NATE
Exam
/
Air
/
Conditioning
/
and
/
Heat Pumps Questions With Correct Answers
/ / / / / /
Which /of /the /following /factors /affects /a /customer's /level /of /comfort?
a. /Air /movement
b. /Humidity
c. /Temperature
d.
/All
/of
/the
/above /- /correct /answer(s) /✔✔ /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% /- /correct /answer(s) /✔✔ /c /(+15%)
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% /- /correct /answer(s) /✔✔ /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% /- /correct /answer(s) /✔✔ /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
Note: /3,413 /Btu/kW /- /correct /answer(s) /✔✔ /b /(3.2 /kWh)
The /three /processes /that /transfer /heat /energy /are /conduction, /convection, /and /____.
a. /concentration
b. /radiation
c. /refraction
d. /static /pressure /- /correct /answer(s) /✔✔ /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 /- /correct /answer(s) /✔✔ /b /(conduction)
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 /- /correct /answer(s) /✔✔ /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 /- /correct /answer(s) /✔✔ /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%
d. /135°F, /80% /- /correct /answer(s) /✔✔ /c /(125°F, /80%)
Exam
/
Air
/
Conditioning
/
and
/
Heat Pumps Questions With Correct Answers
/ / / / / /
Which /of /the /following /factors /affects /a /customer's /level /of /comfort?
a. /Air /movement
b. /Humidity
c. /Temperature
d.
/All
/of
/the
/above /- /correct /answer(s) /✔✔ /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% /- /correct /answer(s) /✔✔ /c /(+15%)
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% /- /correct /answer(s) /✔✔ /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% /- /correct /answer(s) /✔✔ /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
Note: /3,413 /Btu/kW /- /correct /answer(s) /✔✔ /b /(3.2 /kWh)
The /three /processes /that /transfer /heat /energy /are /conduction, /convection, /and /____.
a. /concentration
b. /radiation
c. /refraction
d. /static /pressure /- /correct /answer(s) /✔✔ /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 /- /correct /answer(s) /✔✔ /b /(conduction)
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 /- /correct /answer(s) /✔✔ /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 /- /correct /answer(s) /✔✔ /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%
d. /135°F, /80% /- /correct /answer(s) /✔✔ /c /(125°F, /80%)
