Refrigeration Basics Quiz - HVAC School

Tech Tips
Quizzes
Resources
About
Partners
- Products
Store
Search
Login

Tech Tips
Quizzes
Resources
About
Partners
- Products
Store
Search
Login

Refrigeration Basics Quiz

December 29, 2016 Bryan Orr 7 Comments

Print Friendly, PDF & Email

Test your skills to see if you are a refrigeration basics pro… or a parts changer

Your email address:

Your name:

Company name:

Question 1 of 10

1. the purpose of the accumulator is ________

To prevent liquid refrigerant from entering the compressor crankcase

To store extra refrigerant for varying load conditions

To keep the compressor from accumulating too much oil

To improve the efficiency of the expansion valve by increasing the rate of flash gas velocity

Question 1 of 10

Question 2 of 10

2. If a refrigeration system with a receiver has a clear sight glass, you know that it is properly charged.

FALSE: A clear sight glass means the system is flat

TRUE: A clear sight glass and a cold suction line means the system is working properly

TRUE: However, you also need to check the Delta T and the wet bulb of the air

FALSE: Beyond a clear glass, a specific amount must be added to allow for changing ambient conditions.

Question 2 of 10

Question 3 of 10

3. What does the ‘X’ terminal on a defrost timer do?

Common Terminal

Timer Power Feed

Defrost termination

Electric Heat

Question 3 of 10

Question 4 of 10

4. What do low ambient control valves do?

Prevents compressor underheating

Reduces the chance of compressor slugging

Maintain a minimum liquid pressure to the TEV.

Maintains suction pressure so the saturation does not fall below 32 degrees Fahrenheit

Question 4 of 10

Question 5 of 10

5. What is the purpose of a receiver?

To keep liquid refrigerant from entering the compressor

To receive vapor and condense it to a liquid

For extra efficiency in an air cooled compressor

To store refrigerant during changing system conditions

Question 5 of 10

Question 6 of 10

6. A cold control senses what to control a unit?

Supply Air temperature

A disturbance in the force

Compressor Temperature

Coil temperature

Question 6 of 10

Question 7 of 10

7. What does a pump down system prevent?

Oil traps

Flooded starts from liquid refrigerant migration during the off cycle

The system from pumping down when the TEV fails

Technician Fatigue from needing to use a refrigeration wrench on every off cycle

Question 7 of 10

Question 8 of 10

8. What does the external equalizer on a TEV do? (versus internally equalized)

connects the valve to the coil

Compensates for pressure drop across evaporator coil

Allows for hot gas bypass

Equalizes pressure when the unit goes off

Question 8 of 10

Question 9 of 10

9. What does a CPR do in a system?

Maintains proper superheat

Prevents overload of the compressor

Helps revive the system

Keeps liquid out of the crankcase

Question 9 of 10

Question 10 of 10

10. An EPR valve sets a maximum pressure for the evaporator

True

False

Question 10 of 10

Loading…

Bryan Orr( Founder / Podcaster / Dad of 10 )

Bryan Orr is a lifelong learner, proud technician and advocate for the HVAC/R Trade

Share this:

Click to share on Twitter (Opens in new window)
Click to share on Facebook (Opens in new window)

refrigeration circuit

7 comments

Joe Reinhard says:
December 30, 2016 at 5:53 pm
Great quiz! And I had just left in prior comment today a request for refrigeration type questions. Troubleshooting type questions would also be appreciated. Thanks for taking time to create these quizzes.
Log in to Reply
1. Bryan Orr says:
  January 2, 2017 at 5:02 pm
  Noted and appreciated. Happy new year Joe.
  Log in to Reply
Terry Henry says:
January 2, 2017 at 10:30 am
There were multiple answers on the 3 I got wrong,haven’t done a whole lot of Refrigeration lately,but they were all right.You need to look at little deeper.Overall good quiz,Jeremy.
Log in to Reply
Kamen Petrov says:
July 3, 2017 at 5:31 pm
great quiz,specially coz i work just amonia plant and english is no my main language its part from preparation for my F gas qualification thank you so much for help
Log in to Reply
Marcos José Alves says:
July 18, 2017 at 6:00 pm
Muito bom o curso. mais muiatas palavras em ingles que não domino mais mesmo assim deu para o gasto, estão de parbéns
Log in to Reply
Darwin says:
January 22, 2018 at 11:51 am
Thanks for the test. Controls are all that I need to get a hold of. Haha. Learning is my goal.
Log in to Reply
rbgoetsch says:
March 28, 2019 at 5:46 pm
Typically, a cold control senses coil temperature in a reach-in to ensure off-cycle defrost. In a walk-in, a cold control normally senses box temperature.
Log in to Reply

Leave a Reply Cancel reply

You must be logged in to post a comment.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Search

Search for:

Translate:

BROUGHT TO YOU BY

Recent Posts

Leak Detector Maintenance and Care
Hot Weather Preparedness / An Open Letter (Surviving a Heat Wave)
RH, DB and WB
Short Cycling
Sensible Heat Ratio (SHR)

Refrigeration Technologies

Viper HD Coil Cleaner is non-toxic, non-flammable and non-odorous. Suitable for use on indoor or outdoor coils, or use as a multipurpose cleaning and degreasing compound. Click to check it out today and use offer code getschooled for a discount.
Viper Condensate Pan and Drain Treatment is a sprayable gel. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips.
One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. Derived from refrigeration grade lubricants. Non-hardening, non-drying fluid which bonds tenaciously to many different substrates. Typically, one drop of Nylog can be stretched about three feet before breaking.

NAVAC

Find out more about the Innovative NAVAC line of Vacuum Pumps
The industry's first smart charging machine, with never before seen features and advanced technology, NAVAC brings smart charging products to the HVAC industry.
Quick, accurate flaring equipped with high-performance, large capacity lithium battery, adjustable speed control and quick-connect, it makes flaring easy and enjoyable, while guaranteeing accurate and consistent flaring.

HVAC Careers

Recent Posts

Leak Detector Maintenance and Care May 19, 2019
Hot Weather Preparedness / An Open Letter (Surviving a Heat Wave) May 18, 2019
RH, DB and WB May 16, 2019

HVAC School YouTube

Sign up for Daily Tech Tips

Email Address*

Name*

* = required field

unsubscribe from list

powered by MailChimp!

© 2017 HVAC School All Rights Reserved. DISCLOSURE: I may be an affiliate for products that I recommend. If you purchase those items through my links I will earn a commission. You will not pay more when buying a product through my link. In fact, I oftentimes am able to negotiate a lower rate (or bonuses) not available elsewhere. Plus, when you order through my link, it helps me to continue to offer you lots of free stuff. :) Thank you, in advance for your support!

Translate »

Daily Tech Tip

Get the (near) daily Tech Tip email right in your inbox!

Email address

Name