ASNT NDT Level III Leak Testing (LT) Examination — Information & Free Practice
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Exam Review
About ASNT NDT Level III Leak Testing (LT) Examination
ASNT NDT Level III Leak Testing (LT) Examination · US
Key exam facts
- Provider
- Pearson VUE or ASNT approved authorized exam centers
- Format
- In-person computer-based multiple-choice examination in written US English; no practical examination in this program
- Exam questions
- Total questions: 135; The total includes the scored and unscored questions.
- Time limit
- 4 hours
Topics covered
Principles and Theory
- physical principles in leak testing
- principles of gas flow
- proper selection of LT as method of choice
Equipment and Material
- leak testing standards
- detector and instrument performance factors
- vacuum pumps
- bubble testing practices and techniques
- absolute pressure testing equipment
- absolute pressure hold testing of containers
- absolute pressure leakage-rate testing of containers
- analysis of data for determination of accurate results
- halogen testing equipment
- helium mass spectrometer testing equipment
Technique and Calibration
- bubble test
- pressure change/measurement test
- halogen diode detector leak test
- mass spectrometer leak testing
- helium mass spectrometer vacuum testing by dynamic method
- helium mass spectrometer vacuum testing by static method
Interpretation and Evaluation
- basic techniques and units
- test materials and equipment effects
- effects of temperature and other atmospheric conditions
- calibration for testing
- probing and scanning or measurement and monitoring
- leak interpretation evaluation
- acceptance and rejection criteria
Procedures
Leak Testing Procedures
Leak Testing Specifications
Safety and Health
- safety considerations
- safety precautions
- pressure precautions
- safety devices
- hazardous and tracer gas safety
- types of monitoring equipment
- safety
How to prepare
Work through the topics, read the explanation after each answer, and revisit the areas where you miss questions. Use the official outline and reference materials below to guide your study.
These independent practice questions are not actual exam items and do not guarantee a passing result.
Frequently asked questions
What is the exam format?
In-person computer-based multiple-choice examination in written US English; no practical examination in this program
How many questions are on the exam?
Total questions: 135; The total includes the scored and unscored questions.
How long is the exam?
4 hours
Official sources and references
- ASNT NDT Level III Examinations
How to Plan for Your ASNT NDT Level III Exams and Review NDT Level III Exam Topic, scope adoption
- ASNT NDT Level III Examinations
Exam Topics > Leak Testing (LT), complete nested list, main section 5 / method div 5
- ASNT NDT Level III Examinations
Review NDT Level III Exam Topic, examination format
- ASNT Psychometrics Information
Exam Development Process, scored and pretest questions
- ASNT CS NDT Level III Program Document
PDF page 7, sections 5.2.2.1, 5.3.1, 5.4.1 and 6.2
- ASNT NDT Level III Examinations
Exam Topics > Leak Testing (LT), item count and time
- ASNT NDT Level III Examinations
When You’re Ready, Schedule Your NDT Level III Certification Exams, delivery and US center
- Pearson ASNT Certification Exams
On Exam Day, language policy
- ASNT NDT Level III Certification
Verify Your Education and Experience for NDT Level III Certification, full eligibility table and footnote
- ASNT NDT Level III Examinations
Scheduling > Need to make a change?, authorization period
Confirm current exam arrangements with the exam provider.