Epa Test Review 2018 Type Ii

Front 1

Which of the following should be replaced if a system is opened for servicing?

Back 1

Filter drier

Front 2

What level of vacuum should be pulled when evacuating a vapor compression system to assure all moisture has been removed?

Back 2

500 microns

Front 3

What would be the approximate refrigerant pressure of an R-410A machine at (80°F) room temperature while the machine is idle?

Back 3

238 psig

Front 4

What is a deep vacuum usually measured in?

Back 4

Microns

Front 5

What will back-seating a suction shutoff valve close?

Back 5

Gauge port

Front 6

What is a moisture indicating sight glass useful for?

Back 6

Checking for moisture in refrigerant.

Front 7

Which of the following components is located after the evaporator?

Back 7

Accumulator

Front 8

What will non-condensables in a refrigeration system result in?

Back 8

Higher discharge pressure

Front 9

What is the evaporation temperature of R-134a at 0 psig?

Back 9

-15°F

Front 10

Which of the following is a reason to take an oil sample?

Back 10

The unit has had a compressor burnout

Front 11

When could a reciprocating compressor be damaged if energized?

Back 11

When the discharge service valve is closed.

Front 12

It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. However, it;

Back 12

Requires a pressure regulator

Front 13

Every refrigerating system must be protected by which of the following?

Back 13

A pressure relief device

Front 14

An operating unit that has a receiver/storage tank requires refrigerant system service. When servicing the unit;

Back 14

Refrigerant should be pumped down to and isolated in the receiver.

Front 15

How long must an HVAC servicing company keep records for each disposed appliance with a charge between 5 and 50 pounds?

Back 15

3 years

Front 16

What should be done after reaching the required recovery vacuum on an appliance?

Back 16

Wait for at least a few minutes to see if the system pressure rises.

Front 17

Before making a major repair, technicians must evacuate an appliance or component containing more than 200 pounds of R-410A to which of the following levels?

Back 17

10 inches of Hg vacuum

Front 18

When can appliances containing refrigerants be recovered to atmospheric pressure?

Back 18

Leaks in the appliance make recovery to the prescribed level unattainable.

Front 19

Which of the following repairs would always be considered “major” under EPA's regulations?

Back 19

Replacement of an evaporator coil.

Front 20

What is the state of the refrigerant leaving the receiver in a refrigeration system?

Back 20

High pressure liquid

Front 21

When recovery is first started, at what phase is the refrigerant removed to save recovery time?

Back 21

Liquid phase

Front 22

Where must you connect a hose in order to recover liquid refrigerant?

Back 22

The liquid line

Front 23

Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following?

Back 23

Oil

Front 24

After refrigerant liquid has been recovered from the appliance, any remaining vapor is;

Back 24

Removed by the recovery system.

Front 25

How can you speed up the removal of the refrigerant charge from a system?

Back 25

Cooling the recovery cylinder to lower its pressure.