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UT Level 2 > L1:P5 > Flashcards

L1:P5 Flashcards

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1
Q

1)

Ultrasonic waves that travel along the surface of a material and whose particle motion is elliptical are called?

A. Shear Waves
B. Transverse Waves
C. Longitudinal Waves
D. Rayleigh Waves

A

D. Rayleigh Waves

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2
Q

2)

When the incident angle is between the first and second critical angles, the ultrasonic wave mode within the test piece will be a:

a. Longitudinal Wave
b. Shear Wave
c. Surface Wave
d. Lamb Wave

A

b. Shear Wave

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3
Q

3)

The formula used to calculate the angle of refraction within a material is called:

a. Fresnels law
b. Faunhofers law
c. Snells law
d. Lambs law

A

c. Snells law

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4
Q

4)

In a material with a given velocity, when frequency is increased, the wavelength will:

a. not be affected
b. increase
c. decrease
d. double

A

c. decrease

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5
Q

5)

What is the most common type of data display used for the manual ultrasonic examination of welds:

a. A-scan display
b. B-scan display
c. C-scan display
d. D-scan display

A

a. A-scan display

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6
Q

6)

Which is the plot of signal amplitude versus time:

a. A-scan display
b. B-scan display
c. C-scan display
d. None of the above

A

a. A-scan display

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7
Q

7)

Calculate the wavelength when using a 5 MHz probe on a material with a velocity of 3000 m/s:

a. 1.2mm
b. 0.6mm
c. 1.7mm
d. 0.4mm

A

b. 0.6mm

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8
Q

8)

What is the material called that is placed between the probe and the test piece to help transit from one to the other?

a. a couplant
b. an interface
c. an absorber
d. a refractor

A

a. a couplant

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9
Q

**9)

A plan view display is called:

a. a C-Scan display
b. an A-scan display
c. an X-axis plot
d. a strip chart recording

A

a. a C-Scan display

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10
Q

10)

Ultrasonic data which is displayed in a form representative of the cross section of the test specimen is called:

a. an A-scan presentation
b. a B-scan presentation
c. a C-scan presentation
d. an X-Y plot

A

b. a B-scan presentation

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11
Q

11)

Data presentation most likely to be used with automatic immersion scanning systems is:

a. an A-scan presentation
b. a B-scan presentation
c. a C-scan presentation
d. A D-scan presentation

A

c. a C-scan presentation

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12
Q

12)

In an immersion system, what spans the width of the immersion tank?

a. an articulator
b. a bridge
c. a manipulator
d. a search tube

A

b. a bridge

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13
Q

13)

On an ultrasonic immersion system what is used to adjust transducer angle:

a. a carriage
b. a manipulator
c. a search tube
d. an index system

A

b. a manipulator

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14
Q

14)

Rough entry surfaces can result in:

a. a loss of echo amplitude from discontinuities
b. an increase in the width of the front surface echo
c. both a. and b.
d. none of the above

A

c. both a. and b.

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15
Q

15)

As the grain size increases, the main effect in ultrasonic testing is on the:

a. velocity of sound
b. attenuation
c. acoustic impedance
d. angle of refraction

A

b. attenuation

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16
Q

16)

Only longitudinal waves can occur in:

a. machine oil
b. aluminium
c. ice
d. beryllium

A

a. machine oil

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17
Q

17)

If the velocity of a wave is 6.25mm/s at 13mm below the surface, what is the velocity at 51mm below the surface:

a. 1/4 the velocity at 13 mm
b. 1/2 the velocity at 13 mm
c. the same as the velocity at 13 mm
d. none of the above

A

c. the same as the velocity at 13 mm

18
Q

18)

What can cause non relevant indications on screen?

a. drilled holes
b. edge effects
c. surface conditions
d. all of the above

A

d. all of the above

19
Q

19)

A common method for the estimation of defect size is the use of a:

a. double transducer test
b. piezoelectric standard
c. mode conversion
d. reference reflector

A

d. reference reflector

20
Q

20)

Another name for Fresnel Zone is:

a. transition zone
b. near field
c. far afield
d. dead zone

A

b. near field

21
Q

21)

Attenuation is a:

a. display characteristic
b. Material parameter
c. transducer characteristic
d. all of the above

A

b. Material parameter

22
Q

22)

What must be done to find discontinuities that are oriented at an angle to the entry surface:

a. change the frequency
b. grind the surface
c. use angle probes
d. increase the gain

A

c. use angle probes

23
Q

23)

an A-scan display which shows a signal both above and below the sweep line is called:

a. a 1/2 wave reflected display
b. un-rectified display
c. full wave rectified display
d. a fequency modulated display

A

b. un-rectified display

24
Q

24)

Surface (Rayleigh) waves travelling on the top surface of a block:

a. are not reflected from a sharp edge corner
b. are reflected from a sharp edge corner
c. travel through the sharp edge corner and are reflected from the lower edge
d. are absorbed by a sharp edge corner

A

b. are reflected from a sharp edge corner

25
Q

25)

The piezoelectric material in the probe:

a. converts electrical energy to mechanical enegery
b. converts mechanical energy to electrical energy
c. both a + b
d. neither a nor b

A

c. both a + b

26
Q

26)

The velocity of sound in a material is dependant upon the:

a. frequency
b. wavelength
c. type of material
d. pulse length

A

c. type of material

27
Q

27)

To change the wavelength of sound in a test part you would change the:

a. sound wave frequency
b. diameter of the transducer
c. electrical pulse voltage
d. pulse repetition rate

A

a. sound wave frequency

28
Q

28)

Ultrasonic waves are commonly used to:

a. test materials for discontinuities
b. test materials for thickness
c. test materials for grain size
d. all of the above

A

d. all of the above

29
Q

29)

Which of the following has the longest near zone:

a. 13 mm diameter 1 MHz
b. 13 mm diameter 2.25MHz
c. 28.5 mm diameter 1MHz
d. 38 mm diameter 2 MHz

A

d. 38 mm diameter 2 MHz

30
Q

30)

Which of the following is/are advantages of immersion testing:

a. inspection speed increased
b. ability to control and direct sound beams
c. adaptability for automated scanning
d. all of the above

A

d. all of the above

31
Q

31)

As frequency increases, the wavelength will:

a. decrease (be shorter)
b. increase (be longer)
c. remain the same but velocity will increase
d. remain the same but velocity will decrease

A

a. decrease (be shorter)

32
Q

32)

the product of the material density and the velocity of sound within that material is known as its:

a. acoustic impedance
b. near field
c. acoustic attenuation
d. ultrasonic beam distribution
e. vibrational index

A

a. acoustic impedance

33
Q

33)

For a given incident angle, if the frequency of the transducer increases, the refracted angle will:

a. increase
b. decrease
c. stay the same
d. cannot be determinned

A

c. stay the same

34
Q

34)

Both longitudinal and shear waves may occur in a second medium when the angle of incidence is:

a. below the first critical angle
b. between the first and second critical angles
c. padt the second critical angle
d. only at the second critical angle

A

a. below the first critical angle

35
Q

35)

Which of the following frequencies would provide the greater depth of penetration:

a. 1 MHz
b. 2.25 MHz
c. 5 MHz
d. 10 MHz

A

a. 1 MHz

36
Q

36)

Which of the following materials is considered the most efficient receiver of ultrasonic energy:

a. quarts
b. ceramic
c. barium titanate
d. lithium sulphate

A

d. lithium sulphate

37
Q

37)

The loss of energy through a material is the result of beam:
a. interference
b. attenuation
c. absorption
d. reflection

A

b. attenuation

38
Q

38)

Which of the following characteristics would not affect the selection of a couplant:

a. mode of propagation desired
b. material surface finish and temperature
c. operating frequency of the transducer
d. chemical properties of the couplant

A

c. operating frequency of the transducer

39
Q

39)

The change in direction of an ultrasonic beam when it passes from one material to another is called;

a. refraction
b. diffraction
c. angulation
d. reflection

A

a. refraction

40
Q

40)

A device that transforms electrical pulses into mechanical and vice versa is:

a. attenuator
b. a piezoelectrical material
c. a mode of converter
d. none of the above

A

b. a piezoelectrical material

UT Level 2 (16 decks)

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