Which of the following safety features may be incorporated into a reducing valve?
I. American standard safety system threads
II. pin index safety system connections
III. diameter index safety system threads
IV. a pressure relief for each stage of pressure reduction
A) I
B) I and II
C) I, II, and III
D) I, II, III and IV
Question 2
Which of the following are safety features of cylinder valves?
I. American Standard Safety System threading
II. pin index safety system connections
III. fusible plugs
IV. frangible disks
A) I
B) I and II
C) I, II, and III
D) I, II, III, and IV