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. Does a package unit come from the factory pre-charged?
It will have a decrease in superheat
Individual return air systems and central return air systems
Heat loss
Yes

2. Where do you check the amps on a motor?
On the common terminal
Duct with insulation on the inside
To lower the amount of pressure drop through the coil
It will be high

3. What component changes refrigerant from a low pressure gas to a high pressure gas?
Stranded
Compressor
Btu/hr (output) / wattage (input)
When the system is under pressure

4. How long should you leave a system off once you kill power before restarting it?
Dehydrated with caps on each end
18 gauge
2 minutes
Heat loss

5. In what length rolls is soft copper tubing normally available?
Potential relay and start capacitor
25-ft or 50-ft
A diffuser
With 4' saddles

6. At what temperature does refrigerant condense in a high-efficiency unit?
Indoor fan motor - outdoor fan motor - and the compressor
20 degrees above ambient
Average feet per minute X area in square feet (H' x W'/144)
True

7. What is lined duct?
Common
Duct with insulation on the inside
Nominal-sized tubing
Potential relay and start capacitor

8. What are the two basic duct connection configurations for package units supply and return air ducts?
40 A
It will have a decrease in superheat
Standard
Over/under and side by side

9. Where do you check the amps on a motor?
On the common terminal
A dirty evaporator
Negative
Latent and sensible

10. How are round ducts connected to one another?
With a minimum of three evenly spaced self-tapping screws
Outside diameter (OD)
Inches of water column (in. WC)
When it is a pull-through evaporator

11. If the rpm's are 1050 - how many poles does the motor have?
TXV
6
False
Suction

12. Where do you apply flux when soldering?
20 degrees F
Potential relay and start capacitor
Positive
Outside of the male fitting

13. Can refrigerant line sets be altered in length?
Yes
Latent and sensible
Yes
Inches of water column (in. WC)

14. Will a dirty condenser cause a rise or fall in pressure?
6
2 minutes
Rise
Nitrogen with a small amount of refrigerant

15. What are the three ways a motor can fail electrically?
Inclined manometer
Shorted winding - open winding - and grounded winding
A dirty evaporator
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity

16. What is the difference between SEER and EER?
Yes
150
Inside diameter (ID)
SEER includes the energy used in the start-up and shut-down cycles

17. What is the normal evaporator temperature?
40 A
45 degrees F
S-clips and drives (cleats)
True

18. How many amps can 14 g wire handle?
Duct with insulation on the inside
S-clips and drives (cleats)
15 A
Pistons

19. What are the three crafts normally associated with an air-conditioned installation?
ACR (air-conditioning refrigeration) tubing
Duct - electrical - and mechanical
The suction line or the low-pressure side
They are physically larger

20. What do you use to connect square and rectangular ductboard together?
With an are rating
S-clips and drives (cleats)
To lower the amount of pressure drop through the coil
Boil the liquid refrigerant out ot the oil within the crankcase

21. How are high-efficiency condenser coils different from standard-efficiency condenser coils?
They are physically larger
Inclined manometer
Compressor
Dehydrated with caps on each end

22. What are the four materials used to make duct?
Over 800 degrees F
Staples and tape
Pull a vacuum
Sheet metal - galvanized sheet metal - fiberglass - and flexduct

23. What is the normal evaporator temperature?
105 degrees F
High
45 degrees F
30 A

24. How will too much refrigerant effect subcooling?
Outside diameter (OD)
Standard
A band 4 inches or more in width
It will be high

25. What kind of copper tubing is used for plumbing and heating applications?
With 4' saddles
Nominal-sized tubing
105 degrees F
True

26. What sort of pressure will a pull-through evaporator have?
200
When it is above a conditioned space
A dirty evaporator
Negative

27. What are the components of a hard-start kit?
Potential relay and start capacitor
Average feet per minute X area in square feet (H' x W'/144)
Heat loss
By increasing the surface of the condenser coil

28. What kind of metering device do high-efficiency units usually use?
A bypass duct or a dump zone
Inside diameter (ID)
TXV
40 degrees F

29. How does ACR copper pipe come?
Dehydrated with caps on each end
45 degrees F
A piston type metering device
5 degrees

30. The furnace size is calculated by what?
Compressor
Potential relay and start capacitor
Blended refrigerants
Heat loss

31. What are the two types of return air systems in residential installations?
30 A
Individual return air systems and central return air systems
Heat load
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity

32. What distributes supply air to a room in a structure?
Latent and sensible
Btu/hr (output) / wattage (input)
A diffuser
Standard

33. How do you calculate ballpark superheat?
Yes
Inclined manometer
Subtract ambient temperature from 100
No

34. What are the three ways a motor can fail electrically?
Shorted winding - open winding - and grounded winding
A bypass duct or a dump zone
40 A
20 degrees above ambient

35. What are the three pressures created by moving air in ductwork?
40 degrees F
Side-by-side and over-and-under
Static pressure - velocity pressure - and total pressure
18 gauge

36. How do you achieve high-efficiency?
Yes
Nitrogen with a small amount of refrigerant
RLA/FLA x 5
By increasing the surface of the condenser coil

37. Where is insulation used on copper tubing used for air-conditioning?
The suction line or the low-pressure side
In series
It will be high
200

38. 8' round duct has a ballpark cfm of what?
ACR (air-conditioning refrigeration) tubing
200
Yes
Over/under and side by side

39. How do you calculate LRA?
A piston type metering device
With 4' saddles
140 degrees F
RLA/FLA x 5

40. What is the typical pressure differance across a TXV?
5 degrees
SEER includes the energy used in the start-up and shut-down cycles
100 psig
A piston type metering device

41. How many amps can 12 g wire handle?
20 A
When it is above a conditioned space
Before the vent
1/4'

42. What can cause a decrease in suction pressure on an air-conditioning system?
It will be high
Before the vent
45-55%
A dirty evaporator

43. When must a copper joint never be soldered or brazed?
They are larger
1/4'
Outside diameter (OD)
When the system is under pressure

44. Sections of duct board can be fastened together with what?
Staples and tape
20 degrees above ambient
Before the vent
The suction line or the low-pressure side

45. How will too much refrigerant effect subcooling?
8-12 degrees F
Suction
Negative
It will be high

46. At what temperature will soft solder melt?
It will be high
Infiltration and ventilation
45 degrees F
Below 800 degrees F

47. What is a package unit?
To lower the amount of pressure drop through the coil
True
Indoor fan motor - outdoor fan motor - and the compressor
An air-conditioning system that has all four components (compressor - condenser - metering device - and evaporator) in one housing.

48. The load on the evaporater will effect which pressure?
100 psig
To keep refrigerant from absorbing heat and to prevent condensation from forming on the line
Suction
30 A

49. What type of air conditioning system must be charged using the superheat method?
Blended refrigerants
15 A
45-55%
A piston type metering device

50. How many amps can 8 g wire handle?
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
40 A
A band 4 inches or more in width
Compressor

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