SNT-TC-1A

NDT Basic Examination (required only once when more than one method examination is taken). The minimum number of questions that should be given is as follows: 8.8.1.1.1 Fifteen (15) questions relating to understanding the SNT-TC-JA document 8.8 .1.1.2 Twenty (20) questions relating to applicable materials, fabrication, and product technology.

Twenty (20) questions that are similar to published NDT Level II questions for other appropriate NDT methods. 8.8.1.2 PdM Basic Examination (required only once when more than one method examination is taken). The minimum number of questions that should be given is as follows: 8.8 .1.2.1 Fifteen (15) questions relating to understanding the SNT-TC-JA document. 8.8 .1.2.2 Twenty (20) questions relating to applicable machinery technology

Color Contrast Differentiation. The examination should demonstrate the capability of distinguishing and differentiating contrast among colors or shades of gray used in the method as determined by the employer. This should be conducted upon initial certification and at five-year intervals thereafter

Vision examinations expire on the last day of the month of expiration.

For a pneumatically pressurized constant-volume system at an internal temperature of 27 oc, what approximate percentage change in the system absolute pressure can be expected for a system internal temperature change of 1 oc?

0.3 percent

When radiographing to the 2-2T quality level, an ASTM penetrameter for 6.35 em (2.5 in.) steel has a thickness of:

1 270 mm (5 x 10-2 in.)

Handheld magnifiers should fall into which of the following ranges?

5x to 10x

The description of the specimen, the NDT procedure, including check points, and the results of the examination should be documented.

NDT Level I Practical Examination. Proficiency should be demonstrated in performing the applicable NDT on one or more specimens or machine problems approved by the NDT Level III and in evaluating the results to the degree of responsibility as described in the employer's written practice.

Sample questions for general examinations are presented in the separate question booklets that can be obtained from ASNT Headquarters. These questions are intended as examples only and should not be used verbatim for qualification examinations. The following is a list of the booklets:

NDT Level I, II, and ill Written Examinations 8.7.1.1 All NDT Level 1, 2, and 3 written examinations should be closed-book except that necessary data, such as graphs, tables, specifications, procedures, codes, etc., may be provided with or in the examination.

While adjusting a reservoir-type variable-halogen standard leak, the operator accidentally vents the gas from the only standard leak available. Which of the following actions would quickly resolve the problem?

Recharge the standard leak

The mechanical/manipulation system has the function of and ____ _

holding the test object; positioning the test object between source and detector

The sharpness of the outline in the image of the radiograph is a measure of:

radiographic definition.

Which of the following camera parameters is not adjustable in post-processing computer software?

range

Computed radiography uses changes in ______ in lieu of changes in optical density change to produce a visual image

shades of gray

A commercial computed radiographic system classification, such as ASTM E 2446, groups CR systems using a _____ rating in order to characterize their relative performance levels.

standard image quality

When conducting helium mass spectrometer test of a vacuum vessel in the pressure range of 10-4 to 10-8 mrn Hg, which type gage could be used to measure the pressure?

thermionic ionization gage

The dominant electromagnetic energy distribution process in RFT is said to be:

through-transmission

The exciter and the receiver coil/coils in a remote field probe are separated by a distance greater than ___ the tube diameter

twice

The most widely used unit of measurement for measuring the rate at which the output of a gamma ray source decays is the:

curie

Spatial resolution has a limiting value determined by ____ of system and amount of data and _____ _

design and construction; sampling schema

Contrast sensitivity refers to the ability to _____ the presence or absence of features in an image.

detect

Which of the following conversion screens has the longest half-life?

dysprosium

As a visual examiner, you shall have your eyes checked at least:

every year

A narrow field of view produces:

higher magnification and a shorter depth of field

Which of the following is a discontinuity that might be found in a forging?

lap

Neutron penetration is greatest in which of the following materials?

lead

If a contact angle-beam transducer produces a 45-degree shear wave in steel (VS = 0.323 cm/s), the angle produced by the same transducer in an aluminum specimen (VS = 0.310 cm/s) would be:

less than 45 degrees.

Which of the following surfaces will provide the most accurate radiometric temperature measurement?

water-based paint

Certification:

written testimony of qualification.

The dimension indicated on the sketch of a micrometer is:

3.25 mm (0.128 in.)

The fill factor when a 1.26 em (0.5 in.) diameter bar is inserted in a 2.54 em (1 in .) diameter coil is:

0.25 (25 percent)

1.0 Scope

1.1 It is recognized that the effectiveness of nondestructive testing (NDT) applications depends upon the capabilities of the personnel who are responsible for, and perform, NDT. This Recommended Practice has been prepared to establish guidelines for the qualification and certification of NDT personnel whose specific jobs require appropriate knowledge of the technical principles underlying the nondestructive tests they perform, witness, monitor, or evaluate.

1.0 Scope cont.

1.2 This document provides guidelines for the establishment of a qualification and certification program. 1.3 These guidelines have been developed by The American Society for Nondestructive Testing, Inc., to aid employers in recognizing the essential factors to be considered in qualifying personnel engaged in any of the NDT methods listed in Section 3

If the characteristic frequency (fg) of a material is 125 Hz, the test frequency required to give an f/fg ratio of 10 would be:

1.25 kHz

1.0 Scope cont

1.4 It is recognized that these guidelines may not be appropriate for certain employers' circumstances and/or applications In developing a written practice as required in Section 5, the employer should review the detailed recommendations presented herein and modify them, as necessary, to meet particular needs Such modification may alter but shall not eliminate basic provisions of the program such as training, experience, testing and recertification. Supporting technical rationale for modification of detailed recommendations should be provided in an Annex to the written practice

The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4, respectively. If it is desirable to radiograph a (1.27 cm) 0.5 in. plate of copper, what thickness of steel would require about the same exposure characteristics?

1.78 cm (0.7 in.) of steel

A torr is defined as:

1/760 of a standard atmosphere

Which of the following test frequencies would produce eddy currents with the largest depth of penetration?

100Hz

When testing a bar with an LID ratio of 4 in a 10-tum coil, the required current would be:

1125 A

An NDT Level I, Level II, or Level III whose certification has been terminated may be reinstated to the former NDT level, without a new examination, provided all of the following conditions are met: 14.1.1 The employer has maintained the personnel certification records required in section 9.4.

14.1.2 The employee's certification did not expire during termination. 14.1.3 The employee is being reinstated within six (6) months of termination.

If an exposure time of 60 seconds were necessary using a 1.2 m (4ft) source-to-film distance for a particular exposure, what time would be necessary if a 0.61 (2ft) source-to-film distance is used and all other variables remain the same?

15 seconds

4.0 Levels of Qualification

4.1 There are three basic levels of qualification. The employer may subdivide these levels for situations where additional levels are deemed necessary for specific skills and responsibilities. 4.2 While in the process of being initially trained, qualified, and certified, an individual should be considered a trainee. A trainee should work with a certified individual . The trainee should not independently conduct, interpret, evaluate, or report the results of any NDT test

5.0 Written Practice

5.1 The employer shall establish a written practice for the control and administration of NDT personnel training, examination, and certification. 5.2 The employer's written practice should describe the responsibility of each level of certification for determining the acceptability of materials or components in accordance with the applicable codes, standards, specifications, and procedures.

.5.0 Written Practice

5.3 should describe the training, experience, and examination requirements for each level of certification by method and technique, as applicable. 5.4 should identify the test techniques within each test method applicable to its scope of operations. 5.5 shall be reviewed and approved by the employers NDT Level III. 5.6 shall be maintained on file.

A halogen standard leak of a certain size produces a known signal on a halogen leak detector. To receive this same intensity signal on the instrument during the test of an object containing a 2 percent by volume halogen-air mixture, the size of the leak in the object causing the signal would theoretically have to be at least times larger than the standard leak.

50

One set of internal dry bulb temperature data for a pressure change leakage rate test is: (T1 + T2 + T3)/3 = 71.87 °F (T4 + T5)/2 = 72.32 °F (T6 + T7)/2 = 72.68 °F (T8 + T9 + T10)/3 = 73.07 °F For each of these four sections of this system, the respective weighting factors are 0.27, 0.18, 0.22, and 0.33. The mean absolute dry bulb temperature of system air for this test data point is:

532.53 °R

6.0 Education, Training, & Experience Requirements for Initial Qualification 6.1 Candidates for certification in NDT should have sufficient education, training, and experience to ensure qualification in those NDT methods in which they are being considered for certification. Documentation of prior certification may be used by an employer as evidence of qualification for comparable levels of certification.

6.2 Documented training and/or experience gained in positions and activities comparable to those of Levels I, II, and/or III prior to establishment of the employer's written practice may be considered in satisfying the criteria of Section 6.3 .

6.3.2 NDT Level 3

6.3.2.1 Have a baccalaureate degree (or higher) In engineering or science. plus one additional year of experience beyond the level II requirements In NDT In an assignment comparable lo that of an NDT Level II In the applicable NDT method(s), or:

An ultrasonic longitudinal wave travels in aluminum with a velocity of 635,000 cm/s and has a frequency of 1 MHz. The wavelength of this ultrasonic wave is:

6.35 mm

Calculate the depth of a defect given the following information: Tx probe delay: 7.8 JA-S (Pulse-echo measured) Rx probe delay: 6.2 JA-S (Pulse-echo measured) PCS 59.6 rnm Bottom Tip Signal 30 JA-S Material Velocity 5960 m/s Longitudinal 3230 m/s Transverse 3010 m/s Surface

61.7 mm

A pressure of 66 .0 psig, in terms of absolute pressure at sea level and standard temperature, would be approximately:

80.7 psia

Calculate the PCS to focus at a 15 mm depth using a pair of 70-degree probes.

82.4 mm

Grading Unit:

A Qualification Specimen can be divided into sections called grading units, which do not have to be equal length or be equally spaced. Grading units are unflawed or flawed and the percentage of flawed/unflawed grading units required should be approved by the NDT Level 3.

Technique:

A category within an NDT method; for example, ultrasonic thickness testing.

Questions utilizing such reference materials should require an understanding of the information rather than merely locating the appropriate answer. All questions used for NDT Level 1 & 2 examinations should be approved by the responsible NDT Level 3.

A endorsement on an ACCP Level 2 certificate fulfills the corresponding criteria described in paragraphs 8.3 & 8.5 for each method. A valid Level 2 certificate may be accepted by the employer's written practice as fulfilling the General exam criteria described in paragraph 8.3 for each method.

3.0 Qualification and certification of NDT personnel in accordance with this Recommended Practice is applicable to each of the following methods

Acoustic Emission Testing Electromagnetic Testing Ground Penetrating Radar Guided Wave Testing Laser Testing Methods Leak Testing Liquid Penetrant Testing Magnetic Flux Leakage Magnetic Particle Testing Microwave Technology Neutron Radiographic Testing Radiographic Testing Thermal/Infrared Testing Ultrasonic Testing Vibration Analysis Visual Testing

The employer who purchases outside training services is responsible for assuring that such services meet the requirements of the employer's written practice

Administration and Grading

NDT Level II Practical Examination. Proficiency should be demonstrated in selecting and performing the applicable NDT technique within the method and interpreting and evaluating the results on one or more specimens or machine problems approved by the NDT Level 3.

At least ten (10) different checkpoints requiring an understanding of NDT variables and the employer's procedural requirements should be included in this practical examination. The candidate should detect all discontinuities and conditions specified by the NDT Level 3.

Certification of all NDT Levels of NDT personnel is the responsibility of the employer. Certification of NDT personnel should be based on demonstration of satisfactory qualification in accordance with Sections 6, 7, and 8, as described in the employer's written practice.

At the option of the employer, an outside agency may be engaged to provide NDT Level III services. In such instances, the responsibility of certification of the employees should be retained by the employer. 9.4 Personnel certification records should be maintained on file by the employer for the duration specified in the employers written practice and should include the following:

Which of the following is true?

Discontinuities that affect the product's usefulness are called defects

examinations prior to conducting and grading independent qualification examinations for NDT personnel. Additionally, the Practical exam should be administered by a person certified in the applicable NDT method as NDT Level II or III

For Level I and II, a composite grade can be determined by averaging of the results of the general, specific, & practical examinations below. For Level 3, the composite grade should be determined by averaging of the results of the basic, method, & specific examinations below.

Which element is commonly used for direct neutron radiography?

Gd

6.3.2 NDT Level 3 Cont.

Have completed with passing grades at least two years of engineering or science study at a university, college, or technical school, plus two additional years of experience beyond the NDT Level II requirements in NDT in an assignment at least comparable to that of NDT Level II in the applicable NDT method(s), or:

6.3.2 NDT Level 3 Cont.

Have four years experience beyond the NDT Level II requirements in NDT in an assignment at least comparable to that of an NDT Level II in the applicable NDT method(s). ·

The employer who purchases outside services is responsible for ensuring that the examination services meet the requirements of the employer's written practice

In no case should an examination be administered by one's self or by a subordinate.

The general examinations should address the basic principles of the applicable method

In preparing the examinations, the NDT Level III should select or devise appropriate questions covering the applicable method to the degree required by the employer's written practice

Why is dewowing important?

It allows positive and negative color filling to be used in the recorded trace.

Which one of the following is the correct relationship for converting temperature in degrees Rankin (0 R) to temperature in degrees Kelvin (K)?

K = (5/9) degree R

Composite grade or suitable evidence of grades . Signature of the Level 3 that verified qualifications of candidate for certification. Dates of certification & recertification & the dates of assignments to NDT. Certification expiration date. Signature of employer's certifying authority.

NDT personnel may be reexamined any time at the discretion of the employer and have their certificates extended or revoked.

Vision Examinations

Near-Vision Acuity. The examination should ensure natural or corrected near-distance acuity in at least one eye such that the applicant is capable of reading a minimum of Jaeger Number 2 or equivalent type and size letter at the distance designated on the chart but not less than 12 inches (30.5 em) on a standard Jaeger test chart. The ability to perceive an Ortho-Rater minimum of 8 or similar test pattern is also acceptable. This should be administered annually.

At least ten (10) different checkpoints requiring an understanding of test variables and the employer's procedural requirements should be included in this practical examination. The candidate should detect all discontinuities and conditions specified by the NDT Level III.

Note: While it is normal to score the practical on a percentile basis, practical examinations should contain check points that failure to successfully complete will result in failure of the examination.

The above NDT Level III requirements may be partially replaced by experience as a certified NDT Level II or by assignments at least comparable to NDT Level II as defined in the employer's written practice.

Personnel being considered for initial certification should complete sufficient organized training. The organized training may include instructor led training, self-study, virtual instructor led training, computer based training or web based training.

The training program should include sufficient examinations to ensure understanding of the necessary information.

Recommended training course outlines and references for NDT Levels I, II, and III personnel, which may be used as technical source material, are contained in ANSI/ASNT CP-105- Topical Outlines for Qualification of Nondestructive Testing Personnel.

All levels of NDT personnel shall be recertified periodically in accordance with one of the following criteria: 12.1.1 Evidence of continuing satisfactory technical performance.

Reexamination in those portions of the examinations in Section 8 deemed necessary by the employer's NDT Level III. 12.2 The recommended maximum recertification intervals are 5 years for all certification levels. Certifications expire on the last day of the month of expiration.

A valid endorsement on an ASNT NDT Level III certificate fulfills the examination criteria described in 8.8.1 and 8.8.2 for each applicable NDT method. 8.8.5 A valid endorsement of an ACCP Professional Level III certificate fulfills the examination criteria described in 8.8.1 and 8.8.2 for each applicable NDT method.

Reexarpination Those failing to attain the required grades should wait at least thirty (30) days or receive suitable additional training as determined by the NDT Level III before reexamination.

Name of certified individual. 9.4.2 Level of certification and NDT method. 9.4.3 Educational background and experience of certified individuals. 9 .4.4 Statement indicating satisfactory completion of training in accordance with the employer's written practice.

Results of the vision examinations prescribed in 8.2 for the current certification period. 9.4.6 Current examination copy(ies) or evidence of successful completion of examinations. 9 .4.7 Other suitable evidence of satisfactory qualifications when such qualifications are used in lieu of the specific examination prescribed in 8.8.3 .2 or as prescribed in the employer's written practice.

The employer may delete the specific examination if the candidate has a valid ACCP or ASNT NDT Level II certificate in the method/industrial sector and if documented experience exists to permit such

Successful completion of an ACCP Level II general hands-on practical examination may be considered as fulfilling the requirements of paragraph 8.5 . 8.7.3 .2 For the Film Interpretation Limited Certification, the Practical Examination should consist of review and grading of at least 20 images

6.3.1 NDT Levels 1 and 2

Table 6.3.1 A lists the recommended training and experience hours to be considered by the employer in establishing written practices for initial qualification of NDT Level I and Level II individuals 6.3.1 B lists initial training and experience hours, which may be considered by the employer for specific limned applications as defined in the employer's written practice. Limited certs should apply to individuals who do not meet the full training and experience of Table 6.3.1 A. Limited certifications issued In any method should be approved by the NDT Level Ill and documented In the certification records.

Phased Array and Time of Flight Diffraction Practical Examination. Flawed samples used for practical examinations should be representative of the components and/or configurations that the candidates would be testing under this endorsement and approved by the NDT Level III.

The NDT Level III is responsible to ensure that if the ACCP and ASNT NDT Level II specific and practical examinations are used by the employer, as stated in 8.7.2 and 8.7.3.1, the requirements of 8 .4.1, 8 .4.2 and 8.5 .5 are satisfied.

The minimum number of questions that should be given is shown in Table 8.3.4.

The candidate should demonstrate familiarity with and ability to operate the necessary NDT equipment, record, and analyze the resultant information to the degree required. 8.5.2 At least one flawed specimen or component should be tested and the results of the NDT analyzed by the candidate

The employer's certification shall be deemed revoked when employment is terminated. 13.2 An NDT Level I, Level II, or Level III whose certification has been terminated may be certified to the former NDT level by a new employer based on examination, as described in Section 8, provided all of the following conditions are met to the new employer's satisfaction:

The employee has proof of prior certification. 13.2.2 The employee was working in the capacity to which certified within six (6) months of termination. 13.2.3 The employee is being recertified within six (6) months of termination . 13.2.4 Prior to being examined for certification, employees not meeting the above requirements should receive additional training as deemed appropriate by the NDT Level III.

Twenty (20) questions relating to capability for interpreting codes, standards, and specifications relating to the method. 8.8 .3 Specific Examination (for each method). 8.8.3.1 Twenty (20) questions relating to specifications, equipment, techniques, and procedures applicable to the employer's product(s) and methods employed and to the administration of the employer's written practice

The employer may delete the specific examination if the candidate has a valid ASNT NDT Level III or ACCP Professional Level III certificate in the method and if documented evidence of experience exists, including the preparation of NDT procedures to codes, standards, or specifications and the evaluation of test results .

Periodically, as defined in the employer's written practice, NDT Level I and II personnel should be reevaluated by the NDT Level III administering a practical examination. The practical examination should follow the format and guidelines described in section 8.5 .

The employer's written practice should include rules covering the types and duration of interrupted service that requires reexamination and recertification. 11.2 The written practice should specify the requirements for reexamination and/or recertification for the interrupted service.

See the Appendix for example questions.

The minimum number of questions that should be given is shown in Table 8.3.4.

The specific examination should address the equipment, operating procedures, and NDT techniques that the individual may encounter during specific assignments to the degree required by the employer's written practice.

The specific examination should also cover the specifications or codes and acceptance criteria used in the employer's NDT procedures.

Thirty (30) questions that are similar to published NDT Level II questions for other appropriate PdM methods.

Thirty (30) questions relating to fundamentals &principles that are similar to published ASNT Level 3 questions for each method, & Fifteen (15) questions relating to application and establishment of techniques & procedures that are similar to the published ASNT NDT Level 3 questions for each method

What is gating?

Timing the transmit and receiver signals to avoid detrimental effects from strong signals.

Examinations administered by the employer for qualification should result in a passing composite grade of at least 80 percent, with no individual examination having a passing grade less than 70 percent.

When an examination is administered and graded for the employer by an outside agency and the outside agency issues grades of pass or fail only, on a certified report, then the employer may accept the pass grade as 80 percent for that particular examination.

Most leaks detected during a halogen sniffer test could have been detected and usually can be verified by:

a bubble leak test

Changes in the thickness of the specimen are indicated by in the digital image.

a change in grayscale

Outside Agency:

a company or individual who provides NDT Level ill services and whose qualifications to provide these services have been reviewed by the employer engaging the company or individual.

To generate measurable eddy currents in a test specimen, the specimen must be:

a conductor

Attenuation of a wave is best defined by which statement

a decrease in amplitude with distance traveled

While performing a halogen-diode detector test, the leak detector becomes difficult to zero, and the pointer on the leak rate meter repeatedly swings up scale. The most likely cause of the problem could be the use of too high a sensitivity range, a shorted element, an excessive heater voltage, or:

a high halogen background

Nondestructive Testing:

a process that involves the inspection, testing, or evaluation of materials, components and assemblies for materials' discontinuities, properties and machine problems without further impairing or destroying the part's serviceability. .

The helium mass spectrometer detector-probe pressure-test technique is:

a qualitative test

The purpose of a Bode or Polar (Nyquist) Plot is to verify the presence of:

a resonance

Recommended Practice:

a set of guidelines to assist the employer in developing uniform procedures for the qualification and certification of NDT personnel to satisfy the employer's specific requirements.

Written Practice:

a written procedure developed by the employer that details the requirements for qualification and certification of their employees

When detecting impulsive acoustic emission signals on large objects, the peak of the signals normally decreases with increasing distance from the source. This alteration, dependent on distance, must be explained by:

a. absorption: i.e., the elastic pulse gradually converts into heat b. dispersion: i.e., the pulse gradually spreads out in time because the different waves involved travel with different velocities c. the geometric factors: i.e., the energy in the pulse is distributed into ever-larger volumes

Which of the following is a propagating guided wave mode in pipe:

a. bulk compression wave b. bulk shear wave c. torsion wave

Neutron radiography can be used for inspecting which of the following applications?

a. presence of explosives in a metal device b. presence of foreign materials such as oil c. lubricants in metal systems d. hydrogen content in metals

Flat panel gain, offset and pixel calibrations ensure:

a. proper probability of detection (POD) b. measurements will be calibrated c. proper defect evaluation answer is d none of the above

Which of the following is a guided wave?

a. rayleigh waves b. flexural waves c. torsional waves

During an ACFM weld inspection, the measurement of crack depth requires the following information

a. the frequency of the inspection b. the length of the crack c. the depth of penetration of the AC field

The velocity of guided waves depends on:

a. the material properties b. the boundary conditions of the component or part c. the dimensions of the component or part

The number of times the acoustic emission signal exceeds a preset threshold during any selected portion of a test is called the:

acoustic emission count

The enter or store key on a programmable FFT-Analyzer/Data collector should be pressed

after the readings have settled down (usually 3 seconds or longer)

Which type of current has a "skin effect?"

alternating current

Which of the following directly determines the size of the bubble formation when testing using the bubble test method?

amount of leakage from a defect or leak

What is the medium between an ACFM probe and a metal surface when operating in air?

an electric current

The purpose of the radiation detector is to convert the measured transmission of X-rays through the object into ______ to be handled by electronic processing.

an electrical signal

Closed Book Examination:

an examination administered without access to reference material except for materials supplied with or in the examination (See 8.1.3).

Training:

an organized program developed to impart the knowledge and skills necessary for qualification.

Time of flight diffraction uses ultrasonic waves that are diffracted from the tips of:

cracks as well as transmitted along the scanning surface and reflected from the back surface.

Good operating practice dictates that the period of time to allow for warm-up of the halogen diode detector prior to calibrating is:

as recommended by the manufacturer

Which of the following best fits this description "the ultrasonic capabilities of resolving two adjacent defects along the acoustical axis through a small ultrasonic path":

axial resolution

Comparable:

being at an equivalent or similar level of NDT responsibility and difficulty as determined by the employer's NDT Level 3.

The term used to define the tendency of certain liquids to penetrate into small openings such as cracks or fissures is:

blotting

The most common form of GPR measurement is:

by deploying a transmitter and a receiver in fixed geometry over the surface

Guided wave testing of long lengths of pipe:

can determine the change in pipe wall cross section

Helium standard leaks in the range of I0-6 to 10-I0 atm. cc/s are known in general terms as:

capillary standard leaks

Gadolinium conversion screens are usually mounted in rigid holders called:

cassettes

The dispersion curves for guided waves in steel pipes are MOST influenced by:

changes to the boundary conditions

The best type of magnetic field to use to inspect a tubular product for surface defects along its length is a:

circular field

A commonly used method of checking on the overall performance of a penetrant material system is by:

comparing two sections of artificially cracked specimens

Visual examiners who perform visual exams using borescopes and fiberscopes must be:

competent in their use

For age-hardened aluminum and titanium alloys, changes in hardness are indicated by changes in:

conductivity

A qualitative description of the sustained signal level produced by rapidly occurring acoustic emission events is the accepted definition for:

continuous emission

How hot does an electrical connection need to be for it to be a classified as a serious problem?

depends on the criticality of equipment to continued safe operation

Qualification:

demonstrated skill, demonstrated knowledge, documented training, and documented experience required for personnel to properly perform the duties of a specific job.

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

different in diameter, increasing by 1164 in. (0.39 mm) increments from the No. 1 block to the No. 8 block

A fatigue crack perpendicular to the induced current will cause the induced current to:

disperse from the central area of the crack and concentrate around the ends

The ratio of the largest receivable signal and the minimal detectable signal is called the:

dynamic range.

A digital detector array (DDA) can best be defined by a(n):

electronic device that converts penetrating radiation into an analog signal and then digitized for display on a computer monitor

Real-time imaging of thermal neutron radiography can be performed with which of the following detectors?

europium

Flux leakage inspection can normally be applied to:

ferromagnetic materials only

The phenomenon which causes materials to emit light in response to external stimuli is known as:

fluorescence

Which of the following IR camera settings may affect a radiometric temperature measurement?

focus

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

frequency and transducer element size

An NDT Level III should be responsible for the administration and grading of examinations specified in Section 8.3 through 8.8 for NDT Level I, II, or other Level III personnel. The administration and

grading of examinations may be delegated to a qualified representative of the NDT Level III and so recorded. A qualified representative of the employer may perform the actual administration and grading of NDT Level III examinations specified in 8.8.

If a copper conductor is placed through a ferrous cylinder and a current is passed through the conductor, then the magnetic field (flux density) in the cylinder will be

greater than in the conductor

Which of these cracks may appear as an irregular, checked, or scattered pattern of fine lines usually caused by local overheating?

grinding cracks

Which of the following is most often used for dry magnetic particle inspection?

half-wave alternating current

Which of the following is the most commonly used method for removing non-water-washable visible dye penetrant from the surface of a test specimen

hand wiping

What effect would you expect if the coils in an ACFM probe were smaller and closer together?

improved detection of smaller defects

One of the main advantages of DR or flat panel utilization as compared to CR to accomplish an inspection task is typically:

inspection speed

When a vacuum gage is marked with a range of 0-30 with the notation "vacuum" on the face, the units of measurement are:

inches of mercury

When a system's internal dry bulb's internal temperature and, in tum, total pressure, increase during a pressure change leakage-rate test, the water vapor pressure in the system under test would normally:

increase

The presence of small traces of halogen vapors in the halogen diode detector:

increases the emission of positive ions

4.3.1 NDT Level I

individual should be qualified to properly perform specific calibrations, specific NDT, and specific evaluations for acceptance or rejection determinations according to written instructions and to record results. The NDT Level I should receive the necessary instruction and supervision from a certified Level 2&3

The vibration amplitude is really a response that is:

inversely proportional to the dynamic resistance in the system

ACT image is a representative map of ______ at each point in the plane.

linear X-ray attenuation coefficients

In the remote field zone with distance the magnetic field distribution decays:

linearly

Thermal infrared radiation occurs at wavelengths:

longer than visible light

Photo stimulated luminescence (PSL) is a process in which a phosphor that has ceased emitting light because of removal of the stimulus once again emits light when excited by light with than the emission wavelength.

longer wavelength

Frequencies selected for RFT inspection are:

lower than used in Eddy Current

If a magnetic is attached to an accelerometer, it will:

lower the frequency range capability of the accelerator

A Lissajous orbit that has a long elliptical (cigar shape) appearance is an indication of:

misalignment

Limited Certification

nondestructive test methods may be further subdivided into limited disciplines or techniques to meet specific employer's needs; these are NDT Level II certifications, but to a limited scope.

The term "bad pixel" is best described as a pixel:

of a DDA that has performance outside the specification range

The two most common problems that will produce a higher amplitude at 2x RPM than at 1 x RPM in a vibration spectrum are:

offset misalignment and mechanical looseness (Type B)

Which factor can most affect the sensitivity attainable by a pressure bubble leak test?

operator alertness and technique

What is one of the prime reasons to perform a DDA calibration?

optimize the performance of the DDA

The Bx magnetic field can best be described as:

parallel to the plate surface and perpendicular to the current flow

Flux leakage is created at a discontinuity because of the change in:

permeability

The ratio B/H is equivalent to a material's:

permeability

The highest sensitivity of a Hall effects sensor is obtained when the direction of the magnetic field in relation to the largest surface of the Hall probe is:

perpendicular

Digital detectors used for CR employ a unique crystalline material that can best be described as a _____ _ when exposed to ionizing radiation.

phosphor that stores a latent image

Computed radiography uses ______ in lieu of a film densitometer to determine exposure adequacy.

pixel value tool

Which of the following factors will tend to produce low-amplitude acoustic emission response during a tensile test?

plastic deformation

When conducting a penetrant test, spherical indications on the surface of a part could be indicative of:

porosity

The letters "psia" mean:

pounds per square inch absolute

Before performing a vacuum box leak test, which of the following should be checked for required calibration

pressure (or vacuum) gage

In a properly designed RFT probe, the detector coil is positioned in the:

remote field zone

4.33 NDT Level III cont.

should be responsible for the NDT operations for which qualified and assigned and should be capable of interpreting and evaluating results in terms of existing codes, standards, and specifications should have sufficient practical background in applicable materials, fabrication, and product technology to establish techniques and to assist in establishing acceptance criteria when none are otherwise available .

To be designated as a qualified representative of the NDT Level III for the administration and grading of NDT Level I and Level II personnel qualification examinations, the designee

should have documented, appropriate instruction by the responsible NDT Level III in the proper administration and grading of qualification

4.33 NDT Level III cont.

should have general familiarity with other appropriate NDT methods, as demonstrated by an ASNT Level III Basic examination or other means. in the methods in which certified, should be capable of training and examining NDT Level 1,2 and 3 personnel for certification in those methods.

4.33 NDT Level III

should have sufficient technical knowledge and skills to be capable of developing, qualifying, and approving procedures, establishing and approving techniques, interpreting codes, standards, specifications, and procedures; and designating the particular NDT methods, techniques, and procedures to be used

Identify the factors that would produce the largest beam steering angles:

small elements, small pitch, low-frequency testing high-velocity materials

A discontinuity is located having an orientation such that its long axis is parallel to the sound beam. The indication from such a discontinuity will be:

small in proportion to the length of the discontinuity

The extent to which a CT image reproduces an object or feature within an object is influenced by:

spatial resolution, statistical noise, slice plane thickness and artifacts

For which of the following inspection requirements could you not normally use ACFM for defect detection?

subsurface cracks in welded joints of mild steel

4.3.2 NDT Level II.

sufficient technical knowledge and skills to be qualified to set up and calibrate equipment and to interpret and evaluate results with respect to applicable codes, standards, and specifications. The NDT Level II should be thoroughly familiar with the scope and limitations of the methods for which qualified and should exercise assigned responsibility for on-the-job training and guidance of trainees and NDT Level I personnel. The NDT Level II should be able to organize and report the results of NDT tests The NDT Level II should be thoroughly familiar with the scope and limitations of the methods for which qualified and should exercise assigned responsibility for on-the-job training and guidance of trainees and NDT Level I personnel. The NDT Level II should be able to organize and report the results of NDT tests

Flux leakage techniques can normally be used to detect:

surface and near-surface discontinuities

What particular type of defect is not indicated by flux leakage techniques?

surface contamination

On many ultrasonic testing instruments, an operator conducting an immersion test can remove that portion of the screen presentation that represents water distance by adjusting a:

sweep-delay control

When conducting a long-duration pressure change test, it is necessary to measure absolute pressure or gage pressure plus barometric pressure because the barometric pressure will:

tend to vary

The impedance of an eddy current test coil will increase if the:

test frequency increases

The sensitivity of a mass spectrometer leak detection system is the mass flow rate of tracer gas:

that gives a minimum measurable signal

If a specimen were radiographed at 40 kV and again at 50 kV, with time compensation to give the radiographs the same density, which of the following statements would be true?

the 50 kV exposure would have lower contrast and greater latitude than the 40 kV exposure

The Kaiser effect is:

the absence of detectable acoustic emission until previously applied stress levels are exceeded

What happens to the beam spread at higher beam angles when using a swept angle scan from 45 to 70 degrees?

the beam spread increases

Documented:

the condition of being in written form.

Employer:

the corporate, private, or public entity, which employs personnel for wages, salary, fees, or other considerations.

Certifying Agency:

the employer of the personnel being certified.

Latent heat energy can be described as:

the energy that creates or breaks the molecular bonds of the phase state of a material

Certifying Authority:

the person or persons properly designated in the written practice to sign certifications on behalf of the employer.

Computer & web training should track hours and content of training with student examinations in accordance with 7 .2. The sufficiently organized training shall be such as to ensure the student is thoroughly familiar with the principles and practices of the specified NDT method related

to the level of certification desired and applicable to the processes to be used and the products to be tested. All training programs should be approved by the responsible NDT Level III.

The zone next to the "near zone" is called the:

transition zone

Electromagnetic waves separate into two independent components. What are they?

transverse electric field and transverse magnetic field

The diffusion pump and mechanical fore pump in a mass spectrometer leak detection system:

use different types of oil

How are guided wave testing results typically calibrated:

using an assumed amplitude and known reflectors such as welds

Which of the following is generally the more acceptable method for cleaning parts prior to penetrant testing?

vapor degreasing

What are the key wave field properties for GPR?

velocity, attenuation and EM impedance

The type of leaks that are most likely to go undetected during a bubble leak test are:

very small leaks and very large leaks

Experience:

work activities accomplished in a specific NDT method under the direction of qualified supervision including the performance of the NDT method and related activities but not including time spent in organized training programs.