1. For an evaporator to operate at peak efficiency, _____.

2. Which of the following metering devices responds to changes in the superheat of the refrigerant vapor leaving the evaporator?

3. Subcooling occurs _____.

4. In a refrigeration system, the high-pressure, high-temperature vapor is converted into a high pressure, high-temperature liquid by the _____.

5. To close a control circuit and start a system, a remote-bulb thermostat depends on a _____.

6. A device used to prevent the reverse flow of a liquid is a ______.

7. The construction and labeling of refrigerant containers is governed by _____.

8. Which of the following statements about refrigerant mixtures is correct?

9. Which of the following control devices is often used in both a primary and a secondary control role?

10. A ton of refrigeration is equal to _____.