Exam (elaborations)
EPA 608 (TYPE II) EXAM QUESTIONS AND ANSWERS
- Course
- Institution
EPA 608 (TYPE II) EXAM QUESTIONS AND ANSWERS
[Show more]
Content preview
EPA 608 (TYPE II) EXAM QUESTIONSAND ANSWERS
When a new system has been assembled, the first thing to do is? - Answer-Pressurize
the system with an inert gas & leak check.
After installation of a field-piped R-410A split heat pulp, the unit should first be? -
Answer-Pressurized with nitrogen then leak checked.
The EPA regulations require that any appliances containing more than 50 pounds of
refrigerant (except for commercial & industrial process refrigeration) must be repaired
when the leak rate exceeds _________ of the charge per year? - Answer-15%
R-410A requires recovery tanks rated for at least? - Answer-400 psig
After refrigerant liquid has been recovered from a system, any remaining vapor is? -
Answer-Condensed by the recovery system.
Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover
refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be
recovered/recycled? - Answer-Recover as much R-502 from the recovery unit as
possible, change filter, & evacuate.
In a refrigeration system with a TXV (or other type of throttling device), the component
directly following the condenser is the? - Answer-Receiver
When charging an R-410A system that uses a water-cooled condenser, you must first
charge with vapor to a pressure of at least________, before switching to liquid charging.
- Answer-120 psig
Recovered refrigerant may contain what? - Answer-1.) Acids
2.) Moisture
3.) Oils
Your recovery/recycling machine has R-22 refrigerant in it. You now have to recover
refrigerant from a unit with R-410A. What must be done before your recovery unit can
be used to recover R-410A? - Answer-1.) The recovery unit must be EPA certified for
use with R-410A.
2.) The recovery tank must be designed for the pressure of R-410A.
, 3.) The filter & lubricant in the recovery unit must be changed, & the recovery unit
evacuated.
To recover liquid refrigerant, you must connect one hose to the? - Answer-Liquid Line.
The proper charging method for blended (non-azeotropic) refrigerants (400 Series) is to
use a remove the charge from the cylinder as a? - Answer-Liquid
Before using a recovery unit to remove a charge, what steps should be taken? -
Answer-1.) Check service valve positions.
2.) Check the oil level in the recovery unit.
3.) Evacuate recovery unit & recovery tank.
On refrigeration units that use an open compressor; the ________ is most likely to leak
if the unit is not used for several months. - Answer-The rotating shaft seal.
Noncondensables in a system cause? - Answer-Higher discharge pressure.
Heat Pumps that use R-410A should be leak checked with? - Answer-Pressurized
Nitrogen.
A reciprocating compressor should not be energized when? - Answer-The discharge
service valve is closed.
In a refrigeration system, the component directly following the evaporator is the? -
Answer-Accumulator.
Manifold gauge set hoses should have self-sealing connectors or hand valves to? -
Answer-Minimize the release of refrigerant when the hoses are connected &
disconnected.
The EPA regulations require that leaking commercial or industrial process refrigeration
equipment must be repaired when the leak rate exceeds _____ of the charge per year. -
Answer-35%
Moisture is removed from a system by? - Answer-Using a filter drier.
Oil foaming usually occurs in the? - Answer-Compressor
R-410A is different from other ASHRAE 400 series non-azeotropic blends because? -
Answer-R-410A behaves as a near azeotropic refrigerant, & can be topped off.
With an air-cooled condenser on the roof of a building & the evaporator on the first floor,
recovery should first occur? - Answer-From the liquid line entering the evaporator.
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 or Stuvia-credit 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 biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now