True b. FalseAnswer: F
1. A feeder's calculated load must be 75 % or less of the sum of branch circuit loads after derating factors are applied a. True b FalseAnswer: F
1. To supply power to screw shell lamp holders voltages over 120 volts between conductors must not exceed 277 volts. a True b. FalseAnswer: F
1. According to Kirchoff's current law , electrical current will do which of the following in parallel circuits Answer: a. Combine in the parallel path b. Divide and flow through each parallel path c. Increase in voltage d. Experience a voltage dropAnswer: B

1. When electrical current is given mul tiple conductive paths to flow the cur rent will always take the path of least resistance. a. True b FalseAnswer: F
1. Electrical wires were covered with asbestos protect them from damage A. high voltage B. high temperatures C. water damage D. electrolysisAnswer: B
1. The rating term 240 volts , 10 H.P. would be properly used to describe a A. transformer B. storage battery C. motor D. rectifierAnswer: c
1. In order to protect electrical wiring , rigid steel conduit is usually galvanized or enameled both inside and outside A. prevent damage the wire insulation B. make threading of the conduit easier C. prevent corrosion of the conduit. D. make the conduit easier handleAnswer: c
1. The term BX is often used to indicate A. rigid conduit without wires B. 1lexible conduit without wires C. insulated wires covered with flexible steel armor D. insulated wires covered with a non metallic coveringAnswer: c
1. Test lamps that don't light up when placed in series with fuses and bat teries indicate a blown fuse A. is open - circuited B. is short - circuited C. is in operating condition D. has zero resistanceAnswer: a
1. One of the easiest wood joints to make is A. half - lap joint B. mortise and tenon C. butt joint D. multiple dovetailsAnswer: c
1. A 45 - degree angle saw is the best tool to use when cutting lengths of wood A. protractor

B. Bearing C. Bonding D. TensionAnswer: d

1. When smooth dense finish is de sired for concrete surfaces it is BEST achieved by using a A. Wood float B. Level C. Steel trowel D. VibratorAnswer: c
1. There is a device that prevents sewer gas from backing up through a fixture A. Water trap B. Vent pipe C. Check valve D. Float valveAnswer: a
1. An adjustable water valve uses packing primarily to prevent leaks A. Make it air - tight B. Prevent mechanical wear C. Regulate the water pressure D. Make it water - tightAnswer: d
1. Water pipes should be reamed after they have been cut to length to remove the inside burr. Reaming serves the purpose of A. Finish the pipe accurately to length B. Make the threading easier C. Avoid cutting of the workers ' hands D. Allow free passage for the flow of waterAnswer: d
1. Generally , steam pipes are pitched in heating systems to A. Prevent accumulation of condensed steam B. Present a smaller radiating surface C. Facilitate repairs D. Reduce friction in the pipeAnswer: a
1. It most likely that poor alignment of pipe and fittings will lead to problems when fitting pipes together A. Leaky joints B. Cracking of the expansion C. Formation of hot spots D. Cracking of the pipe on contractionAnswer: a
1. If an installation has two 2 wire branch circuits then the service disconnecting means must be rated at not less than which of the fol lowing Answer: A. 15 amps

B. 30 amps C. 50 volts D. 110 voltsAnswer: b

1. The required distance between outlets along floor line any wall space in the living room a dwelling unit is which of the following A. more than 6 feet measured horizontally from one outlet another B. Every 10 feet C. Only one outlet required per wall D. None of the aboveAnswer: a
1. In a dwelling unit a amp branch circuit is permitted to supply several fixed electric heaters Answer: A. True B. FalseAnswer: F
1. Live parts on equipment operating at 120 volts must have a working clearance in front of them of at least three feet Answer: A. True FalseAnswer: t
1. An auxiliary gutter is not permitted to ex tend for more than which the following dis tances A. 6 feet B. 10 feet C. 20 feet D. None of the aboveAnswer: d
1. Single phase loads connected on the load side of phase converter shall be permitted to be connected to which the following A. Grounded phase B. Neutral C. High leg D. All of the aboveAnswer: d
1. The ampacity of conductor must be derated where the ambient tem- perature exceeds which of the following A. 150 Degrees B. 112 Degrees F C. 86 Degrees F D. 20 Degrees CAnswer: c
1. The type of switch required in each lo cation to independently control a light fix ture from different locations is which of the following Answer: A. Single pole , double throw B. Double pole , single throw C. Double pole , double throw D. Three way single throwAnswer: a

considered to be in which of the following locations Answer:

A. Commercial class B. Dry C. Wet D. DampAnswer: d

1. The decimal equivalent of the fraction 9/16 is which of the following Answer: A. 0. B. 0. C. 0. D. None of the aboveAnswer: d
1. Formal interpretation of the National Electrical Code is found in which of the fol lowing Answer: A. Nfpa® 70e B. International electrical code C. Nfpa® regulations governing committee project D. Osha standardsAnswer: c
1. Solid dielectric insulated conductors in permanent installations oper- ating over 2000 volts shall meet which of the following requirements A. Be shielded B. Have ozone - resistant insulation C. Both a & b D. Neither of the aboveAnswer: c
1. The minimum service load for each individual mobile home in a mobile home park is which of the following A. 12,000 volt - amperes B. The greater 14,000 volt - amperes or the calculated load C. 16,000 volt amperes D. None of the aboveAnswer: d
1. The maximum allowable voltage drop for branch circuits and feeders combined shall not exceed percent of the circuit voltage A. True B. FalseAnswer: d
1. A lamp that is 1000 watt 120 - volt will use same amount of energy as a 14.4 ohm resistor at which of the following Answer: A. 1200 watts B. 240 volts C. 144 volts D. 120 voltsAnswer: D
1. The separation distance non current - carrying metal parts of electri cal equipment and lightning protection conductors is which of the following Answer:

Journeyman Electrician Exam Prep: Questions and Answers 2023-2024, Exams of Electrical Engineering

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Download Journeyman Electrician Exam Prep: Questions and Answers 2023-2024 and more Exams Electrical Engineering in PDF only on Docsity!