Practice Set 5

15. Aluminium cannot be used in most areas where vibrations combine with high stress. There are special care has to be taken to remove all stress raisers. Which below is considered a stress raiser?

A notch A scratch A sudden change of section A notch and a scratch All of the above

16. 'Weld decay' of stainless steel is associated with:

pitting corrosion. crevice corrosion. intergranular corrosion. uniform corrosion.

17. Lateral resolution is prinicipally a function of?

Wavelength Probe diamater Material velocity Beam width

18. Cheapest alloying element for increasing strength and hardness of steel is:

manganese. carbon. nickel copper

19. Abrasive finishing could be classified by which of the following methods?

Wire brush Polishing Buffing All of the above

20. Which penetrant system is best suited when checking for wide shallow flaws?

Water washable Post emulsifiable Solvent removable Leak through

21. The predominant central frequency of an ultrasonic beam is closely related to?

The diamater of the transducer The transducers natural thickness resonance The velocity of sund in the test material The grain size of the test material

22. In PT black light (UV light) intensity measurements are made using a:

radiometer photometer pie gauge spectrometer

23. Which of the following piezoelectric materials tend to depolarise with age?

Lithium sulphate Lead zirconate titanate Lead metaniobate Barium titanate

24. The latent image is a shadow of a specimen?

After development Before development Both of the above Neither of the above

25. Non-aqueous wet developers are applied to the part surface by which of the following methods?

Spraying Dipping Flowing All of the above

26. Wells outside the normal finished casting are there to allow for

gas evolution sand erosion shrinkage airlocks

27. What do the letters AISI?

American Institute of Steel Industries American Iron and Steel Industries American Industries of Steel Institutes American Iron and Steel Institute

28. On a scan display the dead zone refers to?

The distance contained within the near field The area outside the beam spread The distance covered by the front surface pulse width and recovery time The area between the near field and far field

29. Which of the following is a common inclusion in welding?

Metal oxide Slag Non-metallic solid All of the above

30. The employer is responsible for certification of

Level I personnel Level II. personnel Level III personnel all of the above

31. Generally, sources of high specific activity are more desirable because they have ____ self absorption.

higher the same lower no

32. Flow bonding is a particular type of bond, which listed below would be classed as a flow bond?

Fusion welding Braze welding Metal arc welding None of the above

33. How may a ferromagnetic material be demagnetised?

Using an AC Coil Heating above the curie temperature Reversing DC Coils All the above

34. When performing a liquid penetrant test, the surface of the test part should be:

slightly wet free of oil, grease, water and other contaminants clean and smooth all of the above

35. The product of a blast furnace is known as

iron steel pig iron stainless steel

36. In PT developer times are usually in the range of

30 s 10 − 60 min. 2 − 40 min. 5 − 6 min.

37. Volume change due to thermal expansion or contraction of a constant volume system during a pressure change measurement test?

Does not affect the leakage rate calculations Is automatically accounted for by the corrections Is not normally significant Has a very significant error on the leakage rate results

38. The angles for the fore-oblique direction of view borescope are:

0 − 45º. 0 − 90º. 1 − 89º. 1 − 60º.

39. In some cases, the training hours recommended for NDT Level I are greater than for Level II, why?

In preparing for qualification at Level I, the candidate should always receive more training than for Level II, regardless of the NDT method. Candidates for Level II generally have more formal education than those for Level I. Some methods require more initial training at Level I because of differences in complexity and manipulative skills. none of the above

40. When applying the term annealed to pure aluminium it is interpreted to mean

work hardening re-crystallization stress releasing normalising

41. Pipe and tube may be manufactured using which technique?

Extruding Rolling Resistance welding All of the above

42. Which of the following metals can be magnetized?

Martensitic stainless Ferritic stainless Austenitic stainless Both A and B None of the above

43. Electro plated surfaces are usually quite thin. Which common NDT method is used to measure the plate thickness?

MT UT ECT PT

44. During the hardening of steel which of the following quenching media will produce the severest quench?

Water Brine Oil Air

45. An alloy steel is a steel containing one or more

elements atoms mixtures components

46. The term used to define the period of time in which the test part is covered with penetrant is:

waiting time soak time (drain time) dwell time bleeding time

47. What are three essential parameters involved in the dynamics of gases?

Volume, temperature, pressure Density, atomic weight, pressure Pressure, specific gravity, atomic weight Volume, temperature, density

48. When a change of wall thickness is required in a casting what would give the best design results?

Sudden section change Small radii Large radii All of the above

49. Hypermetropia is otherwise known as?

Short sight Long sight Normal sight Magnification sight

50. Which is the main alloying element of austenitic stainless steels?

Nickel Manganese Molybdenum Chromium

51. Which listed below have approximately square cross sections?

Slab Bloom Billet All of the above Both B and C

52. Prolonged exposure to infrared radiation can cause

hypo thermia hyper thermia iso thermia pseudo thermia

53. To prevent formation of hot crack in 304 grade austenitic stainless steels welds, one may recommend:

increasing in preheat temperature. slow cooling after welding in asbestos cover. welding consumables with minimum 5% ferrite. welding consumables with no ferrite.

54. Materials that contain halogens are called?

Fluorines Inert Halides Ozone

55. One type of forging operation uses

rolling casting open dies extrusion

56. Normalising heat treatment of carbon steel gives the ______ microstructure.

coarse pearlite fine pearlite martensite fine ferrite

57. Which of the following casting processes is best used for small intricate casting up to 2 kg requiring close tolerances?

Centrifugal casting Investment casting Continuous casting Permanent mold casting

58. Which of the following could affect the properties of an engineering material?

Composition Heat treated condition Crystal structure All of the above both A and B

59. Which of the following couplants would be considered to be most suitable for use on hot aluminium surfaces?

Water Wall paper paste Grease Glycerine

60. Conductivity instruments can be used to sort materials with different:

magnetic permeability. electrical resistivity. electrical conductivity. all of the above.

61. Which is the basic type of true defect that would be indicated during a bubble leak test by a continuous flow of bubbles?

Lack of fusion at root of weld A hole or crack through the test boundary Slab inclusion in center of weld Extended area of surface defects or cracks

62. In neutron radiography for a given material attenuation?

Varies directly with thickness Is inversely proportional to thickness Varies exponentially with thickness Is inversely proportional to the thickness squared

63. When using x-rays or gamma rays which of the following is not correct?

They travel in straight lines and obey the inverse square law They travel at the speed of light with constant amplitude They effect photographic emissions They have a low wavelength and low frequency

64. What problem is overcome by using the post emulsifiable penetrant method?

Overwashing Long dwell time Short dwell times Penetrant drying within faults

65. What is purpose of maintaining certification records and the written practice?

For periodic approval by ASNT. To determine the effectiveness of outside services. To provide documentation for review by customer, clients, and regulatory agencies. To protect against product liability claims. All of the above.

66. When flux leakage inspecting the test piece should be demagnetised?

Well below saturation At saturation Near saturation Beyond saturation

67. Of the following personnel, who can administer the near distance visual acuity examination?

A NDT Level III. A physician, licensed nurse An ophthalmologist or optometrist A personnel approved by the employer’s Level III Any of the above

68. The common term used to denote the 'light amplification by stimulated emission of radiation' is

laser cathode ray tube photon gun pptical microscope

69. Flow detection is best achieved when the magnetic flux is?

Parallel to the flaw major dimension At 30 degrees to the flaw major dimension At 90 degrees to the flaw major dimension At 60 degrees to the flaw major detection

70. In which of the following forms are temperature indicatiing materials available?

Pellets Crayon stick Organic liquids All of the above

71. The most common optical instrument is

borescope optical lens eye microscope

72. Which of the following is a contact temperature sensor?

Radiometer Thermocouple Thermal wave inferometer

73. Increasing the detector probe speed over the area being examined will result in

an increase in test sensitivity a decrease in test sensitivity a decrease in response time a decrease in instrument sensitivity

74. Sheets of metal before it is rolled into pipe using a welding bell is called?

Strip stock Skelp Pipe stock Tube stock

75. The energy of thermal neutrons, commonly used for NR, is

above 0.1 MeV 10 keV − 100 keV 1 keV − 10 keV less than 0.1 MeV 0.01 eV − 0.3 eV

76. Reshaping of a material while in a plastic or semi-solid form is called

casting rolling extrusion all of the above both B and C

77. Which of the following may be performed to help prevent corrosion?

Electroplating. Cathodic protection. Anodizing. All of the above.

78. Electro plated surfaces are ususally quite thin. Which common NDT methd is used to measure the plate thickness?

MT UT ET PT

79. The general term for a local variation in material continuity is called

a discontinuity a defect an indication a crack

80. Improved properties can be achieved by

cold rolling hot rolling extrusion all of the above

81. In flexible boroscope the image remains round and sharp until the tube is bent up to an angle of

30º 45º 60º 90º

82. What is the optimal temperature of penetrant materials and the part under inspection in order to obtain the best results?

10 − 27 oC ( 50 − 80 oF) 10 − 49 oC ( 50 − 120 oF) 16 − 38 ºC (60 − 100 ºF) 27 − 49 oC ( 80 − 120 oF)

83. To avoid quench cracks during heat treatment of steel, one should use:

annealing. normalizing precipitation hardening. martempering.

84. Using a black light lamp with a cracked filter or without the filter in place can cause damage to human eyes because the lamp emits:

black light ultraviolet light infrared light violet light

85. Most of the gamma radiography is performed with

natural isotopes radium X-ray machine artificial isotopes

86. The developer is a solution of what?

Acetone Acid Alkaline Water

87. Which of the following test frequencies would produce eddy currents with the largest depth of penetration?

100 Hz 10 kHz 1 MHz 10 MHz

88. Highest quality of steel is produced in: A an electric furnace.

an open-hearth furnace. a bessermer furnace a basic oxygen furnace.

89. A quart crystal cut so that its major faces are parallel to the Z and Y axes and perpendicular to the X axis is called:

a Y-cut crystal an X-cut crystal a Z-cut crystal a ZX-cut crystal

90. PT can be used to test most materials provided the surface of the part is:

having a temperature above 35 oC smooth is not extremely porous or rough cleaned with acid

91. Shrinkage within a casting can occur in which of the following states?

Liquid state Solidification Solid state All of the above

92. In the machining process metal is removed in the form of

swarf chips fillings turnings

93. Austenitic stainless steel is:

low alloy steel. high alloy steel. non-magnetic. both B and C

94. Which of the following is not a fabrication method of metals?

Casting Forging Heat treatment Welding

95. What is the typical frequency operating range for acoustic emission equipment?

1-5 MHz 20-1200 KHz 200-1800 KHz 20-1200KHz

96. Material properties such as specific heat, density, thermal conductivity, thermal diffisivity and temperature will affect?

Conduction Convection Radiation Conduction and convection

97. The mechanism which pulls a penetrant into a discontinuity is defined as?

Capillary action Good surface tension Low rentitivity Good wettability

98. The physical hole is represented by the word

leak leakage leakage rate any of the above

99. In the casting process what name is given to the part which is used to represent the finished item?

The mould The spruce The pattern The shell

100. Creep of the metal refers to

plastic deformation elastic deformation elastic plus plastic deformation. none of the above

101. If a material is loaded until its elastic limit is exceeded, what condition will occur?

The material may fracture The material may be work hardened The material will show no harmful effects both A and B

102. Fibre optic systems work on which of the following principles?

Refelction Diffraction Refraction Reticulation

103. In electric arc welding, a metal rod is one electrode, the other is

the work material the rod flux the earth all the above

104. A particular material has an Ultimate Tensile Strength (UTS) of 45000 psi and an yield strength of 30000 psi. An allowable design stress is l5000 psi. What is the factor of safety based on UTS?

1.5 l5 3.0 None of the above

105. The general gas law showing the relationship of pressure, temperature and volume of an ideal gas is expressed by which one of the following relationships?

PT/V = Constant or P1 T1 = P2 T2 (when V1 = V2 ) TV/V = nR or T1V1 = T2V2 (when P1 = P2 ) PV = nRT or P1T2= P2T1 (when V1 = V2 ) PV=nR or P1V1=P2V1 (when T1 = T2 )

106. The bonding process giving very high efficiency is

fusion bonding pressure bonding flow bonding atomic bonding

107. Which of the following furnaces is not used to produce steel?

Blast furnace Bessemer converter Basic oxygen furnace Open hearth furnace

108. A non-destructive test is usually classified as a

indirect test destructive test direct test both A and B

109. The light from common sources, particularly light from incandescent lamps, is often compared with light from a theoretical source. This theoretical source is called a:

gray body. black body. white body. spectro photometer.

110. Which of the following is classed as a physical property?

Density Conductivity Melting point All of the above

111. The emulsification time is calculated by which of the following methods?

Using half of the dwell time Using a quarter of the dwell time Trial and error Emulsification should always be for two minutes

112. Hardness tests can be used to determine material

hardness composition heat treated condition all of the above

113. Which of the following is a problem with respect of using radioactive sources to produce thermal neutrons?

Portability Fine grained film must be used Long exposure times and the use of coarse grained film No contrast on low atomic number materials

114. Which welding process is generally used to weld the ends of heavy round bars or tubes?

Ultrasonic welding Electroslag welding Plasma arc welding Friction welding

115. What is required to form a fusion bond?

Melting of parent metals A filler rod Pressure All of the above

116. Which level of penetrant is the most sensitive?

Level Level Level Level

117. Which of the following is the general procedure followed when demagnetising an article?

Reverse the field whilst reducing the magnetising force Reverse the field whilst increasing the current Keep the field constant whilst reducing the current Keep the field constant whilst increasing the current

118. Exposure to high frequency visible light at high intensities and long durations that may damage the retina, and does not elevate retinal temperatures enough to cause thermal hazard is called:

blue hazard. hyper thermia thermal shock hypo thermia

119. A surface defect produces an indication which is?

Sharp and distinct Wide and indefinite Usually nonrelevant Usually transverse

120. Which type of probe can be described as containing an acoustical barrier seperating the transmitter element from the receiver?

Twin crystal Damped wide bandwidth Damped narrow bandwidth Damped low resolution

121. As the elevation above sea level increases, the barometric pressure:

remains the same decrease increases none of the above

122. High latitude will have a?

High contrast Low contrast Low definition High definition

123. To what wavelength of radiation is the human eye most sensitive?

nM 5750 Angstroms 4200 Angstroms 400 nM

124. When inspecting coarse-grained material, which of the following frequencies will generate a sound wave that will be most easily scattered by the grain structure?

0.5 MHz 2.25 MHz 13 MHz 10 MHz

125. The process in which moulds are made by dipping wax patterns in ceramic slurries and then firing them is popularly known as:

centrifugal casting. shell moulding. investment casting gravity die casting.

126. Commonly operated frequency range of AE sensors is

1 kHz to 20 kHz 30 kHz to 2 MHz 3 MHz to 20 MHz above 20 MHz

127. A good penetrant requires a surface tension which is?

High Low Fast Slow

128. Radiometers should be calibrated every _____ months.

2 4 6 12

129. Which of the following is a Notched Bar test?

Tensile impact test Charphy test Izod test both B and C All of the above

130. Steel has a carbon content of less than

4% 3% 2% 1%

131. Another name for investment casting is

lost wax process centrifugal casting permanent mould casting none of the above

132. What parameter can directly affect the sensitivity of any vacuum box bubble test?

Slight residual magnetism in test specimen. Amount of pressure differential created with the box. Ambient air dew point temperature is more that 25 ºF. all of the above

133. Shrinkage occurring in the casting process can be divided into how many stages?

1 2 3 4

134. The selection of the test method is primarily determined by the ??? of the test article?

Hardness Configuration Conductivity Strength

135. In contact testing, the entry surface indication is sometimes referred to as:

the initial pulse the main bang both A and B short pulse

136. Splashed metal entrapped by molten metal that does not re-fuse is called

hot tear chill inclusion cold shut

137. Small metal supports which become part of the casting during pouring are called

chills chaplets cores risers

138. Which of the following have approximately square cross sections?

Slab Bloom Billet All of the above both B and C

139. Which of the following is a method of applying dry powder developer?

Electrostatic spray Dipping Dust storm cabinet All of the above methods of application

140. Which of the following alloying additions are used to produce tool and die steels?

Nickel Chromium Manganese All of the above Both B and C

141. In lieu of air, which one of the following gases would be the best choice as the pressurizing medium for a pressure change measurement test?

Nitrogen Hydrogen Carbon monoxide Oxygen

142. Which of the following human cell categories is the most sensitive to radiation exposure?

Granulocytes Basal cells Bile duct cells Muscle cells Lymphocytes

143. In VA displacement measurements can be dependent on

temperature speed pressure load all of the above

144. In vibration analysis (VA) the damping factor or damping ratio (z) is

the ratio of actual damping to critical damping. the ratio of final damping to initial damping. the ratio of final damping to critical damping. none of the above

145. An NDT Level II individual should be

thoroughly familiar with the scope and limitations of the methods for which qualified. able to organize and report the results of NDT inspections. qualified to set up and calibrate equipment and to interpret and evaluate results with respect to applicable codes, standards, and specifications. all of the above.

146. Industry and military specifications control a _____ of the penetrant.

density flash point corrosiveness all of the above

147. Which of the following is a classification of stainless steel?

Austenitic Ferritic Martensitic All of the above Both A and B

148. The response of thermal detector is

dependent on wavelength independent with wavelength. dependent on energy none of the above.

149. The focusing cup is part of which of the following?

Anode Target Cathode Filament

150. The passage of a gas by diffusion through a solid material where there is no physical leak in the sense of an opening or defect, is called:

permeation adsorption absorption capillary action

151. Mill work covers many products. Which below would be classed as a mill product?

Pipe Tube Casting Pipe and tube None of the above

152. When steel has been quench-hardened and is reheated to some point below the lower transformation temperature for the purpose, of reducing brittleness, this is called: