Solar Contractors License Exam Practice Test

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1 Which type of air ducts are the most efficient?

a. Half Round

b. Square

c. Round

d. Rectangular

Incorrect. Please choose another answer.

2 In an air-conditioning circuit what is the black wire?

a. Neutral

b. Power

c. Ground

d. Secondary

Incorrect. Please choose another answer.

3 If the ducts are in concrete, what is the proper type of furnace?

a. Gravity

b. Upflow Lowboy

c. Upflow Highboy

d. Downflow

Incorrect. Please choose another answer.

4 A 60,000 BTU cooling unit has how many tons of cooling capacity?

a. 3 Tons

b. 5 Tons

c. 6 Tons

d. 20 Tons

Incorrect. Please choose another answer.

5 How much does 1 gallon of water weigh?

a. 1.25 pound

b. 4.33 pounds

c. 8.33 pounds

d. 10.25 pounds

Incorrect. Please choose another answer.

6 How many watts equal 1 horsepower?

a. 746 Watts

b. 648 Watts

c. 480 Watts

d. 100 Watts

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7 Which of the following is the best insulation?

a. Aluminum

b. Styrofoam

c. Blanket

d. Batted

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8 On an A/C system, the return should be _____________.

a. Vented near the unit

b. Vented outside

c. Near the thermostat

d. On an outside wall

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9 Where are cap and bottom flashing used?

a. Ridge

b. Hip

c. Chimney

d. Valley

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10 What type of fitting would you use to join two pipes of different sizes?

a. Nipple

b. Elbow

c. Coupling

d. Bell reducer

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11 What is the proper way to connect to galvanized iron pipe to copper?

a. Copper soldered joint

b. Galvanized steel union

c. Brass connector

d. Weld

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12 What is the resistance of the circuit with 110 volts and 22 amps?

a. 2 ohms

b. 5 ohms

c. 224 ohms

d. 280 ohms

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13 What is the hardest type of copper?

a. K

b. L

c. M

d. DWV

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14 When mounting solar collectors on the ground you should _________________.

a. Fix at a 30° tilt

b. Face true West

c. Protect from wind

d. Place on a concrete pad

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15 Solar systems typically use what type of thermostat?

a. Single phase

b. Dual phase

c. Differential

d. Zone

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16 What should be the primary concern in designing a solar unit?

a. Efficiency

b. BTU requirements

c. Storage tank capacity

d. All of the above

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17 Efficient collectors will typically heat how many gallons, per square foot, per day?

a. 1 to 2 gallons

b. 2 to 4 gallons

c. 3 to 4 gallons

d. 5 to 6 gallons

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18 What device is recommended on the outlet side of a collector to handle expansion and boiling?

a. Pressure tank

b. Vent

c. Check Valve

d. Pressure valve

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19 For a siphon to be effective, it should be a minimum of _____ inches from the drain to the siphon.

a. 4 inches

b. 6 inches

c. 8 inches

d. 12 inches

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20 In a collector, the surface that retains the solar radiation and converts it to heat energy is called the ______________.

a. Plate

b. Absorbe

c. Exchanger

d. Radiator

Incorrect. Please choose another answer.