Module 7: Heating and Cooling Systems

Question 1

Voltage for most homes

Answer 1

240 volt system that provides 240-120 volts

Question 2

Voltage

Answer 2

potential energy of any electrical system

Question 3

Resistance

Answer 3

tendency of any material to resist the flow of electricity

Question 4

Conductive materials have

Answer 4

low resistance

Question 5

Watts

Answer 5

voltage x current

Question 6

Bushbar is a current carrying

Answer 6

metal bar w/ have black and red wires connected to it

Question 7

white wire is connected to

Answer 7

neutral bushbar

Question 8

black wires are known as

Answer 8

hot wires

Question 9

breakers are directly connected to

Answer 9

red or blackbushbar

Question 10

Distribution panel typically has 10 120 volt circuits or

Answer 10

1+ 240 for large electric appliances

Question 11

Ground fault circuit interrupter

Answer 11

shuts off the power when a current is leaking

Question 12

Most circuits are rated at

Answer 12

15 amps

Question 13

Problems w aluminum wiring

Answer 13

• softer than copper can lead to overheating
• creeping: expands more than copper, and can lead to a loose connection & overheating
• Can become oxidized and corrode

Question 14

What does upgrading to a cicuit breaker from fuses do

Answer 14

protects electrical system from overloading which results in a fire

Question 15

how close should exterior outlets have to be to have a GFCI

Answer 15

2.5 meters

Question 16

Overloading

Answer 16

circuit is drawing more current than it can handle

Question 17

short cirucit

Answer 17

hot wire and neutral wire touch

Question 18

ground fault

Answer 18

hot wire and ground wire come in contact

Question 19

short circuit

ground fault happen bc

Answer 19

one or both wires come loose

Question 20

flickering/dimming lights is caused by

Answer 20

heavy load on a circuit

Question 21

Houses that face ___ are good for solar panels

Answer 21

southwest

Question 22

Capacity is the amount of heat a system can generate. Input capacity is

Answer 22

how much fuel energy is consumed for every hour of operation

Question 23

Input capacity is measured in

Answer 23

BTU (amount of heat required to raise temp of 1 lb of water by 1 f degree)

Question 24

Output capacity

Answer 24

how much usable heating/cooling a unit provides

Question 25

Effiency rating is

Answer 25

input cap + output cap

Question 26

AFUE rating

Answer 26

how much fuel is converted to heat

Question 27

60% (low-effiency) AFUE rating

Answer 27

40 cents of every dollar spent on heating are wasted

Question 28

80% (mid-effiency) AFUE rating

Answer 28

20 cents of every dollar spent on heating are wasted

Question 29

95% (high-effiency) AFUE rating

Answer 29

5 cents of every dollar spent on heating are wasted

Question 30

Radiant heating systems

Answer 30

supply heat directly to the floor or to the walls

Question 31

Heat exchanger

Answer 31

buring feul on one side, water on the other to heat it to 71 degrees

Question 32

In AC, refrigerant is put under pressure by a compressor until

Answer 32

it becomes liquid which is cooled by a condenser until it becomes liquid

Question 33

Vented fireplaces lose less heat

Answer 33

than fireplaces w chimneys

Question 34

Wood energy tech transfer is a

Answer 34

inspection of all wood burning appliances

Question 35

Normal water pressure

Answer 35

50 psi

Question 36

Low water pressure can be caused by

Answer 36

- older service pipes that are too small | - shut-off valve is half open or clogged

Question 37

black water

Answer 37

human waste

Question 38

gray water

Answer 38

waste water from dishes, showers

Question 39

PEX piping

Answer 39

can be used for water distribution, hot water, draining, venting

Question 40

PVC piping

Answer 40

used for warm, cold water, drainage, venting

Question 41

CPVC piping

Answer 41

can be used for everything, less noisy, more flexible

Question 42

Not advisable to use for drinking water

Answer 42

Galvanized steel

Question 43

Grey water systems

Answer 43

enables how to use water for tasks that dont need perfectly clean water

Question 44

Cisterns

Answer 44

collect rainwater for using in outdoor tasks

Question 45

Water heater recovery rate

Answer 45

amount of hot water the heater is capable of providing

Question 46

Fastest recovery rate

Answer 46

oil (followed by gas, electricity)

Question 47

leaky faucet 1 drip per second =

Answer 47

20 liters a day

Question 48

Waste quality and quantity in wells is covered by

Answer 48

ontario water resources act and safe drinking water act

Question 49

Pitless adapter

Answer 49

connect the well casing w/ the water line into a home

Question 50

Average flow rate

Answer 50

25 to 55 liters per minute

Question 51

Class 1 sewage system

Answer 51

waterless toilets

Question 52

Class 2 sewage system

Answer 52

grey water systems

Question 53

Class 3 sewage system

Answer 53

cesspools, dumping stations for recreational vehicles

Question 54

Class 4 sewage system

Answer 54

septic tank & leaching bed - most commonly used

Question 55

Class 5 sewage system

Answer 55

holding tank that is removed and taken away for treatment

Question 56

Septic tanks should be at least __ from any structure

Answer 56

1.5 meters

Question 57

Septic tanks should be at least __ from | the property line

Answer 57

3 m

Question 58

Septic tanks should be at least __ from a lake, river etc.

Answer 58

15 m