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? /- /correct /answer(s) /✔✔ /6-7PSI /or /6F
What
/is
/the
/primary /purpose /of /using /flux /when /soldering /copper /or /brass /parts? /- /correct /answer(s) /✔✔
/Prevent /Oxidation
The
/water
/that
/results
/from /
a
/defrost
/cycle
/of
/an
/air
/to
,/air
/heat /pump(runoff) /must? /- /correct /answer(s) /✔✔ /Drain /off /and /away /from /the /outdoor /coil.
Why
/must
/the
/runoff
/be
/drained
/off
/and
/away
/from
/the
/outdoor
/coil? /-
/correct
/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? /- /correct /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? /-
/correct
/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? /- /correct /answer(s)
/✔✔ /Motor /windings /could /become /damaged.
What
/needs
/to
/happen
/in
/order
/to
/consider
/an
/evacuation
, /to
/be
/complete? /-
/correct /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
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? /- /correct /answer(s) /✔✔ /6-7PSI /or /6F
What
/is
/the
/primary /purpose /of /using /flux /when /soldering /copper /or /brass /parts? /- /correct /answer(s) /✔✔
/Prevent /Oxidation
The
/water
/that
/results
/from /
a
/defrost
/cycle
/of
/an
/air
/to
,/air
/heat /pump(runoff) /must? /- /correct /answer(s) /✔✔ /Drain /off /and /away /from /the /outdoor /coil.
Why
/must
/the
/runoff
/be
/drained
/off
/and
/away
/from
/the
/outdoor
/coil? /-
/correct
/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? /- /correct /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? /-
/correct
/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? /- /correct /answer(s)
/✔✔ /Motor /windings /could /become /damaged.
What
/needs
/to
/happen
/in
/order
/to
/consider
/an
/evacuation
, /to
/be
/complete? /-
/correct /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
