3.2u Mock Exam 1 Flashcards
Which of the following Is the correct description of a delamitation?
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
Which of the following is an In-service planar defect‘?
Answer: A fatigue crack
a. A pop out
b. A fatigue crack
c. A lamination
d. A corrosion pit
A Bathycorrometer reading of -845mV would indicate?
The structure is cathodically protected
ACFM combines which of the following pairs of techniques to determine the length and depth of a surface breaking defect?
Answer: Eddy Current and ACPD
Vibrations in a platform leg, which are at 90 degrees to the tidal current flow is caused by
Vortex shedding
A Criteria of Non-Conformance is issued by which of the following
The Duty Holder
In the Oxidation Reaction an atom will?
Become a positive ion
When conducting an MPI on a nodal weld, which of the following techniques would most likely to be used?
Close-wrapped coils
What does the ISO number on a digital camera signify?
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
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?
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”.
On which of the following materials can MPI be carried out?
Cobalt
(Cobalt is ferromagnetic, and MPI can be carried out on ferromagnetic materials.)
a. Bismuth
b. Cobalt
c. Palladium
d. Antimony
When using Iridium 192 underwater, the safety zone is at what distance?
8m
Which of the followlng types of marine growth would you expect to find deeper than 50m
Answer: Lophella Pertusa
a.Lophelia Pertusa
b.Bladder Wrack
c.Mussels
d.Kelp
When using a DTM on steel, whlch of the following is true?
The frequency of the probe is between 2MHz to 6MHz
The fundamental purpose of protective coating is to ?
Insulate the structure from the electrolyte
Which of the following statements Is true?
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
Which of the following is an in-service defect?
Answer: Popout
A. Blowholes
B. Honeycombing
C. Popout
D. Variable Cover
BS EN ISO 9934-2 is the standard for which of the foIIowing?
Ferrous oxide inks
The distance between the optical centre of the lens, when set to infinity, and the image sensor’ is a description of which of these?
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.
Which of the following statements is true :
UVA is much safer than UVB
(remember) for Bad
What is normally put between monel cladding and the structure it is protecting?
lnert gas
Which of the followlng might be considered a disadvantage with ICCP anodes‘?
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
For checking the calibration of a DTM, which of the following is true regarding the calibration block?
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
The angle of incidence =
Is equal the angle of reflection
Which of the following should bo reported when carrying out an inspection of a sacrificial anode system
Answer: Anode size
a. Anode size
b. Distance to the closest riser
c. Tidal flow in the area
d. Anode composition
Which of the following would cause a spurious indication In MPI?
Answer: Dirt or scale
a. Grinding mark
b. Dirt or scale
c. Toe undercut
d. Poor cap profile
Another name for preferential corrosion is?
Weld decay
Which of the following would produce a narrower field of view?
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
An anomaly based reporting system requires?
The diver is to inspect everything in the work-scope.
The Dead Zone of a Single Crystal ultrasonic crystal probe, prevents thickness measurements
Of thin steel plate under a few mm
A digital thickness meter uses which of the following techniques?
The Pulse Echo Technique
Flooded Member Detection with gamma radiation uses which source?
Iridium 192
What is the maximum stand-off allowed for a proximity CP reading?
100mm
In an ICCP system, what does a dielectric shield prevent
High density current flowing directly into the structure
During an MPI Inspection of a nodal weld using an AC yoke, which of the following would not be detected?
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
In an ICCP system, what is a shadow area
An area of inadequate cathodic protection
By multiplying the RMS figure by 1.414, the sum will be a value of
The peak current AC
Which of the following is an advantage of a single crystal probe over a twin crystal probe?
Answer: Greater penetration
a. Good Near Zone resolution
b. Greater penetration
c. Less power output
d. Can be focused to any depth
A GVI of a riser clamp is planned, what cleaning standard should be used
SA1
If a member is loaded beyond Its yield point it will?
Show plastic deformation
When Is a Base-line survey carried out?
After installation
If an atomic particle struck by a sound wave vibrated 6 million times In 2 seconds, what would be its frequency be
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
The resolution of a digital camera Is determined by?
The Pixel count
( Min: 6MP)
The speed of sound through a material was 6000 m/s and the frequency of the probe is 2Mhz, what would the wavelength be
3mm
Frequency (Hz)=
Time (seconds)/
Number of Vibrations
https://youtu.be/odFXmK0jzH4?si=8hQvsMloqWLdjJje
When concrete shuttering Is removed too early, it can cause which type of defect?
Tearing
Static Loading Is based on?
The theoretical 100 year wave
When calibrating a Bathycorrometar, what CP reading would you expect on a K-series reference electrode compared with the Ag/AgCl half-cell
+42mV+-5mV
For which of the following can only the Far Zone be used?
Answer: Accurately sizing small defects
a.Measuring wall thickness
b.Measuring laminations
c.Finding volumetric defects
d.Accurately sizing small defects
Which type of marine growth would you expect to find deeper than 50m?
Answer: Lophelia Pertusa
a.Lophelia Pertusa
b.Bladder Wrack
c.Mussels
d.Kelp
