API 653 PC 26Feb05 Exam Final Closed

Professional Training and Consultation

API 653 Preparatory 26 Feb – 3 Mar 2005, Dammam Page 1 of 14

FINAL EXAM (CLOSED)

Instructions: Choose only one answer, which you think is most appropriate. Use the attached answer sheet in answering the following questions.

1.

2.

The complete or partial removal and replacement of more than 12 inches of a vertical weld joining shell plates is considered a: (a) minor alteration;

(b) minor repair;

(c) major alteration;

(d) major repair.

A single film technique was used to make a radiograph using a Cobalt-60 source. The minimum permitted density in the area of interest is: a. b. c. d.

3.

Cathodic protection is achieved by directing the flow of current from: a. b. c. d.

4.

4.0 1.8 2.0 1.3

A cathode to anode An anode to cathode Both installations are acceptable Neither of a and b

__________ is a change from previous operating conditions involving different properties of the stored product such as specific gravity or corrosivity and / or different service conditions of temperature and / or pressure: (a) Re-rating; (c) Repair;

5.

(b) Change in service; (d) Reconstruction

Describe how a liquid penetrant examination should be performed in order to detect discontinuities which are open to the surface.

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FINAL EXAM (CLOSED) a. b. c. d. 6.

A radiographic technique in which radiation passed through two walls and both the walls are viewed on the same radiograph (double wall, double image – ellipse) the limitation for the outside diameter is: a. b. c. d.

7.

3-1/2” 2” 4” Any diameter possible

Information needed when determining the rate of corrosion: a. b. c. d.

8.

Clean the part, apply the developer, apply the penetrant, remove excess penetrant, inspect the part, clean the part Clean the part, apply penetrant, remove excess penetrant, apply the developer, inspect the part, clean the part Clean the part, apply the developer, apply the penetrant, inspect the part, remove excess penetrant, clean the part Clean the part, apply the developer, apply the penetrant, inspect the part, clean the part

Original thickness or last inspection thickness Current thickness Length of time in service All the above

The maximum acceptable undercutting for base metal in reconstructed tank for horizontal welds is: (a) 1/64"; (b) 1/32"; (c) 1/16"; (d) 1/8"

9.

Tank was inspected in 1985 and the thickness was observed to be 0.32 inch. The thickness observed during inspection in 1995 was 0.30 inch. What is corrosion rate? a. b. c. d.

2 mpy 20 mpy 0.2 mpy 1 mpy




FINAL EXAM (CLOSED) 10.

If remaining corrosion allowance (RCA) at present is 0.05 inch, the next thickness inspection due for above tank shall not be later than: a. b. c. d.

11.

A corroded area of a tank bottom plate is repaired by welding overlay. There is no change in the rating and no change is made on the nameplate. Which of the following is the correct term to describe this process? a. b. c. d.

12.

10 years 15 years 6 years 12.5 years

Reconstruction Repair Alteration None of the above

The maximum interval between internal inspections shall not exceed ____ years when corrosion rate is known: (a) 10;

13.

(c) 5;

(d) 15.

Hot taps are not permitted under which of the following conditions? a. b. c. d.

14.

(b) 20;

On plates requiring PWHT. On ultrasonically sound plate On tanks with dia. more than 80 feet. None of the above.

A tank of 160 ft diameter is to be checked for shell settlement. Minimum number of equally spaced settlement points to be checked will be: a.

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FINAL EXAM (CLOSED) b. c. d. 15.

For a tank made by reconstruction, under what circumstances may a new shell-to-bottom weld be exempt from hydrostatic testing? a. b. c. d.

16.

2°F above the dew point 5°F below the dew point. 10°F above the dew point. At the dew point.

Procedure qualification for welding during repair of tanks is done in accordance with: a. b. c. d.

18.

When the root pass has been visually inspected and the final weld is fully examined, visually and radiographically. Reconstructed tank is never exempted from hydrostatic testing. When the root pass has been visually inspected and the final weld is fully examined, visually and by vacuum box. When the welding method has been reviewed and approved by an engineer experienced in tank design in accordance with API Standard 650.

In atmospheric conditions, bottom coatings may be applied if the steel temperature is: a. b. c. d.

17.

20 24 12

AWS D1.1 API 1104 ASME Section IX All of the above

Widely scattered pits may be ignored under the following conditions




FINAL EXAM (CLOSED) a. b. c. d. 19.

For verification of radiographic sensitivity and image quality, which of the following are used: a. b. c. d.

20.

Cassettes Penetrameters Cameras Collimators

Internal corrosion in the vapour space above liquid level occurs due to: a. b. c. d.

21.

Where the service fluid is corrosive or hard to hold. If sum of pit lengths along any 8” vertical line does not exceed 2” When no pit has depth which results in the minimum thickness being less than one-half the minimum acceptable thickness of the shell plate exclusive of corrosion allowance b and c

Hydrogen Sulphide vapour Water vapour Oxygen Any combination of the above three

API 650: Appendix M provides requirements for Tanks designed to operate at the following range of temperatures: a. b. c. d.

Exceeding 260°C Above 90° - 260°C Below 90°C Below 0°C





For a reconstructed tank as per API 653 Verticality (out-ofplumbness) of top of the shell shall not exceed, a. b. c. d.

23.

When lining is applied to bottom on inside of tank, the lining shall extend ___________ up the shell. a. b. c. d.

24.

Vapour space in the shell On the roof In the shell below liquid level Anywhere on the tank

A radiograph was having density near the penetrameter equal to 3.0. Hence the acceptable density range of the radiograph is: a. b. c. d.

26.

6” min 12” min 18” min 3” min

Hot tap can be performed on: a. b. c. d.

25.

1/300 of total tank height 1/250 of total tank height 1/400 of total tank height None of the above

1.7 to 4 2.55 to 3.9 2.0 to 4.0 None of the above

The examiner for conducting magnetic particle testing on the tank welds shall be: a. b. c. d.

Qualified as per ASNT Level II or III Able to read Jagger-2 Qualified as per ASME Sec. V None of the above





In atmospheric conditions, temperature of at least: a. b. c. d.

28.

(b) 5

(c) 4

(b) 2

done

at

(d) 3

(c) 3

Hydrostatic tests shall reconstructed tank. (b) 8

be

(d) 4 held

(c) 24

for

____

hours

for

the

(d) 72

In a radiographic film of a weld, how is back scatter checked? (a) (b) (c) (d)

32.

be

How many specimens must be used for impact tests from a single test coupon or test location?

(a) 2 31.

can

How many equally spaced measurements are required for the thickness averaging technique?

(a) 1 30.

blasting

2°F above the dew point. 5°F below the dew point 5°F above the dew point At the dew point

(a) 2 29.

grit

By use of a penetrameter By film density Using lead letter “B” All of the above

In general, if shell thickness does not exceed ____ inch, it does not require further assessment for brittle fracture: (a) 0.25

(b) 0.75

(c) 1.00

(d) 0.50





34.

35.

36.

Potential for according to:

brittle

fracture

(a)

API 650 – 7th edition

(b)

API 650 – latest edition

(c)

API 650 – 4th edition

(d)

None of the above

exists

for

tanks

constructed

Three types of external inspections are: (a)

Scheduled, routine and liquid penetrant

(b)

Scheduled, routine and UT thickness

(c)

Scheduled out of service, routine and UT thickness

(d)

Unscheduled, routine and liquid penetrant

Welders qualifications shall expire as they do not weld: (a)

Within a given process for a 6 month period

(b)

Using a given procedure for a 6 month period;

(c)

On a tank for 6 months;

(d)

For a 3 month period.

What are penetrameters used for: (a)

A penetrameter is used for radiographic technique in that it serves as an image quality indicator

(b)

It indicates the magnetic properties of the materials

(c)

To check penetrant quality in PT inspection

(d)

To check weld penetration during welding





38.

39.

40.

Unless otherwise agreed to by the purchaser, what is the minimum nominal width of a shell plate? (a) 36 inches

(b) 48 inches

(c) 72 inches

(d) 96 inches

“Each vertical weld must be radiographed (either spot or full radiography) for the bottom shell course (i.e., course no. 1) for all tanks constructed to current API 650 Basic Standard.” This statement is: a.

False

b.

True

c.

Whether any radiography is required or not depends on shell thickness.

d.

Depends on tank design Engineer’s opinion

According to ASME Sec. IX, welding filler metals are grouped into groupings (based on their usability) as: (a) P-numbers

(b) F-numbers

(c) Z-numbers

(d) ASTM spec.

When reviewing a radiograph, a light image of the letter B can be seen on the film with dark background. (a)

This is cause for rejection

(b)

This is not cause for rejection

(c)

This is the same as a light letter B

(d)

An unusual exposure

safety

hazard

existed


during

the




42.

43.

44.

Which of the following penetrant system is generally considered least sensitive? a.

Water-washable – visible dye

b.

Solvent removable – visible dye

c.

Water-washable – fluorescent dye

d.

Post-emulsification – visible dye

The nondestructive examination method to be used for a particular inspection should be determined by the: a.

Availability of certified NDE examiners

b.

Length of time since the last inspection

c.

Age of the component to be inspected

d.

Type, location, and orientation of the expected flaws

Out of the following four options in LPT, most sensitive results can be obtained by: a.

Visible penetrant – water washable

b.

Fluroscent penetrant – post emulsifying type

c.

Visible – solvent removable type

d.

Visible – post emulsifying type

A PQR was qualified in 5G position using a new welder. But production welding is to be done in 2G position. Which of the following are applicable as a minimum? a. Both procedure and welder shall be re-qualified in 2G position. b. The qualified procedure can be used ,only welder needs to be re-qualified c. The welder is qualified, but the procedure needs requalification d. Both procedure and welder need not be re-qualified. /var/www/apps/conversion/tmp/scratch_4/166700825.doc 8/23/2013 / 21:21:08 a8/p8 / NCD




46.

Minimum thickness evaluation may be conducted by? a.

Use

b. c. b.

Ultrasonic testing D.P. Check None of above

an

external

micrometer

only

For procedure qualification documentation: a. b. c. d.

47.

of

WPS gives the procedure test data and results of tensile/bend test PQR gives ranges qualified by procedure test PQR gives procedure test data and WPS gives ranges qualified WPS and PQR both give test data and ranges qualified

Identify correct statement from following: a. Tensile test for procedure qualification is passed only if base metal failure occurs at or above Specified Minimum Tensile Strength (SMTS) of base metal b. Tensile test for procedure qualification is passed only if base metal failure occurs above SMTS of base metal c. Tensile test for procedure qualification is passed even if weld metal failure occurs above 95% of SMTS of base metal d. None of the above

48.

When using radiographs to qualify welder, the acceptance standards used are found in: a.

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FINAL EXAM (CLOSED) b. c. d. 49.

An RBI assessment can be used to alter the internal inspection strategy provided: a) b) c) d)

50.

ASME Section IX ASME Section VIII The referencing code

RBI is performed considering likelihood of failure and consequence of failure. The RBI is fully documented. A third party conducts the RBI. Both “a” and “b” above

You are reviewing a WPQ for a welder. The test results indicate the following: a. b. c.

Satisfactory side bend Face bend satisfactory Visual satisfactory

Will these tests qualify the welder? a. b. c. d.

Yes No, because bend tests are not correct type. Not enough information given No, because radiography is essential for welder qualification


API 653 PC 26Feb05 Exam Final Closed

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