Hydronic Heating And Cooling Ch 1-5

Front 1

In what three ways does the human body lose heat?

Back 1

evaporation ,
convection
radiation

Front 2

Comfort is ________?

Back 2

comfort is when the human body feels neither warm nor cool

Front 3

Snow melting is an added feature to a hydronic system T/F

Back 3

True

Front 4

comfort is achieved by heating the body T/F

Back 4

false, comfort is achieved by controlling the rate and manner in which heat is lost from the body

Front 5

Radiant heat is not comfortable heat.T/F

Back 5

False, radiant heat is a comfortable heat... convection heat is not comfortable.

Front 6

Hydronic heating systems CAN provide different temperatures in various portions of a home.T/F

Back 6

True

Front 7

A Hydronic heating system CAN be used to heat domestic water T/F

Back 7

True

Front 8

A snow melting system CAN be provided by a hydronic system T/F

Back 8

True

Front 9

Excess moisture in a home is harmful to building construction T/F

Back 9

True

Front 10

The size of a compression tank in a hydronic system is NOT critical T/F

Back 10

False, inadequate room for expansion defeats economy.

Front 11

Snow melting is an added feature to a hydronic system T/F

Back 11

True

Front 12

comfort is achieved by heating the body T/F

Back 12

false, comfort is achieved by controlling the rate and manner in which heat is lost from the body

Front 13

Radiant heat is not comfortable heat.T/F

Back 13

False, radiant heat is a comfortable heat... convection heat is not comfortable.

Front 14

Comfort is ________?

Back 14

comfort is when the human body feels neither warm nor cool

Front 15

Radiant heat is not comfortable heat.T/F

Back 15

False, radiant heat is a comfortable heat... convection heat is not comfortable.

Front 16

A Hydronic heating system can be used to heat domestic water.T/F

Back 16

True

Front 17

A compression tank is not necessary in a system if a pressure reducing valve is used T/F

Back 17

False, compression tank and PRV serve separate functions and must both be used.

Front 18

All closed hot water heating systems should have both a Pressure reducing valve and a relief valve.T/F

Back 18

True

Front 19

Relief Valves installed on residential hydronic systems are factory set to relieve water or steam if the systems pressure exceeds 30 psig T/F

Back 19

True

Front 20

It IS necessary to install flow-control valves if a hot water heating boiler is equipped with a heater for domestic water T/F

Back 20

True

Front 21

The difference in weight of water in the supply and return mains will create circulation in a gravity hot water heating system T/F

Back 21

True

Front 22

The heat emission rate of gravity system is 150-165 BTUH per square foot of radiation T/F

Back 22

True

Front 23

Two advantages of using higher temperature heating system are a smaller size radiation unit and a smaller size pipe.T/F

Back 23

True

Front 24

A closed hydronic heating system allows you to have higher water temperatures than in open gravity systems.T/F

Back 24

True

Front 25

Water temperatures in a closed hydronic heating system DO NOT affect the sizes of radiation piping. T/F .

Back 25

False,

Front 26

All closed hot water heating systems should have both a Pressure reducing valve and a relief valve.T/F

Back 26

True

Front 27

A closed hydronic heating system allows you to have higher water temperatures than in open gravity systems.T/F

Back 27

True

Front 28

Water temperatures in a closed hydronic heating system DO NOT affect the sizes of radiation piping. T/F .

Back 28

False,

Front 29

A compression tank is not necessary in a system if a pressure reducing valve is used T/F

Back 29

False, compression tank and PRV serve separate functions and must both be used.

Front 30

You should NOT plug a relief valve if it continues to drip T/F

Back 30

True , it should be replaced

Front 31

All closed hot water heating systems should have both a Pressure reducing valve and a relief valve.T/F

Back 31

True

Front 32

Relief Valves installed on residential hydronic systems are factory set to relieve water or steam if the systems pressure exceeds 30 psig T/F

Back 32

True

Front 33

It IS necessary to install flow-control valves if a hot water heating boiler is equipped with a heater for domestic water T/F

Back 33

True

Front 34

The difference in weight of water in the supply and return mains will create circulation in a gravity hot water heating system T/F

Back 34

True

Front 35

Two advantages of using higher temperature heating system are a smaller size radiation unit and a smaller size pipe.T/F

Back 35

True

Front 36

A closed hydronic heating system allows you to have higher water temperatures than in open gravity systems.T/F

Back 36

True

Front 37

Water temperatures in a closed hydronic heating system DO NOT affect the sizes of radiation piping. T/F .

Back 37

False,

Front 38

A compression tank is not necessary in a system if a pressure reducing valve is used T/F

Back 38

False, compression tank and PRV serve separate functions and must both be used.

Front 39

All closed hot water heating systems should have both a Pressure reducing valve and a relief valve.T/F

Back 39

True

Front 40

Relief Valves installed on residential hydronic systems are factory set to relieve water or steam if the systems pressure exceeds 30 psig T/F

Back 40

True

Front 41

It IS necessary to install flow-control valves if a hot water heating boiler is equipped with a heater for domestic water T/F

Back 41

True

Front 42

The difference in weight of water in the supply and return mains will create circulation in a gravity hot water heating system T/F

Back 42

True

Front 43

The heat emission rate of gravity system is 150-165 BTUH per square foot of radiation T/F

Back 43

True

Front 44

Two advantages of using higher temperature heating system are a smaller size radiation unit and a smaller size pipe.T/F

Back 44

True

Front 45

A closed hydronic heating system allows you to have higher water temperatures than in open gravity systems.T/F

Back 45

True

Front 46

Water temperatures in a closed hydronic heating system DO NOT affect the sizes of radiation piping. T/F .

Back 46

False,

Front 47

The BTU output of a boiler can be increased by raising the boiler water temperature.T/F

Back 47

True

Front 48

Resistance (Pressure Drop) affects the length of a series loop circut.T/F

Back 48

True

Front 49

A circuit in a one-pipe system decreases in size as radiation is taken off of it .T/F

Back 49

False,

Front 50

Piping connections to risers or room units are usually taken out of the top of the mains at either a 45 or 90 degree from the horizontal main .T/F

Back 50

True

Front 51

A two-pipe reverse return system should be provided with diversion tees at the room unit take-offs T/F

Back 51

False,

Front 52

The supply circuit of a two-pipe reverse return circuit diminishes in size as room units are returned into the circuit.T/F

Back 52

True

Front 53

The return circuit of a two-pipe reverse circuit diminishes in size as room units are returned into the circuit T/F

Back 53

False,

Front 54

The BTUH carrying capacity of a pipe decreases as the velocity of water in that pipe increasesT/F

Back 54

False,

Front 55

It is not necessary to calculate the pressure drop of a system to size the piping and the circulating pump.T/F

Back 55

False,

Front 56

Static pressure is greatest at lowest parts of the hydronic system T/F

Back 56

True

Front 57

Static pressure has no effect on pump operation in a closed system .T/F

Back 57

true

Front 58

A milinch is a measure of temperature.T/F

Back 58

False, A milinch is a measure of volume.

Front 59

It is permissible to install baseboard radiation on an inside wall if necessary .T/F

Back 59

True

Front 60

Room heating units,such as baseboards,convectors,radiators,etc..are sized to the heat loss of the room.T/F

Back 60

True

Front 61

Average water temperature does NOT enter into the sizing of room units T/F

Back 61

False

Front 62

Radiation units should be placed under windows and on outside walls as much as possible

Back 62

True

Front 63

Cast iron baseboard is NOT recommended for residential use T/F

Back 63

False

Front 64

Most residential copper fin tube baseboard heating elements consist of 3/4" seamless copper tube with attached fins.T/F

Back 64

True

Front 65

The height of a convector enclosure affects the BTUH output.T/F

Back 65

True

Front 66

Pressure drop through a convector does NOT affect the size of it's piping connections.

Back 66

False

Front 67

As the water temperature from a boiler becomes greater, the heating output of the radiation becomes greater.t/f

Back 67

True

Front 68

Heating elements for convector type baseboards are furnished in 6' lengths or less T/F

Back 68

True

Front 69

Cast iron radiant baseboards function similar to a radiant convector T/F

Back 69

True

Front 70

Piping for hot water heating returns CANNOT be installed in the same convector type baseboard enclosure along with a finned tube heating element.T/F

Back 70

False

Front 71

In what three ways does the human body lose it's heat?

Back 71

radiation
convection
evaporation

Front 72

What are four advantages of heating domestic hot water with a hot water heating boiler?

Back 72

1-ample hot water
2-continued boiler use, prevents deterioration
3- Boiler heat loss helps keep the basement dry
4- Ready instatnly during sudden temperature loss

Front 73

List Two of the options available for summer cooling in conjunction with hydronic heating:

Back 73

1- use baseboard hydronic units for heating with cooling provided by a chiller and fan coil unit which distributes cold air through short ducts to each room
2-combination heating and cooling units which are circulated with hot water in winter and cold water in summer

Front 74

What are two advantages of using a higher temperature heating system ?

Back 74

1-smaller pipe
2- smaller sized radiator unit

Front 75

List three types of hydronic heating systems

Back 75

1-series loop
2- one pipe
3- two pipe

Front 76

What is a milinch?

Back 76

1/1000 of an inch

Front 77

What is static pressure?

Back 77

weight of water in the system and is equal the .433 psi per foot of height above the guage.

Front 78

What are three ways pressure drop is expressed?

Back 78

1- Psi
2- milinch
3-feet of water

Front 79

What creates circulation in a forced hot water heating system?

Back 79

circulating pump

Front 80

What is pressure drop?

Back 80

Pressure drop is the amount of pressure lost between any two points in a system.

Front 81

What causes pressure drop?

Back 81

Power or energy consumed by moving through piping heating or cooling units, fittings etc friction in short.

Front 82

How does a hydronic heating system control body radiation loss?

Back 82

Heat-emission units most effectively warm all interior surfaces in a building. These are the surfaces which control the rate of radiant heat loss from the body.

Front 83

How does a hydronic heating system ensure adequate air movement?

Back 83

Provides mild convection heating which assures adequate air movement without down drafts from windows and cold walls.

Front 84

What is an outstanding performance characteristic of a hydronic heating system?

Back 84

Built in capacity for varying the temperature of the circulating water in order that the heated space is neither to warm nor to cold.

Front 85

Why is a hydronic heating system called even heat?

Back 85

Heat is supplied automatically and adjusts based on outside air temperatures.

Front 86

By what method can varying heating requirements of separate parts of a structure be satisfied?

Back 86

By zoning the system, different parts of the structure can be kept at different temperatures.

Front 87

Why is hydronic heating noted for its cleanliness?

Back 87

Hydronic heating is cleaner because the heating medium is confined in pipes and cannot carry dirt and odors from room to room.

Front 88

What may happen if excess humidity is introduced into a building?

Back 88

High humidity may cause building damage, wood rotting, brick fluorescence and insulation saturation.

Front 89

What is the difference between forced circulation installations and gravity systems with regard to emission rates?

Back 89

Forced circulation can use higher water temperatures and thus, have higher emission rates.

Front 90

List the advantages of the three types of hydronic heating systems.

Back 90

- series loop: lowest cost combined with high degree of comfort
- one pipe: control of individual rooms or zones manually or automatically
- two pipe: allows for high pressure drops

Front 91

When are diversion fittings required on both the supply and return lines?

Back 91

Always required for down feed radiation

Front 92

What pitch is required for installation of mains in a two pipe system?

Back 92

up and away from boiler, 1/2in per 10ft

Front 93

What effect would doubling the flow in a system have on pressure drop?

Back 93

4 times as great

Front 94

Why is it important to select the correct amount of radiation for a hydronic heating system?

Back 94

Too little radiation will not heat a building properly, while too much radiation makes the installation unnecessarily expensive.

Front 95

List four advantages of using baseboard radiation.

Back 95

1. they are inconspicuous
2. clean in operation
3. offer a minimum of interference with furniture placement
4. distribute heat near floor

Front 96

What are two factors in addition to size and design on which the capacity of radiation units depend?

Back 96

1. temperature drop of the water
2. temperature of the water being circulated

Front 97

Why is the length of piping important in a hydronic system?

Back 97

size of pipe and size of pump required

Front 98

The length of a pipe circuit does not affect its size. T/F

Back 98

False

Front 99

What purpose does the piping layout serve?

Back 99

for figuring pipe sizes, boiler location and location of room units

Front 100

Each complete circuit must be measured to determine which is longest. T/F

Back 100

True