3.1u questions Flashcards by Bruno Santinoni

1 Which of the following will increase the depth of field

A increase the shutter speed
B decrease the shutter speed
C increase the F number
D decrease the F number

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2 Which of the following will increase the field of view of a lens

A long focal length
B short focal length
C decrease the aperture
D increase the shutter speed

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3 Colours will disappear as light travels through seawater because of which of the following

A absorption
B scatter
C reflection
D refraction

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4 What would be the expected voltage for a structure, which has sufficient protection if it is compared to an Ag/AgCl half-cell

A 800mv to 1100mv
B -640mv to –800mv
C -800mv to –1100mv
D over –1100mv

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5 Which of the following would be the expected potential of a zinc anode when compared to a Ag/AgCl half-cell

A 1000mv to 1050mv
B 800mv to 1100mv
C -1000mv to –1050mv
D -1100mv and above

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6 Who is responsible for ensuring that sufficient inspection is carried out on an offshore structure

A Lloyds register of shipping
B the independent verification body
C the duty holder
D none of the above

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7 When inspecting welds using close visual inspection how far either side of the weld must be cleaned to at least SA 2.5

A 50mm either side of the weld
B 100mm either side of the weld
C 200mm either side of the weld
D 400mm either side of the weld

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8 When will the most comprehensive inspection be carried out on an offshore structure

A during fabrication
B post installation
C in service
D none of the above

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9 How many groups does BS499 put metal and weld defects into

A 2
B 4
C 6
D 8

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10 What is the most common radiographic isotope used offshore today for weld inspection

A caesium 137
B iridium 192
C plutonium
D radium

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11 If using radiography offshore what will be the most important consideration

A cost
B likely defects
C test procedures
D safety

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12 What type of defects will radiography locate most effectively

A surface breaking defects
B all sub surface defects
C volumetric defects
D planar defects

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13 Which of the following would be described as a volumetric defect

A cracks
B porosity
C lack of root fusion
D lamellar tearing

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14 What is a planar defect

A a two dimensional defect
B a three dimensional defect
C a solid inclusion
D undercut

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15 Which of the following would be termed a miscellaneous defect according to BS499

A undercut
B lack of sidewall fusion
C lamellar tearing
D spatter

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16 Which of the following would be the most likely location for a fatigue defect in a offshore structure

A the weld cap
B the heat affected zone
C the root
D the toe

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17 In the case of a 35mm camera what does the 35mm relate to

A the width of the film
B the diagonal of the film
C the length of the negative
D the width of the negative

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18 What is focal length

A the distance to the subject
B the distance either side of the subject which is optically clear
C the length of the film
D the distance light travels from the front of the optics to the film plane

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19 Which of the following could be used as a sacrificial anode on a steel structure

A zinc
B aluminium
C less noble materials
D all of the above

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20 Which terminal of the impressed current power supply should be connected to the structure

A the negative
B the positive
C either
D neither

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21 Which of the following is not a technique which would normally be used to locate defects on a structure

A digital thickness meter
B ACFM
C CP meter
D radiography

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22 What is the major limiting factor of a digital thickness meter

A it cannot be used on a steel structure
B it can only read on thin steel
C it cannot read through paint coats
D it will only show a distance to the major reflector

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23 Which of the following best describes the piezo electric effect

A changes electricity into sound energy
B changes sound energy into electrical energy
C changes sound into light energy and vice versa
D both A and B

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24 Which of the following techniques does a digital thickness meter use

A tandem probe
B double wall single image
C pulse echo
D none of the above

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25 From the point of view of inspection on a offshore structure, which of the following would be considered to be the major advantage of CCTV A it will show sub surface defects B it gives very high resolution C it gives real time pictures D it can be used to size sub surface defects

26 What is the main advantage of photography over CCTV A it will show sub surface defects B it gives very high resolution C it gives real time pictures D it can be used to size sub surface defects

27 When carrying out a visual inspection which of the following would be described as gross structural damage A a missing bolt from a riser clamp B a small dent in a horizontal member C blisters on a paint coating D all of the above

28 Which of the following is the most common radiographic source used for weld inspection offshore today A caesium 137 B iridium 192 C plutonium D X-ray

29- in photography how would the F number be worked out for any given lens A aperture divided by focal length B focal length divided by the aperture diameter C depth of field divided by the film size D none of the above

30 What would a silver /silver chloride half-cell be used for A making the tea B measuring the thickness of a structure C measuring the corrosion protection of a structure D measuring the depth of a defect

31 Which of the following is the general definition of stress A stress = load area B stress = area Load C stress = weight Height D none of the above

32 Which of the following describes compressive stress A load pulling on a member B load twisting a member C load pushing a member D load being removed from the member

33 What is meant by a stopper hole or arrestor hole A a hole drilled tat either ends of a crack to stop its propagation B a hole which does not penetrate the member C a hole with a rope stopper through it D none of the above

34 What is meant by fatigue A progressive overloading of a solid B snatch load breaking a brace C cyclic stress causing local hardening of the material D loading beyond the yield stress

35 What is the underside of a concrete beam called A the bottom B the underside C the invert D the soffit

36 What name is given to the anchor point of a pre-stressed tendon used to reinforce a concrete structure A cachetage point B anchor point C ducting point D tremie tube

37 What is the main problem when using putty to make a cast on an offshore structure A obtaining the material B the putty will dry out in water C the cast will deform when removed and transported D none of the above

38 Which of the following could be used to assess the depth of a surface breaking defect in a steel structure A DTM B FMD C MPI D ACPD

39 Which of the following best describes photogrammetry A taking photographs at intervals of lapsed time in order to assess changes in seabed conditions B stereo photography with computer assessment C stereo photography D sub sea photography

40 Which of the following cold be used to protect a steel structure against corrosion in the splash zone A Henderson rings B cathodic protection C anodic protection D coatings

41 What occurs during the anodic reaction A the atom gains an electron B the atom loses electrons C the atom becomes a negative ion D none of the above

42 What is meant by a cycle in ultrasonics A one complete particle vibration B one hertz C the speed with which the sound travels in the material D none of the above

43 What is meant by anaerobic corrosion A corrosion with the aid of oxygen B corrosion without oxygen C corrosion inside a pipe D corrosion in a droplet of water

44 Which of the following are factors affecting marine growth A depth B temperature C water flow rate D all of the above

45 What would be the major effect of soft marine growth on a structure A increasing the mass so reducing the natural frequency B decreasing the likelihood of finding CVI defects C increases the drag on the structure D Blocks intakes and outfalls

46 If the velocity of water flow were doubled how would the drag force be affected A stay the same B it will be doubled C it will be trebled D it will be four times increased

47 Which of the following types of marine growth would be most affected by depths outside the photic zone A plants B soft growth C animals D hard growth

48 how often should risers and conductors be inspected A at least every 5 years B post incident C decided by the duty holder D both B & C

D maybe?

49 Which of the following best describes a butt weld A a weld in which the bulk of the weld material lies outside the planes or thickness of the parent plate B a weld in which the bulk of the weld material lies within the planes or thickness of the parent plate C a weld where the parent plates are brought together end to end D a weld where the parent plates are joined with some overlap

50 Assuming access to both sides of the weld which of the following would never be found by a visual inspection A lack of penetration in a single V butt weld B lack of penetration in a double V butt weld C surface breaking porosity D undercut

51 When reporting a defect on a weld which of the following should be reported A distance to datum B length of the defect C orientation of the defect relative to the weld D all of the above

52 When diving on a structure which is protected by a platform based impressed current protection system how should the system be A fully active B turned off C removed D none of the above

53 A diver employed to carry out MPI must have which of the following certificates A 3.1u B 3.2u C 3.3u D 3.4u

54 How does a concrete structure protect its reinforcement cage A concrete is waterproof B paint coats C anodic protection D passivation

55 Which of the following metals can be used as sacrificial anodes for the protection of a steel structure A iron B platinum C magnesium D all of the above

56 At what stage of the structures life will the most complete inspection be carried out A during fabrication B post launch C in service D none of the above

57 Under current UK legislation who will be responsible for ensuring safe levels of inspection are carried out on a offshore structure A the certifying authority B the verification body C the HSE D the duty holder

58 What is meant by inherent defects A defects which the structure inherits from the welding B defects which the structure inherits from the raw material C defects which the structure will develop in service D defects on an offshore structure

59 If a load is found to be pulling on a brace which of the following types of stress will the brace be under A compressive B shear C tension D all of the above

60 Which of the following best describes drag A fluid flow attempting to move the object in the opposite direction to the flow B fluid flow attempting to move the object in the same direction as the flow C a tiring swim D the structure being moved

61 What would happen if a structure were loaded beyond the yield stress A the structure would fail B the structure would return to normal as soon as the load was relieved C the structure would be unaffected D the structure would become permanently deformed

62 Which of the following would you expect to see if a structure has failed through ductile failure A large local deformation B no local deformation C paint coat removal D none of the above

63 What is meant by a jarlan hole A a hole in the metal B a hole through which a cable is passed C a perforation in a breakwater wall D the underside of a concrete beam

64 Which of the following will increase the rate of marine growth on a offshore structure A localised increases in pressure B localised increases in temperature C Henderson rings D wave action

65 Which of the following is least detrimental to an offshore structure when it is being cleaned A needle gun B hydraulic wire brush C water jet D scrapper

66 According to ISO 8501-1 which of the following best describes cleaning to paint coat A SA1 B SA2 C SA2.5 D SA3

67 What is meant by scour A removal of paint coat B removal of weld metal during defect examination C removal of marine growth D removal of seabed

68 If a blister is located on an offshore structures paint coat what should be done A burst it and inspect underneath B burst it and leave it C burst it and repaint D leave it alone

69 Which of the following could be the effects of debris A impact damage B galvanic corrosion C overloading of the cathodic protection system of the structure D all of the above

70 What is meant by the term soffit when applied to concrete inspection A the top of the beam B the underside of the beam C the side of the beam D none of the above

71 How many defect types are there in concrete inspection A 2 B 4 C 6 D 8

72 How does concrete protect the reinforcement cage against corrosion A cathodic protection B anodic protection C paint coats D passivation

73 If the term soldier is applied during concrete inspection which of the following would best describe the feature A a shutter B a tie rod C a shutter support D reinforcement

74 When inspecting concrete which of the following would be described as a blemish A construction joint B honeycombing C cast in socket D water jet damage

75 What is meant by a cachetage point A an anchor point of a pre-stressed tendon B an anchor point of re-bar C an anchor point of the structure D any of the above

76 Which of the following best describes a fillet weld A a weld where the bulk of the weld metal lies within the planes or thickness of the parent plates B a weld where the bulk of the weld metal lies outside the planes or thickness of the parent plates C a weld which is only welded from one side D a weld which is not completed

77 What is meant by a volumetric defect A a defect which has no volume B a defect which has large surface area but low volume C a defect which has large volume for a relatively low surface area D a defect which is on the surface of the weld

78 How many defects does BS499 group metal and weld defects into A 2 B 4 C 6 D 8

79 Which of the following is classed as a cavity during weld inspection A copper inclusion B porosity C tungsten inclusion D laminations

80 Which of the following can detect surface breaking defects through non-conductive coatings A ACPD B digital thickness meter C FMD D electro magnetic detection techniques

81 Which of the following will not be used in defect location during an offshore inspection program A CP meter B MPI C DTM D visual inspection

82 Which of the following best describes the reason for filling out photo log sheets during photographic inspection A to allow the photo tech to assess the film properly B to record basic details as to the frame exposure subject etc C to send to the company rep D to help in engineering assessment

83 What is meant by bracketing the exposure during photography A setting the correct exposure first time B using the camera on auto mode C taking three pictures varying the exposure to ensure the correct result D marking the exposure down on the photo log and putting it in brackets

84 If there is a need to increase the depth of field which of the following should be done A increase the F number B decrease the F number C change the film D increase the strobe output

85 When using close up prods for an NDT inspection which of the following should be done A bisect the angle between the components B include a scale C ensure the inspection site is properly lit D all of the above

86 Which of the following best describes film speed A the speed with which the film can be advanced B the length of time a film is exposed C a numerical value relating to the sensitivity of the film D none of the above

87 What is backscatter A light reflected back from suspended particles in the water B light reflected back from the subject C light not received at the camera D light sent out from the strobe

88 What is the photosensitive part of a colour negative photographic emulsion A silver/silver chlorides B silver halide crystals C silver bromide crystals D iridium 192

89 Which of the following is the main advantage of an SIT video camera A it produces high quality colour pictures B it is very robust C it is very small D it works in very low light conditions

90 When starting a CCTV inspection what should be done A a video log should be completed B an introduction should be completed C the camera should be centred properly D all of the above

91 What is the significance of the order of materials in the galvanic series A any metal less noble will be protected by the more noble B any metal less noble will become the cathode when connected electrically to a more noble metal C any metal less noble will become the anode when connected electrically to a more noble metal D none of the above

92 What does a CP meter actually measure A protection levels on all structures B potential differences C time and therefore distance D wall thickness

93 What is galvanic corrosion A dissimilar metal corrosion B crevice corrosion C biological corrosion D overloading of the protection system

94 Which of the following metals would normally be used for an impressed current auxiliary node A magnesium B zinc C aluminium D platinum

95 Which terminal of the impressed current protection power supply would be connected to the auxiliary anode A the positive B the negative C either D both

96 What would be the expected reading for an Ag/AgCl half cell on an unprotected structure A 550mv – 640mv B 800mv – 1000mv C -550mv - -640mv D -800mv - -1000mv

97 What reading would you expect to see on a bathycorrometer when applied to an over protected structure A -800mv B -900mv C -1050mv D -1100mv

98 Which of the following best describes the piezo electric effect A a material which possesses this property will when subjected to a mechanical vibration produce an electrical signal B a material which possesses this property will when subjected to a electrical signal produce an mechanical vibration C a material which possesses this property will when subjected to a electrical signal produce an mechanical vibration and vice versa D none of the above

3.1u questions Flashcards

(98 cards)