Water Heater Basics Quiz

1. Question

What type and thickness of insulation would expect to find around the tank of a water heater which has an energy factor of 0.81?

Two inches of plastic foam.
One inch of plastic foam.
Two inches of cellulose insulation.
Three inches of fiberglass insulation.

2. Question

As an auditor, how would you estimate the demand for domestic hot water?

Interview the occupants for estimates of daily use.
Measure the temperature and pressure of the hot water.
Evaluate the wintertime gas bills.
Look at the energy rating on the hot water heater.

3. Question

How many heating elements does an electric water heater usually have?

2.0
1.0
3.0
4.0

4. Question

What is the most important advantage power vented gas water heaters have over standard gas water heaters?

They are safer to operate.
They use less fuel.
They have a lower initial cost.
They are more efficient.

5. Question

Why does a tankless water heater use less energy than a standard tank style?

It eliminates water heating standby losses.
It heats water up to 50% faster.
It heats water up to 50% faster.
It is smaller.

6. Question

What is the most cost-effective energy retrofit for older water heaters?

Installing tank insulation.
Replacing the anode.
De-rating the burner.
Cleaning the tank.

7. Question

What is the most important consideration when adding an external blanket to a gas water heater?

Insulate only the sides.
Insulate only the piping.
Insulate only the top.
Insulate only the top.

8. Question

What is the recommended domestic hot water temperature at the fixture?

120º F
110º F
140º F
130º F

9. Question

When installing insulation blankets on electric water heaters, what can safely be covered with the blanket?

The top of the tank.
The TP valve.
The thermostat.
The element access door.

10. Question

Which of the following is true about standard combustion storage water heaters?

They often have weak chimney draft.
They are quite efficient at heating water.
They have two-stage burners.
They typically have 0.75 energy factor or higher.

11. Question

What type of water heater control is this?

A gas-water-heater control
And electric water-heater control
A heat-pump water-heater control
None of these choices

12. Question

What is unusual about the venting system for this water heater?

It is sealed combustion
It is a power vent system
It employs a power burner
It hasn't efficiency of 95% or more

13. Question

What type of water heater is this?

A heat pump water heater
An instantaneous water heater
And electric resistance water heater
A gas combustion water heater

14. Question

What does this fan do for this gas water heater?

It assists and stabilizes the draft
It increases the draft dramatically for efficiency reasons
It slows the natural draft down to increase efficiency
It recycles hot gases to condense water vapor and optimize efficiency

15. Question

What is this?

The gas valve and burner of a gas-storage water heater
The burner and temperature control of a gas instantaneous water heater
The fan and burner assembly of a power burner for a gas water heater
None of these choices describes this assembly

16. Question

What are these two devices?

Two elements and their controls for an electric storage water heater
The electric elements that power an electric instantaneous water heater
The burner assemblies of two gas storage water heaters
The evaporator and condenser of a heat pump water heater

17. Question

What is this brass valve on the side of this water heater?

A pressure and temperature relief valve
A brass backflow preventer device
A hot-water temperature regulator valve
A pressure regulator

18. Question

Which of the following could provide the heat for the water in this indirect water heater?

All of these choices
Solar collectors
A hydronic boiler
Hot refrigerant from a condenser

19. Question

What type of water heater is this?

An instantaneous gas-fired water heater
An instantaneous electric resistance water heater
A heat-pump water-heater
A power burner water heater