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Instant Download API : API-577 Questions & Answers as PDF & Test Engine
- Exam Code: API-577
- Exam Name: Welding Inspection And Metallurgy
- Updated: Oct 11, 2026
- No. of Questions: 112 Questions and Answers
- Download Limit: Unlimited
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API API-577 Exam Overview:
| Certification Vendor: | American Petroleum Institute (API) |
|---|---|
| Exam Name: | Welding Inspection and Metallurgy Exam |
| Exam Number: | API-577 |
| Exam Format: | Multiple-choice questions, Closed-book exam |
| Exam Price: | $440 USD |
| Related Certifications: | API 510 Pressure Vessel Inspector API 653 Aboveground Storage Tank Inspector API 570 Piping Inspector |
| Exam Duration: | 195 minutes |
| Passing Score: | Scaled score, approximately 70% |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 110 (100 scored, 10 pre-test) |
| Recommended Training: | API Recommended Training Resources |
| Exam Registration: | API Official Registration |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Online remote proctored or in-person at Prometric test centers |
| Pre Condition: | Hold current API 510, 570 or 653 certification; or BS/BE + 1 year experience; or 2-year degree + 2 years experience; or high school + 3 years experience (all within last 10 years) |
| Official Syllabus URL: | https://www.api.org/products-and-services/individual-certification-programs/certifications/api577 |
API API-577 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Welding Procedures and Qualifications | 20% | - Essential and non-essential variables - Welding Procedure Specification (WPS) - Welder performance qualification - Procedure Qualification Record (PQR) |
| Industry Applications and Standards | 10% | - Refining and petrochemical plant welding requirements - Safety and quality control in welding operations - API RP 577 and related codes/standards |
| Welding Materials and Consumables | 15% | - Filler metal classification and selection - P-number and F-number assignments - Consumable storage, handling and control |
| Welding Processes | 20% | - Welding parameters and their effects - Common welding processes (SMAW, GTAW, GMAW, FCAW, SAW, etc.) - Process principles, equipment, applications and limitations |
| Welding Inspection Techniques | 15% | - Visual inspection methods and criteria - Inspection planning and documentation - Non-destructive examination (NDE) methods related to welding - Defect evaluation and acceptance standards |
| Welding Metallurgy | 20% | - Weld defects and metallurgical causes - Phase transformations and cooling rates - Material properties and classifications - Heat-affected zone (HAZ) and microstructure changes |
API-577 Exam Facts and Buying Questions
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The API-577 exam is the official assessment for the API Welding Inspection And Metallurgy certification from API. Across the wide landscape of IT certifications, this credential verifies that you can apply its published objectives in realistic scenarios — and since most candidates aim to succeed in one focused attempt, the quality of your practice material is the variable that matters most.
Official registration for the API-577 exam runs through these channels:
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Passing the API-577 exam requires Scaled score, approximately 70%, and the registration fee is $440 USD. Since one focused attempt is the goal for most candidates, thorough practice beforehand protects both your score and your wallet.
Simply leave your email address, and our support team will send the free API-577 exam demo to your inbox within 2 hours. This email delivery exists for a reason: it spares you the inconvenience of unsafe download links and online advertising. Your information is protected by strict encryption throughout, and never revealed to any company or individual. The demo itself is a genuine sample of the API Welding Inspection And Metallurgy materials, finished by our IT expert team — quality you can verify before spending anything.
Hold current API 510, 570 or 653 certification; or BS/BE + 1 year experience; or 2-year degree + 2 years experience; or high school + 3 years experience (all within last 10 years)
API offers these training resources for candidates:
Pair official training with a practice bank compiled by an expert team, and your preparation covers both understanding and application.
The official outline organizes the API-577 exam into weighted domains, including:
- Industry Applications and Standards (10%)
- Welding Inspection Techniques (15%)
- Welding Processes (20%)
The API Welding Inspection And Metallurgy practice questions at Lead2Passed are built around these same objectives — request the free demo by email to see how the content maps onto them.
The API-577 exam contains 110 (100 scored, 10 pre-test) questions with 195 minutes minutes to complete them. Timed practice under the same limits is the reliable way to make that constraint feel routine.
API Welding Inspection And Metallurgy Sample Questions:
What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?
- A. 1 ft. (300 mm)
- B. 3 ft. (900 mm)
- C. 4 ft. (1200 mm)
- D. 2 ft. (600 mm)
Correct Answer: D 🗳️
What is the liquid flow rate range that should be maintained in piping to be hot tapped?
- A. 1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)
- B. 2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)
- C. 4.1 - 5.5 ft./sec (1.25 - 1.68 m/sec)
- D. 0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)
Correct Answer: A 🗳️
The size and width of the weld HAZ is dependent upon:
- A. The heat input during welding.
- B. The thickness of the metal.
- C. The residual hardness of the weld joint.
- D. The properties of the base metal.
Correct Answer: A 🗳️
API Recommended Practice 2201 primarily covers the:
- A. Safety aspects of in-service welding.
- B. Technical aspects of hot tapping.
- C. WPS/PQR aspects of in-service welding.
- D. Weldability aspects of in-service welding.
Correct Answer: A 🗳️
For hot tap and in-service welding, above what carbon equivalent limit is it recommended to use extra low hydrogen electrodes to weld carbon steels?
- A. 0.30%
- B. 0.35%
- C. 0.42%
- D. 0.48%
Correct Answer: C 🗳️
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