Inspector Practice Exam - Mechanical

The difference between a conventional vs. high efficiency HVAC unit is: a. Blower b. Secondary Reversing Valve c. Gas source d. Heat exchanger {Ans: Heat exchanger}A gas water heater is replaced by an electric water heater: a. A homeowner shouldn't do the replacement themselves b. Be sure the breaker box is the correct size c. Cap off the gas line {Ans: Be sure the breaker box is the correct size}What shuts off the burners on a gas furnace when the output temperature is excessive? a. Limit Switch b. Activator Switch c. Thermometer d. Shut off Valve {Ans: Limit Switch}If you have a gas water heater, from what area can you get return air to burn? a. Bedroom b. Bathroom c. Kitchen d. Closet {Ans: Closet}Bathrooms must have an aggregate glazed area of at least _____square feet? a. 3' b. 5' c. 4' d. 3 1/2 ' {Ans: 3'}Unless modified by the manufacturer's installation instructions or determined by engineering circulation, what is the maximum permitted length of a clothes dryer exhaust duct that has one 90-degree bend and two 45-degree bends? a. 15 feet b. 20 feet c. 17 ½ feet d. 25 feet {Ans: