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SAIW QC Level 2 > exam mc Paper 2 > Flashcards

exam mc Paper 2 Flashcards

1
Q

Which one of the following statements is correct?

A. Preheating increases hardness
B. Preheating increases cooling
C. Preheating increases dilution
D. Preheating increases shrinkage stress

A

C. Preheating increases dilution

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2
Q

if an austenitic stainless steel plate is cold formed into a dished end, it undergoes:

A. work hardening
B. discontinuous yielding
C.grain growth strain aging
D. work hardening

A

D. work hardening

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3
Q

The hardness of martensite depends mainly on:

а. carbon content
b. the alloy content
c.the rate of cooling
d. the rate of heating

A

а. carbon content

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4
Q

A steel described as being quenched and tempered, will have improved tensile properties because it has:

a. a controlled chemical composition
b. been heat-treated
c. been quality tested;
d. been vacuum melted :

A

a. a controlled chemical composition

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5
Q

Nickel alloys are mainly used where:

a. high tensile strength is specified
b. high temp. mechanical properties are specified
c. Low temp. mechanical properties are specified
b. good wear resistance is specified

A

c. Low temp. mechanical properties are specified

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6
Q

what effect will increasing the pre heat have on the welding a grey cast iron?

a. it reduces the HAZ
b. if promotes the formation of matensite
c. it prevents iron carble from forming
d.it increases the risk of cracking

A

a. it reduces the HAZ

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7
Q

The loss of corrosion resistance in austenitic stainless steels due to carbide formation and chromium depletion is known as:

a. sigma formation
b. sensitisation
c. stabilisation
d. delta formation

A

b. sensitisation

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8
Q

On the DeLong diagram, the amount of ferrite is indicated by:

a. the percent ferrite
b.the nickel equivalent
c. the ferrite number
d. the chromium equivalent

A

c. the ferrite number

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9
Q

If a buttering technique is used to weld 304 stainless to mild steel, what electrode should be used for the buttering layer?

a. E7018
b. E308
c. E309
d. E9018

A

c. E309

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10
Q

Which of the following melals has the highest thermal conductivity?

a. Carbon steel
b. Stainless steel
c. Aluminium
d. Nickel

A

c. Aluminium

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11
Q

How is an aluminium alloy cleaned before welding?

a. Using mechanical methods
b. Using grit blasting
c. Using flame cleaning
d.It does not need to be cleaned

A

a. Using mechanical methods

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12
Q

Which of the following has the greatest effect on increasing the possibility of hydrogen cracking?

a.Nickel
b. Manganese
c. Vanadium
d. Carbon

A

d. Carbon

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13
Q

One of the reasons for excluding oxygen from weld metal is to prevent:

a. weld cracking
b. the weld from cooling too slowly
c. the weld from cooling too quickly
d. weld porosity

A

a. weld cracking

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14
Q

Cracks in welds may be due to:

a. solidification problems
b. hydrogen problems
c. excessive stresses
d. all of the above

A

a. solidification problems
b. hydrogen problems
c. excessive stresses
d. all of the above

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15
Q

How does normalising improve the toughness of carbon steels?

a. By causing precipitation hardening
b. By refining the austenite grains and promoting fine pearlite
c. By tempering martensite
d. By removing stresses

A

b. By refining the austenite grains and promoting fine pearlite

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16
Q

In a steal that has improved creep properties at elevated temperatures, which one of the following elements helps in this improvement?
a. Tungsten
b. Manganese
c. Molybdenum
d. Carbon

A

c. Molybdenum

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17
Q

Fracture markings typical of a mechanical fatigue failure are:

a. clam shell type markings
b. branching cracks
c. a herringbone pattern
d. none of the above

A

a. clam shell type markings

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18
Q

When a metal regains its original shape when stress acting upon it is removed, the metal is said to have:

a. ductility
b. plasticity
c. malleability
d.elasticity

A

d.elasticity

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19
Q

Which of the following defects is difficult to defect using radiography?

a. Slag inclusions
b. Porosity
c. Undercut
d. Lack of side wall fusion

A

d. Lack of side wall fusion

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20
Q

Gamma rays and x-rays are part of a family of waves called:

a. acoustic waves
b. light waves
c. electromagnetic waves
d. transverse waves

A

c. electromagnetic waves

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21
Q

Magnetic particles patterns help define:

a. the size of welds and part dimensions
b. the types of discontinuities or defect
c. the metal hardness
d.the welding processes uses

A

b. the types of discontinuities or defect

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22
Q

What are the two forms of magnetic particles used in magnetic testing?

a. Liquid and powder
b. Magnetic and non-magnetic
c. Liquid and paste
d. Hot and cold

A

a. Liquid and powder

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23
Q

Which of the following are not associated with liquid penetrant testing?

a. Water washable dyes
b. Solvent removable dyes
c. Post emulsifiable dyes
d. Water emulsifiable dyes

A

d. Water emulsifiable dyes

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24
Q

What should be avoided when applying a developer?

a. A thick heavy coating
b. A thin even coating
c. A smooth even coating
d. All of the above

A

a. A thick heavy coating

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25
Q

From the group of testing methods listed, which would be best for detecting heal affected zone cracking?

a. Radiography
b. Ultrasonic
c. Magnetic particle
d. Liquid penetrant

A

b. Ultrasonic

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26
Q

Which of the following NDT methods would most likely detect lack of sidewall fusion in ferritic steel welds?

a. Liquid penetrant testing
b. Magnetic particle testing
c. Radiographic testing
d. Ultrasonic testing

A

d. Ultrasonic testing

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27
Q

Lamellar tearing has occurred in a steel fabrication. Could this have been detected before welding
using:

a. radiographic testing
b. liquid penetrant testing
c. magnetic particle testing
d.None of the above

A

d.None of the above

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28
Q

Which of the following does not refer to corrosion?

a. Destruction of metal by a chemical environment
b. Eating away of metals
c. Destruction of metals by abrasion
d. Rust

A

c. Destruction of metals by abrasion

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29
Q

Weld decay is caused by:

a. excessive grain growth in the HAZ
b. depletion chromium at the grain boundaries due to carbon precipitation
c. loss of chromium during transfer in the arc
d. precipitation of niobium (columbium) carbide at the grain boundaries

A

b. depletion chromium at the grain boundaries due to carbon precipitation

30
Q

Welding of a steel plate with a CE of 0.45 would require preheating to:

a. prevent the formation of sulphides
b. prevent hardening in the HAZ
c. prevent the formation of carbides
d. to improve mechanical properties in the weld

A

b. prevent hardening in the HAZ

31
Q

Corrosion cannot take place in the absence of

a. nitrogen
b. hydrogen
c. oxygen
d. argon

A

c. oxygen

32
Q

What type of magnetic field does a magnetic particle testing yoke produce?

a. Circular and square
b. Circular and longitudinal
c. Circular only
d. Longitudinal only

A

d. Longitudinal only

33
Q

Which of the following standards relate to Quality Management Systems?

a. BS 2633
b. ISO 9001
c. ISO 15614
d. ISO 3834

A

d. ISO 3834

34
Q

Thermal expansion is:

a. the increase in temperature of metal adjacent to the weld
b. the change in shape of metal as it becomes malleable near the liquid state
c. the increase in volume of metal due to increased temperature
d. due to rapid cooling rates in the weld and base metals.

A

c. the increase in volume of metal due to increased temperature

35
Q

Centerline hot cracking is more likely with:

a. shallow, round weds
b. wide groove angles
c. deep, narrow welds
d. vertical welds

A

c. deep, narrow welds

36
Q

Interpass temperature control on all welding procedure tests is mandatory.

a. True
b. False

A

a. True

37
Q

The ability of a fabricator lo weld a specific material with a specific welding process is demonstrated by a:

a. procedure qualification record
b. welding procedure specification
c. shop order
d. process specification

A

a. procedure qualification record

38
Q
  1. In a tensile test, a brittle fracture would be indicaled if the fracture surface:

A.shows a reduction in size
B. is flat and featureless
C.breaks in the parent material
D. breaks at 45° to the applied load

A

B. Is flat and featureless

39
Q
  1. The likelihood of brittle fracture in steels will increase with:

A. a large grain formation
B. a reduction of in - servica lemperature to sub zero
C. ferritic rather than austenitic steels
D.all of the above

A

D. All of the above

40
Q

CTOD tests are usually carried out:

A. in an impact machine
B. in slow tension
C. in slow bending
D. in slow compression

A

C. In slow bending

41
Q

The ISO 15614 standard refers to which of the following?

A.Welder approval lesting
B.Welding equipment
C.Welding procedure approval
D.Consumables for welding

A

B. Welding equipment

42
Q

The most common type of failure associated with sharp fillets, notches and undercut is:

A crystallisation
b fatigue
C corrosion
D brittle fracture.

A

B fatigue

43
Q

For fatigue service conditions, which of the following should be avaided?

A Flush ground, full penetration joint, welded from both sides
B Full penetration joint, welded from both sides
C Flush ground, full penetration joint, welded from one side
D Full penetration joint with permanent backing strip

A

D. Full penetration joint with permanent backing strip

44
Q
  1. tensile lest assesses:

a. impact values
b. stress
c. strain
d. both b and c

A

d. both b and c

45
Q

The percentage elongation of a metal undergoing a tensile lest is a measure of:

a. elasticity
b. plasticity
c. ductility
d. malleability

A

c. ductility

46
Q

The CTOD test measures:

a. the energy to cause failure
b. the opening displacement at the crack tip during final fracture
c. the high temperature strength of a material
d. the notch toughness of a material.

A

b. the opening displacement at the crack tip during final fracture

47
Q

The five basic types of loading are:

a. tension, compression, bending, warping , torsion
b. bending, winding compression, torsion, shear
c. tension, compression, shear, bending torsion
d. inertia, compression, shear, torsion bending

A

c. tension, compression, shear, bending torsion

48
Q

On site assessments for creep damage are done by:

a. radiographic testing
b. the replica technique
c. hardness testing
d. strain gauging

A

b. the replica technique

49
Q

The maximum reinforcement of a weld is determined by:

a. the applicable code
b. base metal thickness
c. operating temperature in some cases
d. all of the above

A

a. the applicable code

50
Q
  1. Lamellar tearing occurs:

a. in the weld
b. in the fusion zone
c. in the HAZ
d. beneath the HAZ and in the rolled direction of the material

A

d. beneath the HAZ and in the rolled direction of the material

51
Q
  1. Which of the following is a method of hardness testing steels?
    a. Brinell
    b. Jominy
    c. Tensile
    d. Charpy
A

a. Brinell

52
Q
  1. The carbon equivalent of steel is closely related to its:

a. tensile strength
b. hardenability
c. yield strength
d. impact resistance

A

a. tensile strength

53
Q

the preferred type of bend lest for a double vee groove butt weld, welded with the gas metal welding process, would be:

a. a guided bend
b. a root bend
c. a side bend .
d. a face bend

A

c. a side bend .

54
Q
  1. What type of test is Charpy testing considered to be?

a. A compression test
b. An indentation test
c. An impact test
d. A tension test

A

c. An impact test

55
Q
  1. Which of the following destructive tests is not normally required for weld procedure approval tests for butt welded carbon steels in accordance with ISO 15614?

a. All weld tensile
b. Macro examination
c. Transverse bend test
d. Transverse tensile

A

b. Macro examination

56
Q

in ultrasonic testing, the medium used between the crystal surface of the probe and the test specimen is referred to as:

the lubricant
the conductor
the couplant
the sealer.

A

the couplant

57
Q

The reflected sound waves from an internal flaw are interpreted by what kind of instrument?

a, An ammeter
b. Earphones
c an oscilloscope
d. A voltmeter

A

c an oscilloscope

58
Q

One of the limitations of ultrasonic testing is that:

a. it takes a highly trained and skilled operator’
b. it is very expensive to perform
c. the results of the test are not very accurate
d. Is both expensive and inaccurate

A

a. it takes a highly trained and skilled operator’

59
Q

On what type of surfaces is ultrasonic testing difficult to perform?

a. Flat and smooth surfaces
b. Those made of plastic
c. Complex configurations and rough surfaces .
d.None of the above

A

c. Complex configurations and rough surfaces

60
Q

What items are used by a radiographer?

a. Film badges or survey meters
b. Protective gloves and masks
c. Lead lined clothes
d. Safety glasses and shoes

A

a. Film badges or survey meters

61
Q

Radiographic inspection can detect defects:

a. on the surface
b. below the surface
c. above and below the surface
d. all of the above

A

a. on the surface
b. below the surface
c. above and below the surface
d. all of the above

62
Q
  1. A radiograph of a piece of steel with varying thicknesses will appear:

a. lighter on the thick section and darker on the thin section b. darker on the thick section and lighter on the thin section c. lighter all the way across
d. darker all the way across

A

a. lighter on the thick section and darker on the thin section

63
Q

A wavy, dark line on the edge of the weld on a radiograph would most likely be:

a. linear porosity
b. incomplete penetration
c. undercut
d.a crack

A

b. incomplete penetration

63
Q

how are radioactive isotopes stored?

a. In air light, sealed containers
b. In fireproof vaults
c. In shielded containers
d. In locked tool boxes

A

c. In shielded containers

64
Q

What non-destructive testing method would most often be applied to the main welds in pressure vessels?

a. Penetrant testing
b. Magnetic particle testing
c. Radiographic testing
d. Visual testing

A

c. Radiographic testing

65
Q

What is the most important advantage of using radiographic inspection?

a. Portability
b. Low operator skill required
c. There is a permanent record.
d. Low cost

A

c. There is a permanent record.

66
Q
  1. A large grain structure in steels is said to produce:

a. low ductility values
b. low fracture toughness values
c. high fracture value values
d. high tensile strength

A

b. low fracture toughness values

67
Q

In radiographic inspection, how is the density of film measured?

a. By an oscilloscope
b. By a densitometer
c. By an ammeter
d. By a light meter

A

b. By a densitometer

68
Q

An austenitic stainless steel welded joint may suffer from:

a. weld decay
b. sensitisation
c. solidification cracking
d. all of the above

A

a. weld decay
b. sensitisation
c. solidification cracking
d. all of the above

69
Q

Carbon equivalent values are useful to determine:

a. weldability aspects
b. crack sensitivity aspects
c. typical mechanical properties
d. all of the above

A

a. weldability aspects

SAIW QC Level 2 (23 decks)

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