CM 2112 Industrial Piping Final Exam
and All Correct Answers 2025-2026
Updated.
true - Answer The materials used in piping construction are chosen to withstand the
temperature, pressure, and other properties of the fluids being conveyed.
false - Answer Nominal pipe sizes are usually the same as their actual inside or outside
diameters.
true - Answer The pipe wall thickness increases as the schedule number increases.
true - Answer A 3" schedule 40 pipe will have a different wall thickness than a 4" schedule 40
pipe.
true - Answer Piping with threaded joints is generally much less expensive and easier to
install than piping with welded joints.
true - Answer Small pipes are commonly joined by the use of tapered pipe threads.
true - Answer Screwed piping is used in sizes up to 2" for handling nonhazardous materials.
true - Answer Socket-welded fittings are usually used in 2" size and smaller; butt-welding is
used in all sizes, but particularly in 2" size and larger.
true - Answer Raised face flanges use a gasket that fits inside the bolts and ring joint flanges
use only a metal ring for gasketing.
true - Answer Flanges are made in various thicknesses and for various bolt sizes according to
the pressure and temperature of the service.
true - Answer Flammable liquid containers can build up static charges as the material is
pumped in.
, true - Answer A paddle blind is inserted between two flanges, with a gasket on each side,
while a figure-eight blind is designed to be installed inside the piping.
true - Answer The chemical industry has two methods to prevent fire hazards from static
electric sparks - bonding and grounding.
true - Answer Underground water pipes can function as a grounding device.
true - Answer Two methods of cathodic protection are using sacrificial anodes and using
impressed current anodes.
true - Answer Most piping used in process units is carbon steel, because it is fairly
economical and has a wide temperature range.
true - Answer Some low alloys (carbon-, moly-, and chrome alloys) are used in high
temperature service such as furnace tubes
true - Answer Piping of the same size (e.g., all 4" pipe) has a constant outside diameter.
false - Answer A double-block-and-bleed system is considered a complete shutoff.
false - Answer Process equipment is designed exactly for normal operating pressure.
true - Answer Blocking in equipment unprotected by relief valves can exceed design
conditions and cause failure
false - Answer The strength of metals increases as temperature increases.
true - Answer As operating temperature increases above 650°F, the strength of low-carbon
steel decreases, becoming significant between 950°F to 1000°F.
true - Answer Besides affecting strength, temperature has a profound effect on corrosion
rates.
and All Correct Answers 2025-2026
Updated.
true - Answer The materials used in piping construction are chosen to withstand the
temperature, pressure, and other properties of the fluids being conveyed.
false - Answer Nominal pipe sizes are usually the same as their actual inside or outside
diameters.
true - Answer The pipe wall thickness increases as the schedule number increases.
true - Answer A 3" schedule 40 pipe will have a different wall thickness than a 4" schedule 40
pipe.
true - Answer Piping with threaded joints is generally much less expensive and easier to
install than piping with welded joints.
true - Answer Small pipes are commonly joined by the use of tapered pipe threads.
true - Answer Screwed piping is used in sizes up to 2" for handling nonhazardous materials.
true - Answer Socket-welded fittings are usually used in 2" size and smaller; butt-welding is
used in all sizes, but particularly in 2" size and larger.
true - Answer Raised face flanges use a gasket that fits inside the bolts and ring joint flanges
use only a metal ring for gasketing.
true - Answer Flanges are made in various thicknesses and for various bolt sizes according to
the pressure and temperature of the service.
true - Answer Flammable liquid containers can build up static charges as the material is
pumped in.
, true - Answer A paddle blind is inserted between two flanges, with a gasket on each side,
while a figure-eight blind is designed to be installed inside the piping.
true - Answer The chemical industry has two methods to prevent fire hazards from static
electric sparks - bonding and grounding.
true - Answer Underground water pipes can function as a grounding device.
true - Answer Two methods of cathodic protection are using sacrificial anodes and using
impressed current anodes.
true - Answer Most piping used in process units is carbon steel, because it is fairly
economical and has a wide temperature range.
true - Answer Some low alloys (carbon-, moly-, and chrome alloys) are used in high
temperature service such as furnace tubes
true - Answer Piping of the same size (e.g., all 4" pipe) has a constant outside diameter.
false - Answer A double-block-and-bleed system is considered a complete shutoff.
false - Answer Process equipment is designed exactly for normal operating pressure.
true - Answer Blocking in equipment unprotected by relief valves can exceed design
conditions and cause failure
false - Answer The strength of metals increases as temperature increases.
true - Answer As operating temperature increases above 650°F, the strength of low-carbon
steel decreases, becoming significant between 950°F to 1000°F.
true - Answer Besides affecting strength, temperature has a profound effect on corrosion
rates.
