Self-Test B-2.1 Heating and Cooling Sources

Complete Self-Test B-2.1 and check your answers.

1. Why would the area of a boiler’s water chamber be increased?
   1. Withstand greater pressures
   2. Withstand higher temperatures
   3. Heat the water more quickly and efficiently
   4. Heat the water more evenly

    

2. What are large water-tube boilers normally used for?
   1. Producing high-pressure steam in large volumes
   2. Producing low-pressure steam in large volumes
   3. Producing steam in small volumes
   4. Space heating with water or steam

    

3. What are fire-tube boilers well suited for?
   1. Hot water heating only
   2. Steam heating only
   3. Forced-air, hot water heating, or steam heating
   4. Hot water heating or steam heating

    

4. How are sections of a cast-iron boiler connected together?
   1. Supply and return headers
   2. Couplings
   3. Push rods
   4. Push nipples

    

5. Low-pressure steam boilers can reach temperatures of 135°C (275°F).
   1. True
   2. False

    

6. At what temperature do conventional non-condensing boilers in hot water heating systems usually operate?
   1. 82°C (180°F)
   2. 121°C (250°F)
   3. 140°C (284°F)
   4. 160°C (320°F)

    

7. What are high-pressure boilers usually made of?
   1. Cast iron
   2. Vitrified porcelain
   3. Stainless steel
   4. Steel tube

    

8. What type of boiler were the original “package” boilers?
   1. Water tube
   2. Fire tube
   3. Cast iron
   4. Modular

    

9. What makes a condensing boiler different from a conventional (non-condensing) boiler?
   1. Achieves over 90% efficiency
   2. Accepts cooler return water
   3. Has stainless steel or titanium internal components
   4. All of the above

    

10. Complete the following statement: “High-efficiency boilers require________.”
    1. More maintenance
    2. An occupancy permit
    3. A floor drain
    4. Vents made of steel pipe

     

11. Complete the following statement: “A ground source heat pump is a type of _________.”
    1. Control system
    2. Well pump
    3. Heat exchanger
    4. Piston pump

     

12. How does a ground source heat pump system heat a building?
    1. Generates heat from the ground
    2. Generates heat by the movement of a coolant
    3. Transfers residual heat from the ground
    4. Transfers residual heat from the building

     

13. Which type of active solar heating system would work well in colder climates?
    1. Direct system
    2. Closed loop
    3. Indirect system
    4. Drainback system

     

14. What type of collector is typically used for most residential and commercial building applications that require temperatures below 93°C (200°F)?
    1. Flat-plate or transpired-air collectors
    2. Evacuated-tube or concentrating collectors
    3. Flat-plate or concentrating collectors
    4. Evacuated-tube or transpired-air collectors

     

Answer Key: Self-Test B-2.1 is on the next page.