Question and answer
1. What hazardous location designation applies to facilities where flammable gases are handled, processed or used, but under normal circumstances there is not a threat of explosion? A. Class II, Division 1 C. Class I, Division 1 B. Class I, Division 2 D. Class II, Division 2 2. Which of the following is not a requirement for receptacles located at patient bed sites? A. Listed as hospital grade B. Minimum of four per patient bed site C. Tamper resistant for pediatric locations D. GFCI-Type Transformers and Special Locations Lesson 5 Examination When you feel confident that you have mastered
the material in Lesson 5, go to http://www.takeexamsonline.com and submit your answers online. If you don’t have access to the Internet, you can phone in or mail in your exam. Submit your answers for this examination as soon as you complete it. Do not wait until another examination is ready. Questions 1–20: Select the one best answer to each question. EXAMINATION NUMBER 00681800 Whichever method you use in submitting your exam answers to the school, you must use the number above. For the quickest test results, go to http://www.takeexamsonline.com68 Examination, Lesson 5 3. Two electricians are discussing guarding requirements for transformers. Electrician A says that a warning sign indicating the operating voltage of live parts on a transformer is required if the live parts are exposed. Electrician B says that dry-type transformers can be installed without an enclosure. Which of the following statements is correct? A. Only Electrician A is correct. C. Both electricians are correct. B. Only Electrician B is correct. D. Neither electrician is correct. 4. Ignoring any exceptions, which of the following transformer types is not required to be installed in a vault? A. Oil-insulated, installed indoors B. Dry-type, indoor, rated over 35 kV C. Nonflammable fluid-insulated, insulated rated over 35 kV D. Dry-type, indoor, rated 1121 / 2 kVA or less 5. To be in compliance with the NEC, transformer vaults must have a fire-resistance rating of _______ hours and concrete floors that are at least _______ inches thick, unless protected by automatic sprinkler systems. A. 1, 3 C. 3, 4 B. 2, 3 D. 4, 4 6. In Class II, Division 2, conditions fuses, switches, circuit breakers, and similar devices must be installed in enclosures that are A. airtight. C. watertight. B. dust tight. D. vapor proof. 7. What is the maximum surface temperature for equipment that is not subject to overloads, operating in Class III locations? A. 100°C C. 329°F B. 120°C D. 453°F 8. To properly protect the 4160 V primary of a 100 kVA, 3?, nonsupervised transformer with 8 percent impedance, which of the following fuse sizes would you select? A. 40 A C. 50 A B. 45 A D. 60 A 9. Which of the following statements is false in regards to luminaires installed in Class I, Division I locations? A. Must be clearly marked to indicate maximum wattage of lamps B. Must be protected from physical damage using a suitable guard C. Must be supported by boxes identified for Class 1 locations D. Must have lamps tested and marked to indicate a T codeExamination, Lesson 5 69 10. Two electricians are discussing special requirements for health care facilities. Electrician A says that a nursing home is required to include an emergency system circuit. Electrician B says that GFCI outlets are not required in the bathroom area of some critical-care patient rooms. Which of the following statements is correct? A. Only Electrician A is correct. C. Both electricians are correct. B. Only Electrician B is correct. D. Neither electrician is correct. 11. Which of the following is a NEC violation for wiring installed in a place of assembly? A. Permanent wiring in nonmetallic raceway encased by one inch of concrete B. Permanent wiring using AC cable containing an insulated EGC C. Temporary wiring not protected by GFCIs D. Temporary wiring laid directly on the floor 12. Which of the following is not a general provision requirement for transformers per the NEC? A. Primary and secondary voltage rating on nameplate B. Ventilation that prevents temperature rise in excess of the transformer rating C. Temperature class marking for oil-insulated transformers D. Lockable disconnecting means for remote locations 13. According to the NEC, which of the following protection techniques is permitted for Class I, Division 1 or 2 Locations? A. Dust-tight equipment C. Hermetically sealed equipment B. Explosion-proof equipment D. Nonincendive equipment 14. What is the T Code for equipment having a maximum surface temperature of 392° F? A. T3 C. T4 B. T3A D. T4A 15. Two electricians are discussing transformer installations. Electrician A says that there is no size requirement for the door sill of a transformer vault as long as the sill would contain the oil from the largest transformer. Electrician B says that the AHJ can require fire rating of three hours for vault doors on an exterior wall. Which of the following statements is correct? A. Only Electrician A is correct. C. Both electricians are correct. B. Only Electrician B is correct. D. Neither electrician is correct. 16. Which of the following is not a consideration when installing a LFLI transformer indoors? A. Building type B. Voltage rating C. Automatic fire extinguishing system D. Pressure relief vent70 Examination, Lesson 5 17. What Article in the NEC would you reference to determine the wiring requirements for a local dinner theater? A. Article 520 C. Article 525 B. Article 522 D. Article 530 18. What size primary fuse is required to protect a 5 kVA, 208 V, 3? transformer? A. 13.5 A C. 17.5 A B. 15 A D. 20 A 19. Two electricians are discussing hazardous locations. Electrician A says that a motor installed in a Class II, Division 2 can be totally enclosed and fan cooled. Electrician B says that the installation requirements for motor controllers in a Class 3 location can be more relaxed than for a Class I location. Which of the following statements is correct? A. Only Electrician A is correct. B. Only Electrician B is correct. C. Both electricians are correct. D. Neither electrician is correct. 20. According to the NEC, service equipment at a carnival can’t be installed in a location accessible to unqualified persons unless the equipment is A. grounded. C. bonded. B. lockable. D. weatherproof.
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7. What is the maximum surface temperature for equipment that is not subject to overloads, operating in Class III locations? A. 100°C C. 329°F B. 120°C D. 453°F
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Updated 3/14/2015 12:01:54 PM
1 Answer/Comment
329°F is the maximum surface temperature for equipment that is not subject to overloads, operating in Class III locations.

Added 3/14/2015 12:01:54 PM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [3/14/2015 12:08:24 PM]
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