Q1. Pipe wall thicknesses are designated as pipe schedules in what sizes of pipe?
(a) Up to 18 in
(b) Up to 24 in
(c) Up to 36 in
(d) Up to 48 in
Q2. What is an alternative system for defining pipe wall thicknesses?
(a) Standard, extra strong and double extra strong
(b) Normal, strong and extra strong
(c) Standard, strong and extra strong
(d) XX, XXX and XXXX
Q3. For NPS 12 pipe, which dimension stays the same, regardless of the wall schedule thickness?
(a) The inside diameter (ID)
(b) The outside diameter (OD)
(c) The mean wall diameter
(d) None of these; they all vary with schedule thickness
Q4. Which ASME standard covers the pressure/temperature ratings of valve bodies?
(a) ASME B31.3
(b) ASME B16.5
(c) ASME B16.34
(d) ASME VIII
Q5. What is the normal acceptable thickness under-tolerance on wall thickness for A106 plain carbon steel pipe up to NPS 48?
(a) 0.125 in
(b) 10 % of nominal wall thickness
(c) 12.5 % of nominal wall thickness
(d) 15 % of nominal wall thickness
