Exam (elaborations)
NATE Heat Pump Exam Questions with Verified Answers
NATE Heat Pump Exam Questions with Verified Answers
[Show more]
Content preview
NATE Heat Pump Exam Questionswith Verified Answers
R-22 vapor line diameters and lengths are typically specified for a... - -Vapor
pressure drop that does not exceed a 6-7psi or 6 degrees F
-The primary purpose of using flux when soldering copper or brass parts is...
- -To prevent oxidation
-The water that results from a defrost cycle of an air to air heat
pump(runoff) must... - -Drain off and away fro the outdoor coil to prevent
excessive ice build up on the bottom of the coil and reduce capacity
-The component used to reduce sound transmission and prevent water leaks
of a packaged heat pump installed on a roof is... - -Curb Gasket
-On some installations, a heat pump indoor coil can be installed on an
existing, operable, fossil fuel furnace. When this type of installation is done,
you need to add a control so that... - -The furnace and heat pump do not
operate at the same time in normal heating
-When under a deep vacuum, a hermetic refrigeration compressor's motor
windings could be... - -Damaged if energized
-In order for an evacuation to be considered complete... - -A heat pump
refrigeration circuit should be evacuated to a vacuum pressure of 500
microns or below
-A system is supplied from the factory with charge for a 15 FOOT LINESET.
The data plate shows the required system charge to be 5 POUNDS 10
OUNCES. The lineset uses 3/8 inch liquid line and is 25 FEET LONG. The
manufacturers instruction sheet specifies 0.6 ounces of refrigerant to be
added for each added foot of refrigerant line length so... - -The total
refrigerant charge for the system would be 6 pounds
-Drive slips are typically installed on the... - -Shorter sides of rectangular
duct
-To properly set a heat anticipator, it is necessary to... - -Check the 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... - -This temperature difference is referred to
as coil TD
-The smallest refrigerant leak that an electronic leak detector should be
capable of sensing is... - -1/2 an ounce a year
-When checking the pressures in an operating system with a manifold gauge
set... - -Refrigerant oil in a hose will have no effect on the gauge reading
-At sea level, a gauge pressure of 35 psig is equal to an... - -Absolute
pressure of 49,7 psia
-A technician measures the return air temperature of a 100,000 Btu output
furnace to be 65F and the supply side air temperature is 135F... - -The CFM
should be 1323
-A residential supply diffuser that is noisy because of a loose vane is best
serviced by... - -Replacing the diffuser
-When performing preventive maintenance on a heat pump the technician
should check the outdoor fan to be certain that the... - -Fan runs freely with
no binding
-What is the effect of 170 volts supplied to a 208/230 volt compressor... - -
Would cause a current 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... - -The most likely cause would
be the liquid line is restricted
-A reason for cool air complaints when a heat pump is operating in the
heating cycle... - -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 temp.- 92F
Heat pump only return air temp.-70F
Outdoor temp.-54F
Supply air temp./ AUX heat ON- 115F
Return air temp./ AUX heat ON- 70F
CFM- 1228 - -The heating capacity of the unit in would be 29,177
-A dirty or clogged air filter in an operating heat pump system can cause... -
-Inadequate heating
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.32. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now