Level 2 Question [Ref]
II-1 In longitudinal wave inspection of the parent metal adjacent to a weld, minimum sensitivity is usually set such that [1 ] a) it is 6 dB over the 80% FSH level for the appropriate side drilled hole
b) it is 20 dB over the 80% FSH level for the appropriate side drilled hole
c) backwall echo is 100% FSH in the absence of defects
d) none of the above
II-2 When doing an ultrasonic weld inspection material thickness, weld preparation configuration, defect type and orientation are the main considerations for [1 ] a) probe dimensions
b) frequency
c) probe angle
d) all of the above
II-3 Where geometry permits in weld inspection, the distance you need to move the probe back from the weld to ensure 100% volume inspection is [1 ] a) 1/2 skip from the weld centre-line
b) 1 full skip from the weld centre-line
c) 1/2 skip from the edge of the heat affected zone
d) 1 full skip from the HAZ edge
II-4 During manual scanning, detection of obliquely oriented defects is improved by [1 ] a) using a lower frequency
b) longitudinal wave inspections
c) adding swivel motion to the angle beam probe
d) all of the above
II-5 A sharp signal with large amplitude response seen from one side of a weld but not the other, having a sharp drop off with both rotational and orbital motion would indicate the presence of [1 ] a) porosity
b) lack of fusion
c) slag
d) cracking
II-6 The use of ultrasonic methods to check fillet welds is usually restricted to determining the extent of penetration. This is best facilitated by [1 ] a) a guidance system to hold the probe at a fixed distance
b) c-scan presentations
c) 45 and 60 degree probes in tandem
d) holographic techniques
II-7 The weld defect that results when a weld puddle solidifies from the outer edges and causes stresses sufficient to produce cracking is [2 ] a) crater cracking
b) underbead cracking
c) transverse cracking
d) puddle jumping
II-8 The purpose of removing a weld cap by grinding it flush with the base metal in preparation for ultrasonic testing is to [2 ] a) reduce scatter from redirection of beam
b) improve volumetric coverage
c) increase sensitivity to near surface defects
d) all of the above
II-9 In the welding process, removal of weld metal and base metal from the opposite side of a welded joint to ensure complete penetration upon welding from that side is called [3 ] a) de-welding
b) beveling
c) back gouging
d) joint preparation
II-10 The preferred welding term for a blowhole is [3 ] a) tunneling
b) gusher
c) porosity
d) gas pocket
II-11 The purpose of backing material at the root of a weld is [3 ] a) to support molten weld metal
b) a heat sink
c) to prevent lack of fusion
d) all of the above
II-12 In welding processes, a preplaced filler metal which is fused into the root of a joint and thereby becomes part of the weld is a [3 ] a) chill
b) chaplet
c) consumable insert
d) covered electrode
II-13 A crack occurring in the depression at the termination of a weld bead is called a [3 ] a) hot tear
b) termination crack
c) heat check crack
d) crater crack
II-14 In a welded joint, the minimum distance from the root to the weld face is the [3 ] a) hypotenuse
b) leg
c) effective throat
d) length of weld
II-15 The purpose of flux material in welding is [3 ] a) to stabilize the welding arc
b) to protect the molten weld from atmosphere
c) both a and b
d) none of the above
II-16 In welding, the area of base metal melted as determined on a cross-section of the weld is the [3 ] a) heat affected zone
b) fusion zone
c) dead zone
d) twilight zone
II-17 The portion of base metal that has not been melted but whose mechanical properties or microstructure have been altered by heat of welding or cutting is called the [3 ] a) fusion zone
b) heat affected zone
c) dead zone
d) twilight zone
II-18 In a welding process using inert gas as a part of the operation, the purpose of the inert gas is to [3 ] a) react with the filler metal
b) provide a protective atmosphere over the weld puddle
c) increase the heat at the arc
d) harden the weld metal deposited
II-19 The protrusion of weld metal beyond the toe, face or root of a weld is called [3 ] a) overlap
b) undercut
c) pass
d) bead
II-20 Another term for the welding phenomenon called "suck-back" is [3 ] a) undercut
b) blow-through
c) concave rout
d) overlap
II-21 Cracking occuring in the heat affected zone that does not usually extend to the surface of the metal is [3 ] a) transverse cracking
b) underbead cracking
c) laminal cracking
d) post weld heat treatment cracking
II-22 In tig welding the electrode manipulated by the welder is [3 ] a) made of tungsten
b) not consumed
c) both a and b
d) none of the above
II-23 You are required to scan the full volume of an unground tee joint weld on 100mm thick plate. Scanning is to be done from one side of the weld prep plate using a 45ø probe. What is the scan distance you must move from the tee plate surface to ensure 100% [4 ] a) 142mm
b) 230mm
c) 283mm
d) 300mm
II-24 You are to scan an unground 50mm thick butt weld from one side of the weld only. The plate is 20mm thick and full volumetric coverage of the weld plus 20mm heat affected zone is needed. Weld face is 20mm wide. What is the maximum scan distance from the [4 ] a) 40mm
b) 68mm
c) 98mm
d) 120mm
II-25 A sharp narrow signal whose amplitude remains constant when orbited and drops off quickly with probe rotation is probably [4 ] a) lack of fusion
b) an isolated pore
c) slag
d) a transverse crack
II-26 A ragged, cluster of individual spikes is located and determined to be a defect. Sound path varies, amplitudes vary with rotation and orbiting with the probe. But the defect does not drop off completely when orbited. It is most likely a [4 ] a) crack
b) slag inclusion
c) porosity cluster
d) lack of fusion
II-27 A sharp narrow defect signal is located during a standard A-scan of a weld. Rotation and orbit of the defect cause it to drop off quickly with lateral probe motion the signal remains constant in both amplitude and sound path. It is most likely a [4 ] a) slag inclusion
b) crack
c) lack of fusion
d) pore
II-28 Given a butt weld in a 55mm thick plate, ground flush, you locate a large sharp narrow reflector with a soundpath of 154mm and exit point 128mm from the weld centreline using a 45ø probe. If it has length of 20mm the flaw is likely [4 ] a) lack of penetration
b) mis-match
c) lack of fusion
d) suck back
II-29 A curve showing the relationship of amplitude to distance travelled to reflectors of the same area is usually referred to as a(n) [5 ] a) AVG curve
b) DAC curve
c) DGS curve
d) NDT curve
II-30 An ultrasonic display in rectangular coordinates where distance or time of flight is represented in one direction and probe displacement represented on the other and reflected pulses as bright marks on a dark background (or vise versa) is called a(n) [5 ] a) A-scan
b) B-scan
c) C-scan
d) tomograph