Week 4 Unit 67 & 68 Exam

Compared to the installation of a gas or oil furnace, an electric furnace installation is:

• About the same complexity and difficulty.

• More complex, but generally easier.

• Less complex, but generally more difficult.

• Less complex and easier.

"The minimum distances from each of the furnace surfaces to any combustible materials" describes which of the following?

• The furnace clearance maximums

• The furnace measurements

• The furnace clearance minimums

• The furnace regulations

Why should electric furnaces NOT rest directly on the ceiling joists?

• Most electric furnaces should have a 6-inch clearance to combustibles on all sides.

• The ceiling will act as a sounding board and transmit the blower sound throughout the house.

• Most electric furnaces cannot be installed in the horizontal position.

• Most electric furnaces are too heavy to be supported by ceiling joists.

Which of the following unit clearances is typically the largest?

• Service clearance

• A 6-inch clearance from all combustibles on all sides

• Clearance for the vent

• A 12-inch clearance from all items that can be damaged by the strong magnetic force field generated by the furnace

What is the main difference between a heat pump and a fossil fuel furnace?

• Heat pumps are easier to install.

• Fossil fuel furnaces are hotter.

• Fossil fuel furnaces have been around longer.

• Heat pumps move heat instead of burning a fuel to create it.

What happens when a furnace is installed on lower-voltage supplies?

• There is a significant loss of heating capacity.

• There is a significant gain in heating capacity.

• The furnace will not operate correctly if it is installed on lower-voltage supplies.

The heat source for an air-source heat pump is:

• The air inside the house.

• Electric strip heat.

• The air outside the house.

• The water in the water loop.

Why are the coils in an air-source heat pump referred to as the outdoor coil and indoor coil instead of the condenser and evaporator?

• Their function (evaporator or condenser) reverses when the unit changes from cooling to heating.

• Refrigerant does not evaporate or condense in a heat pump coil.

• Because both the coils in a heat pump coils are identical.

• It can sometimes be difficult to determine the exact location of the coils.

What is the most common form of auxiliary heat used in heat pumps?

• Electric boiler

• Oil furnace

• Gas furnace

• Electric resistance strip heatelectric

The most important part of an electric furnace installation is:

• The size of the fan.

• The placement of the thermostat.

• The sizing of the wiring.

• The installation of the pump.