NYC CUSTODIAN ENGINEER FINAL PAPER
TESTED QUESTIONS WITH FULL SOLUTION
◉ What is the function of a fuse in a circuit?
Answer: To melt open during overcurrent
◉ What is the best action if a breaker keeps tripping?
Answer: Find and correct the cause
◉ What does grounding mainly help with?
Answer: Stabilizing the system and reducing shock hazards
◉ What is bonding in electrical systems?
Answer: Connecting metal parts together so that fault current can
clear safely
◉ What is the main purpose of a GFCI?
Answer: To protect people from ground-fault shock hazards
◉ How should a warm receptacle with scorch marks be treated?
Answer: As a likely overheating or arcing hazard
,◉ What is emergency lighting considered?
Answer: Life-safety equipment
◉ What should exit signs do?
Answer: Remain illuminated and maintained
◉ What is a relay best described as?
Answer: An electrically operated switch
◉ What can overcurrent result from?
Answer: An overload or a short circuit/fault
◉ What is the main purpose of a circuit breaker?
Answer: To open the circuit during unsafe current
◉ What are signs of a bad switch or outlet?
Answer: Flickering, buzzing, and burning smell
◉ What should be considered if many fixtures in one area are out?
Answer: An upstream circuit or control issue
, ◉ What is the main purpose of emergency generators?
Answer: To power essential loads during outages
◉ What should you think about if many fixtures in one area are out?
Answer: An upstream circuit or control issue
◉ What is commonly used to control motors and larger loads?
Answer: A contactor or starter
◉ What can make non-current-carrying metal parts dangerous?
Answer: Lack of proper bonding
◉ Why is replacing a blown fuse with an oversized one unsafe?
Answer: It defeats circuit protection
◉ What type of protection is more likely needed for a receptacle in a
wet location?
Answer: GFCI protection
◉ What is the general electrical distribution path?
Answer: Service equipment to switchboard to panelboard and
branch circuits
TESTED QUESTIONS WITH FULL SOLUTION
◉ What is the function of a fuse in a circuit?
Answer: To melt open during overcurrent
◉ What is the best action if a breaker keeps tripping?
Answer: Find and correct the cause
◉ What does grounding mainly help with?
Answer: Stabilizing the system and reducing shock hazards
◉ What is bonding in electrical systems?
Answer: Connecting metal parts together so that fault current can
clear safely
◉ What is the main purpose of a GFCI?
Answer: To protect people from ground-fault shock hazards
◉ How should a warm receptacle with scorch marks be treated?
Answer: As a likely overheating or arcing hazard
,◉ What is emergency lighting considered?
Answer: Life-safety equipment
◉ What should exit signs do?
Answer: Remain illuminated and maintained
◉ What is a relay best described as?
Answer: An electrically operated switch
◉ What can overcurrent result from?
Answer: An overload or a short circuit/fault
◉ What is the main purpose of a circuit breaker?
Answer: To open the circuit during unsafe current
◉ What are signs of a bad switch or outlet?
Answer: Flickering, buzzing, and burning smell
◉ What should be considered if many fixtures in one area are out?
Answer: An upstream circuit or control issue
, ◉ What is the main purpose of emergency generators?
Answer: To power essential loads during outages
◉ What should you think about if many fixtures in one area are out?
Answer: An upstream circuit or control issue
◉ What is commonly used to control motors and larger loads?
Answer: A contactor or starter
◉ What can make non-current-carrying metal parts dangerous?
Answer: Lack of proper bonding
◉ Why is replacing a blown fuse with an oversized one unsafe?
Answer: It defeats circuit protection
◉ What type of protection is more likely needed for a receptacle in a
wet location?
Answer: GFCI protection
◉ What is the general electrical distribution path?
Answer: Service equipment to switchboard to panelboard and
branch circuits
