CFC Refrigerant Identification & Testing 2

Question 1

What is the ASHRAE numerical designation for the refrigerant formerly known by the trade name Freon-12?

Accepted Answer

R-12

Answer

R-11

Answer

R-22

Answer

R-500

Question 2

What is the standard AHRI cylinder color for R-134a refrigerant?

Accepted Answer

Sky blue

Answer

Light green

Answer

White

Answer

Rose/pink

Question 3

When using a refrigerant identifier and receiving a 'FAIL - mixed refrigerant' reading, what does this indicate?

Accepted Answer

The cylinder contains two or more different refrigerants blended together

Answer

The identifier requires recalibration

Answer

The refrigerant is too pure to identify correctly

Answer

The refrigerant is a listed zeotropic blend

Question 4

What distinguishes R-410A from R-407C in terms of phase-change behavior during system testing?

Accepted Answer

R-410A has minimal temperature glide while R-407C has a significant glide of 4-7°F

Answer

They have identical pressure-temperature relationships

Answer

R-407C operates at higher pressures than R-410A

Answer

R-410A has a larger temperature glide than R-407C

Question 5

What is the moisture content limit for reclaimed R-22 per AHRI Standard 700?

Accepted Answer

10 ppm by weight

Answer

50 ppm by weight

Answer

100 ppm by weight

Answer

25 ppm by weight

Question 6

What is the standard cylinder color assigned to R-12 refrigerant?

Accepted Answer

White

Answer

Light green

Answer

Orange

Answer

Sky blue

Question 7

What field test can be used to check for the presence of non-condensable gases in a refrigerant cylinder?

Accepted Answer

Compare cylinder pressure to the P-T chart value for the measured cylinder temperature

Answer

Weigh the cylinder and compare to rated capacity on the label

Answer

Shake the cylinder and listen for liquid movement inside

Answer

Check the cylinder DOT label for listed non-condensable content