Which of the following statements about non-circulating hot water systems is true?
a. The systems cause large amounts of water to be wasted before hot water is available at the fixtures
b. The systems are used in large residential buildings
c. The systems eliminate hot water stagnation
d. The systems provide immediate hot water to all fixtures without the need of a pump
e. The systems have a return line
Answer: A
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Power Engineering Chapter 111
- Which of the following statements about pressure relief valves is false?
- In a circulating hot water system the municipal distribution systems and/or local storage tanks are used for which of the following reasons.
- Which of the following is not an element found in a circulating hot water system?
- Which of the following statements about a constant pressure water system that has a pneumatic tank is false?
- Building codes recommend that nowhere in a building plumbing system should the water pressure fall below:
- When the maximum building demand for water is always less than the maximum flow available from a municipal or local distribution system which of the following systems can be used?
- The building water system that has a storage tank above the highest fixture in the system is called:
- Temperature relief devices are effective in protecting domestic hot water systems from which of the following problems?
- Most municipal water distribution systems operate at pressures between:
- Temperature relief devices limit the temperature in domestic hot water systems to no more than:
- In a domestic circulating hot water system, automatic air vents serve to:
- Building codes generally limit the highest pressure permissible in plumbing systems to:
- Which of the following statements about a pressure relief valve in a building hot water system is false?
- The back flow prevention method consisting of two independent check valves with an automatic operating pressure differential relief valve located between them is called:
- Most building regulations prohibit single pipe systems over ________ in length from a hot water heater or hot water recirculating line.