HVAC
NATE
/
Heat
/
Pump Exam Questions With Correct Answers
/ / / / / /
On /an /R-
22
/system,
/line
/diameters /and /lengths /are /typically /specified /for /a /vapor /pressure /drop /that /does /not /exceed
/what? /- /verified /answer(s)-✔✔6-7PSI /or /6F
What
/is
/the
/primary /purpose /of /using /flux /when /soldering /copper /or /brass /parts? /- /verified /answer(s)-
✔✔Prevent /Oxidation
The
/water
/that
/results /from /a /defrost /cycle /of /an /air /to /air /heat /pump(runoff) /must? /- /verified /answer(s)-
✔✔Drain /off /and /away /from /the /outdoor /coil.
Why /must /the /runoff /be /drained /off /and /away /from /the /outdoor /coil? /- /verified /answer(s)-
✔✔Excessive /ice /can /build /up /on /the /bottom /of /the /coil /and /can /reduce /capacity.
What
/is
,/the
/component
/that
/reduces /sound /transmission /and /prevents /water /leaks /of /a /package /heat /pump /installed /on /a
/roof? /- /verified /answer(s)-✔✔Curb /Gasket
Why
/do
/you
/need
/to
/add /
a
/control
/for /a /heat /pump /indoor /coil /that /is /installed /on /a /fossil /fuel /furnace? /- /verified /answer(s)-
✔✔So /the /heat /pump /and /furnace /do /not /operate /at /the /same /time /in /normal /heating.
What
/happens
/when
/you
/energize /
a
/hermetic /refrigeration /compressor /and /the /system /is /in /a /deep /vacuum? /- /verified /answer(s)-
✔✔Motor /windings /could /become /damaged.
What
/needs /to /happen /in /order /to /consider /an /evacuation /to /be /complete? /- /verified /answer(s)-
✔✔System /should /be /evacuated /to /a /vacuum /of /500 /Microns /or /below.
A
/system
/is
/supplied
,/from
/the
/factory
/with
/charge
/for /
a
/15
/foot
/line
/set.
/The
/data
/plate
/shows
/the
/required
/system
/charge
/to
/be /
5
/pounds
/10
/ounces.
/The
/line
/set
/uses /
a
/3/8
/inch /liquid /line /and /is /25 /feet /long. /The /manufacturer's /instruction /sheet /specifies /0.6 /ounces
/of
/refrigerant
/to
/be
/added
/for
, /each
/added
/foot
/of
/refrigerant
/line
/length.
/How /much /refrigerant /is /needed /to /completely /charge /the /system? /- /verified /answer(s)-
✔✔6lbs
Where /are /drive /slips /typically /installed? /- /verified /answer(s)-
✔✔On /the /shorter /sides /of /rectangular /duct.
What /is /a /necessary /check /to /properly /set /a /heat /anticipator? /- /verified /answer(s)-
✔✔Heating /control /circuit /amperage /
draw.
A
/heat
/pump
/operating
/in
/normal
/ice
/free
/conditions
/maintains /
a /certain /temperature /difference /between /the /outdoor /coil /temperature /and /the /surrounding
/outdoor /ambient. /What /is /this /temperature /referred /to /as? /- /verified /answer(s)-✔✔Coil /TD.
What
/is
/the
/smallest
NATE
/
Heat
/
Pump Exam Questions With Correct Answers
/ / / / / /
On /an /R-
22
/system,
/line
/diameters /and /lengths /are /typically /specified /for /a /vapor /pressure /drop /that /does /not /exceed
/what? /- /verified /answer(s)-✔✔6-7PSI /or /6F
What
/is
/the
/primary /purpose /of /using /flux /when /soldering /copper /or /brass /parts? /- /verified /answer(s)-
✔✔Prevent /Oxidation
The
/water
/that
/results /from /a /defrost /cycle /of /an /air /to /air /heat /pump(runoff) /must? /- /verified /answer(s)-
✔✔Drain /off /and /away /from /the /outdoor /coil.
Why /must /the /runoff /be /drained /off /and /away /from /the /outdoor /coil? /- /verified /answer(s)-
✔✔Excessive /ice /can /build /up /on /the /bottom /of /the /coil /and /can /reduce /capacity.
What
/is
,/the
/component
/that
/reduces /sound /transmission /and /prevents /water /leaks /of /a /package /heat /pump /installed /on /a
/roof? /- /verified /answer(s)-✔✔Curb /Gasket
Why
/do
/you
/need
/to
/add /
a
/control
/for /a /heat /pump /indoor /coil /that /is /installed /on /a /fossil /fuel /furnace? /- /verified /answer(s)-
✔✔So /the /heat /pump /and /furnace /do /not /operate /at /the /same /time /in /normal /heating.
What
/happens
/when
/you
/energize /
a
/hermetic /refrigeration /compressor /and /the /system /is /in /a /deep /vacuum? /- /verified /answer(s)-
✔✔Motor /windings /could /become /damaged.
What
/needs /to /happen /in /order /to /consider /an /evacuation /to /be /complete? /- /verified /answer(s)-
✔✔System /should /be /evacuated /to /a /vacuum /of /500 /Microns /or /below.
A
/system
/is
/supplied
,/from
/the
/factory
/with
/charge
/for /
a
/15
/foot
/line
/set.
/The
/data
/plate
/shows
/the
/required
/system
/charge
/to
/be /
5
/pounds
/10
/ounces.
/The
/line
/set
/uses /
a
/3/8
/inch /liquid /line /and /is /25 /feet /long. /The /manufacturer's /instruction /sheet /specifies /0.6 /ounces
/of
/refrigerant
/to
/be
/added
/for
, /each
/added
/foot
/of
/refrigerant
/line
/length.
/How /much /refrigerant /is /needed /to /completely /charge /the /system? /- /verified /answer(s)-
✔✔6lbs
Where /are /drive /slips /typically /installed? /- /verified /answer(s)-
✔✔On /the /shorter /sides /of /rectangular /duct.
What /is /a /necessary /check /to /properly /set /a /heat /anticipator? /- /verified /answer(s)-
✔✔Heating /control /circuit /amperage /
draw.
A
/heat
/pump
/operating
/in
/normal
/ice
/free
/conditions
/maintains /
a /certain /temperature /difference /between /the /outdoor /coil /temperature /and /the /surrounding
/outdoor /ambient. /What /is /this /temperature /referred /to /as? /- /verified /answer(s)-✔✔Coil /TD.
What
/is
/the
/smallest
