API 570 Study Set (Includes Questions from 574, 577, Section IX, B31.3, 16.5, ASME V, 578, and
571 Questions with Answers
API Recommended Practice 574, Inspection of Piping, Tubing Valves, and Fittings, does not cover -
correct answer scontrol valves
The refining industry generally uses what type piping for severe service? - correct answersSeamless
Piping made by rolling plates to size and welding the seams is larger than ______ inches outside
diameter. - correct answers16
Steel and alloy piping are manufactured to standard dimensions in nominal pipe sizes up to ______
inches. - correct answers48
Steel and alloy piping are also manufactured to standard thicknesses designated as schedules in nominal
pipe sizes up to _______ inches. - correct answers36
The actual thickness of wrought piping may vary from its nominal thickness by a manufacturing under
tolerance of as much as _________ percent. - correct answers12.5
Cast piping has thickness tolerance of + ______ inch and - _______ inch. - correct answers1/16, 0
For all nominal pipe sizes of ______ inches and smaller, the size refers to the nominal inside diameter. -
correct answers12
Under tolerance of welded pipe often used in refinery service is ________ inch. - correct answers0.010
For what service is cast iron piping normally used. - correct answersNonhazardous service, such as water.
Tubing is generally seamlessly drawn, but it may be welded. Its stated size is its actual: - correct
answersoutside diameter
,There are many type valves. Which is the incorrect valve type listed below?
a. style valve
b. gate valve
c. check valve
d. globe valve - correct answersa. style valve
What type valve is normally used in a fully open or fully closed position? - correct answersgate
What type gate valves have body and port openings that are smaller than the valves' end opening. -
correct answersReduced-port gate valves
What type of gate valve should not be used as block valves associated with pressure relief devices? -
correct answersReduced-port gate valves
What is a globe valve used for? - correct answersIt is commonly used to regulate fluid flow.
A plug valve consists: - correct answersof 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 answersball valve
What are check valves normally used for? - correct answersThey are used to automatically prevent back
flow.
What are slide valves generally used for? - correct answersThey 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?
a. lap-joint flanged
b. welded
,c. bell-and-spigot
d. weld-neck flanged - correct answersc. 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 answersthreaded joint
Socket-welded joints are usually used in nominal pipe sizes of _____ or smaller. - correct answers2"
Which of the joints listed is the most common found in the petroleum industry? - correct answersbutt-
welded joints
The primary purpose of piping inspection is to: - correct answersensure plant safety and reliability; also
achieve desired quality assurance.
Adequate inspection is a prerequisite for maintaining piping: - correct answersin a safe, operable
condition.
OSHA 1910.119 mandates that: - correct answerspiping be inspected to a code or standard such as API
570.
Regulatory requirements usually cover only those conditions that affect: - correct answerssafety.
The single most frequent reason for replacing piping is: - correct answersthinning due to corrosion.
On piping that is operating, the key to effective monitoring of piping corrosion is identifying and
establishing __________________. - correct answersT.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 answersRT
Leaks in piping systems are most easily detected: - correct answerswhile 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 answerstransducer 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 answersd. 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 answersThe effects of turbulence or velocity.
What type of problem would you expect to find in catalyst, flue-gas, and slurry piping on a Fluid Catalytic
Cracking Unit. - correct answerserosion
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 answerschlorides
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 answersaccelerated corrosion or erosion.
571 Questions with Answers
API Recommended Practice 574, Inspection of Piping, Tubing Valves, and Fittings, does not cover -
correct answer scontrol valves
The refining industry generally uses what type piping for severe service? - correct answersSeamless
Piping made by rolling plates to size and welding the seams is larger than ______ inches outside
diameter. - correct answers16
Steel and alloy piping are manufactured to standard dimensions in nominal pipe sizes up to ______
inches. - correct answers48
Steel and alloy piping are also manufactured to standard thicknesses designated as schedules in nominal
pipe sizes up to _______ inches. - correct answers36
The actual thickness of wrought piping may vary from its nominal thickness by a manufacturing under
tolerance of as much as _________ percent. - correct answers12.5
Cast piping has thickness tolerance of + ______ inch and - _______ inch. - correct answers1/16, 0
For all nominal pipe sizes of ______ inches and smaller, the size refers to the nominal inside diameter. -
correct answers12
Under tolerance of welded pipe often used in refinery service is ________ inch. - correct answers0.010
For what service is cast iron piping normally used. - correct answersNonhazardous service, such as water.
Tubing is generally seamlessly drawn, but it may be welded. Its stated size is its actual: - correct
answersoutside diameter
,There are many type valves. Which is the incorrect valve type listed below?
a. style valve
b. gate valve
c. check valve
d. globe valve - correct answersa. style valve
What type valve is normally used in a fully open or fully closed position? - correct answersgate
What type gate valves have body and port openings that are smaller than the valves' end opening. -
correct answersReduced-port gate valves
What type of gate valve should not be used as block valves associated with pressure relief devices? -
correct answersReduced-port gate valves
What is a globe valve used for? - correct answersIt is commonly used to regulate fluid flow.
A plug valve consists: - correct answersof 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 answersball valve
What are check valves normally used for? - correct answersThey are used to automatically prevent back
flow.
What are slide valves generally used for? - correct answersThey 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?
a. lap-joint flanged
b. welded
,c. bell-and-spigot
d. weld-neck flanged - correct answersc. 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 answersthreaded joint
Socket-welded joints are usually used in nominal pipe sizes of _____ or smaller. - correct answers2"
Which of the joints listed is the most common found in the petroleum industry? - correct answersbutt-
welded joints
The primary purpose of piping inspection is to: - correct answersensure plant safety and reliability; also
achieve desired quality assurance.
Adequate inspection is a prerequisite for maintaining piping: - correct answersin a safe, operable
condition.
OSHA 1910.119 mandates that: - correct answerspiping be inspected to a code or standard such as API
570.
Regulatory requirements usually cover only those conditions that affect: - correct answerssafety.
The single most frequent reason for replacing piping is: - correct answersthinning due to corrosion.
On piping that is operating, the key to effective monitoring of piping corrosion is identifying and
establishing __________________. - correct answersT.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 answersRT
Leaks in piping systems are most easily detected: - correct answerswhile 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 answerstransducer 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 answersd. 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 answersThe effects of turbulence or velocity.
What type of problem would you expect to find in catalyst, flue-gas, and slurry piping on a Fluid Catalytic
Cracking Unit. - correct answerserosion
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 answerschlorides
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 answersaccelerated corrosion or erosion.
