API 510 CLOSED BOOK 2025
QUESTIONS WITH ANSWERS
API 510 says that widely scattered pitting can be ignored, provided that the - CORRECT
ANSWER>>>>Remaining thickness is not less than half the minimum required thickness
Rupture disks are commonly used - CORRECT ANSWER>>>>To protect a pressure relief valve
from corrosive products
After a vessel alteration, a 1 inch thick vessel weld is radiographed. the correct hole type IQI is
used. when the film is review, which of the following would cause the film to be rejected? -
CORRECT ANSWER>>>>A faint light B is seen in the film. The minimum film density in the
weld is 1.7.
Which code provides requirements for hot tapping? - CORRECT ANSWER>>>>API 2201
Ensuring tightness of box distributor hardware in a column is most commonly done by -
CORRECT ANSWER>>>>Rattling hardware
The maximum inspection interval for pressure relief device in normal service is based on -
CORRECT ANSWER>>>>Acceptable performance of the device with the maximum interval of
five-year
A carbon steel vessel and caustic service has a temperature excursion up to 425°F. No PWHT
has been performed. What type of deterioration could be expected? - CORRECT
ANSWER>>>>Stress corrosion cracking
During a vessel alteration, controlled deposition welding, can be used as an alternative for post
weld heat, treating for which P numbers? - CORRECT ANSWER>>>>P1, P3 & P4 materials
All RBI assessments must be - CORRECT ANSWER>>>>Thoroughly documented
What inspection tool can be used to measure the weld prep angle? - CORRECT
ANSWER>>>>Bridge cam gauge
Which of the following activities are included in the scope of API 510 - CORRECT
ANSWER>>>>Re-rating a vessel, replacing a vessel head, internally inspecting a vessel
Which type of corrosion is most easily missed by a visual examination - CORRECT
ANSWER>>>>Uniform corrosion
The maximum allowable, working pressure of a vessel is the - CORRECT
ANSWER>>>>Maximum pressure permitted at the top of the vessel
, The use of a fillet weld patch on a vessels shell requires approval from the - CORRECT
ANSWER>>>>Inspector and the vessel engineer
During alterations, fabrication approvals (Hold Points) shall be designated by the - CORRECT
ANSWER>>>>Authorized inspector
Per API 510, a PRD (relief device) repair organization must - CORRECT ANSWER>>>>Have a
fully documented quality assurance system and training program
The first step in performing an external inspection of a vessel, is to check the condition of -
CORRECT ANSWER>>>>Ladders and platforms
Repairs of vessel cracks at a serious stress, concentration requires approval by the - CORRECT
ANSWER>>>>Pressure vessel, engineer
The seating surfaces on a relief device must have a flatness of - CORRECT ANSWER>>>>3
light beads / band
An "F" on the radiograph indicates - CORRECT ANSWER>>>>The IQI is placed on film side
A corroded area is being evaluated on a vessel. The area is marked off in a grid with five
longitudinal lines. Multiple UT readings are taken on each line when performing remaining life
calculations for this area, the current thickness reading to use in the calculation is the: -
CORRECT ANSWER>>>>Average thickness of the longitudinal line with the lowest average
Per PCC - 2, the minimum radius on a vessel, fillet welded patch plate is - CORRECT
ANSWER>>>>3"
Erosion or corrosion in a exchanger shell that is adjacent to the bundle baffles can be most easily
found during an internal inspection with - CORRECT ANSWER>>>>Flashlight beam directed
parallel to the shells internal surface
During a vessel repair, if a preheat is substituted for a post weld heat treatment, who is required
to review this substitution? - CORRECT ANSWER>>>>Pressure vessel engineer
Which of the following is not an acceptable method for repairing a locally thinned area that is
below acceptable thickness - CORRECT ANSWER>>>>Add thick-film coating to stop
corrosion
When qualifying a SMAW welded procedure, which variable is considered an essential variable
- CORRECT ANSWER>>>>Filler rod "F-number"
A vessels remaining life is 8 yrs. What is the maximum interval for the external inspection? -
CORRECT ANSWER>>>>4 years
QUESTIONS WITH ANSWERS
API 510 says that widely scattered pitting can be ignored, provided that the - CORRECT
ANSWER>>>>Remaining thickness is not less than half the minimum required thickness
Rupture disks are commonly used - CORRECT ANSWER>>>>To protect a pressure relief valve
from corrosive products
After a vessel alteration, a 1 inch thick vessel weld is radiographed. the correct hole type IQI is
used. when the film is review, which of the following would cause the film to be rejected? -
CORRECT ANSWER>>>>A faint light B is seen in the film. The minimum film density in the
weld is 1.7.
Which code provides requirements for hot tapping? - CORRECT ANSWER>>>>API 2201
Ensuring tightness of box distributor hardware in a column is most commonly done by -
CORRECT ANSWER>>>>Rattling hardware
The maximum inspection interval for pressure relief device in normal service is based on -
CORRECT ANSWER>>>>Acceptable performance of the device with the maximum interval of
five-year
A carbon steel vessel and caustic service has a temperature excursion up to 425°F. No PWHT
has been performed. What type of deterioration could be expected? - CORRECT
ANSWER>>>>Stress corrosion cracking
During a vessel alteration, controlled deposition welding, can be used as an alternative for post
weld heat, treating for which P numbers? - CORRECT ANSWER>>>>P1, P3 & P4 materials
All RBI assessments must be - CORRECT ANSWER>>>>Thoroughly documented
What inspection tool can be used to measure the weld prep angle? - CORRECT
ANSWER>>>>Bridge cam gauge
Which of the following activities are included in the scope of API 510 - CORRECT
ANSWER>>>>Re-rating a vessel, replacing a vessel head, internally inspecting a vessel
Which type of corrosion is most easily missed by a visual examination - CORRECT
ANSWER>>>>Uniform corrosion
The maximum allowable, working pressure of a vessel is the - CORRECT
ANSWER>>>>Maximum pressure permitted at the top of the vessel
, The use of a fillet weld patch on a vessels shell requires approval from the - CORRECT
ANSWER>>>>Inspector and the vessel engineer
During alterations, fabrication approvals (Hold Points) shall be designated by the - CORRECT
ANSWER>>>>Authorized inspector
Per API 510, a PRD (relief device) repair organization must - CORRECT ANSWER>>>>Have a
fully documented quality assurance system and training program
The first step in performing an external inspection of a vessel, is to check the condition of -
CORRECT ANSWER>>>>Ladders and platforms
Repairs of vessel cracks at a serious stress, concentration requires approval by the - CORRECT
ANSWER>>>>Pressure vessel, engineer
The seating surfaces on a relief device must have a flatness of - CORRECT ANSWER>>>>3
light beads / band
An "F" on the radiograph indicates - CORRECT ANSWER>>>>The IQI is placed on film side
A corroded area is being evaluated on a vessel. The area is marked off in a grid with five
longitudinal lines. Multiple UT readings are taken on each line when performing remaining life
calculations for this area, the current thickness reading to use in the calculation is the: -
CORRECT ANSWER>>>>Average thickness of the longitudinal line with the lowest average
Per PCC - 2, the minimum radius on a vessel, fillet welded patch plate is - CORRECT
ANSWER>>>>3"
Erosion or corrosion in a exchanger shell that is adjacent to the bundle baffles can be most easily
found during an internal inspection with - CORRECT ANSWER>>>>Flashlight beam directed
parallel to the shells internal surface
During a vessel repair, if a preheat is substituted for a post weld heat treatment, who is required
to review this substitution? - CORRECT ANSWER>>>>Pressure vessel engineer
Which of the following is not an acceptable method for repairing a locally thinned area that is
below acceptable thickness - CORRECT ANSWER>>>>Add thick-film coating to stop
corrosion
When qualifying a SMAW welded procedure, which variable is considered an essential variable
- CORRECT ANSWER>>>>Filler rod "F-number"
A vessels remaining life is 8 yrs. What is the maximum interval for the external inspection? -
CORRECT ANSWER>>>>4 years
