Journeyman Electrician Practice Test 22

Question 1: On a 15 amp circuit, the continuous load ampere rating is ...................

• 15
• 12
• 10

Question 2: Two small wires that are connected parallel for use as a single large wire should have same length.

• True
• False

Question 3: The voltage between conductors of fluorescent lighting fixtures  of a dwelling unit or a guest room of hotel should be less than 150 volts.

• True
• False

Question 4: The demand factor may be applied to feeders and branch circuits but not to service entrance wires.

• True
• False

Question 5: In an electrical circuit, the current flow will be higher in high resistance path.

• True
• False

Question 6: Ungrounded conductors in a single phase - 3 wire electrical system are also refereed as ................................

• Hot conductors
• Neutral conductors
• Normal conductors

Question 7: In a parallel electrical circuit which of the electrical quantity is same?

• Voltage
• Current
• Resistance

Question 8: What is the resistance offered by 60 W tungsten lamp when 120 Volts is applied to it?

• 240 ohms
• 120 ohms
• 2 ohms
• 20 ohms

Question 9: The minimum clearance space required to work around motor control centers, switch panel boards etc is .................... ft

• 5 ft
• 6 1/2
• 4 1/2
• 4

NEC Reference: NEC 110.26(E)(1)

Question 10: The allowable ampacity of the branch circuit conductors shall be permitted to be not less than the sum of the continuous load plus ......................... load

• non-continuous load
• rated load
• Maximum load

NEC Reference: NEC 210.19

Question 11: Branch circuit conductors must have an ampacity not less than .............

• 80% of the maximum load
• The maximum load to be served
• 50% of the maximum load
• 110% of the maximum load

NEC Reference: NEC 210.19(A)

Question 12: Why are fluorescent lighting fixtures in dwelling units NOT subject to the 150-volt limitation of NEC 210.6(A)?

• Because fluorescent fixtures use less energy
• Because fluorescent fixtures do not use screw-shell lampholders
• Because 277V is always allowed in dwellings
• The 150V limit does not apply anywhere in a dwelling

NEC Reference: NEC 210.6(A)

Question 13: Demand factors listed in NEC Article 220 may be used to reduce the required size of which of the following?

• Branch circuit conductors only
• Feeder and service conductors
• Branch circuit OCPD ratings
• All conductors in the electrical system

Question 14: In a series electrical circuit with resistors of 10 ohms, 20 ohms, and 30 ohms connected to a 120V source, which of the following is true?

• Each resistor has a different current flowing through it
• The same current of 2 amperes flows through each resistor
• Voltage is the same across each resistor
• Total resistance equals the largest resistor value only

Question 15: In a single-phase 3-wire 120/240V system, how many ungrounded (hot) conductors are there?

• One ungrounded conductor
• Two ungrounded conductors
• Three ungrounded conductors
• No ungrounded conductors

Question 16: What is the minimum WIDTH of the working space in front of electrical equipment?

• 12 inches
• 30 inches, or the width of the equipment (whichever is greater)
• 36 inches
• 48 inches

NEC Reference: NEC 110.26(A)(2)

Question 17: If two parallel paths are available for current, which path will carry the MOST current?

• The path with the highest resistance
• The path with the lowest resistance
• Both paths carry equal current regardless of resistance
• Current does not divide in parallel paths

Question 18: In a dwelling unit, receptacle outlets in rooms must be placed so no point along any wall is more than how far from a receptacle?

• 4 feet
• 6 feet
• 8 feet
• 12 feet

NEC Reference: NEC 210.52(A)

Question 19: What is the general rule for protecting conductors with overcurrent devices?

• Conductors can be protected by any available OCPD
• Conductors must be protected at or below their rated ampacity
• Conductors may be protected by an OCPD up to 200% of their ampacity
• Only service conductors need overcurrent protection

NEC Reference: NEC 240.4

Question 20: A 100-watt lamp operates on 120 volts. What is its resistance?

• 100 ohms
• 144 ohms
• 120 ohms
• 240 ohms

Question 21: The true power formula for a balanced 3-phase system is .............

• P = V × I × PF
• P = √3 × VL × IL × PF
• P = 3 × VL × IL × PF
• P = VL × IL only

Question 22: What primarily limits the magnitude of a short-circuit fault current in an electrical system?

• Only the rating of the circuit breaker
• The total impedance of the fault path including source impedance
• The length of the conductors only
• The ambient temperature at the fault location

Question 23: How many 20-ampere small-appliance branch circuits are required in the kitchen of a dwelling unit?

• One 15-ampere circuit
• Two 20-ampere circuits
• One 20-ampere circuit
• Three 20-ampere circuits

NEC Reference: NEC 210.11(C)(1)

Question 24: How many 20-ampere laundry branch circuits are required in a dwelling unit?

• No dedicated circuit required
• At least one 20-ampere circuit
• Two 15-ampere circuits
• One 15-ampere circuit

NEC Reference: NEC 210.11(C)(2)

Question 25: In a kitchen, countertop receptacles must be placed so that no point of the countertop is more than ............. from a receptacle.

• 12 inches
• 24 inches
• 36 inches
• 48 inches

NEC Reference: NEC 210.52(B)

Question 26: In a dwelling unit kitchen, GFCI protection is required for all 125-volt, single-phase, 15- and 20-ampere receptacles that are .............

• More than 10 feet from a sink
• Serving countertop surfaces or within 6 feet of a sink
• Only those on dedicated small-appliance circuits
• Only those installed after 2005

NEC Reference: NEC 210.8(A)(6)

Question 27: Feeder conductors must have an ampacity not less than .............

• The branch circuit load only
• The maximum calculated feeder load
• 50% of the total connected load
• The service entrance conductor size

NEC Reference: NEC 215.2(A)

Question 28: A circuit with a unity power factor (PF = 1.0) has .............

• Maximum reactive power
• Zero reactive power — apparent power equals true power
• A lagging current greater than 90°
• Maximum inductive load

Question 29: An overcurrent protective device must have an interrupting rating not less than .............

• Its own current rating
• The maximum available fault current at its location
• 125% of its rated continuous current
• The total connected load current

NEC Reference: NEC 110.9

Question 30: What is the minimum clearance required for service-drop conductors passing above a roof (where the roof is accessible to workers)?

• 3 feet
• 8 feet
• 10 feet
• 12 feet

NEC Reference: NEC 230.24(A)