RED SEAL IPT EXAM QUESTIONS WITH
DETAILED ANSWERS 2026
Which of the methods below is not used for steel pipe manufacturing? -
ANSWERSType L, lap welded
Pipe is classed as either seam welded or seamless manufactured. True or False? Pg
2,4,6 - ANSWERSTrue
The standards for A-53 and A-106 are established by who? - ANSWERSASTM
A- 53 is a commonly used pipe. All A-53 pipe is classified as A-53, Grade B. True or
False? Pg 12 - ANSWERSFalse
What are the three general weight or wall thickness classifications for steel pipe? -
ANSWERSStandard, Extra Strong or Extra Heavy, Double Extra Strong or Double Extra
Heavy
For any steel pipe size: The ________ is the constant and the ________ varies. -
ANSWERSThe O.D. is constant and the I.D. varies
The pipe abbreviation NPS means: - ANSWERSNominal Pipe Size
Steel pipe in sizes up to 12" (300mm) are larger in outside diameter than their normal
size, and pipe in sizes over 12" have an outside diameter corresponding to the nominal
size. True or False? Pg 13,18 - ANSWERSTrue
Wall thickness for standard weight pipe and schedule 40 are identical through the entire
size range. True or False? Pg 14 - ANSWERSFalse
What is the actual outside diameter of an 8" (200mm) steel pipe? - ANSWERS8.625
inches (219mm)
List 4 basic pipe finishes which are commercially available - ANSWERSThreaded,
Plain, Beveled and Grooved
Threaded couplings supplied on pipe sizes up to 2" (50mm) are ___________ threaded;
while all extra strong and double extra strong supplied couplings are __________
threaded. - ANSWERSParallel, Taper
All steel pipe manufactured in North America under the ASTM, API or CSA standard will
have identical specification markings. True or False? Pg 48 -50 - ANSWERSFalse
,The commonly used steel pipe, referred to as black iron pipe, has a lacquer finish to
prevent corrosion. True or False? Pg 51 - ANSWERSTrue
Wrought iron pipe is another name for wrought steel pipe. True or False? Pg 53 -
ANSWERSFalse
State the two main advantages of stainless steel pipe over carbon steel pipe -
ANSWERSImproved corrosion resistance, higher temperature resistance
Copper and red brass pipe is actually tubing. Therefor the outside diameter is not the
same as steel pipe for sizes up to 12 inch (300mm). True or False? Pg 59 -
ANSWERSFalse
Cast iron pressure pipe was originally designed for underground service. In modern-day
construction projects for gas, water, or other liquids it is: - ANSWERSBeing replaced by
plastic pipe
Cast iron steel pipe is still commonly used in many commercial buildings because: -
ANSWERSSome building code regulations prohibit plastic pipe
What is a typical use of silicon iron pipe? - ANSWERSLaboratory drainage and waste
What are two basic categories of plastic pipe? - ANSWERSThermoplastic and
thermoset
ABS and PVC are types of thermoset plastic pipe. True or False? Pg 69 -
ANSWERSFalse
Plastic metal composition pipe uses a ___________ Core laminated between interior
and exterior layers of _____________. - ANSWERSMetal, thermoplastic
Plastic metal composition pipe results in a pipe that is as ________________ as a
plastic pipe, and has the _______________ of a steel pipe. - ANSWERSDurable,
strength
ABS pipe, rated at 230 psi (1590 kPa), is ____________ in color. - ANSWERSBlue grey
PVC pipe can be joined by the following methods: - ANSWERSCementing, O rings,
threading, grooved joints, and flanging
PVDF pipe has a maximum operating temperature of 280°F (138°C) and is safely used
for: - ANSWERSWet and dry chloride, bromine, pure water and halogens
When solvent cementing plastic pipe, the joining surfaces are softened by: -
ANSWERSPrimer, cement, primer and cement combination
, What schedule of pipe is recommended for threading? - ANSWERSSchedule 80
What is used to keep a plastic pipe round while threading? - ANSWERSAluminum or
wooden plugs
Plastic pipe flanges are manufactured to the same dimensions as: - ANSWERSANSI -
150 lb steel flanges
An 8 inch (200mm) tube will have an outside diameter equal to an 8 inch (200mm) pipe.
True or False? Pg 86 - ANSWERSFalse
What are the three main categories of tubing? - ANSWERSStructural, mechanical and
pressure
How is structural tube sized? - ANSWERSOutside measurement and wall thickness
Mechanical tube is designed to carry fluids under pressure. True or false? Pg 86 -
ANSWERSFalse
Coiled aluminum tubing is generally supplied in thicknesses up to 3/8" (9.5mm). True or
false? Pg 89 - ANSWERSFalse
Tube types K, L and M are sized by the actual outside diameter measurement. True or
false? Pg 91 - ANSWERSFalse
What is the easy way to determine the O.D. of a type K, L or M tube? - ANSWERSAdd
1/8" (3.175mm) to the nominal size
With reference to copper tube what do the following abbreviated letters stand for: ACR,
GP DWV - ANSWERSAir conditioning and refrigeration, General purpose, drainage
waste and vent
Tube types K, L and M are only available in coils of "soft" copper. True or false? Pg 92 -
ANSWERSFalse
State the color code for each of the copper types: K, L, M, DWV - ANSWERSK-Green,
L-Blue, M-Red, DWV-yellow
What are the four major groupings for carbon steel and/or stainless steel tube? -
ANSWERSBoiler and superheater tube, heat exchanger and condenser tube, still tube,
general-purpose tube
What is the purpose of still tubing? - ANSWERSCan withstand temperatures higher
externally than the internal fluid
DETAILED ANSWERS 2026
Which of the methods below is not used for steel pipe manufacturing? -
ANSWERSType L, lap welded
Pipe is classed as either seam welded or seamless manufactured. True or False? Pg
2,4,6 - ANSWERSTrue
The standards for A-53 and A-106 are established by who? - ANSWERSASTM
A- 53 is a commonly used pipe. All A-53 pipe is classified as A-53, Grade B. True or
False? Pg 12 - ANSWERSFalse
What are the three general weight or wall thickness classifications for steel pipe? -
ANSWERSStandard, Extra Strong or Extra Heavy, Double Extra Strong or Double Extra
Heavy
For any steel pipe size: The ________ is the constant and the ________ varies. -
ANSWERSThe O.D. is constant and the I.D. varies
The pipe abbreviation NPS means: - ANSWERSNominal Pipe Size
Steel pipe in sizes up to 12" (300mm) are larger in outside diameter than their normal
size, and pipe in sizes over 12" have an outside diameter corresponding to the nominal
size. True or False? Pg 13,18 - ANSWERSTrue
Wall thickness for standard weight pipe and schedule 40 are identical through the entire
size range. True or False? Pg 14 - ANSWERSFalse
What is the actual outside diameter of an 8" (200mm) steel pipe? - ANSWERS8.625
inches (219mm)
List 4 basic pipe finishes which are commercially available - ANSWERSThreaded,
Plain, Beveled and Grooved
Threaded couplings supplied on pipe sizes up to 2" (50mm) are ___________ threaded;
while all extra strong and double extra strong supplied couplings are __________
threaded. - ANSWERSParallel, Taper
All steel pipe manufactured in North America under the ASTM, API or CSA standard will
have identical specification markings. True or False? Pg 48 -50 - ANSWERSFalse
,The commonly used steel pipe, referred to as black iron pipe, has a lacquer finish to
prevent corrosion. True or False? Pg 51 - ANSWERSTrue
Wrought iron pipe is another name for wrought steel pipe. True or False? Pg 53 -
ANSWERSFalse
State the two main advantages of stainless steel pipe over carbon steel pipe -
ANSWERSImproved corrosion resistance, higher temperature resistance
Copper and red brass pipe is actually tubing. Therefor the outside diameter is not the
same as steel pipe for sizes up to 12 inch (300mm). True or False? Pg 59 -
ANSWERSFalse
Cast iron pressure pipe was originally designed for underground service. In modern-day
construction projects for gas, water, or other liquids it is: - ANSWERSBeing replaced by
plastic pipe
Cast iron steel pipe is still commonly used in many commercial buildings because: -
ANSWERSSome building code regulations prohibit plastic pipe
What is a typical use of silicon iron pipe? - ANSWERSLaboratory drainage and waste
What are two basic categories of plastic pipe? - ANSWERSThermoplastic and
thermoset
ABS and PVC are types of thermoset plastic pipe. True or False? Pg 69 -
ANSWERSFalse
Plastic metal composition pipe uses a ___________ Core laminated between interior
and exterior layers of _____________. - ANSWERSMetal, thermoplastic
Plastic metal composition pipe results in a pipe that is as ________________ as a
plastic pipe, and has the _______________ of a steel pipe. - ANSWERSDurable,
strength
ABS pipe, rated at 230 psi (1590 kPa), is ____________ in color. - ANSWERSBlue grey
PVC pipe can be joined by the following methods: - ANSWERSCementing, O rings,
threading, grooved joints, and flanging
PVDF pipe has a maximum operating temperature of 280°F (138°C) and is safely used
for: - ANSWERSWet and dry chloride, bromine, pure water and halogens
When solvent cementing plastic pipe, the joining surfaces are softened by: -
ANSWERSPrimer, cement, primer and cement combination
, What schedule of pipe is recommended for threading? - ANSWERSSchedule 80
What is used to keep a plastic pipe round while threading? - ANSWERSAluminum or
wooden plugs
Plastic pipe flanges are manufactured to the same dimensions as: - ANSWERSANSI -
150 lb steel flanges
An 8 inch (200mm) tube will have an outside diameter equal to an 8 inch (200mm) pipe.
True or False? Pg 86 - ANSWERSFalse
What are the three main categories of tubing? - ANSWERSStructural, mechanical and
pressure
How is structural tube sized? - ANSWERSOutside measurement and wall thickness
Mechanical tube is designed to carry fluids under pressure. True or false? Pg 86 -
ANSWERSFalse
Coiled aluminum tubing is generally supplied in thicknesses up to 3/8" (9.5mm). True or
false? Pg 89 - ANSWERSFalse
Tube types K, L and M are sized by the actual outside diameter measurement. True or
false? Pg 91 - ANSWERSFalse
What is the easy way to determine the O.D. of a type K, L or M tube? - ANSWERSAdd
1/8" (3.175mm) to the nominal size
With reference to copper tube what do the following abbreviated letters stand for: ACR,
GP DWV - ANSWERSAir conditioning and refrigeration, General purpose, drainage
waste and vent
Tube types K, L and M are only available in coils of "soft" copper. True or false? Pg 92 -
ANSWERSFalse
State the color code for each of the copper types: K, L, M, DWV - ANSWERSK-Green,
L-Blue, M-Red, DWV-yellow
What are the four major groupings for carbon steel and/or stainless steel tube? -
ANSWERSBoiler and superheater tube, heat exchanger and condenser tube, still tube,
general-purpose tube
What is the purpose of still tubing? - ANSWERSCan withstand temperatures higher
externally than the internal fluid
