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1 Which type of air ducts are the most efficient?
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2 In an air-conditioning circuit what is the black wire?
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3 If the ducts are in concrete, what is the proper type of furnace?
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4 A 60,000 BTU cooling unit has how many tons of cooling capacity?
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5 How much does 1 gallon of water weigh?
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6 How many watts equal 1 horsepower?
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7 Which of the following is the best insulation?
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8 On an A/C system, the return should be _____________.
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9 Where are cap and bottom flashing used?
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10 What type of fitting would you use to join two pipes of different sizes?
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11 What is the proper way to connect to galvanized iron pipe to copper?
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12 What is the resistance of the circuit with 110 volts and 22 amps?
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13 What is the hardest type of copper?
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14 When mounting solar collectors on the ground you should _________________.
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15 Solar systems typically use what type of thermostat?
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16 What should be the primary concern in designing a solar unit?
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17 Efficient collectors will typically heat how many gallons, per square foot, per day?
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18 What device is recommended on the outlet side of a collector to handle expansion and boiling?
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19 For a siphon to be effective, it should be a minimum of _____ inches from the drain to the siphon.
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20 In a collector, the surface that retains the solar radiation and converts it to heat energy is called the ______________.
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