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3.2u Refresher updated Jan 2024 > 3.2u Mock Exam 1 > Flashcards

3.2u Mock Exam 1 Flashcards

1
Q

Which of the following Is the correct description of a delamitation?

A

Answer: category A In-service defect

a. category B construction imperfection
b. category A construction defect
c. category A in-service defect
d. category B in-service imperfection

Category A: Immidiate

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2
Q

Which of the following is an In-service planar defect‘?

A

Answer: A fatigue crack

a. A pop out
b. A fatigue crack
c. A lamination
d. A corrosion pit

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3
Q

A Bathycorrometer reading of -845mV would indicate?

A

The structure is cathodically protected

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4
Q

ACFM combines which of the following pairs of techniques to determine the length and depth of a surface breaking defect?

A

Answer: Eddy Current and ACPD

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5
Q

Vibrations in a platform leg, which are at 90 degrees to the tidal current flow is caused by

A

Vortex shedding

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6
Q

A Criteria of Non-Conformance is issued by which of the following

A

The Duty Holder

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7
Q

In the Oxidation Reaction an atom will?

A

Become a positive ion

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8
Q

When conducting an MPI on a nodal weld, which of the following techniques would most likely to be used?

A

Close-wrapped coils

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9
Q

What does the ISO number on a digital camera signify?

A

How quickly the camera will react to light

ISO
|— Determines sensitivity of camera sensor to light
|— Higher ISO = Brighter photos
|— Lower ISO = Darker photos
|— Trade-offs: Grain (noise) vs. brightness

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10
Q

If your shutter speed was set at 1/30” and you changed your f-stop setting from f-8 to f-5.6, what would you need to alter your shutter speed to so as to keep the same exposure?

A

Increase the shutter speed by one stop, making it faster. Since your original shutter speed was 1/30”, you might change it to 1/60”.

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11
Q

On which of the following materials can MPI be carried out?

A

Cobalt

(Cobalt is ferromagnetic, and MPI can be carried out on ferromagnetic materials.)

a. Bismuth
b. Cobalt
c. Palladium
d. Antimony

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12
Q

When using Iridium 192 underwater, the safety zone is at what distance?

A

8m

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13
Q

Which of the followlng types of marine growth would you expect to find deeper than 50m

A

Answer: Lophella Pertusa

a.Lophelia Pertusa
b.Bladder Wrack
c.Mussels
d.Kelp

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14
Q

When using a DTM on steel, whlch of the following is true?

A

The frequency of the probe is between 2MHz to 6MHz

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15
Q

The fundamental purpose of protective coating is to ?

A

Insulate the structure from the electrolyte

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16
Q

Which of the following statements Is true?

A

Answer: MPI Is used to detect surface-breaking defects

A. MPI is used to detect surface-breaking defects
B. DTM is used to detect surface-breaking defects
C. Radiography is only used to detect surface-breaking defects
D. ACPD is used to detect surface breaking defects

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17
Q

Which of the following is an in-service defect?

A

Answer: Popout

A. Blowholes
B. Honeycombing
C. Popout
D. Variable Cover

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18
Q

BS EN ISO 9934-2 is the standard for which of the foIIowing?

A

Ferrous oxide inks

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19
Q

The distance between the optical centre of the lens, when set to infinity, and the image sensor’ is a description of which of these?

A

The focal length of a camera lens

The focal length is the distance between the lens’s optical center (specifically the rear nodal point) and the image sensor when the lens is focused at infinity. It is a crucial parameter that affects the perspective and magnification of the images captured by the lens.

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20
Q

Which of the following statements is true :

A

UVA is much safer than UVB

(remember) for Bad

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21
Q

What is normally put between monel cladding and the structure it is protecting?

A

lnert gas

22
Q

Which of the followlng might be considered a disadvantage with ICCP anodes‘?

A

Answer: There is a danger of over-protectlon (embrittlement)

a. The drag on the structure is increased
b. They are made from a material which does not corrode
c. There is a danger of overprotection
d. Current output decreases with time

23
Q

For checking the calibration of a DTM, which of the following is true regarding the calibration block?

A

Answer: lt must be made of the same material as the metal to be tested

a.It should be the same thickness as the metal to be tested
b.It must be made from a material that does not corrode
c. It must be made of the same material as the metal to be tested
d. If tested underwater then a thicker couplant is required

24
Q

The angle of incidence =

A

Is equal the angle of reflection

25
Q

Which of the following should bo reported when carrying out an inspection of a sacrificial anode system

A

Answer: Anode size

a. Anode size
b. Distance to the closest riser
c. Tidal flow in the area
d. Anode composition

26
Q

Which of the following would cause a spurious indication In MPI?

A

Answer: Dirt or scale

a. Grinding mark
b. Dirt or scale
c. Toe undercut
d. Poor cap profile

27
Q

Another name for preferential corrosion is?

A

Weld decay

28
Q

Which of the following would produce a narrower field of view?

A

Answer: Increase the focal length of the lens

a. Change the f-stop to a higher number
b. Decrease the focal length of the lens
c. Increase the focal length of the lens
d. Change the f-stop to a lower number

29
Q

An anomaly based reporting system requires?

A

The diver is to inspect everything in the work-scope.

30
Q

The Dead Zone of a Single Crystal ultrasonic crystal probe, prevents thickness measurements

A

Of thin steel plate under a few mm

31
Q

A digital thickness meter uses which of the following techniques?

A

The Pulse Echo Technique

32
Q

Flooded Member Detection with gamma radiation uses which source?

A

Iridium 192

33
Q

What is the maximum stand-off allowed for a proximity CP reading?

A

100mm

34
Q

In an ICCP system, what does a dielectric shield prevent

A

High density current flowing directly into the structure

35
Q

During an MPI Inspection of a nodal weld using an AC yoke, which of the following would not be detected?

A

Answer: A lamination running parallel with the weld

a. Star cracking within a crater in the weld cap
b. A crack in the HAZ running at 45° to the weld
c. A longitudinal crack in the chord weld toe
d. A lamination running parallel with the weld

36
Q

In an ICCP system, what is a shadow area

A

An area of inadequate cathodic protection

37
Q

By multiplying the RMS figure by 1.414, the sum will be a value of

A

The peak current AC

38
Q

Which of the following is an advantage of a single crystal probe over a twin crystal probe?

A

Answer: Greater penetration

a. Good Near Zone resolution
b. Greater penetration
c. Less power output
d. Can be focused to any depth

39
Q

A GVI of a riser clamp is planned, what cleaning standard should be used

A

SA1

40
Q

If a member is loaded beyond Its yield point it will?

A

Show plastic deformation

41
Q

When Is a Base-line survey carried out?

A

After installation

42
Q

If an atomic particle struck by a sound wave vibrated 6 million times In 2 seconds, what would be its frequency be

A

3MHz

The frequency of a wave is defined as the number of vibrations or oscillations per unit of time. The formula to calculate frequency is:

Frequency (Hz)= Time (seconds) /
Number of Vibrations
​

43
Q

The resolution of a digital camera Is determined by?

A

The Pixel count

( Min: 6MP)

44
Q

The speed of sound through a material was 6000 m/s and the frequency of the probe is 2Mhz, what would the wavelength be

A

3mm

Frequency (Hz)=
Time (seconds)/
Number of Vibrations
​

https://youtu.be/odFXmK0jzH4?si=8hQvsMloqWLdjJje

45
Q

When concrete shuttering Is removed too early, it can cause which type of defect?

A

Tearing

46
Q

Static Loading Is based on?

A

The theoretical 100 year wave

47
Q

When calibrating a Bathycorrometar, what CP reading would you expect on a K-series reference electrode compared with the Ag/AgCl half-cell

A

+42mV+-5mV

48
Q

For which of the following can only the Far Zone be used?

A

Answer: Accurately sizing small defects

a.Measuring wall thickness
b.Measuring laminations
c.Finding volumetric defects
d.Accurately sizing small defects

49
Q

Which type of marine growth would you expect to find deeper than 50m?

A

Answer: Lophelia Pertusa

a.Lophelia Pertusa
b.Bladder Wrack
c.Mussels
d.Kelp

50
Q
A

3.2u Refresher updated Jan 2024 (12 decks)

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