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 can cause a decrease in suction pressure on an air-conditioning system?
A dirty evaporator
Outside of the male fitting
Slugging
A diffuser

2. What are the components of a hard-start kit?
300
When it is above a conditioned space
Potential relay and start capacitor
With 4' saddles

3. What is the typical pressure differance across a TXV?
Heat load
100 psig
Yes
A bypass duct or a dump zone

4. What do you use to check for leaks?
Nitrogen with a small amount of refrigerant
Before the vent
6
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity

5. What component changes refrigerant from a low pressure gas to a high pressure gas?
15% silphos
4
S-clips and drives (cleats)
Compressor

6. 10' round duct has a ballpark cfm of what?
Infiltration and ventilation
Fiberglass
400
Subtract ambient temperature from 100

7. If pressure rises - what happens to the superheat?
It rises
Standard
RLA/FLA x 5
Yes

8. Does a package unit come from the factory pre-charged?
In series
A piston type metering device
Yes
To remove humidity and lower dry bulb temperature

9. When must a copper joint never be soldered or brazed?
False
45 degrees F
It also rises
When the system is under pressure

10. A reciprocating compressor has what sort of moving parts?
ACR (air-conditioning refrigeration) tubing
Below 800 degrees F
It rises
Pistons

11. How are the condenser coils different on a high-efficiency unit?
150
Pistons
On the common terminal
They are larger

12. Sections of duct board can be fastened together with what?
Compressor
Staples and tape
When the system is under pressure
S-clips and drives (cleats)

13. What percentage silver do you use to braze two dissimilar metals such as steel and copper?
400
95 degrees F outside - 80 degrees F inside - and 50% relative humidity
Suction
45-55%

14. The load on the evaporater will effect which pressure?
SEER includes the energy used in the start-up and shut-down cycles
Suction
300
A band 4 inches or more in width

15. Can refrigerant line sets be altered in length?
L-type
30-35 degrees above ambient
Yes
True

16. How do you calculate ballpark superheat?
When the system is under pressure
Subtract ambient temperature from 100
With an are rating
Pistons

17. The evaporator is designed to remove what two types of heat?
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
Latent and sensible
In parallel
Heat loss

18. How much does a drain line need to drop per foot of length?

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

19. What are the three ways a motor can fail electrically?
15% silphos
Staples and tape
Indoor fan motor - outdoor fan motor - and the compressor
Shorted winding - open winding - and grounded winding

20. What is the design boiling point for most evaporator coils in residential air conditioning?
40 degrees F
Any amount
Shorted winding - open winding - and grounded winding
Average feet per minute X area in square feet (H' x W'/144)

21. On what terminal do you check amperage?
SEER includes the energy used in the start-up and shut-down cycles
Common
Any amount
15 A

22. What kind of refrigeratnts must be added in liquid form?
Blended refrigerants
105 degrees F
TXV
95 degrees F outside - 80 degrees F inside - and 50% relative humidity

23. How are high-efficiency condenser coils different from standard-efficiency condenser coils?
Yes
Infiltration and ventilation
They are physically larger
Positive

24. What standard weight copper tubing is most often used in the heating and air-conditioning industry?
Negative
L-type
Below 800 degrees F
In series

25. How does ACR copper pipe come?
Stranded
Individual return air systems and central return air systems
Dehydrated with caps on each end
Shorted winding - open winding - and grounded winding

26. Where do you apply flux when soldering?
Outside of the male fitting
45 degrees F
On the common terminal
In series

27. At what temperature will soft solder melt?
Before the vent
Side-by-side and over-and-under
Below 800 degrees F
Shorted winding - open winding - and grounded winding

28. Which is more efficient - a TXV or a fixed-orifice metering device?
To lower the amount of pressure drop through the coil
When the system is under pressure
A diffuser
TXV

29. What are the two functions of the air-conditioning system?
Suction
To remove humidity and lower dry bulb temperature
Infiltration and ventilation
S-clips and drives (cleats)

30. How many BTU's per ton?
18 gauge
The takeoff fitting
Belt drive and direct drive
12000

31. If the rpm's are 1750 - how many poles does the motor have?
Shorted winding - open winding - and grounded winding
Yes
Inclined manometer
4

32. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?
45-55%
Shorted winding - open winding - and grounded winding
Infiltration and ventilation
30 degrees F

33. Does a package unit come from the factory pre-charged?
S-clips and drives (cleats)
Yes
Individual return air systems and central return air systems
100 psig

34. What kind of copper tubing is used for plumbing and heating applications?
95 degrees F outside - 80 degrees F inside - and 50% relative humidity
Blended refrigerants
Nominal-sized tubing
20 degrees F

35. What is the difference between SEER and EER?
SEER includes the energy used in the start-up and shut-down cycles
Stranded
No
To lower the amount of pressure drop through the coil

36. Which type of wire can handle a higher ampacity?
It will have a decrease in superheat
Sheet metal - galvanized sheet metal - fiberglass - and flexduct
Subtract ambient temperature from 100
Stranded

37. What do you do after you braze a system?
30 A
Potential relay and start capacitor
A dirty evaporator
Pull a vacuum

38. 10 SEER is classified as what kind of efficiency?
Yes
Standard
40 degrees F
Below 800 degrees F

39. What do you do after you braze a system?
Infiltration and ventilation
It rises
Pull a vacuum
False

40. The evaporator is designed to remove what two types of heat?
It rises
Latent and sensible
1/4'
15 A

41. 7' round duct has a ballpark cfm of what?
In series
Inches of water column (in. WC)
Blended refrigerants
150

42. Can refrigerant line sets be altered in length?
Heat load
When it is a pull-through evaporator
When the system is under pressure
Yes

43. The compressor is cooled by liquid refrigerant. (True of False)
False
Below 800 degrees F
SEER includes the energy used in the start-up and shut-down cycles
ACR (air-conditioning refrigeration) tubing

44. How do you calculate ballpark superheat?
Over/under and side by side
Subtract ambient temperature from 100
1/4'
Standard

45. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?
It will have a decrease in superheat
A dirty evaporator
A bypass duct or a dump zone
Yes

46. On what terminal do you check amperage?
Pull a vacuum
Common
ACR (air-conditioning refrigeration) tubing
A dirty evaporator

47. What are the two types of blower drives?
4
400
Belt drive and direct drive
2 minutes

48. 10 SEER is classified as what kind of efficiency?
Duct with insulation on the inside
Pull a vacuum
To lower the amount of pressure drop through the coil
Standard

49. How do you calculate EER?
No
75 degrees F dry bulb indoor - 95 degrees F drybulb outdoor - and 50% relative humidity
Belt drive and direct drive
Btu/hr (output) / wattage (input)

50. The fan switch opens at what temperature?
30-35 degrees above ambient
Slugging
ACR (air-conditioning refrigeration) tubing
105 degrees F

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