API 653 Closed Book Practice Exam missed questions

Which of the following is an advantage of the galvanic cathodic protection system?
A) Annual maintenance costs are generally low
B) The effective life of the anodes is usually 50 yrs
C) A single anode covers large surface area
D) It is easy to test the system's effectiveness

Hot taps are permitted

Repaired or replaced bottom welds shall be examined with either a vacuum box or by using

Which of the following does NOT increase the risk of brittle failure?
A) Increasing the allowable liquid height
B) Change to a lower operating temp
C) Change to a product with increased viscosity
D) Change to a product with a higher specific gravity

Which type of external floating-roof is the most susceptible to sinking

The welding position 4G is a

If an atmospheric tank is air tested, the pressure should NOT exceed

Which of the following new welds does NOT need to be examined by magnetic particle or liquid penetrant methods?
A) Stress relieved assemblies welds
B) The nozzle neck-to-shell welds
C) The insert plate-to-shell welds
D) The reinforcing plate-to-shell welds

During a tank reconstruction, a 0.750" shell course can be dismantled by cutting

Fatigue will NOT occur in carbon steel if stresses are below the

The grain structure of weld metal is most similar to that found in

Which of the following is NOT a significant factor in galvanic corrosion?
A) Stray AC currents
B) Soil resistance
C) Position of materials in galvanic series
D) Relative size (area) of cathode and anode

Which welding discontinuity is located @ the toe of the weld?

A tank with cathodic protection has a second bottom added above the old floor. This tank may:

Dry pyrophoric material can cause

When adding new shell penetrations, when shall an insert plate be used

When removing a weld defect, cavities resulting from gouging or grinding shall be examined visually and by the

A major cause of tank lining failures is inadequate

If substituting an air-test for a tank hydrotest the air pressure should not exceed

Which of the following is an advantage with an impressed current cathodic protection system (as compared to a galvanic system)?
A) Safety aspects are minimized
B) Maintenance & operating costs are minimal
C) Effective for tanks of all sizes
D) Requires infrequent monitoring

During a repair or alteration, new welds in shell plate greater than 1" thick shall be

Pitting is found on the shell. Corrective action must take place when the

An impressed current cathodic protection system was sized for a specific tank. At the first inspection it was determined that the bottom side corrosion rate was extremely high. What is the likely cause?

What is a common problem for flame arrestors

When walking on the roof of a cone roof tank, the inspector should

A statistical method is used to determine the probable minimum remaining thickness. Typically how much of the floor is scanned to gather info for the statistical analysis

During a major tank repair, the top shell course is replaced with new material. The new shell course is 0.250". How many RT's are required in the new vertical welds?