Solar Contractors License Exam Practice Test

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

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

a. Gravity

b. Upflow Lowboy

c. Upflow Highboy

d. Downflow

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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

Incorrect. Please choose another answer.

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

Incorrect. Please choose another answer.

13 What is the hardest type of copper?

a. K

b. L

c. M

d. DWV

Incorrect. Please choose another answer.

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

Incorrect. Please choose another answer.

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.