WH Chap 1

Question 1

2 main types of propane water heaters

Answer 1

Standing pilot and direct spark ignition

Question 2

VAC AND VDC

Answer 2

Volts alternating current

Volts direct current

Question 3

What voltage do water heaters with an electric heating element require

Answer 3

120 VAC

Question 4

Do some water heaters use a combination of propane and electric

Answer 4

Yes

Question 5

Motor-aid?

Answer 5

Water heater is heated by hot engine coolant that flows through the water tank on some motorized RV’s

Question 6

ECO

Answer 6

Energy cutoff switch , a high temp limit switch

Question 7

Temp ECO will activate

Answer 7

180 f

Question 8

DSI

Answer 8

Direct spark ignition

Question 9

Is eco resettable

Answer 9

Only on DSI models, pilot models require replacement

Question 10

T&P valve

Answer 10

Temp and pressure relief valve activates upon over pressurization

Question 11

Thermostats regulate heat how on propane and 120 VAC models

Answer 11

Allows the water to reach a preset temp then shuts off the heat source

Question 12

Size and type of water flow connections on back of water heater and hot water location

Answer 12

1/2 in npt female and hot on top cold bottom

Question 13

Temps water remains a liquid

Answer 13

Above 32’ and below 212’

Question 14

anode rods are used in what type of water tank

Answer 14

Glass lined steel

Question 15

2 types of materials water heater tanks are made of

Answer 15

Glass lined steel and aluminum

Question 16

Anodes are made of

Answer 16

Aluminum or magnesium

Question 17

Inspect anode rods

Answer 17

Annually

Question 18

Electrolysis

Answer 18

Electrochemical corrosive process that can cause pin holes in tanks. Anode rods are used to sacrifice the rod instead of the tank

Question 19

Preset temp rating on ECO

Answer 19

180

Question 20

Electric models WH’s thermostat is usually preset to open at what temps

Answer 20

120 to 140

Question 21

2 types of heating elements

Answer 21

Screw in and bolt on

Question 22

What’s the wattage range of heating elements

Answer 22

1000 to 1500 W

Question 23

Heating elements common in 6 gallon tanks

Answer 23

1400W