NATE Air-to- /
Air
Heat
/
Pump
/
Practice
/
Test 2 Questions With Correct Answers
/ / / / / /
A /good /evacuation /of /a /refrigerant /circuit /to /remove /non-
condensable /will /help /ensure: /- /correct /answer(s) /✔✔ /Higher /efficiency /and /Capacity.
A
/condensing
/unit
/should
/be
/mounted
/on /
a
/slab
/that
/is /level /to /allow: /- /correct /answer(s) /✔✔ /Accumulated /water /to /evenly /run /from /the /cabin.
Low
/airflow
/over /
a
/residential /split /system /air /conditioning /evaporator /can /cause: /- /correct /answer(s) /✔✔ /Liquid
/flood-back /to /the /compressor.
,Which
/of
/the
/following
/is
/the
/correct
/sequence
/of
/work: /-
/correct
/answer(s)
/✔✔
/Attach
/the
/gauge
/manifold,
/recover /refrigerant, /replace /the /filter /core, /evacuate /the /system, /recharge /the /system.
As
/the
/pressure
/on
/the
/liquid
/is /increased, /the /vaporization /temperature /of /the /liquid: /- /correct /answer(s) /✔✔ /Increases.
An /oil-separator /must /be /mounted: /- /correct /answer(s) /✔✔ /Level.
Which
/of
/the
/following
/metering /devices /controls /evaporator /pressure: /- /correct /answer(s) /✔✔ /None /of /these.
, The
/purpose /of /the /external /equalizer /on /the /thermostatic /expansion /valve /is: /- /correct /answer(s)
/✔✔ /To /equalize /evaporator /pressure /drop /with /respect /to /the /TEV.
The /higher /the /MERV /rating /of /a /filter-
drier, /the: /- /correct /answer(s) /✔✔ /MERV /does /not /apply /to /filter-driers.
Zeolite /is /used /with: /- /correct /answer(s) /✔✔ /Refrigerant /filter /driers.
Vacuum
/pressures
/are /measured /in: /- /correct /answer(s) /✔✔ /Microns, /Millimeters /or /Inches /of /mercury.
The /number /25,400 /relates /to: /- /correct /answer(s) /✔✔ /Microns/Inch.
A /general /rule /of /thumb /for /airflow: /- /correct /answer(s) /✔✔ /400 /CFM/Ton.
A
/double
/suction
/riser /is /used /to: /- /correct /answer(s) /✔✔ /Improve /oil /return /as /system /capacity /changes.
A
/service
/technician
/measures /
a
/return
/air
/temperature
/of
/80
Air
Heat
/
Pump
/
Practice
/
Test 2 Questions With Correct Answers
/ / / / / /
A /good /evacuation /of /a /refrigerant /circuit /to /remove /non-
condensable /will /help /ensure: /- /correct /answer(s) /✔✔ /Higher /efficiency /and /Capacity.
A
/condensing
/unit
/should
/be
/mounted
/on /
a
/slab
/that
/is /level /to /allow: /- /correct /answer(s) /✔✔ /Accumulated /water /to /evenly /run /from /the /cabin.
Low
/airflow
/over /
a
/residential /split /system /air /conditioning /evaporator /can /cause: /- /correct /answer(s) /✔✔ /Liquid
/flood-back /to /the /compressor.
,Which
/of
/the
/following
/is
/the
/correct
/sequence
/of
/work: /-
/correct
/answer(s)
/✔✔
/Attach
/the
/gauge
/manifold,
/recover /refrigerant, /replace /the /filter /core, /evacuate /the /system, /recharge /the /system.
As
/the
/pressure
/on
/the
/liquid
/is /increased, /the /vaporization /temperature /of /the /liquid: /- /correct /answer(s) /✔✔ /Increases.
An /oil-separator /must /be /mounted: /- /correct /answer(s) /✔✔ /Level.
Which
/of
/the
/following
/metering /devices /controls /evaporator /pressure: /- /correct /answer(s) /✔✔ /None /of /these.
, The
/purpose /of /the /external /equalizer /on /the /thermostatic /expansion /valve /is: /- /correct /answer(s)
/✔✔ /To /equalize /evaporator /pressure /drop /with /respect /to /the /TEV.
The /higher /the /MERV /rating /of /a /filter-
drier, /the: /- /correct /answer(s) /✔✔ /MERV /does /not /apply /to /filter-driers.
Zeolite /is /used /with: /- /correct /answer(s) /✔✔ /Refrigerant /filter /driers.
Vacuum
/pressures
/are /measured /in: /- /correct /answer(s) /✔✔ /Microns, /Millimeters /or /Inches /of /mercury.
The /number /25,400 /relates /to: /- /correct /answer(s) /✔✔ /Microns/Inch.
A /general /rule /of /thumb /for /airflow: /- /correct /answer(s) /✔✔ /400 /CFM/Ton.
A
/double
/suction
/riser /is /used /to: /- /correct /answer(s) /✔✔ /Improve /oil /return /as /system /capacity /changes.
A
/service
/technician
/measures /
a
/return
/air
/temperature
/of
/80
