QUIZ) ASNT L3 BASIC 10

181. lamella tearing in a steel weldment

a. can only occur if laminations are present

b. can only occur in the presence of hydrogen and martensite formation in the beat affected zone

c. are cracks in the base metal due to high tensile stresses in the through-thickness direction of the plate

d. occur as crater cracks in the weld bead

182. If there is insufficient weld metal to fill the weld joint the discontinuity is referred to as

a. overlap b. undercut c. underfill d. melt-thru

183. What element is unwanted in steel because it causes hot short cracking?

a. sulfur b. carbon c. manganese d. nickel

184. Which of these methods is used to reduce residual stress created by welding?

a. prebending b. shot blasting

c. quenching rapidly after welding d. post-weld annealing

185. The principal reason for preheating and interpass heating is to

a. assist in melting the electrode

b. decelerate the cooling rate in the deposited weld metal and heat affected zone

c. accelerrate the cooling rate in the deposited weld metal and heat affected zone

d. relieve distortion that may have occurred during fit-up

186. Which of the following statements define the curie temperature?

a. heat treating temperature in aging or curing plastics

b. temperature that cures temper embrittlement

c. radioactivity temperature discovered by madame curie

d. temperature above which a magnetic material becomes nonmagnetic

187. What energy source is used for brazing?

a. diffusion b. electrical induction c. dipping d. fluxes

188. A joining process that permits bonding of nonmetals to metals is

a. adhesive bonding b. electrogas welding

c. flash welding d. pressure gas welding

189. A qualitative description of the sustained signal level produced by rapidly occurring acoustic emission events

is the accepted definition for

a. burst emission b. acoustic emission signature

c. acoustic emission signal d. continuous emission

190. Attenuation of a wave is best defined by which statement?

a. a decrease in frequency with distance traveled

b. a decrease in amplitude with distance traveled

c. a decrease in wave seed with distance traveled

d. a change in direction as a function of time

191. The number of times the acoustic emission signal exceeds a preset threshold during any selected portion of

a test is called the

a. acoustic emission response b. acoustic emission count

c. acoustic emission count rate d. acoustic emission energy

192. Flux leakage inspection can normally be applied to

a. ferromagnetic and nonmagnetic material

b. non-magnetic materials only

c. ferromagnetic materials only

d. non-conductors only

193. The ratio B/H is euqivalent to materials

a. field strength b. reluctance c. permittivity d. permeability

194. What particular type of defect if not indicated flux leakage techniques?

a. overlap b. grain-boundary crack

c. slag inclusion with crack d. surface contamination

195. Which of the following describes the disadvantage of direct testing?

a. it is usually time-consuming

b. it has statistical significance

c. the assumption must be made that those materials not tested are like the ones for which test information has

been obtained

d. it requires expert evaluation of the evidence that is gathered

196. Which of the following is generally important property advantage of nonferrous metals over steel and cast

iron?

a. tensile strength b. hardness c. corrosion resistance d. castability

197. Results of NDT for internal defects in massive casting may difficult to analyze because of effects from

a. fine equiaxed grains b. variable grain size

c. bolid contraction d. relatively low strength

198. Since the production of seamless tubing can cause tears and other-crack-like defects and irregular in size

and wall thickness thich of the following NDT technique is frequently applied?

a. eddy current testing b. fluoroscopic technique

c. ultrasonic testing d. acoustic emission testing

199. Versatile low cost but low quantity production process for cylindrical drawn shapes is

a. piercing b. shearing c. perforating d. spinning

200. A process in which metal wire or powder is fed into an oxyacetylene heating flame and after melting, is

carried by high velocity air to be impinged against the work surface. What is this process?

a. electroplating b. metallizing

c. flame hardening d. carburizing

 

 

 

 

 

ANSWER

181	182	183	184	185	186	187	188	189	190
C	C	A	D	B	D	A	A	D	B
191	192	193	194	195	196	197	198	199	200
B	C	D	D	C	C	B	A	D	B