NYC CUSTODIAN ENGINEER ACTUAL TEST
PAPER COMPLETE QUESTIONS AND
SOLUTIONS TESTED ANSWERS
◉ 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
◉ What does bonding connect metal parts together for?
Answer: So that fault current can clear safely
◉ If a breaker keeps tripping, what is the best action to take?
Answer: Find and correct the cause
,◉ What is a GFCI mainly intended to protect people from?
Answer: Ground-fault shock hazards
◉ What is HVAC an acronym for?
Answer: Heating Ventilation and Air Conditioning
◉ What does ventilation primarily help with?
Answer: Bringing in outdoor air and removing stale air
◉ What does a dirty filter commonly cause?
Answer: Reduced airflow
◉ What does an air-handling unit commonly contain?
Answer: A fan, filters, coils, and dampers
◉ What is a likely cause if a classroom is stuffy but the fan is
running?
Answer: A closed outside-air damper
◉ What is the main job of the thermostat?
Answer: To call for heating or cooling based on room conditions
, ◉ What should you suspect if a unit runs but there is little airflow?
Answer: A dirty filter or fan problem
◉ What is the purpose of a heating coil in an HVAC system?
Answer: To add heat to the air stream
◉ Why does cooling performance often drop when airflow is poor?
Answer: Air movement is essential to deliver heating or cooling
◉ When may a room need to be removed from occupancy in school
buildings?
Answer: If the ventilation does not operate as designed
◉ What does a filter help protect?
Answer: Indoor air quality and equipment such as coils
◉ What does a damper commonly regulate?
Answer: Airflow
◉ What is the purpose of an exhaust fan?
Answer: To remove stale or contaminated air
PAPER COMPLETE QUESTIONS AND
SOLUTIONS TESTED ANSWERS
◉ 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
◉ What does bonding connect metal parts together for?
Answer: So that fault current can clear safely
◉ If a breaker keeps tripping, what is the best action to take?
Answer: Find and correct the cause
,◉ What is a GFCI mainly intended to protect people from?
Answer: Ground-fault shock hazards
◉ What is HVAC an acronym for?
Answer: Heating Ventilation and Air Conditioning
◉ What does ventilation primarily help with?
Answer: Bringing in outdoor air and removing stale air
◉ What does a dirty filter commonly cause?
Answer: Reduced airflow
◉ What does an air-handling unit commonly contain?
Answer: A fan, filters, coils, and dampers
◉ What is a likely cause if a classroom is stuffy but the fan is
running?
Answer: A closed outside-air damper
◉ What is the main job of the thermostat?
Answer: To call for heating or cooling based on room conditions
, ◉ What should you suspect if a unit runs but there is little airflow?
Answer: A dirty filter or fan problem
◉ What is the purpose of a heating coil in an HVAC system?
Answer: To add heat to the air stream
◉ Why does cooling performance often drop when airflow is poor?
Answer: Air movement is essential to deliver heating or cooling
◉ When may a room need to be removed from occupancy in school
buildings?
Answer: If the ventilation does not operate as designed
◉ What does a filter help protect?
Answer: Indoor air quality and equipment such as coils
◉ What does a damper commonly regulate?
Answer: Airflow
◉ What is the purpose of an exhaust fan?
Answer: To remove stale or contaminated air
