Recommended practice no snt tc 1a pdf

Bubble Test HB 2. Pressure Change Measurement HP 3. Questions utilizing such reference materials should require an understanding of the information rather than merely locating the appropriate answer. The minimum number of questions that should be given is as follows: 8. In such instances, the responsibility of certification of the employees shall be retained by the employer.

Technical Performance Evaluation The evaluation and documentation should follow the format and guidelines described in section 8.

If a person is being qualified directly to Level II with no time at Level I, the required experience shall consist of the sum of the times required for Level I and Level II and the required training shall consist of the sum of the hours required for Level I and Level II. Notes: 1. Method fundamentals and principles, 2. General knowledge of techniques within the Methods, 3. General interpretation of codes, standards, and specifications relating to the Method.

The following topical outlines further subdivide the main topical areas of both Basic and Method examinations, cite litera- ture references, and have sample questions typical of those in the examinations. ASNT Standard. Materials Evaluation.

A Guide to Personnel Qualification and Certification. Why Metals Fail. Dallas, Daniel B. Tool and Manufacturing Engineers Handbook, third edition. Taylor, J. Basic Metallurgy for Nondestructive Testing, revised edition. Latest edition. Extensive examples of representative questions for degree of difficulty, type, etc. Note: All questions and answers should be referenced to a recognized source. A qualitative description of the sustained signal level produced by rapidly occurring acoustic emission events is the accepted definition for: a.

Attenuation of a wave is best defined by which statement? A decrease in frequency with distance traveled. A decrease in amplitude with distance traveled.

A decrease in wave speed with distance traveled. A change in direction as a function of time. The number of times the acoustic emission signal exceeds a preset threshold during any selected portion of a test is called the: a. Level II 1. 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. Which of the following factors will tend to produce low-amplitude acoustic emission response during a tensile test? The Kaiser effect is: a. The impedance of an eddy current test coil will increase if the: a. Which of the following test frequencies would produce eddy currents with the largest depth of penetration? To generate measurable eddy currents in a test specimen, the specimen must be: a. The fill factor when a 1.

For age-hardened aluminum and titanium alloys, changes in hardness are indicated by changes in: a. Flux leakage inspection can normally be applied to: a. In the flux leakage examination of tubular products, which of the following discontinuities can be detected? The highest sensitivity of a Hall generator is obtained when the direction of the magnetic field in relation to the largest surface of the Hall probe is: a.

What particular type of defect is not indicated by flux leakage techniques? In the examination of tubular products where the flux sensor measures the leakage field at the outside surface of the tube: a. Before performing a vacuum box leak test, which of the following should be checked for required calibration?

Which factor can most affect the sensitivity attainable by a pressure bubble leak test? Which of the following directly determines the size of the bubble formation when testing using the bubble test method? The type of leaks that are most likely to go undetected during a bubble leak test are: a.

Good operating practice dictates that the period of time to allow for warm-up of the halogen diode detector prior to calibrating is: a. 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? Replace the standard leak. Replace the cylinder in the standard leak. Recharge the standard leak. Send the standard leak to the manufacturer for recharging. 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.

Any questions about the ordering process and returns should still be directed to ASNT Customer Support, at customersupport asnt. Effective 8 August, ASNT is discontinuing the practice of including paper errata inserts into new books. Errata should be verified by matching title, edition, and printing.

Errata are fixed with subsequent printings and editions. Recommended Practice No. It provides the educational, experience, and training recommendations for each NDT method. Since , employers have used this industry-valued document as the general framework for their NDT certification programs. Forgot Password? You are using an unsupported version of Internet Explorer, certain features of this site will not function correctly unless you upgrade.

Select a Category. Having trouble understanding what the expectation is or need to confirm your interpretation is correct? Submit an interpretation request. If not, the information is logged and forwarded to the interpretation panel to review and recommend a course of action. Depending on the outcome of the interpretation, it may be considered necessary to propose a change to SNT-TC-1A as a result of the interpretation.

In between publishing cycles, ISC receives questions, comments, and proposed changes from the public. If you have any proposed changes, send those to the ISC for review by the committee Standards asnt. All the committee asks is the proposer includes rationale for making any proposed changes to the document.