100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
NATE Exam: Air Conditioning and Heat Pumps/ 95 Q&A/ . $9.69
Add to cart
Quickly navigate to
Preview
  2.  
  3. NATE
  4.  
  5. NATE

Exam (elaborations)

NATE Exam: Air Conditioning and Heat Pumps/ 95 Q&A/ .

 0 purchase
  • Course
  • NATE
  • Institution
  • NATE

NATE Exam: Air Conditioning and Heat Pumps/ 95 Q&A/ . The three processes that transfer heat energy are conduction, convection, and ____. a. concentration b. radiation c. refraction d. static pressure - Answer: b (radiation) Heat transfer that occurs when substances of different temperatu...

[Show more]

Preview 4 out of 35  pages

Document information

  • October 20, 2024
  • 35
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • NATE
  • NATE

Seller

avatar-seller
docmickey

Reviews received

Content preview

NATE Exam: Air Conditioning and Heat Pumps/
95 Q&A/ 2024-2025.
The three processes that transfer heat energy are conduction, convection, and
____.
a. concentration
b. radiation
c. refraction
d. static pressure - Answer: b (radiation)


Heat transfer that occurs when substances of different temperatures are in
contact with each other is called ____.


a. concentration
b. conduction
c. convection
d. radiation - Answer: b (conduction)
Page 1 of 35

,What effect does raising the pressure in a sealed system have on refrigerant?


a. It becomes more difficult to subcool the liquid refrigerant
b. It becomes more difficult to superheat the refrigerant vapor
c. The refrigerant's boiling point decreases
d. The refrigerant's boiling point increases - Answer: d (The refrigerant's boiling
point increases)


What is the primary danger to people near an accidental refrigerant release or
spill?


a. Blurred vision caused by the refrigerant vapor coming in contact with the eyes
b. Changes in weather patterns caused by global warming
c. Damage to the food chain caused by decreased ozone levels in the stratosphere
d. Suffocation caused by the heavier refrigerant displacing oxygen in the air -
Answer: d (Suffocation caused by the heavier refrigerant displacing oxygen in the
air)


The maximum temperature at which refrigerant may be stored is ____°F when the
container is no more than ____% full of liquid by volume.


a. 120°F, 60%
b. 125°F, 60%
c. 125°F, 80%

Page 2 of 35

,d. 135°F, 80% - Answer: c (125°F, 80%)


Boiling of the refrigerant occurs in which system component?


a. Compressor
b. Condenser
c. Evaporator
d. Metering device - Answer: c (Evaporator)


Which of the following factors affects a customer's level of comfort?


a. Air movement
b. Humidity
c. Temperature
d. All of the above - Answer: d (All of the above: air movement, humidity,
temperature)


A cooling load calculation estimates the sensible heat gain of a structure. The
maximum sensible capacity of a cooling-only system should be within ____% of
this calculated value.


a. ±10%
b. +10%
c. +15%
d. +30% - Answer: c (+15%)

Page 3 of 35

, The maximum sensible cooling capacity of a heat pump should be within ____% of
the calculated sensible heat gain of a structure with a large heating load.


a. ±10%
b. +15%
c. -25%
d. +25% - Answer: d (+25%)


The combined output of a heat pump and its auxiliary heat should not exceed the
calculated heat loss of a home by more than ____%.


a. 10%
b. 15%
c. 20%
d. 25% - Answer: b (15%)


What amount of auxiliary electric heat is needed when the output of a heat pump
on a design day equals 18,800 Btuh and the heat loss of a home is 29,700 Btuh?


a. 2.1 kWh
b. 3.2 kWh
c. 5.0 kWh
d. 10.9 kWh



Page 4 of 35

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller docmickey. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $9.69. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67479 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$9.69
  • (0)
Add to cart
Added