QUIZ) ASNT L3 BASIC 7

121. to determine amperage for longitudinal magnetization of a steel bar divide the constant value(45,000) by the

a. L/D ratio of the bar

b. L/D ratio lines the number of coil turns

122. The strength of the magnetic leakage field from a discontinuity is affected by the

a. length of the discontinulty

b. size of the contact area

c. amperage used during magnetization

d. depth of the discontinuity

123. Most hydrocarbon forms area transparent to r-ray but readly absorb

a. x-ray in the range of 120 to 150 KVP

b. thermal neutrons

124. The halogen content of penetrant materials requires control for the examination of parts produces

a. titanium

b. Al

c. Cu

d. Mg

125. What change in a SMAW welding technique with decreased the weld penetration in a V-groove butt weld?

a. increase travel speed

b. decrease root face

c. decrease travel speed

d. increase wire feed speed

126. Toughness may defined briefly as the ability of a weld metal to

a. be hardened by heat treatment

b. be easily deformed

c. absorb mechanical energy

d. absorb heat energy

127. it is generally agreed that the cause of underbead cracking in steel weldments is largely due to

a. preheating the weldments prior to welding

b. use of shielding gases such as argon or helium

c. use of high heat input

d. diffusion of considerable hydrogen into the heat affected zone and transformation of austenite to martensite

128. A type of welding process that would not exhibit a heat affected zone when bonging an aluminum plate

to a steel plate is

a. electron beam welding

b. laser beam welding

c. explosion welding

d. electrogas welding

129. Which of the following is service originating defect?

a. laps

b. flakes

c. stress corrosion

d. hot tear

130. Surface type casting defects that are caused by a momentary interruption of metal flow resulting in partial

freezing and subsequently an oxide coating forms on the surface is

a. cold shut

b. shrinkage cracks

c. seams

d. tears

131. These are surface rolling defects generally long, straight and parallel to the longitudinal axis originating

from cracks or tears in the billet. What is these defects?

a. burst

b. flakes

c. laps

d. seams

132. These may occur as large voids or a thin hairline crack, generally caused by improper forging technique

and too rapid cooling. What is these defects?

a. bursts

b. oxide inclusions

c. laps

d. cold shuts

133. In the examination of tubular products where the flux sensor measures the leakage field at the outside

surface of the tube

a. outside-diameter discontinuities are detected

b. both outside-diameter and inside- diameter discontinuities may be detected

c. both outside-diameter and inside-diameter discontinuities can be detected but generally cannot be

distinguished form each other

d. both outside-diameter and inside-diameter discontinuities can be detected and generally can be distinguish

134. Two primary methods of inducing circular magnetism in a part are

a. with a coil and by placing the part between the heads

b. with a central conductor and by placing the part between the heads

c. with a central conductor and with a yoke

d. with a coil and with a yoke

135. When a round steel bar is magnetized by passing current through its length, the flux density is greatest

a. at its center

b. at the ends

c. at the surface

136. The residual magnetic particle method may be used when

a. parts are highly retentiye b. parts are aluminum

c. parts are irregular in shapre d. parts are uniform in shape

137. Magnetic particle inspection is not a reliable test for detecting

a. laps b. deep seated cavities

c. crackes d. fine surface porosity

138. The magnetic field in a coil is strongest at the

a. outside edge b. center

c. inside edge d. end

139. The most sensitive method of magnetic particle inspection of parts with low retentivity is

a. dry continuous b. dry residual

c. wet residual d. wet continuous

140. Liquid penetrant indication of a press fit are considered

a. indications of discontinuities

b. indications of defects

c. false indications

d. non-relevant indications

 

 

 

 

ANSWER

121	122	123	124	125	126	127	128	129	130
B	D	B	A	A	C	D	C	C	A
131	132	133	134	135	136	137	138	139	140
D	A	D	B	C	A	B	B	A	D