Chapter 4 Water Supp Word Scramble

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Question	Answer
Hot water is water to which heat ?	Heat energy has been added
Domestic Hot water Temp should be between?	105F and 140 F
When water is heated it?	Expands and volume decrease?
Temperature and pressure relief valve	A dual type safety valve
As water is heated it immediately starts to____	expand
A thermal expansion tank features a _____ air cushion ___ to the minimum system pressure before recovery starts	sealed, precharged
The volume of hot water supply is governed by recovery rate of hot water heater	True
Specific heat is the amount of of heat required to raise temperature of 1lb of a substance____	1F
The definition of specific heat indicates you must know the _______ of the water to be heated.	weight
Water can be heated using _____ and ___	Direct and Indirect
whats Four direct methods for heating domestic hot water?	Gas,, Oil, Electricity, Instantaneous
Point of use heaters are small fixture____ type water heaters	under storage
Heat is a form of_____ that produces work or motion	Energy
What s convection associated with?	Liquid and Vapors
Water weight is 8.33LB	True
Gas fired heaters have____ burners forced draft burners_____ burners	atmospheric and condensing
Heating elements in electric water heaters are available in variety of____ and ___	Voltages and Wattages
What is most common lining applied to interior of water heater tanks made out of?	Glass
Magnesium ___ are used used to protect the interior surfaces of a steel tank	Anode
Domestic Hot Water supply systems can be best classified by the type of service they perform, that is one temperature and____ multiple	multiple
Forced____ requires the use of a circulating or booster pump	circulation
What are check valves?	They are used to prevent backflow and back pressure in hot water supply
Expansion of water in a hot water supply system also causes the pipe which carries the water to expand as as heat is _______	Transferred
Mechanical_______ joints or _____ joints can be used to absorb expansion in a hot water supply.	Expansion joints or Swing joints
Food service applications are most common examples of_____ temperature hot water supply systems.	multiple
Whats the minimum temperature needed for commercial dishwater sanitizing rinse is	180F
What are the major parts of hot water supply system?	Mains, Risers, Major Branch, Minor Branch, Circulating Lines, Terminal Points
One temperature systems are often called______	Recovery systems
Food service applications are most common examples of_____ temperature hot water supply systems.	multiple
Gravity circulation is more important than forced circulation?	False
A____ control valve is used in a hydronic heating system to prevent circulation of hot water when hot boiler water is not need.	Flow
The horziontal pipe between an ATFL fitting must pitch up at least ______	1"
What must be used if a dip tube cant be used	in line air seperator
Centrifugal pumps can be install where?	supply and return piping
How is a electronic zone valve operated?	It is electronically operated
A closed hot water heating system holds a solid fill of water in the?	a) expansion tank b)boiler,piping, radiation c)flow valve D)circulating pump
All piping in a hot water system must be ____ so that air in system can be____ into the expansion tank or from manual air vents	pitch, vented
Which fittings should be used when changing size of horizontal runs of pipe	eccentric fittings
A draft hood must be attached directly to a gas	fire water heater
An immersion type aquastat device does what?	Sense the temperature of water being heated
The basic deigns of water heaters are intended for use with?	Internal Immersion and External Immersion
How can the affects of hard water in domestic hot water heating equipment be minimized?	Lower water temperature and controlling flow
What are 6 valves in hot water system?	Check, ball,globe,butterfly,balance
What two valves are isolation valves?	Balls valves and gate valves
What is a heat exchanger?
Water at ____ can scald in just half a second	150F
___ valve is used for throttling and shut off purpose	Globe valve
Balance valves are used for what?	To balance or equalize circulation
What are butterfly valves used for?	Balancing valves and isolate section of piping system
Pressure relief valve are set to relief system if pressure exceeds____	30 PSIG

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