TPC 205.1 ELECTRICAL SAFETY AND
PROTECTION FINAL PAPER UPDATED
COMPLETE QUESTIONS AND CORRECT
ANSWERS
●● What is the minimum oxygen level before the atmosphere is
considered oxygen deficient?
Answer: 19.5%
●● What is the maximum oxygen level before the atmosphere is
considered oxygen enriched?
Answer: 23.5%
●● What is the first step in establishing an electrically safe work
condition?
Answer: Identify all power sources
●● What must be applied after isolating equipment?
Answer: Lockout/Tagout (LOTO)
●● What verifies the absence of voltage?
Answer: An adequately rated test instrument
, ●● What sequence is used to verify a meter?
Answer: Live-Dead-Live
●● What NFPA standard covers electrical safety?
Answer: NFPA 70E
●● What OSHA regulation covers permit-required confined spaces?
Answer: 29 CFR 1910.146
●● How far must a portable ladder extend above a landing?
Answer: 3 feet
●● What gas creates an explosion hazard in battery rooms?
Answer: Hydrogen
●● What should be available in battery rooms?
Answer: Eyewash station
●● What type of PPE protects from arc flash?
Answer: Arc-rated clothing
PROTECTION FINAL PAPER UPDATED
COMPLETE QUESTIONS AND CORRECT
ANSWERS
●● What is the minimum oxygen level before the atmosphere is
considered oxygen deficient?
Answer: 19.5%
●● What is the maximum oxygen level before the atmosphere is
considered oxygen enriched?
Answer: 23.5%
●● What is the first step in establishing an electrically safe work
condition?
Answer: Identify all power sources
●● What must be applied after isolating equipment?
Answer: Lockout/Tagout (LOTO)
●● What verifies the absence of voltage?
Answer: An adequately rated test instrument
, ●● What sequence is used to verify a meter?
Answer: Live-Dead-Live
●● What NFPA standard covers electrical safety?
Answer: NFPA 70E
●● What OSHA regulation covers permit-required confined spaces?
Answer: 29 CFR 1910.146
●● How far must a portable ladder extend above a landing?
Answer: 3 feet
●● What gas creates an explosion hazard in battery rooms?
Answer: Hydrogen
●● What should be available in battery rooms?
Answer: Eyewash station
●● What type of PPE protects from arc flash?
Answer: Arc-rated clothing
