Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ICA > ICA Module 2 Section 2 Air Conditioning > Flashcards

ICA Module 2 Section 2 Air Conditioning Flashcards

1
Q

List at least 10 items that affect the amount of air-conditioning needed in a home

A

outdoor temp, outdoor humidity, level of insulation in home, air gaps, how many panes are in windows

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many square feet can 1 ton of air-conditioning cool in Florida?

A

450-700 sqft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many square feet can 1 ton of air-conditioning cool in Michigan?

A

700-1000 sqft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Oversized distribution ductwork is a common problem with central air-conditioning. T/F

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

An undersized air conditioner is better than an oversized one. T/F

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The typical temperature drop from outdoors to indoors with a properly operating air-conditioning system would be about 15 degrees F. T/F

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What kind of temperature drop would you expect to find in the house air as it passes over the evaporator coil?

A

15 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

A compressor can be thought of as a pump. T/F

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Compressors are typically located indoors on an air-to-air split system air-conditioning system. T/F

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the function of a sump or a crankcase heater?

A

Keeps oil warm enough to boil off refrigerant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

List 8 common compressor problems.

A

excess noise, short cycling, not level, wrong breaker size, not cooling, not working

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The condenser coil in a split system is typically located ___.

A

in cabinet (condenser unit)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The evaporator coil in a split system is typically located _____.

A

just past furnace heat exchanger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The condenser fan in a split system is located _____.

A

in front of compressor & condenser coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

List 4 condenser-coil problems.

A

dirty, damaged, corrosion, dryer exhaust too close

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

List 3 common configurations of evaporator coils.

A

A coil, N coil, Slab coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Evaporator coils should be upstream of furnace heat exchanges. T/F

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

List 6 common evaporator problems.

A

no access to coil, dirty, frost, damage, corrosion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

In one sentence, describe the function of a capillary tube.

A

expansion device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

In one sentence, describe the function of a thermostatic expansion valve.

A

metering device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

List 4 common expansion device problems

A

capillary tube defects, loose, clogged, sticking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

List 5 possible causes of leaking condensate drain pans

A

rust, cracks, dirt accumulation, improper slope

23
Q

When is an auxillary condensate drain pan needed?

A

above finished living space

24
Q

What are condensate drain lines usually made of?

A

plastic, copper

25
Q

Do condensate drain lines ever have a trap?

A

Yes

26
Q

What is the purpose of the condensate trap?

A

use weight of water to stop the flow of air (like a P-trap)

27
Q

List 2 acceptable discharge points for condensate drain lines & 1 generally unacceptable discharge point.

A

Acceptable=sink, floor drain
Not Acceptable=through floor (slab)

28
Q

List 3 common condensate pump problems

A

not working, leaking, poorly wired

29
Q

Refrigerant lines are usually made of ___

A

copper

30
Q

The larger refrigerant lines contains a liquid T/F

A

False

31
Q

The smaller refrigerant line is called the suction line. T/F

A

False

32
Q

The larger refrigerant line is called the return line. T/F

A

True

33
Q

List 5 common refrigerant line problems.

A

leaking, damage, missing insulation, too warm/cold, too c?

34
Q

How would you normally identify a leak in a refrigerant line visually?

A

oil residue

35
Q

Which line should be cold when the system is operating?

A

suction/return line (large line)

36
Q

Which line should be warm when the system is operating?

A

liquid line (small line)

37
Q

Which line should be insulated?

A

suction line (large line)

38
Q

Where is the condenser fan in a split system located?

A

condenser cabinet

39
Q

What is the typical inlet & outlet temperature of air across the condenser fan?

A

20 & 50 degrees

40
Q

List 4 common condenser-fan problems.

A

noisy, not working, corrosion, obstructed air flow

41
Q

Where is the evaporator fan typically located in a split system?

A

inside air handler (inside house)

42
Q

The amount of air that must cross an evaporator coil in a heating climate is less than the amount of air that must cross a conventional furnace heat exchanger coil. T/F

A

?

43
Q

Oversized ducts are a common problem. T/F

A

False

44
Q

High-level returns are more appropriate for heating than cooling. T/F

A

False?

45
Q

Ducts passing through unconditioned spaces such as attics or crawlspaces should be _____.

A

insulated & air tight

46
Q

List 7 common problems with thermostats

A

not working, loose, dirty, damaged, not level, poor location

47
Q

How long do air-conditioning systems typically last in your area?

A

10-15 years

48
Q

What is the typical warranty period for a compressor?

A

10 years

49
Q

Heat pumps are generally sized based on:
A. heating load
B. cooling load
C. other

A

A-heating load (capacity)

50
Q

The implication of an oversized heat pump during the summer months is what?

A

damp climate indoors

51
Q

You should not operate the heat pump in the heating mode when the outdoor temperature is above _____.

A

65 degrees

52
Q

You should not operate the heat pump in the cooling mode when the outdoor temperature is below _____.

A

65 degrees

53
Q

List at least 8 clues that would suggest that you are looking at a heat pump rather than a central air-conditioning system.

A

data plate, if thermostat has emergency heat setting, 2 stage thermostat, both lines are insulated, reversing valve present, 2 expansion devices, compressor indoors, outdoor thermostat, operated in winter

54
Q

List 7 common heat pump problems distinct from common air-conditioning problems.

A

oversized for cooling/undersized for heating, inoperative, poor control coil location, coil iced up, air flow problems, no back up heat, old

ICA (52 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions