Pipes and Tubing Test Questions and Answers Fully Solved Latest 2025
what is a pre-manufatured short length of pipe with male threads? - Answers nipple
what type of seal is used between two stationary or non moving parts? - Answers static seal
at what pressure does acetylene become unstable? - Answers 15 psi
pvc is incompatible with _____________ - Answers high temperatures
what medium would be in a piping system identified by yellow and black stripes? - Answers lube oil
what fitting is used to permit piping systems to be taken down for repair or alteration? - Answers union
when dealing with pipe, what does NPT stand for? - Answers national pipe thread
what material is used to prevent oxidation while soldering or brazing? - Answers flux
what is the term used to describe the process by which heat flows from molecules in metal? - Answers
conduction
what two ways can tubing be cut? - Answers hack saw, tubing cutter
copper tubing is primarily used in what applications? - Answers low pressure applications
why is threading plastic pipe not recommended? - Answers threads weaken pipe material.
what fitting is used to change the direction of piping? - Answers elbows
pipes that are over 12 inches in diameter are measured by its _________________ - Answers actual
outside diameter
plastic pipe may be cut with what tools? - Answers fine toothed hack saw, band saw, plastic pipe cutter
do NOT use teflon anti-seize on what types of systems? - Answers petroleum + natural gas systems
what is the essential difference between pipe and tubing? - Answers thickness and flexibility
when discussing tubing, what two types of fitting are used as a means of making a connection when
periodic disconnection is required? - Answers flared and compression
what color cyclinder is oxygen stored in? - Answers green
oxygen and acetylene should be stored in separate locations, how many feet apart? - Answers 20 feet
how can you tell the difference between oxygen and acetylene hoses - Answers oxygen= green, right
hand threaded
acetylene= red, left hand threaded
, what fitting is used to join two sections of pipe of different size? - Answers reducer coupling
what size pipe cutter is used on a 1" pipe? - Answers No. 2
what is the most common way to join plastic pipe in the coast guard? - Answers solvent welding
what type of seal is used between two parts where one or both parts move? - Answers dynamic seal
how often should spray sheilds be inspected to insure they are secured and not damaged? - Answers
quarterly
o-rings are usually molded from what type of compound/s? - Answers rubber compounds or molded
plastics
what gas can spontaneously ignite in the presence of petroleum-based products, e.g, oil and grease? -
Answers oxygen
oxygen and acetylene valves should only be opened how much? - Answers oxygen all the way, acetylene
half turn (1/2)
oxygen regulator fittings have what type of threads? - Answers right handed thread
what shade of lens should be used for medium gas cutting and welding? - Answers shade 6 or 7
an oxidizing flame produces what temperature flame? - Answers 5,900 degrees F
what type of pipe fitting is used to connect pipe of one size to a fitting of a larger size? - Answers reducer
bushing
when replacing pipe, when possible you should use the same type of material from the _________ -
Answers OEM (original equipment manufacturer)
what color is acetylene? - Answers colorless
regulators with two gauges indicate what two pressures? - Answers cylinder and delivery pressure
what safety device is used to prevent flashbacks? - Answers flashback arrestor
when using oxyacetylene a flame is used for what? - Answers welding, brazing and cutting
what type of flux both cleans and prevents oxidation? - Answers acid based
what is placed between two flanges on a flanged joint? - Answers gasket
when pipes are too small for stenciling, what may be used to label them? - Answers wire labeling plates
can tubing be threaded? - Answers no
what is a pre-manufatured short length of pipe with male threads? - Answers nipple
what type of seal is used between two stationary or non moving parts? - Answers static seal
at what pressure does acetylene become unstable? - Answers 15 psi
pvc is incompatible with _____________ - Answers high temperatures
what medium would be in a piping system identified by yellow and black stripes? - Answers lube oil
what fitting is used to permit piping systems to be taken down for repair or alteration? - Answers union
when dealing with pipe, what does NPT stand for? - Answers national pipe thread
what material is used to prevent oxidation while soldering or brazing? - Answers flux
what is the term used to describe the process by which heat flows from molecules in metal? - Answers
conduction
what two ways can tubing be cut? - Answers hack saw, tubing cutter
copper tubing is primarily used in what applications? - Answers low pressure applications
why is threading plastic pipe not recommended? - Answers threads weaken pipe material.
what fitting is used to change the direction of piping? - Answers elbows
pipes that are over 12 inches in diameter are measured by its _________________ - Answers actual
outside diameter
plastic pipe may be cut with what tools? - Answers fine toothed hack saw, band saw, plastic pipe cutter
do NOT use teflon anti-seize on what types of systems? - Answers petroleum + natural gas systems
what is the essential difference between pipe and tubing? - Answers thickness and flexibility
when discussing tubing, what two types of fitting are used as a means of making a connection when
periodic disconnection is required? - Answers flared and compression
what color cyclinder is oxygen stored in? - Answers green
oxygen and acetylene should be stored in separate locations, how many feet apart? - Answers 20 feet
how can you tell the difference between oxygen and acetylene hoses - Answers oxygen= green, right
hand threaded
acetylene= red, left hand threaded
, what fitting is used to join two sections of pipe of different size? - Answers reducer coupling
what size pipe cutter is used on a 1" pipe? - Answers No. 2
what is the most common way to join plastic pipe in the coast guard? - Answers solvent welding
what type of seal is used between two parts where one or both parts move? - Answers dynamic seal
how often should spray sheilds be inspected to insure they are secured and not damaged? - Answers
quarterly
o-rings are usually molded from what type of compound/s? - Answers rubber compounds or molded
plastics
what gas can spontaneously ignite in the presence of petroleum-based products, e.g, oil and grease? -
Answers oxygen
oxygen and acetylene valves should only be opened how much? - Answers oxygen all the way, acetylene
half turn (1/2)
oxygen regulator fittings have what type of threads? - Answers right handed thread
what shade of lens should be used for medium gas cutting and welding? - Answers shade 6 or 7
an oxidizing flame produces what temperature flame? - Answers 5,900 degrees F
what type of pipe fitting is used to connect pipe of one size to a fitting of a larger size? - Answers reducer
bushing
when replacing pipe, when possible you should use the same type of material from the _________ -
Answers OEM (original equipment manufacturer)
what color is acetylene? - Answers colorless
regulators with two gauges indicate what two pressures? - Answers cylinder and delivery pressure
what safety device is used to prevent flashbacks? - Answers flashback arrestor
when using oxyacetylene a flame is used for what? - Answers welding, brazing and cutting
what type of flux both cleans and prevents oxidation? - Answers acid based
what is placed between two flanges on a flanged joint? - Answers gasket
when pipes are too small for stenciling, what may be used to label them? - Answers wire labeling plates
can tubing be threaded? - Answers no
