QUIZ) ASNT L3 BASIC 13

241. Which of the following is an advantage of fluorescent penetrants over visible dye penetrants?

a. the inspection can be carryed out in a well-lighted area

b. small indications are more easily seen

c. can be used where contact with water is objectionable

d. less sensitive to contamination of discontinuities

242. Reference standards used for eddy current testing

a. must contain artificial discontinuities such as notches and drilled holes

b. must contain natural discontinuities such as cracks and inclusions

c. must be free of measurable discontinuities

d. may contain artificial or natural discontinuities or may be free of discontinuities depending on the test system

and the type of testing being conducted

243. In metal assemblies cracks emanating from fastener holes are

a. usually easy to detect nondestructively

b. of minor consequence because they seldom show

c. difficult to detect nondestructively and usually require removal of the fastener

d. only present in structures which are subject to high static loads

244. The shielding required to reduce the intensity of a 20 curie cobalt source to 275mR/h at 1 meter would be

approximately

a. 6 inches (15.2cm) of concrete

b. 3¼ inches (8.3cm) of lead

c. 7 inches (17.8cm) of steel

d. 24inches (61cm) of steel

245. A person is 30 years old According to the banking concept this person may-have an accumulated dosage of

a. 65rem b. 60rem c. 270rem d. 260rem

246. What is the geometric unsharpness of the image of an object 1 inch from the source side surface of a 3 inch

(7.6cm) thick test object when radiographed with a 0.315inch (0.8cm) focal spot at 24 inches(61cm) focal spot

to film distance?

a. 0.002inch(0.05mm) b. 0.029inch(0.7mm)

c. 0.114inch(2.8mm) d. 0.075inch(1.9mm)

247. What hazard is involved with the use of prods to examine a finished part?

a. the part may be too large in either length or width to permit a proper examination

b. the part may be magnetically saturated

c. the magnetic field may be applied in the wrong directions

d. the part may receive arc burns

248. Generation of ultrasonic energy for shear wave testing can best be accomplished by

a. a transverse length expansion crystal

b. engulation of the crystal past the first critical angle

c. a transverse length expansion crystal

d. a crystal with a thickness-shear type of deformation

249. Wet penetrant developer concentration is typically checked by a

a. sensitivity test

b. hydrometer test

c. settling test

d. visual test

250. the type of penetrant emulsifier which is primarly a surface-active agent or detergent is called a

a. hydrophilic emulsifier

b. aurophilic emulsifier

c. lipophilic emulsifier

d. ureaphilic emulsifier

251. Which of the following materials is used as a solvent to determine the amount of water contaminating the

emulsifier when using an open tank liquid penetrant system?

a. ixylene b. acetone c. methylethyl ketone d. kerosene

252. The property of liquid penetrant test materials which results from molecular or internal friction is

a. emulsifiability

b. volatility

c. viscosity

d. solubility

253. Liquid penetrant test materials to be applied with electrostatic spray equipment must have

a. high electrical resistivity

b. very low viscosity

c. good electrical conductivity

d. a low flash point

254. In neutron radiography boron can be readily discriminated from carbon because of differences

a. in x-ray mass absorption coefficients

b. in neutron mass absorption coefficients

c. in atomic number

d. in density

255. Direct exposure converter screens of Gd can be reused

a. only after 2-4 hours from the last exposure

b. only within 2-4 hours following the last exposure

c. essentially just following the last exposure

d. only after determining when the residual radioactivity has diminished to a safe level for handling

256. Which of the following properties would not affect the periomance of a bubble solution?

a. viscosity

b. surface tension

c. contrast

257. Under normal shop or field conditions at a differential pressure of one atmosphere a solution film enables

detection of leakage as small as

a. 10(-6) to 10(-7) atm-cc/sec

b. 10(-5) to 10(- 6) atm-cc/sec

c. 10(-4) to 10(-5) atm-cc/sec

d. 10(-2) to 10(-3) atm-cc/sec

258. Which of the following is not true regarding the halogen sniffer test method?

a. can be a very sensitive test method

b. detected leaks can usually be pinpointed

c. total leakage rate of a component or vessel is accurately known on completion of a halogen sniffer test

d. can be performed on most vessels or components which are capable of withstanding internal pressure

259. Refrigerant 12 in the presence of high temperarures (such as weld puddle) will break down into hydrogen

chloride hydrogen fluoride chlorine and

a. carbon monoxide

b. sulfur dioxide

c. phosgene

d. sodium sulfate

260. A permanent magnet is a material whose magnetic domains are

a. held in fixed positions with directions that cancel out

b. in fixed positions with a preponderance of the magnetic domains aligned in one direction

c. in random positions that easily align themselves to attract a magnetic material

d. of reversing polarity with each reversal of applied current

 

 

 

 

 

 

ANSWER

 

241	242	243	244	245	246	247	248	249	250
B	D	C	B	B	B	D	B	B	A
251	252	253	254	255	256	257	258	259	260
A	C	A	B	C	C	D	C	C	B