Physics Group - I (3110011) MCQs

MCQs of Ultrasonic and Non distractive testing (NDT)

Showing 1 to 10 out of 38 Questions
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1.
Ultrasound are waves having
(a) high frequency
(b) high energy
(c) inaudibility to human ear
(d) all of these
Answer:

Option (d)

2.
Ultrasonic waves can be classified into
(a) Longitudinal waves
(b) Transverse or Shear waves
(c) Surface or Rayleigh waves
(d) all of these
Answer:

Option (d)

3.
The frequency of ultrasonic waves is
(a) 20 kHz
(b) more than 20 kHz
(c) more than 20000 Å
(d) more than 20000 m
Answer:

Option (b)

4.
Ultrasonic waves have property
(a) the frequency of infrasonic wave is greater than 20 kHz
(b) its velocity is changing for a homogeneous medium
(c) it travels a longer distance in the medium without any loss
(d) all of these
Answer:

Option (c)

5.
Ultrasonics are used for higher resolution in flaw (damage or crack) detection because of
(a) longer wavelength
(b) less speed of travel in denser medium
(c) all of these
(d) shorter wavelength
Answer:

Option (d)

6.
Velocity of ultrasonic waves is constant for a __________ medium.
(a) mixture of only two
(b) insufficient information
(c) homogeneous
(d) heterogeneous
Answer:

Option (c)

7.
Ultrasonic waves undergo reflection and refraction at the interface, due to the change in __________ and __________ properties of the medium
(a) elastic, physical
(b) plastic, elastic
(c) homogeneity, physical
(d) all of these
Answer:

Option (a)

8.
Ultrasonic waves travel as a well-defined sonic beam
(a) True
(b) False
(c) True but as sonic boom
(d) True but as sonic ray
Answer:

Option (a)

9.
Ultrasonic waves are produced by using
(a) Mechanical generator
(b) Magnetostriction generator
(c) Piezoelectric generator
(d) all of these
Answer:

Option (d)

10.
Magnetostriction generator uses __________ as a medium to produce vibrations.
(a) Quartz crystal
(b) Ferromagnetic rod
(c) Ferroelectric rod
(d) Tourmaline rod
Answer:

Option (b)

Showing 1 to 10 out of 38 Questions
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