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api 653 chapter 8 > FINAL Day > Flashcards

FINAL Day Flashcards

1
Q

burn through (2)

A
  1. penetration a thin compartment w/ the welding arc

2. hole or depression in the root bead of a single groove weld due to excessive penetration

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2
Q

max lap patch thickness?

A

1/2”

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3
Q

another name for planar tilt

A

rigid tilt

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4
Q

Repair methods in pontoon? (2)

A
  1. rewelding of joints

2. use of patch plates

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5
Q

Roof repairs are acceptable

A

as long as it will resolve the roof to a condition enabling it to perform

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6
Q

sulfate reducing bateria?

A

local anaerobic conditions exists

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7
Q

type of internal floating roof?

A

metallic pan

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8
Q

if grounding condition doubts what to do?

A

check the resistances

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9
Q

NDE for bottom joints (4)

A
  1. vacuum test
  2. light diesel oil
  3. pressure test
  4. MP/LP
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10
Q

when should measurements be taken to verify dimensional tolerances?

A

B4 hydro

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11
Q

Atm corrosion , CR accelerated up to what temp?

A

250F

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12
Q

prior to energizing what must be checked?

A

structure to soil

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13
Q

Define repair per AI653

A

situatable for safe condition

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14
Q

max projection per API653 for sheet to bottom outside toe?

A

3/8”

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15
Q

what to do with cracks if found in shell to bottom?

A

REMOVED

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16
Q

what is a discontinuity?

A

interruption of a typical structure of a material , lack of homogeneity in it mechanical, physical and metallurgical properties

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17
Q

caustic corrosion?

A

localized metal loss w/ presence of salt , NaOH, and KOH

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18
Q

false calls who responsible?

A

owner/operator

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19
Q

welder who pass the required test for groove welds shall be qualified for

A

most fillet welds

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20
Q

conflict between API653 and regulation what to do?

A

regulation shall govern UNLESS 653 is more struct that API governs

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21
Q

how often to inspect venting?

A

periodically

22
Q

Repair plates (4) (min/max size / thickness)

A
  1. min = 4”
  2. max = 48 x 72”
  3. thickness cannot be greater than 1/2”
  4. min thickness is 3/16”
23
Q

NDE on penetrations using insert plates with butt welds?

A

full RT

24
Q

measurement of tank settlement performed by?

A

personnel experienced

25
Q

Shell cracks NDE?

A

VI and LP/MP for added sensitivitiy

26
Q

what is a backing?

A

material or device place against the back side of the joint adjacent to the joint root to support/shield molten weld material

27
Q

frangible roof max size of fillet weld joining roof plate to the top angles

A

3/16”

28
Q

max out of plan settlement during hydrotest may be calculated by formula or?

A

additional settlement points

29
Q

What can affect venting capacity of flame arrestors?

A

solidification of vapors

30
Q

no good backscatter

A

LIGHT image of B on DARK background

31
Q

unknown RT schedule for efficiency for SS

A

0.7

32
Q

when is welding permitted in critical zone?

A

when it is widely scatter pits

33
Q

source of some CP interference?

A
  1. electrical railroads
  2. weld machines
  3. impressed current CP
  4. thermoelectric generators
34
Q

when to repair the CP system ?

A

if inspection indicated that CP is no longer adequate

35
Q

max critical repair plate thickness

A

1/4”

36
Q

API2000

A

safe venting

37
Q

2015

A

safe entry

38
Q

2201

A

hot tap

39
Q

safety procedures for conducting internal inspection complies?

A

state/federal pertaining to confined space

40
Q

RT/UT exam/method accordance

A

ASME V

41
Q

RT/UT examiner accordance

A

ANST

42
Q

high termal expansion what controls?

A
  1. avoidance of excessive restraints

2. PWHT to relieve residual stress generated during welding

43
Q

lap patch repair that crosses any butt weld of vertical/horizontal seam must have an overlap of

A

6”

44
Q

weld on patch permitted in the critical zone to an adjacent existing patch?

A

Not allowed

45
Q

internal lining and RPB are consideration for?

A

determining the need for and method of CP system

46
Q

when external UT measure are used to determine the CR, the extend of such measure is determined by

A

owner/operator

47
Q

prove up and scanning operator are what type of test?

A

qualification test?

48
Q

welded on patch for tank bottoms (2)

A
  1. never be place over area of global dishing

2. less than 12” cannot be over lap bottom seam

49
Q

RBI shall be reviewed/aprpoved

A

RBI team

50
Q

temp/perm attachments NDE?

A

examined by MP

api 653 chapter 8 (36 decks)

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