QUIZ) ASNT L3 BASIC 4

61. with which of the following is the term "rockwell" associates?

a. index of metal machinability b. tensile testing

c. strain gauges d. indentation hardness testing

62. metal fatigue is most likely to be found in structures

a. loaded under constant high stress

b. having undergone a substantial overload

c. subject to cyclic vibratory or stress reversal loads

d. loaded in constant tension

63. In arc welding the resultant weld deposit is essentially a

a. forged structure

b. cast structure

c. rolled structure

64. In which of the following might you not expect to find a seam?

a. forgings b. castings

c. bar stock d. sheet or plate material

65. metal corrosion that accelerated when the metal is under loads is called

a. electrochemical b. galvanization

c. stress corrosion d. electroplating

66. Which of the following statements best differentiates between a defect and a discontinuity?

a. defect are the same as discontinuities

b. all discontinuities are reject

c. discontinuities can propagate and become defects

d. discontinuities cannot be detected with NDT method

67. Severe grinding cracks appear as

a. wave-like patterns

b. widely spaced cracks

c. lattice-work of checkerboard pattern

d. straight lines parallel to grinding wheel rotation

68. Shrinkage in an ingot during solidification results in the formation of a central cavity known as

a. segregation b. hot top

c. blow d. pipe

69. The forging process often causes laps which sometimes can be mistaken for

a. bursts b. pipe

c. cracks d. porosity

70. Select the statement that best describes corrosion

a. corrosion wearing away

b. corrosion is a chemical process

c. corrosion always results in pitting

d. corrosion is not detrimental to visual examination

71. Surface roughness measured as the arithmetical average deviation of height and form a mid-point is call the

a. average waviness value

b. root mean square value

c. real surface deviation

d. lower aly limit

72. An ideal sampling plan should

a. assume an 85% confidence level on 90% of the parts

b. guarantee that all good lots are accepted and all bad lots are rejected

c. represent the smallest sample possible give the required quality level

d. be selected on non-random basis for 50% of the production items

73. The type of direct current typical producted by a portable prod unit is

a. three phase full wave

b. single phase half wave

c. half wave DC

d. three phase half wave

74. The absorption of gamma rays from a given source when passing through matter depends on

a. the atomic number, density, and thickness of the matter

b. the young’s modulus value of the matter

c. the poisson's ratio value of the matter

d. the specific activity value of the source

75. The fact that gases when bombarded by radiation ionize and become electrical conductors make them

useful in

a. X-ray transformers b. masks

c. X-ray tubes d. radiation detection equipment

76. Almost all gamma radiography is performed with

a. natural isotopes b. artificially produced isotopes

c. radium d. thulium-170

77. Thin sheets of lead foil intimate contact with X-ray film during exposure increase film density because

a. they fluoresce and emit visible light that helps expose the film

b. they absorb the scattered radiation

c. they prevent back-scattered radiation from hitting the film

d. they emit electrons when exposed to X-radiation and gamma-radiation that help darken the film

78. Common source of neutrons for neutron radiography are

a. electron linear acceletators

b. isotopes of cobalt(cobalt-60 is one)

c. betatrons

d. nuclear reactor

79. The reason the exposure time must be increased by a factor of four when the source-to-film distance is

double is

a. the radiation intensity will decrease at an exponential rate when the source- to-film distance is increased

b. the quality of radiation is inversely proportional to the square toot of the distance from the source to the film

c. the intensity of radiation is inversely proportional to the square of the distance from the source to the film

d. the scattered radiation effect is greater as the source-to-film distance increases

80. The filter used in front of the high pressure mercury vapor light has a peak transmission at what wavelength

of light?

a. 256nm b. 360nm c. 365nm d. 390nm

 

 

 

 

 

ANSWER

61	62	63	64	65	66	67	68	69	70
D	C	B	D	C	C	C	D	C	B
71	72	73	74	75	76	77	78	79	80
B	C	B	A	D	B	D	D	C	C