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HVAC NATE Heat Pump Exam 2023 Correctly Answered!100% Pass Guarantee!!
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HVAC NATE Heat Pump Exam 2023 Correctly Answered!100% Pass Guarantee!!
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HVACNATE
Heat
Pump
Exam
2023
Correctly
Answered!
On
an
R-22
system,
line
diameters
and
lengths
are
typically
specified
for
a
vapor
pressure
drop
that
does
not
exceed
what?
-
ANSWER
6-7PSI
or
6F
What
is
the
primary
purpose
of
using
flux
when
soldering
copper
or
brass
parts?
-
ANSWER
Prevent
Oxidation
The
water
that
results
from
a
defrost
cycle
of
an
air
to
air
heat
pump(runoff)
must?
-
ANSWER
Drain
off
and
away
from
the
outdoor
coil.
Why
must
the
runoff
be
drained
off
and
away
from
the
outdoor
coil?
-
ANSWER
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?
-
ANSWER
Curb
Gasket
Why
do
you
need
to
add
a
control
for
a
heat
pump
indoor
coil
that
is
installed
on
a
fossil
fuel
furnace?
-
ANSWER
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?
-
ANSWER
Motor
windings
could
become
damaged.
What
needs
to
happen
in
order
to
consider
an
evacuation
to
be
complete?
-
ANSWER
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?
-
ANSWER
6lbs
Where
are
drive
slips
typically
installed?
-
ANSWER
On
the
shorter
sides
of
rectangular
duct.
What
is
a
necessary
check
to
properly
set
a
heat
anticipator?
-
ANSWER
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?
-
ANSWER
Coil
TD. What
is
the
smallest
refrigerant
leak
that
an
electronic
leak
detector
should
be
capable
of
sensing?
-
ANSWER
.o5oz
per
year.
When
checking
the
pressures
in
an
operating
system
with
a
manifold
gauge
set,
will
refrigerant
oil
in
a
hose
will
have
an
effect
on
the
gauge?
-
ANSWER
No
What
is
the
absolute
pressure
at
sea
level
if
a
gauge
pressure
is
35
psig?
-
ANSWER
49.7psia
100,000
BTUH
output
furnace.
Return
air
temp
is
65F.
Supply
air
is
135F.
What
is
the
CFM?
-
ANSWER
1323CFM
What
is
the
best
method
of
repair
when
a
residential
supply
diffuser
is
noisy
because
of
a
loose
vane?
-
ANSWER
Replace
the
diffuser.
When
performing
preventive
maintenance
on
a
heat
pump
what
should
the
technician
check
and
why?
-
ANSWER
Outdoor
fan.
To
be
certain
it
runs
freely
with
no
binding.
What
is
the
effect
of
170
volts
supplied
to
a
208/230
volt
compressor?
-
ANSWER
Would
cause
the
current
to
increase
and
the
motor
may
trip
on
overload.
On
a
service
call
for
a
cooling
problem
with
a
heat
pump,
your
inspections
find
a
liquid
line
that
has
condensation
on
it.
What
is
most
likely
to
cause
this?
-
ANSWER
Restriction
in
the
liquid
line.
What
is
a
reason
for
cool
air
complaints
when
a
heat
pump
is
operating
in
the
heating
cycle?
-
ANSWER
Excessive
supply
air
velocities.
The
following
measurements
are
recorded
on
an
operating
heat
pump
system.
The
heat
pump
is
operating
with
the
compressor
only
with
no
auxiliary
heat:
•
Heat
pump
only
supply
air
temperature
92°F
•
Heat
pump
only
return
air
temperature
70°F
•
Outdoor
temperature
54°F
•
Supply
air
temp.
/auxiliary
heat
ON
115°F
•
Return
air
temp.
/auxiliary
heat
ON
70°F
•
CFM
1228
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