The Heating and Cooling Inspection AHIT Exam Questions and Answers

The Heating and Cooling Inspection AHIT Exam Questions and Answers When inspecting the heating equipment, the inspector is not required to _________. A. operate the system using normal operating controls B. open readily openable access panels provided by the manufacturer C. observe automatic safety controls D. operate heating systems when conditions may cause equipment damage - Answer-D. operate heating systems when conditions may cause equipment damage What should an inspector do if they find a cracked heat exchanger? A. turn off the furnace immediately B. sell the customer a new furnace C. tell the customer it will probably last 5 more years D. report it as a major repair - Answer-D. report it as a major repair Which of the following is NOT part of the heating inspection? A. humidifiers B. combustion product and disposal system C. heating equipment D. old steam boilers - Answer-A. humidifiers When should the home inspector have the customer stand back for safety's sake? A. when the safety switch is tested B. when the furnace or boiler is fired C. when the venting is inspected D. when the thermostat is manipulated - Answer-B. when the furnace or boiler is fired If a heating system appears to be improperly vented after the home inspector fires it, the inspector should ____________. A. repair the venting issue and proceed B. investigate the cause of improper venting C. turn off the system promptly D. ask the owner to inspect the venting - Answer-C. turn off the system promptly Why should a furnace not be operated? A. too much aluminum foil present to properly inspect it B. improper venting C. rusted ductwork D. a masonry chimney - Answer-B. improper venting What is overshooting? A. a condition where a house is heated higher than the thermostat is set for B. a condition where the thermostat is not level, causing incorrect temperature readings C. a condition where different zones of a house are controlled by different thermostats D. a condition where the heating system turns on and off too frequently - Answer-A. a condition where a house is heated higher than the thermostat is set for What type of central heating system is always required to have a remote safety switch? A. oil-fired B. electric furnace C. gas-fired D. heat pump - Answer-A. oil-fired An 80% efficiency rating for a gas-fired heating system would best describe ___________. A. a conventional system B. a high-efficiency system C. a mid-efficiency system D. a middle of the road system - Answer-C. a mid-efficiency system The gas manifold in a gas-fired heating system delivers gas ___________. A. from the meter to the turn-off valve above the heating unit B. from the gas valve to the burners C. from the pilot control valve to the pilot D. from the drip leg to the gas valve - Answer-B. from the gas valve to the burners What is the purpose of the high limit control on a forced warm air furnace? A. it turns off the burners if the furnace hits a preset high temperature B. it turns off the fan when the furnace reaches a preset low temperature C. it heats the air D. it turns on the fan when the furnace hits a preset high temperature - Answer-A. it turns off the burners if the furnace hits a preset high temperature What is a thermocouple? A. a combination control containing the gas valve and pilot valve B. a device that senses whether the pilot is lighted and controls the flow of gas to the burners C. an automatic valve that starts and stops the flow of gas to the burners D. a glow coil or electric spark that is energized by the thermostat to ignite the gas - Answer-B. a device that senses whether the pilot is lighted and controls the flow of gas to the burners What is NOTa function of the automatic gas valve on a gas burner? A. to respond to the limit control to stop gas flow to the burners during a malfunction B. to respond to the thermostat to start and stop gas flow to the burners C. to meter the gas stream for volume and pressure to the burners D. to sense whether the pilot is lighted - Answer-D. to sense whether the pilot is lighted What condition is usually the cause of yellow-tipped flames in a gas heating unit? A. gas/air mixture flow velocity greater than the burn rate B. lack of combustion air C. gas/air mixture flow velocity less than the burn rate D. lack of draft air - Answer-B. lack of combustion air What pattern flame would NOT necessarily cause CO production? A. dancing flames B. fluctuating flames C. floating flames D. flashback - Answer-B. fluctuating flames What function does the draft hood or draft diverter play in a heating unit? A. it protects the unit from updrafts B. it delivers draft air to the unit C. it allows CO to escape into the home before passing up the flue D. it provides combustion air for the unit - Answer-A. it protects the unit from updrafts What conditions of a gas furnace should all be reported as safety hazards? A. spillage from the draft diverter, blocked flue B. flashback, dirty burners C. spillage from the draft diverter, use of a metal chimney D. blocked flue, dirty burners - Answer-A. spillage from the draft diverter, blocked flue What does a red tag on the gas line at the heating u