Top 150+ Solved Ultrasonic Testing Level 1 MCQ Questions Answer
Q. AA term used in ultrasonics to express the rate at which sound waves pass throughvarious substances is:
a. Frequency
b. Velocity
c. Wave length
d. Pulse length
Q. Transducer focal lengths are normally specified as:
a. Distance in steel
b. Distance in aluminium
c. Distance in air
d. Distance in water
Q. The second critical angle is defined as the longitudinal wave incident angle whichresults in:
a. A refracted longitudinal wave of ninety degrees
b. A refracted shear wave of ninety degrees
c. Complete reflection of the sound beam
d. None of the above
Q. Spurious or nonrelevant indications might be suspected if:
a. Indications are unusually consistent in amplitude and appearance
b. There are strong indications in localised areas
c. The indications are localised and repeatable
d. None of the above
Q. A A disadvantage of lithium sulfate as a transducer material is that:
a. It is an inefficient receiver of ultrasonic energy
b. It is soluble in water
c. It is not piezo- electric
d. It has extremely coarse grain structure
Q. An advantage of using a ceramic transducer in search units is 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 has a very low mechanical impedance
d. It can withstand temperatures as high as 700oC
Q. The three most common modes of sound vibration are:
a. Longitudinal, compressional, and transverse waves
b. Longitudinal, transverse and rayleigh waves
c. Transverse, longitudinal and shear waves
d. Transverse, shear waves and rayleigh waves
Q. A A larger diameter crystal results in:
a. Greater beam spread
b. Lower penetrating power
c. Less beam spread
d. Greater penetrating power
Q. Entry surface resolution is a characteristic of an ultrasonic testing system whichdefines its ability to:
a. Detect discontinuities oriented in a direction parallel to the ultrasonic beam
b. Detect discontinuities located in the center of a forging containing a fine metallurgical structure
c. Detect minute surface scratches
d. Detect discontinuities located just beneath the entry surface in the part being tested
Q. Higher frequency transducers produce which of the following?
a. Greater beam spread, sensitivity and resolution
b. Greater sensitivity, resolution and penetration
c. Greater penetration, attenuation and resolution
d. Greater sensitivity, resolution and attenuation
Q. In immersion testing, verification that the search unit is normal to a flat entry surfaceis indicated by:
a. Maximum reflection from the entry surface
b. Proper wavelength
c. Maximum amplitude of the initial pulse
d. Elimination of water multiples
Q. Most commercial ultrasonic testing is accomplished using frequencies between:
a. 1 and 25 kHz
b. 0.2 and 25 MHz
c. 1 and 1 000 kHz
d. 15 and 100 MHz
Q. The longitudinal wave incident angle which results in formation of a rayleigh wave iscalled:
a. Normal incidence
b. The first critical angle
c. The second critical angle
d. Any angle above the first critical angle
Q. An ultrasonic testing technique in which the transducer element is not parallel to thetest surface is called:
a. Angle beam testing
b. Immersion testing
c. Contact testing
d. Through-transmission testing
Q. In the same material, shear wave velocity is:
a. Approximately 1/2 longitudinal wave velocity
b. Approximately twice longitudinal wave velocity
c. Approximately 1/4 longitudinal wave velocity
d. Approximately four times longitudinal wave velocity