Closed Book API 510 Practice Exam A Questions With Well Defined Answers

What is the maximum allowed time between the testing of pressure relieving devices per API 510? - correct answers 10 years. Who is responsible for the rerating calculations of a Section Vlll Div. 1 vessel? - correct answers The manufacturer or an owner-user engineer (or his designated representative). If the requirements of API 510 are met who determines if a temporary fillet weld patch may be used in a repair? - correct answers An engineer competent in pressure vessel design and the API authorized inspector. The maximum carbon content of weldable steel per ASME Code is? - correct answers .35 % Per API 510 what is the recommended shell temperature during a hydrostatic test of a vessel 1" thick? - correct answers 10 ° F above MDMT. If you were looking for the last date that a pressure relief valve was set, where should this information always be? - correct answers Relief valve's tag. In what two ways may the probable corrosion rate for a new vessel be determined before the first internal inspection? - correct answers From data collected on vessels providing the same or similar service or from published data on vessels providing comparable service. A vessel is to undergo a hydrostatic test after an alteration; the test pressure will be 785 psi. Using standard commercially available gauges what is the minimum and maximum gage pressure range acceptable for this test? - correct answers 0-1500 to 0-3000 psi Which of the following should a progressive record for a pressure vessel contain? - correct answers Construction and design information, operating and inspection history. If performing an external inspection of a vessel what consideration need be given the external insulation? - correct answers If insulation is in good condition and the vessel operates within the high and low temperatures stated in API 510, removal of insulation is not necessary for inspection of the vessel. What must be considered important in the inspection of a metallic lining? - correct answers That there are no holes or cracks present in the lining. What must be done prior to using special inspection procedures after an alteration to a vessel in place of a hydrostatic test? - correct answers Make certain it is permitted by any jurisdictional rules that may exist and consult with an engineer experienced in pressure vessel design and the Authorized Pressure Vessel Inspector. If the corrosion rate of a vessel is determined to be less than a given amount per year, it is possible to exempt the vessel from internal inspections. What is the value of the corrosion rate that cannot be exceeded? - correct answers 0.005" per year. What may happen if vessels are subjected to temperatures above design? - correct answers Creep of the vessel's material may occur. The definition of pressure vessels is; - correct answers A container designed to withstand internal or external pressure. Which is the most severe stress caused by internal pressure in a cylindrical shell? - correct answers Circumferential stress acting along the longitudinal axis. Of the following heads; which is normally required to be the thickest all things being equal? - correct answers Forged flat heads The maximum interval between external visual inspections for an above the ground vessel is; - correct answers Five years What is the maximum inspection interval for a vessel with a remaining safe operating life of less than four years? - correct answers The full remaining safe operating life up to a maximum of 2 years. What does the term construction code mean, as it regards repairs to a pressure vessel? - correct answers The Code the vessel was constructed to including non-standard and jurisdictional special vessels. What Code is used to evaluate a vessel after it has been placed in service? - correct answers API 510 When a vessel is to be entered for inspection which of the following precautions should be observed? - correct answers OSHA rules should be reviewed and followed where applicable. Liquid penetrant inspection can find which type of discontinuity? - correct answers Cracks open to the surface. For proper internal or external visual inspection surfaces must be: - correct answers The type of surface preparation depends on individual circumstances and could be any of the above. Who normally performs welder certification test, that is, which organization is responsible for performance and acceptance? 1 2 3 4 - correct answers Company employing the welder What is the definition of a construction code? - correct answers The Code or standard to which a vessel was originally built. The transmitted film density through the radiographic image of the body of the appropriate hole IQI or adjacent to the designated wire of a wire IQI and the area of interest shall be_minimum for single film viewing for radiographs made with an X-ray source and_____minimum for radiographs made with a gamma ray source. - correct answers 1.8-2.0 The purpose of a Welding Procedure Specification and its Procedure Qualification Record is: - correct answers To prove the weld will provide the required properties Many of the problems that develop in operating vessels may be traced to; - correct answers Faulty materials and workmanship One of the main differences between Nickel alloys and the Carbon and Stainless Steels during welding is - correct answers Nickels are more difficult to weld because the molten weld metal is sluggish and does not flow easily and good sidewall fusion may not be accomplished. Which of the following types of over pressure protection is not found on a pressure vessel? - correct answers Pressure/Vacuum Vent The signature mark of____________is a "clam shell" type fingerprint that has concentric rings called "beach marks" emanating from the crack initiation site. - correct answers fatigue failure Of the types of stresses placed on a thin walled cylinder the most severe is; - correct answers Circumferential The report for qualifying a welder is: - correct answers WPQ Which of the following inspection techniques requires direct visual examination of the test specimen? - correct answers Magnetic particle A welding procedure is a detailed plan developed by whom to ensure sound welds. - correct answers Manufacturer or Contractor The primary cause of deterioration in pressure vessels is: - correct answers Corrosion A shielding gas used for a welding process should be: - correct answers dense Which of the following techniques is considered the primary means to determine the minimum thickness of a vessel's components? - correct answers Ultrasonic thickness measurements. The rules for impact testing of carbon steel in Section VIII vessel materials require what kind(s) of impact test. - correct answers Charpy V-notch only is acceptable. You have measured undercut on a girth weld during the repair to a vessel, it was found to be 1/32 inch in depth. The base metal is 2 inches thick, and you should? - correct answers Accept the weld. What is the minimum length of weld metal to be radiographed for a Welder's Performance Qualification using an NPS 6 inch pipe coupon made of P No 5 materials utilizing the SMAW process? - correct answers The entire circumference of the pipe coupon The API authorized pressure vessel inspector may give prior authorization for repairs that do not involve; - correct answers Pressure tests The two types of impact tests required by Section VIII Div. I are; - correct answers Weld metal and Base metal In Section VIII Div. 1 acceptance of a radiograph is based on; - correct answers the ability to see the essential hole or wire, if a wire type IQI is used. A spot radiograph of a butt weld in a 1 inch thick shell of a vessel marked RT-3 was found to have a rounded indication, the dimension of such an indication according t