Plumbing Level 2: Btus

Front 1

What is a BTU

Back 1

The British Thermal Unit (BTU) is a unit of heat energy; it is defined as the amount of heat energy required to raise the temperature of one pound of water one degree Fahrenheit

Front 2

Sensible Heat

Back 2

Heat that can be measure with a thermometer. Sensible heat will cause a change in temperature only without causing a change in state. Example: Raising only the temperature of ice, water or steam

Front 3

Latent Heat

Back 3

Heat that causes a change in state without causing a change in temperature. Example: melting ice at 32°F to water at 32°F

Front 4

Latent heat of Fusion

Back 4

144 BTUs Per Pound

Front 5

Latent heat of Vaporization

Back 5

970.4 BTUs Per Pound

Front 6

Specific Heat

Back 6

The thermodynamic property which states the amount of heat required for a single unit of mass of a substance to be raised by one degree of temperature. *For liquids the standard is water (1) and for gasses the standard is air (1)

Front 7

Specific Heat: Hydrogen

Back 7

3.4

Front 8

Specific Heat: Liquid Ammonia

Back 8

1.25

Front 9

Specific Heat: Water

Back 9

1

Front 10

Specific Heat: Ice

Back 10

0.53 (in calculations it will be rounded to 0.5)

Front 11

Specific Heat: Steam

Back 11

0.48 (in calculations it will be rounded to 0.5)

Front 12

Specific Heat: Air

Back 12

0.24

Front 13

Step 1: Ice to Ice

Back 13

Mass (T1-T2) .5

Front 14

Step 2: Ice to Water

Back 14

Mass × 144

Front 15

Step 3: Water to Water

Back 15

Mass (T1-T2) 1

Front 16

Step 4: Water to Steam

Back 16

Mass × 970.4

Front 17

Step 5: Steam to Steam

Back 17

Mass (T1-T2) .5

Front 18

1 Imperial Gallon weighs how many pounds?

Back 18

10 lbs

Front 19

1 US Gallon weighs how many pounds?

Back 19

8.333 lbs

Front 20

Temperature that liquid water freezes to ice in °F

Back 20

32°F

Front 21

Temperature that liquid water changes to steam in °F

Back 21

212°F

Front 22

Temperature that liquid water changes to steam in °C

Back 22

100°C

Front 23

Temperature liquid water changes to ice in °C

Back 23

0°C

Front 24

USG in 1 cubic ft

Back 24

7.48 USG

Front 25

IMPG in 1 cubic ft

Back 25

6.24 IMPG

Front 26

°C to °F

Back 26

(t°C x 1.8)+32

Front 27

°F to °C

Back 27

(t°F - 32)÷1.8

Front 28

Watts formula

Back 28

V x Amps

Front 29

Take out Glycol

Back 29

Capacity x ((G current - G wanted total) ÷ G current)

Front 30

How many BTUs in a Cooling Ton

Back 30

12,000

Front 31

Water has a higher heat capacity then air by how much?

Back 31

3400 times

Front 32

How does heat move?

Back 32

Area of high temp to a area of low temp

Front 33

Heat transfer is expressed in?

Back 33

Btu/h

Front 34

Quantity of heat is expressed in?

Back 34

BTU

Front 35

What causes heat to move?

Back 35

Temperature difference

Front 36

3 types of heat transfer

Back 36

Conduction, Convection and Thermal Radiation

Front 37

When something feels cold we are sensing what?

Back 37

Rate of heat loss

Front 38

Natural convection is

Back 38

Buoyancy differences within a "fluid" cause it to move

Front 39

All heating systems will try and achieve what?

Back 39

Thermal equilibrium

Front 40

The 4 basic hydronic subsystems are

Back 40

1.Heat source

2. Distribution systems

3.Heat emitters

4.The Control system

Front 41

Gas line on a boiler is the

Back 41

Energy Input

Front 42

Two control devices are

Back 42

Room thermostat and Temperature-limiting control (aquastat)

Front 43

All closed loop systems must be protected by a

Back 43

Pressure relief valve

Front 44

Make-up water systems consists of

Back 44

Pressure reducing valve (feed water valve), backflow preventor, pressure gauge and a **** off valve

Front 45

A flow check valve helps protect against

Back 45

Thermosyphoning

Front 46

Hydronic Heat Sources

Back 46

•Conventional Gas and oil fired boilers

•Condensing Gas fired boilers

•Electric Resistance Boilers

•Electric Thermal Storage equipment

•Renewable energy heat sources

Front 47

This is?

Back 47

Wet based cast iron sectional boiler

Front 48

This is?

Back 48

Packaged cast-iron sectional boiler

Front 49

This is?

Back 49

Vertical fire tube steel boiler

Front 50

This is?

Back 50

3 pass horizontal fire tube boiler

Front 51

This is?

Back 51

Combo boiler and domestic water heater

Front 52

This is?

Back 52

Dry based sectional boiler

Front 53

This is?

Back 53

Domestic water heater used as a "dual use"

Front 54

Unconfined spaces must have a minimum of...

Back 54

50 cubic feet of volume per 1000btu/h

Front 55

1 Watt = how many BTUs per hour?

Back 55

3.413 btu/h

Front 56

Minimum flow velocity in a hydranic heating system is

Back 56

2ft/sec