Deck 38: Installation

Question 1

When hanging a horizontal air handler, it should be pitched toward the drain port for proper condensate removal.

Answer 1

False

Question 2

When the length of quick-connect precharged line sets is altered, the charge will not normally have to be altered.

Answer 2

False

Question 3

Application of acoustical lining to the interior of a duct is accomplished by using tabs, glue, or both.

Answer 3

True

Question 4

An auxiliary drain pan under the unit is recommended when the evaporator is installed ____.

A) near a dry well
B) at the end of the house
C) above the conditioned space
D) next to a driveway or patio

Question 5

A boot in a duct system is a fitting used ____.

A) at the plenum
B) between the trunk duct and the branch duct
C) between the branch duct and the supply register
D) to eliminate vibration between the unit and the duct

Question 6

What two fasteners are used with fiberglass ductboard?

A) "S" fasteners (slips) and drive clips.
B) Staples and tape.
C) Self-tapping screws and draw bands.
D) Tabs and adhesives.

Question 7

When installing a split air-conditioning system with a remote condensing unit, the line set may be altered if the standard length was incorrect for installation.

Question 8

____ used at the end of a metal duct run will help reduce any noise that may be traveling through the duct.

A) Fiberglass ductboard
B) Aluminum duct
C) Insulated metal duct
D) Flexible duct

Question 9

A good way to fasten acoustical lining to the inside of sheet metal duct is to use ____.

A) "S" fasteners (slips) and drive clips
B) staples and tape
C) self-tapping screws and draw bands
D) tabs and adhesives

Question 10

The sun shining on the panels and coils of the condensing section will lower the efficiency of the unit.

Question 11

Once the power has been connected to the condensing unit of a package air conditioner, it is a good idea to start the compressor immediately to make certain it runs.

Question 12

One drawback of using custom made, pre-fabricated duct sections is that ____.

A) if the measuring was not done correctly, the job may not go together
B) altering a duct section at the job site results in lost time
C) altering a duct section at the job site is extremely cost-ineffective
D) All of the above.

Question 13

Power to the control transformer is controlled by the conditioned area thermostat.

Question 14

What fastener is commonly used with round flexible duct?

A) "S" fasteners (slips) and drive clips.
B) Staples and tape.
C) Self-tapping screws.
D) Tabs and adhesives.

Question 15

After refrigerant lines have been installed, they should be evacuated to a(n) ____ vacuum.

A) average
B) low
C) moderate
D) deep

Question 16

What two fasteners are used with sheet metal square and rectangular duct?

A) "S" fasteners (slips) and drive clips.
B) Staples and tape.
C) Self-tapping screws and draw bands.
D) Tabs and adhesives.

Question 17

When removing the rubber plugs from a line set, the hiss indicates that the tubing is not leaking.

Question 18

One purpose of a flexible duct connector in a duct system is to reduce the transmission of noise and vibration.

Question 19

A fitting used to change the size of a square or rectangular duct is called a(n) ____________________.

Question 20

A trap in the condensate line prevents ____.

A) air from being drawn up into unit from the end of the drain
B) foreign particles from being pulled into the condenser
C) the pump turning on if the float fails
D) Both a and b.

Question 21

Before a system is evacuated, all piping should be filled with nitrogen and a small amount of refrigerant, in order to be ___________________ checked.

Question 22

The typical gauge wire that is used in low voltage control circuits is ____________________ gauge.

Question 23

Even though the cooling wire runs from the thermostat to the air handler, it actually just continues on to the condensing unit. Why isn't the cooling wire run directly from the thermostat to the condensing unit?

Question 24

What materials are normally used in air-conditioning duct systems?

Question 25

Explain service accessibility.

Question 26

Why is it necessary that the crankcase heater heats the compressor crankcase before starting the compressor?

Question 27

How much does sunshine affect the operation of a condensing unit?

Question 28

A split central air-conditioning system is installed with the control transformer located in the attic-hung air handler and the condensing unit located outside. The low voltage wire from the thermostat is run to the ____________________.

Question 29

The line voltage for a system is normally installed by whom?

Question 30

What does a technician do before altering a precharged line set?

Question 31

A round to rectangular fitting is called a(n) ____________________.

Question 32

If a duct system has large air leaks at the connections, what can be used to seal them up?