API 570 STUDY SET (INCLUDES
QUESTIONS FROM 574, 577,
SECTION IX, B31.3, 16.5, ASME V,
578, AND 571. WITH CORRECT
ANSWERS 2025
API Recommended Practice 574, Inspection of Piping, Tubing Valves, and
Fittings, does not cover ( Correct answers ) control valves
The refining industry generally uses what type piping for severe
service? ( Correct answers ) Seamless
Piping made by rolling plates to size and welding the seams is larger
than
inches outside diameter. ( Correct answers ) 16
Steel and alloy piping are manufactured to standard dimensions in nominal
pipe sizes up to inches. ( Correct answers ) 48
Steel and alloy piping are also manufactured to standard thicknesses
designated as schedules in nominal
pipe sizes up to inches. ( Correct answers ) 36
The actual thickness of wrought piping may vary from its nominal
thickness by a manufacturing under
tolerance of as much as percent. ( Correct answers ) 12.5
Cast piping has thickness tolerance of + inch and - inch.
( Correct answers ) 1/16, 0
For all nominal pipe sizes of inches and smaller, the size refers to the
nominal inside diameter. ( Correct answers ) 12
Under tolerance of welded pipe often used in refinery service is inch.
( Correct answers ) 0.010
For what service is cast iron piping normally used. ( Correct answers )
Nonhazardous service, such as water.
Tubing is generally seamlessly drawn, but it may be welded. Its stated size
is its actual: ( Correct answers ) outside diameter
There are many type valves. Which is the incorrect valve type listed below?
GRADED SUCCE
A+ SS
,a. style valve
b. gate valve
c. check valve
d. globe valve ( Correct answers ) a. style valve
What type valve is normally used in a fully open or fully closed
position? ( Correct answers ) gate
What type gate valves have body and port openings that are smaller than
the valves' end opening. ( Correct answers ) Reduced-port gate valves
What type of gate valve should not be used as block valves associated
with pressure relief devices? ( Correct answers ) Reduced-port gate valves
What is a globe valve used for? ( Correct answers ) It is commonly used
to regulate fluid flow.
A plug valve consists: ( Correct answers ) of a tapered or cylindrical
truncated cone with a slot that is fitted into a correspondingly shaped
seat.
What type of valve depends upon a spherical type gate has a hole in it and
is rotated to open or close it? ( Correct answers ) ball valve
What are check valves normally used for? ( Correct answers ) They
are used to automatically prevent back flow.
What are slide valves generally used for? ( Correct answers ) They are
generally used in erosive or high-temperature service.
What type of joint listed below would you NOT use in a 300 psi pipe system?
e. lap-joint flanged
f. welded
g. bell-and-spigot
h. weld-neck flanged ( Correct answers ) c. bell-and-spigot
What type of pipe joint is generally limited to piping in non-critical
service and has a nominal size of 2 inches
or smaller. ( Correct answers ) threaded joint
Socket-welded joints are usually used in nominal pipe sizes of or
smaller. ( Correct answers ) 2"
Which of the joints listed is the most common found in the petroleum
industry? ( Correct answers ) butt-welded joints
GRADED SUCCE
A+ SS
,The primary purpose of piping inspection is to: ( Correct answers ) ensure
plant safety and reliability; also achieve desired quality assurance.
Adequate inspection is a prerequisite for maintaining piping: ( Correct
answers ) in a safe, operable condition.
OSHA 1910.119 mandates that: ( Correct answers ) piping be inspected to
a code or standard such as API 570.
Regulatory requirements usually cover only those conditions that
affect: ( Correct answers ) safety.
The single most frequent reason for replacing piping is: ( Correct
answers ) thinning due to corrosion.
On piping that is operating, the key to effective monitoring of piping
corrosion is identifying and
establishing . ( Correct answers ) T.M.L.'s
You are asked to recommend a method for determining the thickness
of a pipe that has
1.5" of insulation,
with a vapor barrier, and aluminum jacketing on it. What is one of the best
ways to get the wall thickness
without stripping the jacketing and insulation? ( Correct answers ) RT
Leaks in piping systems are most easily detected: ( Correct answers )
while the equipment is operating and should be looked for
continuously.
Which one of the following is not a factor for consideration when
establishing corrosion monitoring
programs? ( Correct answers ) transducer diameter
Three problems can occur when tightening bolts to correct leaking flanges
in-service.
Which of the
below is not one of these problems?
a. bolt interactions
b. yielding due to overload
c. flange deflection
d. none of the above ( Correct answers ) d. none of the above
A greater loss in metal thickness will usually be observed near a restriction
or change in direction in a pipe
line. What usually causes this? ( Correct answers ) The effects of
turbulence or velocity.
GRADED SUCCE
A+ SS
, What type of problem would you expect to find in catalyst, flue-gas, and
slurry piping on a Fluid Catalytic
Cracking Unit. ( Correct answers ) erosion
Stainless steel such as type 304 18 Chr.-8 Ni in the presence of temperature
above 100 degrees F. may
crack because of the presence of: ( Correct answers ) chlorides
A 2" diameter line is injecting a product into an eight inch diameter pipe.
What type of deterioration would
you expect to take place? ( Correct answers ) accelerated corrosion or
erosion.
An inspector is checking a piping system that has had problems with
isolated corrosion at or near the welds
of piping shoes. Without knowing what product is in the line, what would
be the best answer below for the
problem? ( Correct answers ) The shoes are acting as cooling fins and
causing localized temperature differences.
What type of problem would you expect in piping containing Amine?
( Correct answers ) stress corrosion cracking.
What area do you consider to be of most concern when inspecting a piping
system? ( Correct answers ) At and/or downstream of a chemical injection
point.
Leaks in utility piping (water, steam, etc.) are: ( Correct answers ) seldom
hazardous but they do result in losses.
Where do many (maybe the majority) of leaks occur in pipelines? ( Correct
answers ) flanges or packing glands.
The prompt repair of will often prevent serious corrosion or
erosion of gasket surfaces or
packing glands. ( Correct answers ) leaks
The deformation of a vessel wall in the vicinity of a pipe attachment;
expansion joints that are not performing
properly; a pipe dislodged from its support; etc. are evidence of: ( Correct
answers )
misalignment
Spring hanger loadings should be checked under: ( Correct answers )
both cold and hot conditions.
An inspector finds concrete fireproofing around a structural steel column
with openings (cracks). The
GRADED SUCCE
A+ SS
QUESTIONS FROM 574, 577,
SECTION IX, B31.3, 16.5, ASME V,
578, AND 571. WITH CORRECT
ANSWERS 2025
API Recommended Practice 574, Inspection of Piping, Tubing Valves, and
Fittings, does not cover ( Correct answers ) control valves
The refining industry generally uses what type piping for severe
service? ( Correct answers ) Seamless
Piping made by rolling plates to size and welding the seams is larger
than
inches outside diameter. ( Correct answers ) 16
Steel and alloy piping are manufactured to standard dimensions in nominal
pipe sizes up to inches. ( Correct answers ) 48
Steel and alloy piping are also manufactured to standard thicknesses
designated as schedules in nominal
pipe sizes up to inches. ( Correct answers ) 36
The actual thickness of wrought piping may vary from its nominal
thickness by a manufacturing under
tolerance of as much as percent. ( Correct answers ) 12.5
Cast piping has thickness tolerance of + inch and - inch.
( Correct answers ) 1/16, 0
For all nominal pipe sizes of inches and smaller, the size refers to the
nominal inside diameter. ( Correct answers ) 12
Under tolerance of welded pipe often used in refinery service is inch.
( Correct answers ) 0.010
For what service is cast iron piping normally used. ( Correct answers )
Nonhazardous service, such as water.
Tubing is generally seamlessly drawn, but it may be welded. Its stated size
is its actual: ( Correct answers ) outside diameter
There are many type valves. Which is the incorrect valve type listed below?
GRADED SUCCE
A+ SS
,a. style valve
b. gate valve
c. check valve
d. globe valve ( Correct answers ) a. style valve
What type valve is normally used in a fully open or fully closed
position? ( Correct answers ) gate
What type gate valves have body and port openings that are smaller than
the valves' end opening. ( Correct answers ) Reduced-port gate valves
What type of gate valve should not be used as block valves associated
with pressure relief devices? ( Correct answers ) Reduced-port gate valves
What is a globe valve used for? ( Correct answers ) It is commonly used
to regulate fluid flow.
A plug valve consists: ( Correct answers ) of a tapered or cylindrical
truncated cone with a slot that is fitted into a correspondingly shaped
seat.
What type of valve depends upon a spherical type gate has a hole in it and
is rotated to open or close it? ( Correct answers ) ball valve
What are check valves normally used for? ( Correct answers ) They
are used to automatically prevent back flow.
What are slide valves generally used for? ( Correct answers ) They are
generally used in erosive or high-temperature service.
What type of joint listed below would you NOT use in a 300 psi pipe system?
e. lap-joint flanged
f. welded
g. bell-and-spigot
h. weld-neck flanged ( Correct answers ) c. bell-and-spigot
What type of pipe joint is generally limited to piping in non-critical
service and has a nominal size of 2 inches
or smaller. ( Correct answers ) threaded joint
Socket-welded joints are usually used in nominal pipe sizes of or
smaller. ( Correct answers ) 2"
Which of the joints listed is the most common found in the petroleum
industry? ( Correct answers ) butt-welded joints
GRADED SUCCE
A+ SS
,The primary purpose of piping inspection is to: ( Correct answers ) ensure
plant safety and reliability; also achieve desired quality assurance.
Adequate inspection is a prerequisite for maintaining piping: ( Correct
answers ) in a safe, operable condition.
OSHA 1910.119 mandates that: ( Correct answers ) piping be inspected to
a code or standard such as API 570.
Regulatory requirements usually cover only those conditions that
affect: ( Correct answers ) safety.
The single most frequent reason for replacing piping is: ( Correct
answers ) thinning due to corrosion.
On piping that is operating, the key to effective monitoring of piping
corrosion is identifying and
establishing . ( Correct answers ) T.M.L.'s
You are asked to recommend a method for determining the thickness
of a pipe that has
1.5" of insulation,
with a vapor barrier, and aluminum jacketing on it. What is one of the best
ways to get the wall thickness
without stripping the jacketing and insulation? ( Correct answers ) RT
Leaks in piping systems are most easily detected: ( Correct answers )
while the equipment is operating and should be looked for
continuously.
Which one of the following is not a factor for consideration when
establishing corrosion monitoring
programs? ( Correct answers ) transducer diameter
Three problems can occur when tightening bolts to correct leaking flanges
in-service.
Which of the
below is not one of these problems?
a. bolt interactions
b. yielding due to overload
c. flange deflection
d. none of the above ( Correct answers ) d. none of the above
A greater loss in metal thickness will usually be observed near a restriction
or change in direction in a pipe
line. What usually causes this? ( Correct answers ) The effects of
turbulence or velocity.
GRADED SUCCE
A+ SS
, What type of problem would you expect to find in catalyst, flue-gas, and
slurry piping on a Fluid Catalytic
Cracking Unit. ( Correct answers ) erosion
Stainless steel such as type 304 18 Chr.-8 Ni in the presence of temperature
above 100 degrees F. may
crack because of the presence of: ( Correct answers ) chlorides
A 2" diameter line is injecting a product into an eight inch diameter pipe.
What type of deterioration would
you expect to take place? ( Correct answers ) accelerated corrosion or
erosion.
An inspector is checking a piping system that has had problems with
isolated corrosion at or near the welds
of piping shoes. Without knowing what product is in the line, what would
be the best answer below for the
problem? ( Correct answers ) The shoes are acting as cooling fins and
causing localized temperature differences.
What type of problem would you expect in piping containing Amine?
( Correct answers ) stress corrosion cracking.
What area do you consider to be of most concern when inspecting a piping
system? ( Correct answers ) At and/or downstream of a chemical injection
point.
Leaks in utility piping (water, steam, etc.) are: ( Correct answers ) seldom
hazardous but they do result in losses.
Where do many (maybe the majority) of leaks occur in pipelines? ( Correct
answers ) flanges or packing glands.
The prompt repair of will often prevent serious corrosion or
erosion of gasket surfaces or
packing glands. ( Correct answers ) leaks
The deformation of a vessel wall in the vicinity of a pipe attachment;
expansion joints that are not performing
properly; a pipe dislodged from its support; etc. are evidence of: ( Correct
answers )
misalignment
Spring hanger loadings should be checked under: ( Correct answers )
both cold and hot conditions.
An inspector finds concrete fireproofing around a structural steel column
with openings (cracks). The
GRADED SUCCE
A+ SS
