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Latest NDT Ultrasonic Testing Level 1 (UT-1) General Examination latest Questions and Answers

1.

The divergence of an ultrasonic beam is dependent on:

 
 
 
 

2.

When a longitudinal wave is an incident upon an inclined interface between zero degrees and the first critical angle:

 
 
 
 

3.

The piezoelectric material in a search unit that vibrates to produce ultrasonic waves is called:

 
 
 
 

4.

When a longitudinal wave is incident upon an inclined interface and is refracted at ninety degrees, the angle of the incident longitudinal wave is called:

 
 
 
 

5.

When a longitudinal wave sound beam passes through an acoustic interface at some angle other than zero degrees:

 
 
 
 

6.

Which of the following can be a source of spurious ultrasonic signals?

 
 
 
 

7.

A noisy baseline, or hash may result in:

 
 
 
 

8.

Sound waves which travel on the surface of a solid in a manner similar to waves on a water surface are called:

 
 
 
 

9.

Lamb waves are formed in a part which has:

 
 
 
 

10.

Which type(s) of sound wave modes will propagate through liquids?

 
 
 
 

11.

When the motion of the particles of a medium is transverse to the direction of propagation, the wave being transmitted is called a:

 
 
 
 

12.

Which of the following test frequencies would generally provide the best penetration in a 12-inch thick specimen of coarse-grained steel?

 
 
 
 

13.

An oscilloscope display in which the screen baseline is adjusted to represent the one-way distance in a test piece is called a:

 
 
 
 

14.

A common use of ultrasonic testing is:

 
 
 
 

15.

Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approximately:

 
 
 
 

16.

Y cut crystals produce:

 
 
 
 

17.

The cable that connects the ultrasonic instrument to the search unit is specially designed so that one conductor is centered inside another. The technical name for such a cable is:

 
 
 
 

18.

As ultrasonic frequency increases:

 
 
 
 

19.

In an A-scan presentation, the amplitude of vertical indications on the screen represents the:

 
 
 
 

20.

Loss of the test piece back wall echo during scanning may be caused by:

 
 
 
 

21.

When a sound beam is reflected:

 
 
 
 

22.

Which of the following circuits converts electrical energy to ultrasonic energy?

 
 
 
 

23.

An instrument display in which the horizontal baseline represents elapsed time and the vertical deflection represents signal amplitudes is called:

 
 
 
 

24.

Which of the following circuits provides short duration, high energy pulses which are used to excite the transducer?

 
 
 
 

25.

A cross-section view of a test piece is produced by which of the following?

 
 
 
 

26.

Echo amplitude losses may be caused by:

 
 
 
 

27.

Which of the following is an advantage of using a focused transducer?

 
 
 
 

28.

Which of the following circuits provide current to operate the ultrasonic instrument?

 
 
 
 

29.

Which of the following is a true statement?

 
 
 
 

30.

Which type(s) of sound wave modes will propagate through solids?

 
 
 
 

31.

The longitudinal wave incident angle at which the refracted shear wave angle equals ninety degrees is called:

 
 
 
 

32.

The amount of beam divergence from a crystal is primarily dependent on the:

 
 
 
 

33.

In ultrasonic testing, a liquid coupling medium between the crystal surface and the part surface is necessary because :

 
 
 
 

34.

X cut crystals produce:

 
 
 
 

35.

Lower frequency transducers are normally used:

 
 
 
 

36.

All other factors being equal, which of the following modes of vibration has the greatest velocity?

 
 
 
 

37.

In immersion testing, the position of the search unit is often varied to transmit sound into the test part at various angles to the front surface. Such a procedure is referred to as:

 
 
 
 

38.

The angle of a refracted shear wave generated as a sound wave passes at an angle through an acoustic interface is dependent on:

 
 
 
 

39.

Which of the following is a likely effect of a rough test piece surface?

 
 
 
 

40.

Wavelength is:

 
 
 
 

41.

The velocity of surface waves is approximately _______________ the velocity of shear waves in the same material.

 
 
 
 

42.

An ultrasonic instrument control which allows moving an A-scan display to the left or right without changing the distance between any echoes displayed is called:

 
 
 
 

43.

A disadvantage of using natural quartz crystals in a search unit is that:

 
 
 
 

44.

The formula Sin A/Sin B = VA/VB is known as:

 
 
 
 

45.

A 25 MHz search unit would most likely be used during:

 
 
 
 

46.

A technique in which two transducers are used, one on each side of the test piece, is called:

 
 
 
 

47.

Sound beam intensity is irregular in the area called:

 
 
 
 

48.

A more highly damped transducer crystal results in:

 
 
 
 

49.

The process of comparing an instrument or device with a standard is called:

 
 
 
 

50.

Scattering of an ultrasonic beam is most pronounced when:

 
 
 
 

51.

Ultrasonic testing is:

 
 
 
 

52.

Which technique would most likely be used to examine a weld, with the weld cap still in place?

 
 
 
 

53.

The maximum frequency usually used for contact testing is:

 
 
 
 

54.

Higher frequency transducers are normally used:

 
 
 
 

55.

Typical ultrasonic testing frequencies are:

 
 
 
 

56.

‘25 million cycles per second’ can also be stated as:

 
 
 
 

57.

A disadvantage of using a high-frequency ultrasonic transducer is:

 
 
 
 

58.

Which of the following circuits provides timing signals to the pulser?

 
 
 
 

59.

Which of the following search units would contain the thinnest quartz crystal?

 
 
 
 

60.

With longitudinal wave incident at angles between the first and second critical angles:

 
 
 
 

61.

Sound velocity is described by which of the following relationships?

 
 
 
 

62.

The relationship between the longitudinal wave incident angle and the refracted shear wave angle is defined by:

 
 
 
 

63.

Acoustic impedance is defined by which of the following relations?

 
 
 
 

64.

The upper limit of human hearing is normally considered to be about:

 
 
 
 

65.

Reference standards containing a series of flat bottom holes of the same diameter at different depths in each block are called?

 
 
 
 

66.

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:

 
 
 
 

67.

Which of the following transducer materials is the most efficient receiver of ultrasonic energy?

 
 
 
 

68.

An ultrasonic wave in which particle displacement is 90 degrees to the direction of wave propagation is called a:

 
 
 
 

69.

An advantage of using lithium sulfate in search units is that:

 
 
 
 

70.

Moving a search unit over a test surface either manually or automatically is referred to as:

 
 
 
 

71.

4.1.2 Ultrasonic Testing Level 1 (UT-1) Specific Examination
Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance?

 
 
 
 

72.

The ability to separate echos from reflectors close together in depth is called:

 
 
 
 

73.

Greater depth of penetration in coarse-grained material may be achieved using:

 
 
 
 

74.

Lower frequency transducers produce:

 
 
 
 

75.

Spurious indications might be caused by which of the following?

 
 
 
 

76.

The portion of a test piece which is represented by the CRT screen area from zero to the rightmost edge of the initial pulse is called:

 
 
 
 

77.

The depth of penetration of surface waves is approximately:

 
 
 
 

78.

An ultrasonic test using a straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. This test should detect:

 
 
 
 

79.

The first critical angle is defined as the longitudinal wave incident angle which results in:

 
 
 
 

80.

The number of complete waves which pass a given point in a given period of time (usually one second) is referred to as the:

 
 
 
 

81.

The speed of sound in a given material depends on:

 
 
 
 

82.

A screen pattern containing a large number of low-level indications (often referred to as ‘hash’) could be caused by:

 
 
 
 

83.

In an A scan presentation, the horizontal baseline represents the:

 
 
 
 

84.

An ultrasonic instrument control which is used to expand or contract the horizontal base line of an A scan display is called:

 
 
 
 

85.

In a basic ultrasonic test pattern (A-scan) for contact testing, the initial pulse (assume no sweep delay is used):

 
 
 
 

86.

A term used in ultrasonics to express the rate at which sound waves pass through various substances is:

 
 
 
 

87.

Transducer focal lengths are normally specified as:

 
 
 
 

88.

The second critical angle is defined as the longitudinal wave incident angle which results in:

 
 
 
 

89.

Spurious or nonrelevant indications might be suspected if:

 
 
 
 

90.

A disadvantage of lithium sulfate as a transducer material is that:

 
 
 
 

91.

An advantage of using a ceramic transducer in search units is that:

 
 
 
 

92.

The three most common modes of sound vibration are:

 
 
 
 

93.

A larger diameter crystal results in:

 
 
 
 

94.

Entry surface resolution is a characteristic of an ultrasonic testing system which defines its ability to:

 
 
 
 

95.

Do higher frequency transducers produce which of the following?

 
 
 
 

96.

In immersion testing, verification that the search unit is normal to a flat entry surface is indicated by:

 
 
 
 

97.

Which of the following is true?

 
 
 
 

98.

Most commercial ultrasonic testing is accomplished using frequencies between:

 
 
 
 

99.

The longitudinal wave incident angle which results in the formation of a rayleigh wave is called:

 
 
 
 

100.

An ultrasonic testing technique in which the transducer element is not parallel to the test surface is called:

 
 
 
 

101.

In the same material, shear wave velocity is:

 
 
 
 

102.

Another name for a compression wave is a:

 
 
 
 

103.

Under most circumstances, which of the following frequencies would result in the best resolving power?

 
 
 
 

104.

The most useful range of incident longitudinal wave angles for ultrasonic testing is:

 
 
 
 

105.

Ultrasonic testing of material where the search unit is in direct contact with the material being tested may be:

 
 
 
 

106.

The echo on the cathode ray tube (CRT) which represents the far boundary of the material being tested is called:

 
 
 
 

107.

A standard block that can be used to calibrate an instrument for an angle beam range calibration is:

 
 
 
 

108.

The ability to detect echos from small reflectors is called:

 
 
 
 

109.

When the motion of the particles of a medium is parallel to the direction of propagation, the wave being transmitted is called a:

 
 
 
 

110.

In contact testing, the entry surface indication is sometimes referred to as:

 
 
 
 

111.

A second name for Rayleigh waves is:

 
 
 
 

112.

Sound beam intensity decreases exponentially with distance in the area called:

 
 
 
 

113.

A test method employing two separate search units on opposite surfaces of the material being tested is called:

 
 
 
 

114.

Which of the following is not (!) a requirement of a complaint?

 
 
 
 

115.

A plan view representation of a test piece is produced by which of the following?

 
 
 
 

116.

A widening of the front surface indication, when testing a rough surface, is caused by:

 
 
 
 

117.

When a vertical indication has reached the maximum signal height which can be displayed or viewed on the CRT of an ultrasonic instrument, the indication is said to have reached its:

 
 
 
 

118.

A material used between the face of a search unit and the test surface to permit or improve the transmission of ultrasonic vibrations from the search unit to the material being tested is called:

 
 
 
 

119.

When an ultrasonic beam passes through the interface between two dissimilar materials at an angle, a new angle of sound travel is formed in the second material due to:

 
 
 
 

120.

The velocity of sound waves is primarily dependent on:

 
 
 
 

121.

Piezoelectric ability is the property of a material to:

 
 
 
 

122.

The boundary between two different materials which are in contact with each other is called:

 
 
 
 

123.

An ultrasonic instrument control which is used to adjust the sharpness of the CRT screen display is called:

 
 
 
 

124.

A disadvantage of using a low-frequency ultrasonic transducer is:

 
 
 
 

125.

As transducer crystal thickness decreases:

 
 
 
 

126.

On the area-amplitude ultrasonic standard test blocks, the flat-bottomed holes in the blocks are:

 
 
 
 

127.

An ultrasonic instrument control which is used to expand or contract the horizontal baseline of an A-scan display is called:

 
 
 
 

128.

Greater depth of penetration in coarse-grained material may be achieved using:

 
 
 
 

129.

A disadvantage of using a low-frequency ultrasonic transducer is:

 
 
 
 

130.

A disadvantage of using a high-frequency ultrasonic transducer is:

 
 
 
 

131.

When a longitudinal wave sound beam passes through an acoustic interface at some angle other than zero degrees:

 
 
 
 

132.

The angle of a refracted shear wave generated as a sound wave passes at an angle through an acoustic interface is dependent on:

 
 
 
 

133.

The purpose of the couplant is to:

 
 
 
 

134.

Which of the following can be a source of spurious ultrasonic signals?

 
 
 
 

135.

When a sound beam is reflected:

 
 
 
 

136.

Sound beam intensity decreases exponentially with distance in the area called:

 
 
 
 

137.

The ability to detect echoes from small reflectors is called:

 
 
 
 

138.

The ability to separate echoes from reflectors close together in depth is called:

 
 
 
 

139.

Which of the following transducer materials is the most efficient receiver of ultrasonic energy?

 
 
 
 

140.

A display which shows the initial pulse and the front surface echo superimposed would be considered:

 
 
 
 

141.

A display that shows the initial pulse and the front surface echo with a fairly wide space between the two would be considered:

 
 
 
 

142.

When conducting an immersion test, the water path distance must be controlled so that:

 
 
 
 

143.

Bubblers and wheel transducers are considered:

 
 
 
 

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