When connecting a recovery system for push-pull liquid recovery, the outlet of the recovery unit is connected to:
A) The discharge service valve on the system.
B) The vapor valve on the refrigerant recovery cylinder.
C) The king valve on the system.
D) The liquid valve on the refrigerant recovery cylinder.
[Ques. 2] Alternating current frequency is measured in:
A) Bandwidth (BW). B) Power Width Modulations (PWM).
C) Gigabytes (GB). D) Hertz (Hz).
[Ques. 3] Select the techniques that can be used to speed up refrigerant recovery. (You may select more than one.)
A) Use large-diameter hoses. B) Use long hoses.
C) Recover from both sides of the system at once. D) Heat the refrigerant system.
E) Heat the recovery cylinder. F) Cool the recovery cylinder.
[Ques. 4] What is the maximum safe fill weight of a recovery cylinder with a tare weight of 30 lb, a water capacity of 40 lb, holding a refrigerant with a specific gravity of 1.2?
A) (30 lb + 40 lb) 0.8 = 56 lb (rounded) B) 30 lb + 40 lb = 70 lb (rounded)
C) 30 lb + (40 lb 0.8 1.2 ) = 68 lb (rounded) D) (30 lb + 40 lb) 1.2 = 84 lb (rounded)
[Ques. 5] Good electrical insulators include:
A) Ceramic, rubber, and plastic. B) Gold, silver, and copper.
C) Copper, aluminum, and steel. D) Steel, iron, and aluminum.
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