QUIZ) ASNT L3 UT 7

121. An application appropriate for wall thichness measurement near surface

A. focused angle probe

B. standard single crystal probe

C. TR probes

D. high frequency vertical probe

122. Inspection of oil rings is prescribed in codes written by

A. AWS B. ASTM C. ASME D. Nuclear Regulatory Committee

123. A circular disk flay much smaller than the wave length

A. is likely to miss detection

B. will reflect a spherical wave with pressure proportional to double the power of the flaw diameter

C. will reflect a spherical wave with pressure proportional to the third power of the flaw diameter and

inversely proportional to the wave length

D. will reflect a spherical wave with pressure equal to the third power of flaw diameter

124. Which NDT methods is best used to inspect to the inside diameter of thin wall tube?

A. UT B. MT C. ECT D. PT

125. When testing metal to rubber bond line from the metal side a strong indication for the metal

thickness wouid indicate

A. a good bond

B. discontinuities in the metal

C. discontinuities in the rubber

D. lack of bond

126. Which of the following is a factor in determining proper testing angle

A. Attenuation

B. Thickness of the part

C. Resolution

D. Sensitivity

127. In testing ceramic materials using frequencies as high as 50Mhz the critical discontinuity size that

can be defected is of the order of

A. 2 milimeter(mm) B. 200 microns(μm) C. 20 microns(μm) D.2 microns(μm)

128. pipe and tube are routinely UT tested by the shear wave method The sound beam should propagate

what direction?

A. circumferentially in two opposite direction

B. Axially tin two opposite direction

C. Both circumferentially and axially each in two opposite directions

D. Both circumferentially and axially each in one opposite directions

129. What will be the net effect on the ultrasonic beam when using contoured transducer shoes on the

convex surface of round bar/tubes?

A. Reduction of beam intensity at center of the sound beam

B. Signal amplitude and sensitivity increase at periphery of the sound beam

C. Reduction of beam intensity of periphery of the sound beam

D. signal amplitude and sensitivity decreases of periphery of the sound beam

130. A longitudinal ultrasonic wave is transmitted from water into steel at the angle of 9 degree from

normal in such a case the refracted angle of the transducer wave is

A. less than the refracted angle at the longitudinal wave

B. equal to the refracted angle at the longitudinal wave

C. greater than the refracted angle at the longitudinal wave

D. not present at all

131. Use of multiple transducer in UT testing results in

A. couplant efficiency improvement

B. slow down of test procedure

C. improved discontinuity indication and characterization capability

D. multiple indications being displayed

132. What are two method of coupling?

A. immersion and contact

B. immersion and spray

C. contact and spray

D. brush and dip

133. The effect of gold or silver electrode deposits on piezoelectric element?

A. help enhance the generation of ultrasonic energy

B. help reduce the voltage required to excite piezoelectric crystal vibration

C. plating variations from 25 microns(μm) on some crystal have proven to effect

D. only plating wariations greater than 25mm effect crystal performance

134. When calibrating to perform an ultrasonic test it is best to have a surface condition?

A. smoother than the test surface

B. rougher than the test surface

C. similar to the test surface

D. same temperature as the test surface

135. When performing angle beam testing for longitudinal discontinuities is a butt welded thick plate the

minimum distance over which the transducer should be manipulated to assure coverage of the weld

volume is?

A. Two full skip distance

B. One full skip distance

C. Four T, where T is thickness of the weld

D. Five T, where T is thickness of the weld

136. when standardizing an immersion system for tubular products various techniques can be used to

minimize testing inaccuracies caused by the curved entry surface. Which of the following

combinations should provide the best test?

A. A reference standard with a similarly entry surface and cylindrical focused transducer

B. A reference standard with a similarly entry surface and a flat ultrasonic transducer

C. A reference standard with a flat entry surface a unfocused transducer and curvature connection

factor calculated from the critical diameter

D. A notched reference standard and a spherically focused transducer

137. You are mapping a pressure vessel for ID corrosion with a contact straight beam techniques

indication are notched between 1/3 and 2/3 of the wall thickness. What would be the next

recommended action?

A. You would read the vessel's identification plate to make sure is was built per ASME codes

B. It is common for vessel to have identification. No further evaluation is necessary

C. The area with the indications shoul be mapped with a C-scan system and reported to the vessel owner

D. Since you did have the inspection history of the vessel you compared the finding of the least time

and decided since there was no change between the two inspection report to the owner

138. Contact ultrasonic testing of full penetrations fillet welds in T -joint using the first leg of the second beam?

A. will provide 100% volumetric inspection

B. can detect or determine the extent of penetration

C. can determine the lit up gap between welded plates

D. cannot be conducted at all

139. Which calibration block is best used for calibrating surface wave testing

A. IIW Type 1 B. IIW Type II C. DSC block D. DC block

140. An ultrasonic longitudinal wave travels in aluminum with a velocity of 635000cm/sec and has a

frequency of one megahertz. The wavelength of this ultrasonic wave is

A. 2.54cm B. 3.10cm C. 0.635mm D. 0.635cm

 

 

 

 

 

answer

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