Information top top High Pressure exercise Test 1

This is the an initial of 4 in our collection of free practice tests on handling refrigerants in high-pressure appliances and servicing high-pressure refrigeration equipment. Our practice tests are amongst the ideal mobile-friendly exam on the web and also
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You are watching: Heat pumps that use r410a should be leak checked with

* NOTE: having a pressure-temperature reference for generally used refrigerants is compelled to answer some of the inquiries on our practice tests uneven you have actually an remarkable memory.

This exercise test is free. Take it it as regularly as you like.Contains 25 questions.Pressing the send button automatically returns your resulting score.Passing score is 70%. (18 out of 25)Correct answer details is provided for questions answered incorrectly.Good luck!
Trade Category:
" class="glossaryLink ">HVACR
Test Category:EPA 608 Certification
Test Subject:Type II (High-Pressure / an extremely High-Pressure)
Test Number:1 that 4
Questions on Test:25
Passing Score:70%

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Electrical Code...

Pressurized

The procedure of providing an enclosure through a safety gas through or without consistent flow, at adequate pressure to protect against the entrance of flammability dust or ignitable fibers/flyings.

(National electric Code® 100-1)


Mechanical Code...

Should

Indicates a referral or that which is advised yet not required.

(Uniform mechanical Code® 221.0)


Correct prize is C: pressurized nitrogen.

Heat pumps that have been retrofitted indigenous R-22 to R-407C should be leak checked through pressurized nitrogen.


#3. To adjust the compressor on a device containing R-410A, you have to isolate the compressor and also then


evacuate the isolated section of the mechanism to atmospheric pressure and also hold. If the mechanism pressure does no rise, remove the compressor.
evacuate the isolated ar of the system to atmospheric pressure and hold. If the device pressure does not rise, eliminate the compressor.
evacuate the isolated ar of the system to 10 inch of vacuum and also hold. If the system pressure does not rise, remove the compressor.
evacuate the isolated section of the mechanism to 10 inch of vacuum and also hold. If the device pressure does no rise, remove the compressor.
evacuate the isolated ar of the device to 15 inches of vacuum and hold. If the mechanism pressure does no rise, eliminate the compressor.
evacuate the isolated ar of the device to 15 inches of vacuum and hold. If the system pressure does not rise, remove the compressor.
Electrical Code...

Isolated (as applied to location)

Not readily available to persons uneven special way for access are used.

(National electric Code® 100-1)


" class="glossaryLink ">isolated section of the system to atmospheric pressure and hold. If the device pressure does not rise, remove the compressor.

To adjust the compressor top top a system containing R-410A, you have to isolate the compressor and then evacuate the isolated section of the system to atmospheric pressure and also hold. If the system pressure does not rise, remove the compressor.


Electrical Code...

Service

The conductors and equipment because that delivering electrical energy indigenous the serving utility to the wiring system of the basic served.

(National electric Code® 100-1)


" class="glossaryLink ">service valve.

The technique to fee a mechanism that has a common charge of 80 pounds is to charge with liquid v the fluid line organization valve.


Correct answer is D: pressurized through nitrogen, climate leak checked.

After surroundings of a field-piped R-410A separation
Mechanical Code...

Heat Pump

A refrigeration mechanism that extracts warm from one substance and also transfers it come another portion of the very same substance or to a 2nd substance at a higher temperature for a helpful purpose.

(Uniform mechanically Code® 210.0)


" class="glossaryLink ">heat pump, the unit should very first be pressurized through nitrogen, climate leak checked.

#7. As soon as charging one R-12 refrigeration device that provides a water-cooled condenser, friend must an initial charge v vapor come a push of at least _____ prior to switching to liquid charging.


Mechanical Code...

Condenser

The part of the device designed to liquify refrigerant vapor by remove of heat.

(Uniform mechanically Code® 205.0)


" class="glossaryLink ">condenser, girlfriend must an initial charge with vapor come a pressure of at least 35 psig before switching to liquid charging.

#8. Her recovery/recycling machine has R-22 refrigerant in it. Friend now have to recover refrigerant from a unit with R-410A. What must be done prior to your restore unit can be supplied to recuperate R-410A?


Correct prize is D: all of the above.

Your recovery/recycling maker has R-22 refrigerant in it. Girlfriend now have to recover refrigerant native a unit with R-410A. You need to comply with the following before your restore unit can be supplied to recoup R-410:

The recovery tank need to be designed for the push of R-410A.The filter and lubricant in the recovery unit have to be adjusted and the recovery unit evacuated.
wait to see if the mechanism pressure rises indicating that there is quiet refrigerant in liquid type or refrigerant trapped in the oil.
wait to watch if the mechanism pressure rises indicating that there is quiet refrigerant in liquid form or refrigerant trapped in the oil.

Correct prize is D: wait to watch if the mechanism pressure rises indicating the there is tho refrigerant in liquid kind or refrigerant trapped in the oil.

After reaching the required recovery vacuum on a device you have to wait to check out if the system pressure rises indicating the there is quiet refrigerant in liquid type or refrigerant trapped in the oil.


Mechanical Code...

Evaporator

That part of a refrigeration mechanism in which fluid refrigerant is vaporized to develop refrigeration.

(Uniform mechanically Code® 207.0)


Electrical Code...

Energized

Electrically linked to, or is, a source of voltage.

(National electric Code® 100-1)


Correct price is D: 4000 psig explode pressure and also a 800 psig functioning pressure.

R-410A needs a high-pressure manifold gauge and also hose set. Castle must have actually a4000 psig burst pressure and a 800 psig working pressure.


#13. The refrigerant push inside one R-410A unit i beg your pardon is at room temperature (72F) and also not operating is


Correct price is C: approximately 210 psig.

The refrigerant push inside an R-410A unit i m sorry is at room temperature (72F) and not operation is roughly 210 psig.


Mechanical Code...

Stop Valve

A maker in a piping system to shut off the circulation of the fluid.

(Uniform mechanical Code® 224.0)


Mechanical Code...

Pressure-Relief Device

A pressure-actuated valve or rupture member or fusible plug designed to automatically relieve too much pressure.

(Uniform mechanical Code® 218.0)


" class="glossaryLink ">pressure relief device.

Every air conditioning or refrigeration system should be safeguarded by a pressure relief
Electrical Code...

Device

A unit that an electric system, various other than a conductor, that carries or controls electric energy as its primary function.

(National electric Code® 100-1)


#15. To adjust the compressor ~ above a system containing 40 pounds that R-500 using a recycling machine that was produced AFTER November 15 1993, you need to isolate the compressor climate


evacuate the isolated section of the device to 10 inches of vacuum and hold. If system pressure does not rise, remove the compressor.
evacuate the isolated ar of the mechanism to 10 inches of vacuum and also hold. If mechanism pressure does no rise, eliminate the compressor.
evacuate the isolated ar of the mechanism to 15 inch of vacuum and hold. If system pressure does no rise, eliminate the compressor.
evacuate the isolated ar of the device to 15 inches of vacuum and hold. If mechanism pressure does no rise, eliminate the compressor.

Correct prize is C: evacuate the isolated section of the system to 10 inches of vacuum and also hold. If mechanism pressure does no rise, remove the compressor.

To readjust the compressor on a mechanism containing 40 pounds the R-500 utilizing a recycling device that was manufactured AFTER November 15 1993, you must isolate the compressor then evacuate the isolated ar of the device to 10 customs of vacuum and also hold. If system pressure does no rise, remove the compressor.


Correct price is D: traces the oil.

When inspecting a system for leaks, you should look for traces the oil.


Correct price is B: pressurize the system with an inert gas and also leak check.

When a brand-new system has actually been assembled, the very first thing to perform is pressurize the system with one inert gas and also leak check.


Correct price is A: R-410A behaves as a near azeotropic refrigerant and can be topped off.

R-410A is various from other ASHRAE 400 series non-azeotropic blends because R-410A behaves as a close to azeotropic refrigerant and also can it is in topped off.


Correct price is D: minimize the relax of refrigerant as soon as the hoses are connected and also disconnected.

Manifold gauge set hoses should have actually self-sealing connectors or hand valves to minimize the release of refrigerant as soon as the hoses are connected and also disconnected.


#20. Once using recovery or recycling tools that was produced AFTER November 15 1993, you must evacuate a system containing more than 200 pounds of CFC-12 come _______ prior to making a major repair.


Electrical Code...

Equipment

A basic term, consisting of fittings, devices, appliances, luminaires, apparatus, machinery, and also the like supplied as a component of, or in connection with, an electric installation.

(National electrical Code® 100-1)


Mechanical Code...

Equipment

A general term including materials, fittings, devices, appliances, and also apparatus offered as component of or in link with installations regulated by this code.

(Uniform mechanically Code® 207.0)


" class="glossaryLink ">equipment the was produced AFTER November 15 1993, you should evacuate a device containing an ext than 200 pounds that CFC-12 come 15 inch of Hg vacuum before making a significant repair.

#21. With an air-cooled condenser on the roof of a building and also the evaporator top top the very first floor, restore should very first occur


Correct prize is C: from the fluid line start the evaporator.

With an air-cooled condenser ~ above the roof the a
Electrical Code...

Building

A framework that stand alone or the is separated from adjoining frameworks by fire walls.

(National electric Code® 100-1)


Plumbing Code...

Building

Any structure lived in or to plan for sustaining or sheltering any occupancy.

(International pipes Code® 202.0)


" class="glossaryLink ">building and also the evaporator on the an initial floor, recovery should an initial occur from the liquid line beginning the evaporator.

Electrical Code...

Exposed (as applied to live parts)

Capable of being inadvertently touch or approached nearer 보다 a safe distance by a person.

Informational Note: This term uses to parts that room not suitably guarded, isolated, or insulated.

Exposed (as applied to wiring methods)

On or attached to the surface or behind panels designed to permit access.

(National electrical Code® 100-1)


Correct answer is A: explode when mixed with waiting or oxygen.

Never use oxygen or compressed air come leak check equipment due to the fact that R-410A can explode when blended with air or oxygen.


#23. Dried nitrogen have to be supplied to rest the an initial vacuum when dehydrating through the double evacuation method. However, it


Correct prize is D: can be dangerous if not supplied with a pressure regulator.

Dry nitrogen have to be provided to break the very first vacuum as soon as dehydrating by the twin evacuation method. However, it deserve to be danger if not used with a pressure regulator.


#24. A recovery device that provides a hermetic compressor will certainly overheat when illustration a deep vacuum because


Correct price is B: the motor demands the flow of refrigerant through the compressor to administer motor
Mechanical Code...

Cooling

Air cooling to administer a room or an are temperature the 68°F (20°C) or above.

(Uniform mechanical Code® 205.0)


" class="glossaryLink ">cooling.

A recovery maker that uses a hermetic compressor will overheat when illustration a deep vacuum since the motor needs the circulation of refrigerant v the compressor to carry out motor cooling.


#25. The suitable charging an approach for blended (non-azeotropic) refrigerants (400 series) is to remove the fee from the cylinder as a


Correct answer is B: liquid.

See more: What Is That Fuzzy Caterpillar That Looks Like Tree Bark Stock Photos And Images

The ideal charging technique for mixed (non-azeotropic) refrigerants (400 series) is to remove the charge from the cylinder together a liquid.


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