api 572 practise question.ppt

API 572: Inspection of Pressure Vessels

(Towers, Drums, Reactors, HeatExchangers, and Condensers)

PUSAT PEMBANGUNAN TENAGA INDUSTRI(PUSPATRI)

5th – 9th November 2007

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46. Several different method are used to construct pressure vessel.

Most pressure vessel are constructed today using ____________construction.

1. Welded2. Hot forged3. Riveted4. Multilayer

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47. The most common material used to construct pressure vessel is:

1. Titanium2. Austenitic stainless steel3. Monel4. Carbon steel

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48. Construction codes are periodically revised as the design of

pressure vessel improve and as new construction materials become

available. A pressure vessel should be maintained according to the:

1. Requirements under which it was designed and constructed

2. Standards and specification of the owner/user3. Principle and specifications of the jurisdiction4. Guidelines of the NBIC

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49. The basic reasons for inspection are:

1. To meet the pre-requisites of the ASME codes2. To fulfill the provisions of the API 5103. To satisfy the requirement of OSHA4. To determine the physical condition of the vessel and to

determine the type, rate and causes of deterioration.

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50. Metal losses are not always constant but are a function of such variables as:

1. Chemicals, caustic, inorganic and organic acids2. Excessive pressure3. Low temperature4. None of the above

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51. Erosion is the attrition of a surface caused by:

1. Loss of material caused by sulfur and chloride2. Attrition of material cased by acid or caustic attack3. The impingement of solid particles or liquid drops4. Wearing down of a material caused by oxidation.

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101. Which of the following is the principal method of inspecting non-

metallic linings?

• UT• Spark testing• Visual• Profile radiofraphy

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52. Many problems with pressure vessel are caused by faulty fabrication. Which item on the following list is not related to

faulty fabrication.

1. Poor welding2. Chloride stress corrosion cracking3. Improper heat treatment4. Dimensional tolerance

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92. Which of the following are causes of faulty fabrication?

• Improper fit• Poor welding• Improper heat treatment• All the above

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53. The external inspection of a pressure vessel should start with:

1. Vessel foundation and anchor bolts2. Ladders, stairways, platforms or walkways connected or

bearing on the vessel3. Nozzles and connecting piping4. Protective coating and insulation.

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54. If an internal inspection of a vessel is not the initial one, the first

step is to:

1. Make a walk around visual check of the vessel2. Review the previous records of the vessel to be inspected3. Check with the vessel operators for unusual operating

conditions4. Make a preliminary manway inspection

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88. What API standard is used for air cooled heat exchangers?

• 945• 510• 574• 661

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93. External inspections of pressure vessels should start with which of

the following:

• Ladders, stairways• Ladders, foundations• Guy wires, support• Nozzles, anchor bolts

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95. The condition of concrete support is determined by

• RT• Hydrostatic testing• Hammering• Visual inspection with some picking and scrapping

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97. “U” bolts on guy wires should be installed so that the “U” bolts is

against the:

• Either live or dead end of wire• Live or long end of wire• Dead or short end of wire• None of the above

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94. The most important conditions to check when examining metallic

linings are:

• That there is no corrosion• That no holes or cracks exist• That linings are properly installed• All the above

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Which of the following is not a tool for measuring thickness of vessel

shells?

1. Acoustic emission transducers2. Ultrasonic instrument3. Radiography with steps gages4. Corrosion button and depth drilling

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98. Temporary repairs to scattered pitting may be made by using

which of the following;

• Epoxy based materials• Metallic linings• Concrete• rubber

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Creep is dependent upon three factors. Two of these factors are:

• Stress, pH• Pressure time• Stress, time• Temperature, pressure

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101. Which of the following is the principal method of inspecting non-

metallic linings?

• UT• Spark testing• Visual• Profile radiofraphy

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103: Excess thickness in a vessel can result from which of the Following?

• Temperature increase• Corrosion allowance• Using nominal plate thickness in lieu of exact value

calculated• Number 2 & 3

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104. The selection of tools for the measurement of thickness depends on several factors. One of these is:

• Accuracy desired• Temperature of surface• Type of product contained in the vessel.• Cleanliness of surface to be examined.

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105. Which of the following is the most important factor in determining the frequency of inspection interval?

• The erosion rate at critical sections• The rate of deterioration and the remaining corrosion

allowance• The rate of deterioration and the remaining thickness• The Operating temperature and pressure

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106. Which of the following is not likely location of corrosion for a

heat exchanger?

1. Where dissimilar metals are in close contact2. On the external surface of the shell3. On the outside surface of tubes midway between baffles4. On the bottoms of shells in contact with non-corrosive

deposits

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123. A pressure vessel is in service and has no corrosion data available. Where should thickness readings be taken?

1. At least one of each shell course, head and nozzle2. One in each quadrant of each shell course and head3. One in each quadrant on each shell course at one-foot

intervals4. At one foot spacing on each shell course

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129. What cleaning methods would apply for wet sulfide cracking?

1. Power wire brushing2. Power chipping3. Hot water, steaming and abrasive grit blasting4. High pressure water blasting

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Sample of API 572 Question