Title: Chapter 1 and 6
Course: Industrial Wiring (IC 104-IC 104) > Section: Assessments

Q: 350kcmils cable made of copper and rated at 90 degrees F has an amperage of. . .
A: 350A

Q: A cooler of 40 degrees F has 6 cables in a raceway, they are aluminum cables of 2 Ga. with TW insulation, what is the derated ampacity of the cabling?
A: 77.4A

Q: Ground systems should be tested annually for degrading, to protect humans and equipment.
- True
- False
A: True

Q: How many conductors are allowed in a raceway before derating is necessary?
- determined by the conduit size
- varies with wire size
- varies with percent of conduit fill
- 3
- 4
A: determined by the conduit size

Q: I have 11 conductors of 8 Ga. THHN wire in a raceway, what is the correction factor?
A: 50 percent

Q: I have 4 aluminum cables running in a conduit, they are 6 Ga. with a RHW insulation. What is the ampacity of the cables?
A: 40A

Q: I have a 14.0 cu in device box will it hold 3 -10 Ga. wires?
- yes
- no
A: yes

Q: I have a 18.0 cu in square box will 6 - 12 Ga. and 2 - 14 Ga. wires fit into this box?
- yes
- no
A: yes

Q: I have a 4" x 1 ¼" round/octagonal box, how many 16 Ga. wires can I put in it?
A: 7

Q: I have a masonry box/gang that is 3 ¾" x 2" x 3 ½" what is its cu in size?
A: 21.0

Q: Resistivity of the earth is constant throughout the world, that is why we connect systems to earth ground everywhere.
- True
- False
A: False

Q: The main condition that determines ampacity of a conductor is. . .
- wet or dry conditions
- ambient temperature
- raceway material
- number of strands in a conductor
A: wet or dry conditions

Q: There are 2 cables of 2/0 Ga. copper with THW insulation in a raceway in a room that is about a 140 degrees F, what is the ampacity of the cable?
A: 101.5A

Q: Trade size is the actual size of conduit, raceways, tubing, outlet and device boxes.
- True
- False
A: False

Q: What color is the grounded circuit conductor?
A: White

Q: What is the correction factor for 49 degrees C for a 60 degree temperature rated conductor?
A: 0.58

Q: What is the cu in size of a box that is 3" x 2" x 2 ¾" that will hold a device?
A: 14.0

Q: What is the temperature rating of THHN copper designed for?
- 60 degrees C
- 194 degrees F
- 167 degrees F
- 90 degrees C
- B and D are correct
- C and D are correct
A: 60 degrees C

Q: What size of copper cable will we need for a load of 225 Amps, that is rated at 90 degrees C?
A: 3/0

Q: What type of meter is used to test insulation of a wire?
- ohmmeter
- megohmeter
- ammeter
- voltmeter
A: ohmmeter

Q: When conductors are connected in parallel, which is not a criteria of the NEC?
- same conductor length
- same conductor insulation
- same number of strand in conductors
- same termination manner
A: same conductor length

Q: When connecting conductors in parallel, you must run the same phase into the same conduit.
- True
- False
A: False

Q: Which of the ground resistance tests is the most accurate?
- Wenner 4-point method
- 3-point fall-of-potential test
- clamp-on ground resistance test
- All tests are the same
A: Wenner 4-point method

Q: Which of the three ground testing methods is the safest and most convenient?
- Wenner 4-point method
- 3-point fall-of-potential test
- clamp-on ground resistance test
A: Wenner 4-point method

Q: Wire has a positive temperature coefficient (when temperature goes up the resistivity goes up).
- True
- False
A: True