Test your basic knowledge |

Residential Air Conditioning

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What are the two basic duct connection configurations for package units supply and return air ducts?
A swaging tool
5 degrees
Pull a vacuum
Over/under and side by side

2. When must a copper joint never be soldered or brazed?
A band 4 inches or more in width
When the system is under pressure
They are physically larger
With an are rating

3. Sections of duct board can be fastened together with what?
It will be low
100
2
Staples and tape

4. In what state is the refrigerant in the compressor?
2 minutes
Vapor
Rise
In parallel

5. What are the two types of return air systems in residential installations?
Compressor
With an are rating
400
Individual return air systems and central return air systems

6. What gauge is thermostat wire?
18 gauge
Heat load
With 4' saddles
Common

7. How do you achieve high-efficiency?
By increasing the surface of the condenser coil
Outside diameter (OD)
Over/under and side by side
Fiberglass

8. What are the three pressures created by moving air in ductwork?
Boil the liquid refrigerant out ot the oil within the crankcase
Static pressure - velocity pressure - and total pressure
Negative
SEER includes the energy used in the start-up and shut-down cycles

9. The A/C size is calculated by what?
A dirty evaporator
Heat load
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
False

10. 8' round duct has a ballpark cfm of what?
200
With 4' saddles
Nominal-sized tubing
30-35 degrees above ambient

11. What percentage silver do you use to braze two dissimilar metals such as steel and copper?
Nominal-sized tubing
45-55%
When it is above a conditioned space
They are physically larger

12. At what temperature will soft solder melt?
Inside diameter (ID)
Positive
ACR (air-conditioning refrigeration) tubing
Below 800 degrees F

13. If the rpm's are 1050 - how many poles does the motor have?
6
Boil the liquid refrigerant out ot the oil within the crankcase
Common
An air-conditioning system that has all four components (compressor - condenser - metering device - and evaporator) in one housing.

14. How do you calculate EER?
Btu/hr (output) / wattage (input)
Static pressure - velocity pressure - and total pressure
200
The takeoff fitting

15. How is the high pressure switch wired with the low pressure switch?
Latent and sensible
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
A band 4 inches or more in width
In parallel

16. What standard weight copper tubing is most often used in the heating and air-conditioning industry?
L-type
105 degrees F
TXV
TXV

17. What are the three ways a motor can fail electrically?
400
Vapor
Shorted winding - open winding - and grounded winding
Standard

18. Superheat should never be below how many degrees
45-55%
To lower the amount of pressure drop through the coil
5 degrees
200

19. What tool is used to expand the diameter of soft copper tubing
It rises
Inches of water column (in. WC)
RLA/FLA x 5
A swaging tool

20. How much superheat do you need to prevent liquid refrigerant from entering the compressor?
Any amount
Outside of the male fitting
Latent and sensible
Boil the liquid refrigerant out ot the oil within the crankcase

21. What distributes supply air to a room in a structure?
A diffuser
The suction line or the low-pressure side
Boil the liquid refrigerant out ot the oil within the crankcase
6

22. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)
A band 4 inches or more in width
High
True
Compressor

23. Most duct insulation is made of what?
30 A
Blended refrigerants
When the system is under pressure
Fiberglass

24. What is the name of the fitting where the branch line leaves the duct?
Boil the liquid refrigerant out ot the oil within the crankcase
Static pressure - velocity pressure - and total pressure
An air-conditioning system that has all four components (compressor - condenser - metering device - and evaporator) in one housing.
The takeoff fitting

25. How do you calculate the area of a circle?
Pi x radius squared
When it is above a conditioned space
Blended refrigerants
Blended refrigerants

26. What is the difference between SEER and EER?
Vapor
105 degrees F
With an are rating
SEER includes the energy used in the start-up and shut-down cycles

27. What gauge is thermostat wire?
5 degrees
Positive
18 gauge
Yes

28. Does a package unit come from the factory pre-charged?
45-55%
Duct - electrical - and mechanical
It will be high
Yes

29. What is the name of the fitting where the branch line leaves the duct?
105 degrees F
Boil the liquid refrigerant out ot the oil within the crankcase
The takeoff fitting
400

30. The fan switch closes at what temperature?
Sheet metal - galvanized sheet metal - fiberglass - and flexduct
8
With a minimum of three evenly spaced self-tapping screws
140 degrees F

31. In what length rolls is soft copper tubing normally available?
Any amount
Individual return air systems and central return air systems
Yes
25-ft or 50-ft

32. How is flexible duct supported?
Negative
A band 4 inches or more in width
SEER includes the energy used in the start-up and shut-down cycles
By increasing the surface of the condenser coil

33. How do you calculate cfm?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

34. What kind of refrigeratnts must be added in liquid form?
Duct with insulation on the inside
Inclined manometer
4
Blended refrigerants

35. On what terminal do you check amperage?
Static pressure - velocity pressure - and total pressure
In series
95 degrees F outside - 80 degrees F inside - and 50% relative humidity
Common

36. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?
Stranded
40 degrees F
Outside diameter (OD)
Individual return air systems and central return air systems

37. Where do you check the amps on a motor?
30 degrees F
On the common terminal
Suction
With 4' saddles

38. What component changes refrigerant from a low pressure gas to a high pressure gas?
Compressor
Over 800 degrees F
25-ft or 50-ft
15 A

39. How will too much refrigerant effect superheat?
4
Boil the liquid refrigerant out ot the oil within the crankcase
It will be low
25-ft or 50-ft

40. What is the typical pressure differance across a TXV?
Duct - electrical - and mechanical
100 psig
6
Belt drive and direct drive

41. What are the two types of package units?
The takeoff fitting
Side-by-side and over-and-under
Latent and sensible
Pull a vacuum

42. What are the components of a hard-start kit?
Potential relay and start capacitor
Fiberglass
Infiltration and ventilation
Inches of water column (in. WC)

43. How many amps can 8 g wire handle?
ACR (air-conditioning refrigeration) tubing
When the system is under pressure
140 degrees F
40 A

44. Pressure in ductwork is measured In what?
They are physically larger
In parallel
Indoor fan motor - outdoor fan motor - and the compressor
Inches of water column (in. WC)

45. Why is it necessary to have multiple refrigerant circuits in some evaporator coils?
Inside diameter (ID)
Blended refrigerants
To lower the amount of pressure drop through the coil
1/4'

46. What is it called when liquid refrigerant gets into the compressor?
Slugging
Nominal-sized tubing
45-55%
It rises

47. What is a package unit?
Infiltration and ventilation
Any amount
An air-conditioning system that has all four components (compressor - condenser - metering device - and evaporator) in one housing.
Positive

48. What tool is used to expand the diameter of soft copper tubing
It also rises
A swaging tool
The takeoff fitting
High

49. If the rpm's are 1750 - how many poles does the motor have?
Standard
A swaging tool
6
4

50. The compressor is cooled by liquid refrigerant. (True of False)
2 minutes
Inches of water column (in. WC)
False
45-55%

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

Residential Air Conditioning

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests