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10 Cards in this Set
- Front
- Back
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Which of the following statements about a constant pressure system with Pneumatic Tank is false?
a) Water entering directly into the pump suction is discharged into pressurized tank. b) This system is primarily used in larger buildings. c) A system controller automatically starts a standby pump in the event of pump failure. d) The system has a pressure regulator to maintain a relatively constant pressure above the water level inside the tank. e) Air must continuously be introduced into the tank. |
B
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The system which has a storage tank above the highest fixture in the system is called a) an upfeed system b) a constant pressure system with suction tank c) a tankless constant pressure system d) a downfeed system e) a direct pressure system |
D
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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? a) A constant pressure system with suction tank b) A constant pressure system with pneumatic tank c) Tankless constant pressure system d) A downfeed system e) A gravity system |
C
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Which of the following statements about Non-Circulating hot water systems is true? a) The systems have a return line. b) The systems are used in large residential buildings. c) The systems eliminate hot water stagnation. d) The systems contain a differential fire recoil element. e) The systems force large amounts of water to be wasted before hot water is available in each fixture. |
E
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Which of the following is not an element found in a circulating hot water system? a) A fire recoil element b) Air vents c) Heaters d) Back flow valves e) Return Piping |
A
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In a circulating hot water system the municipal distribution systems and/or local storage tanks are used for which of the following reasons. a) Cold water supply only b) Water supply to heaters only c) Hot water supply from municipal heating stations d) Both cold water and heater water supply e) Water meter rationing |
B
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In a circulating hot water system automatic air vents serve which of the following functions? a) They cool the water in the storage tank to increase the temperature differential to increase circulation. b) They remove air that is released when water is heated. c) They supply air to cooling water in the storage tank. d) They are required for adequate water aeration. e) None of the above. |
B
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The backflow prevention method which consists of two independently acting check valves with an automatic operating pressure differential relief valve located between the two check valves is called a) air gap backflow prevention b) double check valve c) reduced pressure principal device d) atmosphere vacuum breaker e) PVB |
C
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Which of the following statements about pressure relief valves is false? a) The valve may be installed anywhere in the hot water system close to the heater or tank. b) The valve must be directly connected to a drain or vent pipe. c) The valve is opened by pressure in the line surpassing a preset pressure set on the spring in the valve. d) The valve is automatically closed when the water line pressure drops below the spring pressure setting. e) None of the above. |
B
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Temperature relief devices are effective in eliminating the following problem: a) scale build-up in the system b) flashing of water into steam when faucets are opened c) venting off air released from water during heating d) inadequate heating of the water e) water stagnation |
B
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