NATE
Heat
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Pumps Exam Questions With Correct Answers
/ / / / / /
What /is /the /purpose /of /the /reversing /valve /on /an /air-to-air /heat /pump: /- /verified /answer(s)-
✔✔It
/changes
/the /flow /of /the /refrigerant, /making /the /indoor /coil /the /condenser /during /the /winter /months
On /a /reversing-valve /solenoid, /what /is /connected /to /the /top /tube: /- /verified /answer(s)-
✔✔the /compressor /discharge /line
On /a /reversing-
valve /solenoid, /what /is /connected /to /the /bottom /center /tube: /- /verified /answer(s)-
✔✔the /compressor /suction /line
What
/pressure
/difference
/must
/be
/between
/the
/low
/side
/and
/the
/high
/side
/of /the /heat /pump /system /for /the /reversing /valve /to /operate /properly: /- /verified /answer(s)-
✔✔75 /psig
, Where /are /the /check /valves /located /on /an /air-to-air /heat /pump: /- /verified /answer(s)-
✔✔on /the /outdoor /coil /and /indoor /coil
How /are /the /check /valves /connected /in /a /heat /pump /system: /- /verified /answer(s)-
✔✔in
/parallel
/with /both /metering /devices+in /series /with /one /metering /device /and /parallel /with /the /other
A /ball-type /check /valve /must /be /installed: /- /verified /answer(s)-
✔✔vertically, /with /the /seat /on /the /bottom /of /the /valve
When /installing /a /ball-
type /check /valve, /what /must /be /done /to /prevent /warping: /- /verified /answer(s)-
✔✔A /heat /sink /must /be /used /when /brazing /it /into /the /line
Where /is /the /accumulator /located /on /a /heat /pump /system: /- /verified /answer(s)-
✔✔between /the /bottom /center /tube /of /the /reversing /valve /and /the /compressor
When
/would /you /most /likely /find /liquid /in /the /vapor /line /on /a /heat /pump: /- /verified /answer(s)-
✔✔during /the /heating /mode /after /a /defrost
What /component /must /always /be /de-
energized /during /the /defrost /cycle /on /a /heat /pump: /- /verified /answer(s)-✔✔the /outdoor /fan
Why /are /the /auxiliary /strip /heaters /energized /during /the /defrost /cycle: /- /verified /answer(s)-
✔✔to /increase /supply-air /temperature /for /comfort
Heat
/
Pumps Exam Questions With Correct Answers
/ / / / / /
What /is /the /purpose /of /the /reversing /valve /on /an /air-to-air /heat /pump: /- /verified /answer(s)-
✔✔It
/changes
/the /flow /of /the /refrigerant, /making /the /indoor /coil /the /condenser /during /the /winter /months
On /a /reversing-valve /solenoid, /what /is /connected /to /the /top /tube: /- /verified /answer(s)-
✔✔the /compressor /discharge /line
On /a /reversing-
valve /solenoid, /what /is /connected /to /the /bottom /center /tube: /- /verified /answer(s)-
✔✔the /compressor /suction /line
What
/pressure
/difference
/must
/be
/between
/the
/low
/side
/and
/the
/high
/side
/of /the /heat /pump /system /for /the /reversing /valve /to /operate /properly: /- /verified /answer(s)-
✔✔75 /psig
, Where /are /the /check /valves /located /on /an /air-to-air /heat /pump: /- /verified /answer(s)-
✔✔on /the /outdoor /coil /and /indoor /coil
How /are /the /check /valves /connected /in /a /heat /pump /system: /- /verified /answer(s)-
✔✔in
/parallel
/with /both /metering /devices+in /series /with /one /metering /device /and /parallel /with /the /other
A /ball-type /check /valve /must /be /installed: /- /verified /answer(s)-
✔✔vertically, /with /the /seat /on /the /bottom /of /the /valve
When /installing /a /ball-
type /check /valve, /what /must /be /done /to /prevent /warping: /- /verified /answer(s)-
✔✔A /heat /sink /must /be /used /when /brazing /it /into /the /line
Where /is /the /accumulator /located /on /a /heat /pump /system: /- /verified /answer(s)-
✔✔between /the /bottom /center /tube /of /the /reversing /valve /and /the /compressor
When
/would /you /most /likely /find /liquid /in /the /vapor /line /on /a /heat /pump: /- /verified /answer(s)-
✔✔during /the /heating /mode /after /a /defrost
What /component /must /always /be /de-
energized /during /the /defrost /cycle /on /a /heat /pump: /- /verified /answer(s)-✔✔the /outdoor /fan
Why /are /the /auxiliary /strip /heaters /energized /during /the /defrost /cycle: /- /verified /answer(s)-
✔✔to /increase /supply-air /temperature /for /comfort
