Question

which of the following statements is true of tankless coils?
o tankless coils have a small high output burner
o the domestic boiler is left idle during the summer months
o no domestic water heater and tank are necessary
o a tempering valve is never necessary
o these coils take up considerable space in a home
question 6
which of the following statements is false with respect to electric water heaters?
o most water heaters have two elements
o the upper element usually comes on first
o the upper element has priority
o the lower element does more work
o it can be difficult to tell if one of the two elements is burned out

Explanation:

Tankless coils heat water on - demand, eliminating the need for a separate domestic water heater and tank. For electric water heaters, the lower element typically does more work as it heats the larger volume of water at the bottom of the tank.

Answer:

For the first question: no domestic water heater and tank are necessary
For the second question: the lower element does more work