Journeyman Electrician Practice Test 28

Question 1: <span style="font-size: 14pt;">The FMC cable shall be supported and secured at intervals less than ......................</span>

• less than 3 1/2 inches
• less than 4 1/2 inches
• less than 5 1/2 inches
• less than 6 1/2 inches

NEC Reference: NEC 348.30(A)

Question 2: Which of the following is the minimum clear workspace that shall be provided to electrical equipment rated at 601 volts that has exposed live parts on its both sides?

• 3 feet
• 4 feet
• 5 feet
• 6 feet

NEC Reference: NEC 110.34

Question 3: The ampacity of the branch circuit conductors of 600 volts normal or more shall not be less than 150 % of rated designated load of the utilization equipment.

• True
• False

NEC Reference: NEC 210.19(B)(1)

Question 4: The grounded conductor ampacity of  a 3 -phase 3-wire delta connected service shall be 50% of that ungrounded conductor?

• True
• False

NEC Reference: NEC 250.24(C)

Question 5: The over current device  that feeds the marina shall have a ground fault protection not exceeding ......................

• 100 mA
• 150 mA
• 120 mA
• 80 mA

NEC Reference: NEC 555.3

Question 6: Which of the following is the minimum size of copper grounding conductor that shall be used in marina?

• No 12 AWG
• No 8 AWG
• No 10 AWG
• No 6 AWG

NEC Reference: NEC 555.15(C)

Question 7: The resistance of a conductor is 0.5 ohms and an ammeter in series indicates 4 amperes. What is the power loss in the conductor?

• 8 watts
• 2 watts
• 4 watts
• 32 watts

Question 8: The lighting load of the dwelling unit is 8000 watts, what is the computed total load of service feeder?

• 4750 watts
• 8000 watts
• 6000 watts
• 5550 watts

NEC Reference: NEC 220.42

Question 9: If four conductors are placed in a raceway, which of the following is the maximum allowable load current of each conductor?

• 80 % of ampere rating of the conductor
• maximum ampere rating of the conductor
• 70 % of ampere rating of the conductor
• 60 % of ampere rating of the conductor

NEC Reference: NEC 310.15(B)(3)

Question 10: Which of the following law states that opposite poles of an element attract each other?

• coulombs law
• joules law
• Flemming law

Question 11: For electrical equipment rated above 600 volts, what is the minimum working clearance depth when live parts are on one side and the other side has only grounded surfaces (Condition 1)?

• 3 feet
• 4 feet
• 5 feet
• 6 feet

NEC Reference: NEC 110.34(A)

Question 12: Branch circuit conductors supplying utilization equipment rated 600 volts or more shall have an ampacity of not less than .............

• 100% of the rated load
• 125% of the rated load
• 150% of the rated load
• 80% of the rated load

NEC Reference: NEC 210.19(B)(1)

Question 13: When 6 current-carrying conductors are placed in a single conduit, their ampacity must be derated by how much?

• 70% of table ampacity
• 80% of table ampacity
• 50% of table ampacity
• 90% of table ampacity

NEC Reference: NEC 310.15(C)(1)

Question 14: A dwelling unit has a general lighting load of 12,000 VA. What is the calculated feeder demand per NEC Table 220.42?

• 12000 VA
• 6150 VA
• 4200 VA
• 8000 VA

NEC Reference: NEC Table 220.42

Question 15: Ground fault protection at a marina protects against which danger specific to marinas?

• Flooding of the electrical panels
• Electric shock drowning from current leaking into the water
• Lightning strikes on masts
• Overloading of shore power cords

Question 16: Fleming's left-hand rule is used to determine the direction of .............

• Induced EMF in a generator
• Force (motion) on a current-carrying conductor in a motor
• Direction of magnetic flux
• Direction of electron flow in a conductor

Question 17: Coulomb's Law states that the force between two electric charges is .............

• Proportional to the distance between charges
• Proportional to the product of the charges and inversely proportional to the square of the distance
• Always attractive regardless of charge type
• Equal to the voltage between the charges

Question 18: What is the minimum burial depth for conductors in Rigid Metal Conduit (RMC) installed underground?

• 24 inches
• 6 inches
• 18 inches
• 12 inches

NEC Reference: NEC Table 300.5

Question 19: What is the minimum burial depth for conductors in PVC conduit (Schedule 40 or 80) installed underground for a 120/240V residential service?

• 6 inches
• 18 inches
• 24 inches
• 12 inches

NEC Reference: NEC Table 300.5

Question 20: Faraday's Law of Electromagnetic Induction states that an EMF is induced in a conductor when .............

• Current flows through it
• There is a change in the magnetic flux linking it
• Voltage is applied to it
• It is placed in a static magnetic field

Question 21: For a 25-foot feeder tap conductor, the ampacity of the tap conductor must be at least ............. of the OCPD rating protecting the feeder.

• 1/2 (50%)
• 1/3 (33%)
• 1/4 (25%)
• 1/10 (10%)

NEC Reference: NEC 240.21(B)(2)

Question 22: A tap conductor no longer than 10 feet may be connected to a feeder if the tap conductor's ampacity is not less than ............. of the overcurrent device protecting the feeder.

• 1/3 (33%)
• 1/10 (10%)
• 1/4 (25%)
• 1/2 (50%)

NEC Reference: NEC 240.21(B)(1)

Question 23: In an AC circuit with a total impedance of 10 ohms connected to 120V, what is the current?

• 1200 amperes
• 12 amperes
• 10 amperes
• 120 amperes

Question 24: When connecting Flexible Metal Conduit (FMC) to boxes and fittings, what type of connectors must be used?

• Any available metallic fitting
• Listed fittings identified for use with FMC
• EMT compression fittings
• Taped connections without fittings

NEC Reference: NEC 348.42

Question 25: The disconnecting means for a motor must be located .............

• At the main electrical panel only
• Within sight from the motor controller and accessible
• Anywhere within 100 feet of the motor
• At the nearest junction box

NEC Reference: NEC 430.102(A)

Question 26: Per NEC Article 100, "within sight from" (or "in sight from") means .............

• In the same room regardless of distance
• Visible and not more than 50 feet away
• Visible and not more than 100 feet away
• In the same building

NEC Reference: NEC 100

Question 27: When electrical equipment is listed and labeled (UL, ETL, etc.), the NEC requires that it be .............

• Installed in any way the electrician considers appropriate
• Used and installed in accordance with the listing instructions
• Replaced after 10 years regardless of condition
• Inspected annually by the listing organization

NEC Reference: NEC 110.3(B)

Question 28: Per NEC Article 100, "listed" equipment is equipment that .............

• Is approved by the local electrical inspector
• Is included in a published list by an organization acceptable to the AHJ
• Is manufactured in the United States
• Has a minimum 5-year warranty

NEC Reference: NEC 100

Question 29: NEC Table 555.12 gives demand factors for shore power receptacles at marinas. What is the demand factor for 3 receptacles?

• 100%
• 80%
• 70%
• 90%

NEC Reference: NEC Table 555.12

Question 30: An ammeter used to measure current in a circuit must be connected .............

• In parallel with the load
• In series with the circuit
• Across the voltage source
• At the panel only