Answers,2025.
The recovery process on an R-12 or
JJ JJ JJ JJ JJ JJ JJ
R-134 A/C system should continue until a stable vacuum is held by the system for:
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
(A) 1 minute
JJ JJ
(B) 2 minutes
JJ JJ JJ
(C) 4 minutes
JJ JJ JJ
(D) 5 minutes - CORRECT ANSWER✔✔(B) 2 minutes
JJ JJ JJ JJ JJ JJ JJ
A recycled refrigerant container has been checked and found to be above the given pressure limit for
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
the ambient temperature.
JJ JJ JJ
Technician A says that the refrigerant container should be placed in a cooler storage area before use.
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
Technician B says that the vapor in the container should be slowly vented into a refrigerant handling
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
unit.
JJ
, Who is right? JJ JJ JJ
(A) A only JJ JJ JJ
(B) B only JJ JJ JJ
(C) Both A and B
JJ JJ JJ JJ JJ
(D) Neither A nor B - CORRECT ANSWER✔✔(B) B only
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
why is A wrong? JJ JJ JJ
The ozone layer filters out most of the sun's harmful:
JJ JJ JJ JJ JJ JJ JJ JJ JJ
(A) Infrared radiation.
JJ JJ
(B) Ultraviolet radiation.
JJ JJ
(C) Gamma radiation.
JJ JJ
JJ (D) Alpha radiation. - CORRECT ANSWER✔✔(B) Ultraviolet radiation.
JJ JJ JJ JJ JJ JJ JJ
The reduction of ozone in the stratosphere could cause:
JJ JJ JJ JJ JJ JJ JJ JJ
(A) an increase in skin cancer and eye cataracts
JJ JJ JJ JJ JJ JJ JJ JJ
(B) an increase in plant life growth.
JJ JJ JJ JJ JJ JJ JJ
(C) an increase in the earth's polar ice.
JJ JJ JJ JJ JJ JJ JJ
D) an increase in marine life growth. - CORRECT ANSWER✔✔(A) an increase in skin cancer and eye
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
cataracts
JJ
Technician A says that sunlight striking CFC molecules can cause chlorine to be released.
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
Technician B says that chlorine atoms react with ozone to produce chlorine monoxide.
JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ JJ
Who is right? JJ JJ