Why are a hammer and chisel used on a DOT 39 cylinder?
A) To break open the cylinder
B) To lessen refrigerant pressure
C) To remove the nozzle
D) To open the rupture disk when disposing an empty cylinder
[Ques. 2] What PPE should technicians always wear when handling refrigerant?
A) Gloves, safety glasses, and a self-contained breathing apparatus
B) Gloves
C) Gloves and safety glasses
D) Safety glasses
[Ques. 3] Most type I systems are evacuated and charged at the factory through:
A) A process tube or process stub. B) The suction service valve.
C) The king valve. D) Both the suction service and king valves.
[Ques. 4] After servicing a system using a bolt-on piercing valve, the technician should:
A) Simply remove the gauges because most bolt-on valves are self-sealing.
B) Close the bolt-on valve, remove the gauges, and put on the valve cap.
C) Remove the bolt-on valve and quickly braze up the hole.
D) Recover the refrigerant, remove the bolt-on valve, and replace it with a permanent valve.
[Ques. 5] A saddle piercing valve:
A) Is used to gain access to a sealed system.
B) Is used to pierce the saddle on a manual service valve whose stem has been rounded off so the technician can still get a reading.
C) Is the most common type of refrigeration service valve used on commercial refrigeration systems.
D) Should be installed on all systems at the start of a service call.
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