FREE AND STUDY GAMES ABOUT CODE AND PRACT CH 4

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FREE AND STUDY GAMES ABOUT CODE AND PRACT CH 4

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -30 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 22. NEC 392.60 permits steel and aluminum cable tray to be used as an equipment grounding conductor as long as __(multiple choice

Answer:

all of above Question 2: 21. The inside radius of a fitting used to change the direction, either horizontal or vertical, can be __ (12",24"36"48", any of above)

Answer:

any of the above Question 3: 8. Each cable tray fitting must be marked with which of the following ( manufacturer's name or trademark, type of material, "WARNING DO NOT USE AS A WALKWAY,

LADDER,OR SUPPORT FOR PERSONNEL. USE ONLY AS A MECHANICAL SUPPORT FOR

CABLES...., or none

Answer:

A, B , & C

Question 4: 2. Cable tray materials include ___. (aluminum, stainless steel, pre-galvanized steel, hot-dip galvanized steel, all of the above)

Answer:

all of the above Question 5: 11. Aluminum is often the material of choice for cable tray installations because it __ (is corrosion resistant in certain environmnents, is lightweight, has a high strength-to-weight ratio, is maintenance free, is nonmagnetic)

Answer:

all Question 6: 25. Identify the document that provides detailed information for drilling holes for the installation of splice plates in field-cut cable tray (NEC, NEMA FG1, NEMA VE1, NEMA VE2

Answer:

NEMA VE 2

Question 7: 14. If a cable tray system will be subjected to thermal expansion and contraction, expansion splice plates must be considered during the installation T/F

Answer:

True Question 8: 6. A cable tray having openings on the bottom sufficient for the passage of air and utilizing 75% or less of the plan area of the surface to support cables is known as a ___

Answer:

ventalized cable tray Question 9: 28. The total difference between the minimum winter and maximum summer temperatures a cable tray system may be subject to must be considered to account for thermal expansion and contraction. T/F

Answer:

True Question 10: 7. Covers for cable trays should generally be installed __ (in a vertical tray run accessible by pedestrian & vehicular traffic, where falling objects may damage cables, outdoors, all)

Answer:

A, & B

Question 11: 9. NEMA VE 2 addresses which of the following (handling, load capacity, maintenance, modification, shipping, storing)

Answer:

all except not load capacity Question 12: 16. Support locations of cable tray straight in a continuous run should follow the __ rule. (1/4, 1/3, 1/2, 1/1)

Answer:

1/4 Question 13: 15. Deflection of non-metallic cable tray can be adversely affected by ___

Answer:

elevated temperatures Question 14: 1. A cable tray system is defined as a system of raceways and associated fittings used to securely fasten or support cables. T/F

Answer:

False Question 15: 23. A bare copper electrical grounding conductor cable can be used in or on aluminum cable tray

Answer:

False Question 16: 30. Identify the NEC sections where uses permitted and uses not permitted are addressed ( 392.1 an 392.2; 392.10 and 392.12; 392.18 and 392.20; 392.22 and 392.30)

Answer:

392.10 and 392.12) Question 17: 3. ___ specifies the requirements for fiberglass cable trays and associated fittings designed for use in accordance with the requirements of the NEC

Answer:

NEMA FG1

Question 18: 12. fittings are subject to NEMA/CSA load ratings T/F

Answer:

False

Question 19: 19. What is meant by a NEMA 12A load/span class designation

Answer:

if it is 2 span A it means you must support every 12 feet.Question 20: 4 A __ is a prefabricated metal structure consisting of two longitudinal side rails connected by individual transverse members

Answer:

ladder cable tray Question 21: 18. A prefabricated metal structure consisting of a one-piece ventilate bottom or solid bottom channel section, or both, not exceeding six inches in width best describes a ___

Answer:

channel cable tray Question 22: 5. Cable trays containing conductors rated over 600 volts must have a permanent, legible warning notice carrying the wording "DANGER-HIGH VOLTAGE-KEEP AWAY" placed in a readily visible position on all cable trays. T/F

Answer:

True Question 23: 10. Lengths of straight sections of cable tray are generally manufactred in which of the following lengths (10', 12',20',24',25')

Answer:

12' & 24' Question 24: 29.Identify the type of splice plate that must be used to account for thermal expansion and contraction of a cable tray system. (adjustable, expansion, offset reducing, step-down)

Answer:

Expansion