ELECTRICIANS PRACTICE EXAM

1. Disregarding exceptions, dry-type transformers located indoors having a rating of greater than _____ shall be installed in a transformer room of fire-resistant construction. A. 75 KVA B. 87 1/2 KVA C. 112 1/2 KVA D. 50 KVA - Answer- C- 112 1/2 KVA 450.21(B) pg 335 2. What is the MINIMUM height allowed for a fence enclosing an outdoor installation of 2,400 volt electrical equipment? A. 6 feet B. 7 feet C. 8 feet D. 9 feet - Answer- B - 60 7 feet 110.31 pg 49 3. Where power for equipment is directly associated with the radio frequency distribution system is carried by the coaxial cable, and the power source is a power limiting transformer, what is the MAXIMUM voltage this coaxial cable may carry? A. 50 volts B. 60 volts C. 120 volts D. 150 volts - Answer- B - 60 volts 820.15 pg 656 4. Where a 15-ampere rated general-use ac snap switch is used as a disconnecting means for an ac motor, the NEC requires the MAXIMUM full-load current rating of the motor to be NO more than _________. A. 7.5 amperes B. 10 amperes C. 12 amperes D. 15 amperes - Answer- C - 12 amperes 430.109(C)(2) pg 315 15 amperes x 80% = 12 amperes