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11 Cards in this Set
- Front
- Back
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What fired heater does not require a storage tank? a) instantaneous water heater b) single flue water heater c) indirect heater d) radiant water heater e) convection water heater |
a) instantaneous water heater |
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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) a fire recoil element |
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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) flashing of water into steam when faucets are opened |
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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) the systems force large amounts of water to be wasted before hot water is available in each fixture |
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The building water 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 sucton tank c) tankless constant pressure system d) a downfeed system e) a direct pressure system |
d) a downfeed system |
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What is used to increase flue gas heat transfer efficiency in a direct hot water heater? a) an induced draft fan b) insulation jacket around tank c) spiral baffle d) butterfly backflow valve e) internal flue baffle |
c) spiral baffle |
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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 |
d) both cold water and heater water supply |
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What backflow device has a moving element that prevents water from spilling during flow? a) pressure vacuum breaker b) double check valve c) atmospheric vacuum breaker d) pressure relief valve e) air gap |
c) atmospheric vacuum breaker |
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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) this system is primarily used in larger buildings |
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What regulates the flow of heating steam in an indirect hot water heater? a) dynamic flow steam trap b) thermostatic bulb with capillary tube c) baffles d) thermostatically controlled steam valve e) thermostatically controlled condensate return valve |
d) thermostatically controlled steam valve |
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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) a tankless constant pressure system d) a downfeed system e) a gravity system |
c) a tankless constant pressure system |
