510 CB Flashcards
API 510 says that widely scattered pitting can be ignored provided that the:
A. Pit depth is less than 1/2 the minimum required thickness
B. Pit depth is less than 1/2 the vessel current thickness away from the pit
C. Remaining thickness is not less than 1/2 the minimum required thickness
D. Remaining thickness is not less than 1/2 the current thickness away from the pit
C. Remaining thickness is not less than 1/2 the minimum required thickness
Rupture disks are commonly used:
A. When back pressures are variable
B. For steam and air service
C. When the operation pressure is close to set pressure
D. To protect a pressure relief valve from corrosive products
D. To protect a pressure relief valve from corrosive products
After a vessel alteration a 1 inch thick vessel weld is radiographs. The correct hole type IQI is used. When the film is reviewed, which of the following would cause the film to be rejected?
A.A faint light “B” is seen in the film
B. A faint dark”B” is seen in the film
C. The 1T hole is not visible
D. The minimum film density in the weld is 1.7
E. The maximum film density in the weld is 3.4
A. A faint light “B” is seen in the film
D. The minimum film density in the weld is 1.7
Which code provides requirements for hot tapping
A.API 578
B. API 579
C. API 651
D. API 2201
E. API 2217
D. API 2201
Ensuring tightness of box distributor hardware in a column is most commonly done by
A. Lift testing
B. Rattling the hardware
C. Torque testing
D. UT
B. Rattling the hardware
The maximum inspection interval for a pressure relief device in normal service is based on:
A. The lesser of 1/2 remaining life or 10 years
B. Acceptable performance of the device
C. Acceptable performance of the device with a maximum interval of 5 year
D. Acceptable performance of the device with a maximum interval of 10 year
C. Acceptable performance of the device with a maximum interval of 5 year
A carbon steel vessel in caustic service has a temperature excursion up to 425°F. No PWHT has been performed. What type of deterioration could be expected?
A. Intergranular corrosion
B. Stress corrosion cracking
C. Galvanic corrosion
D. High temperature embrittlement
B. Stress corrosion cracking
During a vessel repair or alteration, when can control deposition welding be used as an alternative for postwar heat treating?
A. For P-1 & P3 materials
B. For P1, P3 & P4 materials
C. For P3, P4 and P5 materials
D. For P1 through P11 materials
E. Whenever the inspector reviews and approves the procedure
B. For P1, P3 & P4 materials
All RBI assessments must be:
A. Throughly documented
B. Repeated every 5 years
C. Approved only by the authorized inspector
D. Conducted per guidelines in API 579
A. Throughly documented
What inspection tool can be used to measure the weld pre angle gap?
A. Bridge cam gauge
B. See Bleistift gauge
C. Hi-Lo gauge
D. Pyrometer
E Skew gauge
A. Bridge cam gauge
Which of the following activities are included int the scope of API 510? (Choose all that apply)
A. Rerating a vessel
B. Operating a vessel
C. Replacing a vessel head
D. Internally inspecting a vessel
A. Rerating a vessel
C. Replacing a vessel head
D. Internally inspecting a vessel
Which type of corrosion is most easily missed by a visual examination?
A. Pitting
B. Localized thinning
C. Uniform corrosion
D. Preferential corrosion at welds
C. Uniform corrosion
The maximum allowable working pressure of a vessel is the:
A. Vessels design pressure
B. Vessels designed pressure plus the hydrostatic head
C. Maximum pressure permitted at the top of the vessel
D. Maximum pressure permitted at the vessel bottom which includes hydrostatic head
C. Maximum pressure permitted at the top of the vessel
The use of a fillet weld patch on a vessel‘s shell requires approval from the:
A. Authorized inspector
B. Pressure equipment engineer
C. Authorized inspector and the pressure equipment engineer
D. Owner/user and pressure equipment engineer
C. Authorize inspector and the pressure equipment engineer
During alterations, fabrication approvals( hold points) shall be designated by:
A. The authorize inspector
B. The pressure vessel engineer
C. Both authorize inspector and the pressure vessel engineer
D. Either the authorize inspector or the pressure vessel engineer
A. The authorize inspector
Per API 510, A PRD (relief device) repair organization must:
A. Only have a fully documented quality assurance system
B. Have a fully documented quality assurance system and training program
C. Have a documented QA system and training program and have a VR stamp
D. Only have qualifications that are acceptable to the owner or user
B. 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
A. Coatings
B. Grounding cables
C. Insulation
D. Ladders and platforms
D. Ladders and platforms
Repairs of vessel cracks at A Series stress concentration requires approval by
A. The authorized inspector
B. The pressure vessel engineer
C. Both the owner and the pressure vessel engineer
D. Either the authorize inspector or the pressure vessel engineer
B. The pressure vessel engineer
The seating surfaces on a relief device must have a flatness of
A. 3 light beads/bands
B. 5 light beads/band
C. 10-20 micro-inches
D. 125-250 micro-inches
A. 3 light beads/bands
- An “F” on the radiograph indicates
A. The location of a location marker
B. Backscatter is present
C. Fast film speed
D. The IQI is placed on film side
D. 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
A. Lowest thickness reading in the corroded area
B. Average thickness of all the readings in the corroded area
C. Average thickness of the longitudinal line with the lowest average
D. Average thickness of the longitudinal line with the highest average
C. Average thickness of the longitudinal line with the lowest average
- API 510 takes effect:
A. During the design stage of the vessel construction
B. During the fabrication stage of the vessel construction
C. Once the fabrication Hydro or pre-pneumatic test is completed
D. Once the nameplate is attached
E. Once the vessel is placed in service
E. Once the vessel is placed in service
- Erosion or corrosion in an exchanger shell that is adjacent to the bundle baffles can be most easily found during an internal inspection with
A. Random ultrasonic readings
B. Flashlight beam directed parallel to the shells internal surface
C. Liquid penetrant examination of the bottom half of shell
D. On stream radiography of the shell
B. Flashlight beam directed parallel to the shells internal surface
- During a vessel repair, if a pre-heat is substituted for post world heat treatment, who is required to review this substitution
A. Authorized inspector
B. Owner/user
C. Pressure vessel engineer
D. Authorize inspector and the pressure vessel engineer
E. Repair organization (and have that fox guard the hen house)
C. Pressure vessel engineer
- Which of the following is not an acceptable method for repairing a locally thinned area that is below acceptable thickness?
A. Weld build up
B. Install a but-welded flush patch
C. Install a lap-welded fillet weld patch
D. Install a thick-film coating to arrest the corrosion
D. Install a thick-film coating to arrest the corrosion
- When qualifying a weld procedure using the SMAW process which variable is considered an essential variable
A. Groove design
B. Weld position
C. Shielding gas composition
D. Filler rod F-number
D. Filler rod F-number
- The remaining life of a vessel is 8 years. What is the maximum interval for the external inspection
A. 2 years
B. 3 years
C. 4 years
D. 5 years
C. 4 years
28.An exchanger shell has a locally corroded area. The owner decides to repair this area with weld build up. During this repair, the shelves should be
A. Preheat it to 500°F
B. Checked for distortion
C. Checked for cracking using radiography
D. Post weld heat treated
B. Checked for distortion
- Which of the following is always considered a vessel alteration?
A. Addition of non-reinforced nozzles
B. Weld build up in locally corroded area
C. Replacement of the hemi-spherical head with a Tori-spherical head
D. Addition of a fillet weld patch
C. Replacement of a hemi-spherical head with a Tori-spherical head
- Widely scattered pits can be ignored provided the extent of the pitting does not exceed
A. 7 in.² in a 8 inch diameter circle
B. 8 in.² in a 7 inch diameter circle
C. 12 in.² in a 16 inch diameter circle
D. 16 in.² in a 12 inch diameter circle
A. 7 in.² in a 8 inch diameter circle
