Principles of Electrical and Refrigeration Theory
1. | What is the symbol for impedance? | ||
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2. | The safety ground conductor for A/C circuit is usually color coded _________. | ||
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Air Conditioning
3. | Heat which causes a change in temperature of a substance is called: | ||
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4. | What is heat, which causes a change in the state of a material without a change in temperature, called? | ||
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Commercial Air Conditioning
5. | What is a sling psychrometer used to measure? | ||
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6. | A compressor is operating with a discharge pressure of 235.3 psig and a suction pressure of 35.3 psig. What is the compression ratio (pumping ratio)? | ||
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Commercial Refrigeration
7. | In a (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: | ||
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8. | An thermal expansion valve that is stuck wide open will cause ___________. | ||
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Heat Pump Service
9. | What is the major difference between a heat pump and an air conditioner? | ||
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10. | What device controls the supplementary electric heat according to the outdoor temperature? | ||
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Heat Pump Installation
11. | Which of the following is not a factor that should be considered when installing an outdoor unit? | ||
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12. | What is the minimum clearance for access panels on an outdoor condensing unit? | ||
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Gas, Oil and Combustion
13. | One BTU is the amount of heat required to raise the temperature of: | ||
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14. | What is the primary composition of natural gas? | ||
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Electric Heat
15. | The electric heat element is usually made of what material? | ||
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16. | Which of the following is an example of a resistive load? | ||
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Residential Heat Load Calculation
17. | An oversized heating and cooling system can cause which of the following? | ||
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18. | When the temperatures of a structure both inside and outside are equal, there is _____. | ||
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Low-GWP Refrigerant Safety and Training
19. | Polyolester (POE) oils stored in plastic containers will _______. | ||
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20. | R-407C has _______-. | ||
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Green Awareness
21. | What is a carbon footprint? | ||
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22. | What is energy management? | ||
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