Chapter 111- Building Water Supply System Flashcards
In a circulating hot water system, automatic air vents serve one of the following functions
They remove air that is released when water is heated
Temperature relief devices are effective in eliminating the following problem
Flashing of water into steam when faucets are open
The back flow prevention method which consists of two independently acting check valves with an automatically operating pressure differential relief valve located between the two check valves is called
Reduced pressure principle device
The system which has a storage tank above the highest fixture n the system is called a
Down feed system
When the maximum building demand for water is always less than the maximum flow available from a municipal or local distribution system, which system is used
Tankless constant pressure system
Which of the following is not an element found in a circulating hot water system
A fire recoil element
Which of the following statements about a constant pressure system with pneumatic tank is false
This system is primarily used in larger buildings
Non-circulating hot water system
Waste large amounts of heat before each fixture
Three facts about pressure relief valves
The valve may be located anywhere in the system close to the heater or tank
The valve is opened by pressure in the line surpassing a preset pressure set on the spring in the valve
The valve is automatically closed when the water line pressure drops below the spring pressure setting
In the case of taller buildings, where the pressure from the city mains is not sufficient to provide an adequate water supply to the top floors, water is supplied by
A down feed system
The building supply tank on a down feed water distribution system is also know as the
House tank
In large buildings, or in long low buildings which do not have enough height to produce good circulation, the hot water circulation can be improved by using a
Circulating pump
Heaters which heat water from burning fuel or by an electric element are:
Direct heaters
An indirect heater is one in which water is heated by
Steam or high temperature water
In a circulating hot water system the municipal distribution systems and local cold storage tanks are used for which of the following reasons
Both cold water and heating water supply
