Heating & Cooling Inspection AHIT 2024-2025 Edition. All Questions & Answers. Graded A+, Exams of Refrigeration and Air Conditioning

Download Heating & Cooling Inspection AHIT 2024-2025 Edition. All Questions & Answers. Graded A+ and more Exams Refrigeration and Air Conditioning in PDF only on Docsity! The Heating and Cooling Inspection: AHIT 2024-2025 Edition. All Questions & Correct Answers. Graded A+ _______________ are copper tubing that carry refrigerant in both gas and liquid states through a cooling system. A. Compressor lines B. Condenser lines C. Refrigerant lines D. Freon lines - ANSC. Refrigerant lines A gas appliance flue should not be shared with an ____________. Note this as a safety hazard. A. kitchen exhaust B. oil-fired appliance or fireplace C. a gas appliance flue cannot be shared D. sewage vent - ANSB. oil-fired appliance or fireplace A system that heats the home using hot water or steam is called _______. A. a heater B. a boiler C. a furnace D. any of these - ANSB. a boiler 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 - ANSC. a mid-efficiency system An air-conditioning system has four basic components: A. freon distribution system, the compressor, condensate line and an expansion device B. the compressor, refrigerant line, an expansion device and power source C. freon distribution system, condensate line, refrigerant line, power source D. the compressor, a condenser, an evaporator, and an expansion device - ANSD. the compressor, a condenser, an evaporator, and an expansion device An expansion tank in a hot water system ______________. A. provides space for air to expand into B. provides space for water to expand into C. acts as an overflow for water D. acts as an add-on for additional water - ANSB. provides space for water to expand into An oil-fired furnace where the blower is at the bottom of the unit beneath the burner is typically referred to as a _____________. A. lazyboy B. highboy C. lowboy D. tallboy - ANSB. highboy At what pressure would the pressure relief valve open on a forced hot water boiler? A. 2 to 3 psi B. 12 to 15 psi C. 28 to 30 psi D. water in a closed system is not under pressure - ANSC. 28 to 30 psi Besides the thermostat, the main controls on a forced-air furnace are ____________. A. the gas valve and the fan control B. the temperature limit control and the pump control C. the pump control and the evaporator D. the temperature limit control and the fan control - ANSD. the temperature limit control and the fan control Dark staining on the walls above registers of a gravity furnace could be indicative of ___________. A. the absence of balancing dampers B. a defect in the furnace jacket C. a cracked heat exchanger D. the presence of asbestos - ANSC. a cracked heat exchanger Exposed gas lines made of any material other than black iron (steel) must be labeled as gas piping with __________________. A. the type of piping material and date of installation B. a label every 10′ C. yellow or black coating or label every 5′ A. from the drip leg to the gas valve B. from the gas valve to the burners C. from the pilot control valve to the pilot D. from the meter to the turn-off valve above the heating unit - ANSB. from the gas valve to the burners 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 - ANSB. from the gas valve to the burners The operating pressure in a forced hot water system for a typical two-story home should be ________. A. 30 psi B. 25 psi C. 5 psi D. 12 psi - ANSD. 12 psi The outdoor cabinet for the compressor should have at least ________ of clearance on all four sides from foliage, fences, walls or obstructions and ________ above it. A. 2", 2' B. 2', 12-18" C. 12", 4-6' D. There is no set limit - ANSC. 12", 4-6' There should be a _______________ in the line at the gas-fired heating unit so that the gas supply can be turned off, if necessary, for maintenance work or an emergency. A. automatic gas valve/pilot control valve B. high temperature limit valve C. high pressure limit valve D. manual shut-off valve - ANSD. manual shut-off valve Under what conditions should the home inspector not fire up the steam boiler? A. a high water level and a low rust line in the sight gauge B. sparkling water in the sight gauge C. dirty water in the sight gauge D. no water in the sight gauge - ANSD. no water in the sight gauge Under what conditions should the home inspector recommend a cooling system be serviced by a technician? A. if the compressor short cycles B. if the condensate line is leaking C. if there's no exterior disconnect D. all of the answers shown - ANSD. all of the answers shown Under what conditions should the home inspector turn off the steam boiler immediately? A. pressure at 15 psi or more B. rapidly fluctuating water level C. evidence of a cracked heat exchanger D. improper relief valve extension - ANSA. pressure at 15 psi or more Upon a call for heat for the thermostat, which components of a newer hydronic boiler are activated simultaneously? A. the circulating pump and the low water cutoff B. the circulating pump and the pressure relief valve C. the burner and the circulating pump D. the burner and the limit control - ANSC. the burner and the circulating pump What "type" gas lines are acceptable? A. Type K only B. Type M only C. Type K and Type L D. Type L only - ANSC. Type K and Type L What air conditioning system component removes heat from the pressurized gas and changes the refrigerant to a liquid? A. the compressor B. the condenser C. the evaporator D. the expansion device - ANSB. the condenser What air-conditioning component functions to put refrigerant gas under a high pressure? A. the compressor B. the evaporator C. the expansion device D. the condenser - ANSA. the compressor What condition can be an indication of a defective heat exchanger in a boiler? A. water seepage into the burner area B. rusting in the burner area C. corrosion in the burner area D. all of the answers shown - ANSD. all of the answers shown 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 - ANSB. lack of combustion air What condition may be indicated if there is ice buildup on the evaporator coils? A. too much air flow through the coil and/or too much refrigerant B. not enough air flow through the coil and/or low refrigerant level C. loose mountings on the air handler D. a missing auxiliary drain line - ANSB. not enough air flow through the coil and/or low refrigerant level What condition on a hydronic boiler may cause the pressure relief valve to discharge whenever the boiler is on? A. a missing relief valve extension B. an open expansion tank in the attic C. a leak in the return piping D. a waterlogged expansion tank - ANSD. a waterlogged expansion tank What condition should the home inspector suspect if there is a loud banging or knocking just after the steam boiler fires? A. the pipes are not properly sloped B. the Hartford loop is malfunctioning C. the water contains rust and mud D. the limit control is faulty - ANSA. the pipes are not properly sloped 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 - ANSA. spillage from the draft diverter, blocked flue What device on a heat pump allows it to operate in either a cooling or heating mode? 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 - ANSA. it turns off the burners if the furnace hits a preset high temperature What is the purpose of the high limit control on a forced warm air furnace? A. it turns on the fan when the furnace hits a preset high temperature B. it heats the air C. it turns off the burners if the furnace hits a preset high temperature D. it turns off the fan when the furnace reaches a preset low temperature - ANSC. it turns off the burners if the furnace hits a preset high temperature What is the purpose of the limit control on a hydronic boiler? A. to turn off the burners if temperatures exceed 200 degrees B. to shut off the burners if the water level is too low C. to add water if pressures fall below 12 psi D. to discharge water if pressures reach 30 psi - ANSA. to turn off the burners if temperatures exceed 200 degrees What is the purpose of waiting 5 minutes before relighting a pilot that has gone out during the inspection? A. to go get a cold beer B. to allow gasses to dissipate and become diluted C. to prevent over-cycling D. to give the unit a chance to cool down before putting your hands near the pilot - ANSB. to allow gasses to dissipate and become diluted What pattern flame would NOT necessarily cause CO production? A. dancing flames B. fluctuating flames C. floating flames D. flashback - ANSB. fluctuating flames 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 - ANSD. report it as a major repair What sign appearing just after a forced hot water system is fired indicates a waterlogged expansion tank? A. pressure builds up quickly and the pressure relief valve discharges B. the electrical connections begin arcing C. the circulating pump begins leaking D. water begins dripping into the burner area - ANSA. pressure builds up quickly and the pressure relief valve discharges What situation at the gas burner should case the inspector to suspect a faulty heat exchanger? A. a red tag on the gas line to the burner B. flames roaring or dancing on the burners C. rusting, flaking, and corrosion in the burner area D. a faulty thermocouple - ANSC. rusting, flaking, and corrosion in the burner area What type of air conditioner is the home inspector typically NOT required to inspect? A. air-cooled central air-conditioning B. window air conditioners C. heat pumps D. water-cooled central air-conditioning - ANSB. window air conditioners 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 - ANSA. oil-fired What would not be considered a major defect in an octopus furnace? A. asbestos-like wrap B. a cracked heat exchanger C. lack of return ducts D. missing blower unit - ANSD. missing blower unit When inspecting a heat pump, the home inspector should _____________. A. test it in both modes B. test it in the heating mode if the temperature is over 75 degrees C. test it in the cooling mode if the temperature is over 60 degrees D. test it in the cooling mode if the temperature is under 60 degrees - ANSC. test it in the cooling mode if the temperature is over 60 degrees 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 - ANSD. operate heating systems when conditions may cause equipment damage When reporting on the inspection of a heat pump, in what section must the information include? A. heating system section B. neither the air-conditioning system section nor heating system section C. both the air-conditioning system section and the heating system section D. air-conditioning system section - ANSC. both the air-conditioning system section and the heating system section When should a Hartford Loop be present in a boiler system? A. a Hartford Loop must always be present B. when there is a Wet Return C. when there is a Dry Return D. a Hartford Loop does not have to be present - ANSB. when there is a Wet Return When should an inspector NOT operate the cooling equipment? A. if they suspect a freon leak B. if the outside temperature is less than 60° C. if there is a crack anywhere on the housing D. if the return registers are dirty - ANSB. if the outside temperature is less than 60° 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 - ANSB. when the furnace or boiler is fired When should the home inspector turn the air conditioner off immediately? A. if the condenser fan goes on with the compressor B. if it starts to rain C. if the condensate tray is rusted D. if the compressor groans or squeals - ANSD. if the compressor groans or squeals Where will the oil filter be located in the oil supply line?