Top 150+ Solved Ultrasonic Testing Level 1 MCQ Questions Answer
Q. Typical ultrasonic testing frequencies are:
a. 50 kHz to 1 MHz
b. 200 kHz to 25 MHz
c. 10 MHz to 100 MHz
d. 1 MHz to 5 MHz
Q. A disadvantage of using a high frequency ultrasonic transducer is:
a. It provides a smaller beam angle and better resolving power
b. It provides a larger beam angle and poorer resolving power
c. It is scattered more by coarse grained material
d. It is scattered less by coarse grained material
Q. Which of the following circuits provides timing signals to the pulser?
a. The clock
b. The amplifier
c. The pulse generator
d. The sweep generator
Q. Which of the following search units would contain the thinnest quartz crystal?
a. A 1 MHz search unit
b. A 5 MHz search unit
c. A 15 MHz search unit
d. A 25 MHz search unit
Q. With longitudinal wave incident at angles between the first and second critical angles:
a. The sound beam is totally reflected
b. Only shear waves are produced in the second material
c. Shear waves and longitudinal waves are produced in the second material
d. Only longitudinal waves are produced in the second material
Q. Sound velocity is described by which of the following relationships?
a. Wavelength times frequency
b. Wavelength divided by frequency
c. Wavelength divided acoustic impedance
d. Acoustic impedance divided by density
Q. The relationship between the longitudinal wave incident angle and the refracted shearwave angle is defined by:
a. Snell's law
b. Snell's constant
c. The law of acoustics
d. Fraunhofer’s law
Q. Acoustic impedance is defined by which of the following relations?
a. Material density/wavelength
b. Material density × velocity
c. Velocity/wavelength
d. Velocity × wavelength
Q. The upper limit of human hearing is normally considered to be about:
a. 12 kHz
b. 16 kHz
c. 20 kHz
d. 30 kHz
Q. Reference standards containing a series of flat bottom holes of the same diameter atdifferent depths in each block are called?
a. Area-amplitude blocks
b. Distance-amplitude blocks
c. IIW blocks
d. Sizing blocks
Q. During ultrasonic testing by the immersion method, it is frequently necessary to angulate the search unit when a discontinuity is located at an angle in order to:
a. Avoid a large number of back reflections that could interfere with a normal test pattern
b. Obtain a maximum response if the discontinuity is not originally oriented perpendicular to the ultrasonic beam
c. Obtain a discontinuity indication of the same height as the indication from the flat bottomed hole in a reference block
d. Obtain the maximum number of entry surface reflections
Q. Which of the following transducer materials is the most efficient receiver of ultrasonic energy?
a. Lead metaniobate
b. Quartz
c. Lithium sulphate
d. Barium titanate
Q. An ultrasonic wave in which particle displacement is 90 degrees to the direction ofwave propagation is called a:
a. Longitudinal wave
b. Shear wave
c. Compressional wave
d. Plate wave
Q. An advantage of using lithium sulphate in search units it that:
a. It is one of the most efficient generators of ultrasonic energy
b. It is one of the most efficient receivers of ultrasonic energy
c. It is insoluble
d. It can withstand temperatures as high as 700ºC