Safety Practices Flashcards
7 cards from real HVAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Practices flashcards as text
What does the term 'arc flash' refer to in the context of HVAC electrical safety?
Answer: An explosive release of energy caused by an electrical fault, producing intense heat and pressure
An arc flash is an electrical explosion that releases intense heat (up to 35,000°F), pressure waves, and molten metal, which can cause severe burns or death.
A technician discovers that a customer's existing refrigerant lines contain R-22. Which statement about handling this refrigerant is CORRECT?
Answer: R-22 must be recovered using EPA Section 608-certified equipment
EPA Section 608 prohibits venting R-22 and requires recovery using certified equipment; R-22 production ended in 2020 but existing supplies must still be properly handled.
When using a nitrogen cylinder for pressure testing, what device MUST be installed between the nitrogen cylinder and the HVAC system?
Answer: A pressure regulator to control output pressure
A pressure regulator must be used with nitrogen cylinders to reduce tank pressure (up to 2,200 PSI) to a safe working pressure for the system being tested.
What is the primary purpose of a ground fault circuit interrupter (GFCI) when used during HVAC service work?
Answer: To protect the technician from electrocution by detecting ground faults as small as 4-6 milliamps
GFCIs detect ground faults as low as 4-6 milliamps and trip within milliseconds, protecting technicians from electrocution when using power tools near HVAC equipment.
Which of the following is a leading cause of injury during HVAC service calls that involves sheet metal work?
Answer: Cuts from sharp sheet metal edges that have not been deburred or protected
Sharp, unfinished sheet metal edges are a primary cause of lacerations during HVAC ductwork installation and service, requiring cut-resistant gloves.
What is the correct way to dispose of a refrigerant cylinder that appears to be empty?
Answer: Render it unusable by removing the valve and marking it empty, then follow local disposal regulations
Cylinders must be rendered unusable (valve removed, marked 'empty') before disposal, as residual pressure in 'empty' cylinders can cause explosion if mishandled.
During a pre-job safety briefing for an HVAC installation requiring work at heights, which topic must be addressed according to OSHA standards?
Answer: Fall hazards, fall protection methods, and proper use of fall protection equipment
OSHA requires that workers be trained on the nature of fall hazards, the correct use of fall protection systems, and the procedures for erecting, maintaining, and dismantling fall protection systems.