API 510 - Section 5 - Inspection Examination and Testing
Practices Questions With Complete Solutions
A CML is a spot for:
- checking for various damage types (wall loss, cracking, or
HTHA [high temperature hydrogen attack])
- only taking UT thickness readings
- only taking UT or Profile RT thickness readings
- use in RBI assessments and is called Corrosion Monitored
Logic Correct Answer checking for various damage types
(wall loss, cracking, or HTHA [high temperature hydrogen
attack])
A hydrotest is being conducted on a vessel. The relief device is
not removed or blinded. What other option can be used to keep
the relief device from popping?
- Blind the outlet of the relief device
- Place test clamps on the relief device
- Adjust the relief device's valve spring
- Place a rupture disk under the relief device rated for 125% of
MAWP Correct Answer Place test clamps on the relief device
A hydrotest is conducted on an austenitic SS vessel. What is the
maximum allowed content of chloride in the hydrotest water?
- 10 ppm
- 50 ppm
- 100 ppm
- 250 ppm Correct Answer 50 ppm
A hydrotest is conducted on an exchanger shell to check for roll
leaks. What is the recommended test pressure?
,- 100% of MAWP
- 130% of MAWP corrected for temperature
- 150% of MAWP corrected for temperature
- At a pressure specified by the Owner/User Correct Answer
At a pressure specified by the Owner/User
A hydrotest is conducted on an in-service vessel after a major
repair. The vessel MAWP is 100 psig and the test pressure is
150 psig. The close visual examination should be conducted at
what pressure?
-Less than or equal 100 psig
- Anywhere between 125 to 150 psig
- At 150 psig
- At a pressure specified by the Owner/User Correct Answer
Less than or equal 100 psig
A hydrotest is performed on a vessel following the replacement
of a 2.5" thick head. What is the minimum allowed metal
temperature during the test?
(open book)
- 32°F
- 70°F
- 10°F above the vessel's MDMT
- 30°F above the vessel's MDMT Correct Answer 30°F above
the vessel's MDMT
A hydrotest is performed on a vessel with austenitic SS
cladding. What is the maximum allowed water temperature?
(open book)
- 40°F
- 80°F
,- 120°F
- 150°F Correct Answer 120°F
A hydrotest is performed on an existing vessel following the
replacement of a shell plate. The vessel is 1-1/2" thick. What is
the minimum allowed metal temperature during the test?
(open book)
- 32°F
- 70°F
- 10°F above the vessel's MDMT
- 30°F above the vessel's MDMT Correct Answer 10°F above
the vessel's MDMT
A hydrotest is planned for a large low-chrome vessel. Be sure
that:
- the supporting structure is adequate for the weight of the water
- low chloride water is used
- an inhibitor is added to prevent stress corrosion cracking
- a relief device is added with a set pressure ≤ 110% of test
pressure Correct Answer the supporting structure is adequate
for the weight of the water
A leaking flange was repaired by a leak sealing company that
pumped sealant in the gasket area. Later the flange leaks again.
What should be done?
- Examine bolts with UT prior to repumping
- Examine the flange area with profile RT prior to repumping
- Repump the flanges
- Shutdown piping and repair flanges Correct Answer
Examine bolts with UT prior to repumping
, A major repair has been completed on a vessel that was built to
ASME Section VIII 1990 edition. In 2007 the vessel was rerated
to the 2007 edition of Section VIII. A hydrotest will be
conducted. What is the recommended test pressure?
(open book)
- 100% of MAWP
- 130% of MAWP corrected for temperature
- 150% of MAWP corrected for temperature
- At a pressure specified by the Owner/User Correct Answer
130% of MAWP corrected for temperature
A minimum number of CMLs on a vessel is acceptable when
the:
- corrosion rate is low and localized corrosion is not expected
- design pressure is less than 100 psig
- vessel is in an intermittent service
- process fluid is either a Class 2 or Class 3 Correct Answer
corrosion rate is low and localized corrosion is not expected
A nozzle has been added to the vessel. Instead of pressure
testing the entire vessel, just the nozzle will be pressure tested
(temporary cap welded on the inside of the vessel). This
substitution of a component pressure test instead of testing the
entire vessel requires the approval of:
- just the Inspector
- just the Engineer
- either the Inspector or Engineer
- both the Inspector and Engineer Correct Answer just the
Engineer
Practices Questions With Complete Solutions
A CML is a spot for:
- checking for various damage types (wall loss, cracking, or
HTHA [high temperature hydrogen attack])
- only taking UT thickness readings
- only taking UT or Profile RT thickness readings
- use in RBI assessments and is called Corrosion Monitored
Logic Correct Answer checking for various damage types
(wall loss, cracking, or HTHA [high temperature hydrogen
attack])
A hydrotest is being conducted on a vessel. The relief device is
not removed or blinded. What other option can be used to keep
the relief device from popping?
- Blind the outlet of the relief device
- Place test clamps on the relief device
- Adjust the relief device's valve spring
- Place a rupture disk under the relief device rated for 125% of
MAWP Correct Answer Place test clamps on the relief device
A hydrotest is conducted on an austenitic SS vessel. What is the
maximum allowed content of chloride in the hydrotest water?
- 10 ppm
- 50 ppm
- 100 ppm
- 250 ppm Correct Answer 50 ppm
A hydrotest is conducted on an exchanger shell to check for roll
leaks. What is the recommended test pressure?
,- 100% of MAWP
- 130% of MAWP corrected for temperature
- 150% of MAWP corrected for temperature
- At a pressure specified by the Owner/User Correct Answer
At a pressure specified by the Owner/User
A hydrotest is conducted on an in-service vessel after a major
repair. The vessel MAWP is 100 psig and the test pressure is
150 psig. The close visual examination should be conducted at
what pressure?
-Less than or equal 100 psig
- Anywhere between 125 to 150 psig
- At 150 psig
- At a pressure specified by the Owner/User Correct Answer
Less than or equal 100 psig
A hydrotest is performed on a vessel following the replacement
of a 2.5" thick head. What is the minimum allowed metal
temperature during the test?
(open book)
- 32°F
- 70°F
- 10°F above the vessel's MDMT
- 30°F above the vessel's MDMT Correct Answer 30°F above
the vessel's MDMT
A hydrotest is performed on a vessel with austenitic SS
cladding. What is the maximum allowed water temperature?
(open book)
- 40°F
- 80°F
,- 120°F
- 150°F Correct Answer 120°F
A hydrotest is performed on an existing vessel following the
replacement of a shell plate. The vessel is 1-1/2" thick. What is
the minimum allowed metal temperature during the test?
(open book)
- 32°F
- 70°F
- 10°F above the vessel's MDMT
- 30°F above the vessel's MDMT Correct Answer 10°F above
the vessel's MDMT
A hydrotest is planned for a large low-chrome vessel. Be sure
that:
- the supporting structure is adequate for the weight of the water
- low chloride water is used
- an inhibitor is added to prevent stress corrosion cracking
- a relief device is added with a set pressure ≤ 110% of test
pressure Correct Answer the supporting structure is adequate
for the weight of the water
A leaking flange was repaired by a leak sealing company that
pumped sealant in the gasket area. Later the flange leaks again.
What should be done?
- Examine bolts with UT prior to repumping
- Examine the flange area with profile RT prior to repumping
- Repump the flanges
- Shutdown piping and repair flanges Correct Answer
Examine bolts with UT prior to repumping
, A major repair has been completed on a vessel that was built to
ASME Section VIII 1990 edition. In 2007 the vessel was rerated
to the 2007 edition of Section VIII. A hydrotest will be
conducted. What is the recommended test pressure?
(open book)
- 100% of MAWP
- 130% of MAWP corrected for temperature
- 150% of MAWP corrected for temperature
- At a pressure specified by the Owner/User Correct Answer
130% of MAWP corrected for temperature
A minimum number of CMLs on a vessel is acceptable when
the:
- corrosion rate is low and localized corrosion is not expected
- design pressure is less than 100 psig
- vessel is in an intermittent service
- process fluid is either a Class 2 or Class 3 Correct Answer
corrosion rate is low and localized corrosion is not expected
A nozzle has been added to the vessel. Instead of pressure
testing the entire vessel, just the nozzle will be pressure tested
(temporary cap welded on the inside of the vessel). This
substitution of a component pressure test instead of testing the
entire vessel requires the approval of:
- just the Inspector
- just the Engineer
- either the Inspector or Engineer
- both the Inspector and Engineer Correct Answer just the
Engineer
