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. How many amps can 10 g wire handle?
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
30 A
They are physically larger
It rises

2. How are round ducts connected to one another?
With a minimum of three evenly spaced self-tapping screws
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
Shorted winding - open winding - and grounded winding
20 A

3. Multiple-zone systems often use what to alleviate the problem of excess air when only some zones are calling for conditioning?
A bypass duct or a dump zone
Compressor
2 minutes
Slugging

4. How will too much refrigerant effect superheat?
It will be low
To lower the amount of pressure drop through the coil
In parallel
200

5. How do you calculate ballpark superheat?
Standard
Subtract ambient temperature from 100
30-35 degrees above ambient
150

6. If the suction pressure rises - what happens to the head pressure?
Indoor fan motor - outdoor fan motor - and the compressor
45 degrees F
Boil the liquid refrigerant out ot the oil within the crankcase
It also rises

7. 13 SEER is classified as what kind of efficiency?
Yes
High
Dehydrated with caps on each end
Indoor fan motor - outdoor fan motor - and the compressor

8. What do you use to check for leaks?
30 degrees F
Nitrogen with a small amount of refrigerant
It also rises
Yes

9. How many BTU's per ton?
Heat loss
12000
An air-conditioning system that has all four components (compressor - condenser - metering device - and evaporator) in one housing.
With an are rating

10. Where do you install a trap on a drain line?
Before the vent
A bypass duct or a dump zone
Standard
No

11. If pressure rises - what happens to the superheat?
To remove humidity and lower dry bulb temperature
It rises
Average feet per minute X area in square feet (H' x W'/144)
SEER includes the energy used in the start-up and shut-down cycles

12. How much superheat do you need to prevent liquid refrigerant from entering the compressor?
They are larger
2
Any amount
20 A

13. What percentage silver do you use to braze two dissimilar metals such as steel and copper?
2 minutes
Sheet metal - galvanized sheet metal - fiberglass - and flexduct
45-55%
Nominal-sized tubing

14. What are the components of a hard-start kit?
Static pressure - velocity pressure - and total pressure
In series
Potential relay and start capacitor
When the system is under pressure

15. Sections of duct board can be fastened together with what?
Yes
Staples and tape
2
200

16. What are the four materials used to make duct?
40 A
Suction
4
Sheet metal - galvanized sheet metal - fiberglass - and flexduct

17. At what temperature will soft solder melt?
The takeoff fitting
12000
Below 800 degrees F
105 degrees F

18. What are the two functions of the air-conditioning system?
SEER includes the energy used in the start-up and shut-down cycles
To remove humidity and lower dry bulb temperature
With an are rating
When the system is under pressure

19. If pressure rises - what happens to the superheat?
Inclined manometer
It rises
Latent and sensible
A bypass duct or a dump zone

20. Do you need a vent on a push-through evaporator?
40 A
Yes
Yes
105 degrees F

21. How do you calculate ballpark superheat?
100
The takeoff fitting
Subtract ambient temperature from 100
A swaging tool

22. How do you achieve high-efficiency?
45 degrees F
By increasing the surface of the condenser coil
45-55%
ACR (air-conditioning refrigeration) tubing

23. At what temperature will brazing melt?
40 A
It will be low
Duct - electrical - and mechanical
Over 800 degrees F

24. Multiple-zone systems often use what to alleviate the problem of excess air when only some zones are calling for conditioning?
Over/under and side by side
300
Subtract ambient temperature from 100
A bypass duct or a dump zone

25. At what temperature does refrigerant condense in a standard-efficiency unit?
30-35 degrees above ambient
40 degrees F
A diffuser
A band 4 inches or more in width

26. The fan switch closes at what temperature?
400
140 degrees F
Below 800 degrees F
40 degrees F

27. What distributes supply air to a room in a structure?
Over/under and side by side
140 degrees F
When it is above a conditioned space
A diffuser

28. Do you need a trap on a push-through evaporator?
L-type
Common
Infiltration and ventilation
No

29. What is lined duct?
It also rises
Fiberglass
Duct with insulation on the inside
False

30. What kind of copper tubing is used for plumbing and heating applications?
Nominal-sized tubing
12000
45-55%
Pi x radius squared

31. What kind of copper tubing is used for plumbing and heating applications?
TXV
It rises
20 degrees above ambient
Nominal-sized tubing

32. Superheat should never be below how many degrees
45 degrees F
Before the vent
5 degrees
18 gauge

33. How is insulation around a duct rated?
The suction line or the low-pressure side
With an are rating
30 A
Subtract ambient temperature from 100

34. 8' round duct has a ballpark cfm of what?
False
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
300
200

35. Why is it necessary to have multiple refrigerant circuits in some evaporator coils?
105 degrees F
To lower the amount of pressure drop through the coil
They are larger
6

36. What can cause a decrease in suction pressure on an air-conditioning system?
Duct with insulation on the inside
A dirty evaporator
105 degrees F
25-ft or 50-ft

37. 8' round duct has a ballpark cfm of what?
12000
The takeoff fitting
200
Nitrogen with a small amount of refrigerant

38. How is ACR tubing sized?
Outside diameter (OD)
Average feet per minute X area in square feet (H' x W'/144)
Nitrogen with a small amount of refrigerant
Staples and tape

39. How are high-efficiency condenser coils different from standard-efficiency condenser coils?
Positive
They are physically larger
Pi x radius squared
25-ft or 50-ft

40. What are the two ways that fresh air enters a structure?
Infiltration and ventilation
40 degrees F
18 gauge
8-12 degrees F

41. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?
Heat loss
It will have a decrease in superheat
When it is a pull-through evaporator
Any amount

42. What are the two functions of the air-conditioning system?
Before the vent
They are larger
To remove humidity and lower dry bulb temperature
High

43. How many cfm per ton?
400
30 A
140 degrees F
40 degrees F

44. What are the two types of package units?
Inches of water column (in. WC)
True
Compressor
Side-by-side and over-and-under

45. What are the two types of return air systems in residential installations?
Stranded
It rises
Positive
Individual return air systems and central return air systems

46. How will too much refrigerant effect subcooling?
Staples and tape
It will be high
18 gauge
Yes

47. Do you need a vent on a pull-through evaporator?
In parallel
Common
Yes
Positive

48. What is used to measure static air pressure in ducts.
Stranded
Outside of the male fitting
Inclined manometer
Fiberglass

49. What standard weight copper tubing is most often used in the heating and air-conditioning industry?
Belt drive and direct drive
L-type
Duct with insulation on the inside
Vapor

50. Pressure in ductwork is measured In what?
2 minutes
Inches of water column (in. WC)
Negative
A bypass duct or a dump zone

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