MCQs for Mechanical Engineers

Q1. What is the primary purpose of using pipe fittings? To connect different sections of piping To increase the speed of fluid flow To reduce noise from fluid movement To make pipes look nicer Explanation: Pipe fittings play a vital role in constructing robust and efficient piping networks across residential, commercial, and industrial applications. Here’s why […]

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ASME Section IX Questions

ASME Section IX Questions

Q1: What is the primary purpose of ASME Section IX, Part QG? To outline the general requirements for welding To outline the general requirements for brazing To outline the general requirements for plastic fusing All of the above (Explanation: ASME Section IX, Part QG, is designed to cover the general requirements for various material-joining processes, including

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Interview Questions for Mechanical QAQC Engineer and Third Party Inspector Jobs

Interview Questions for Mechanical QA/QC Engineer and Third Party Inspector Jobs

Q1. How does the presence of molybdenum in SS316 affect its corrosion resistance compared to SS304? Increases resistance to pitting and crevice corrosion Enhances hardness and wear resistance Improves thermal conductivity Reduces ductility and toughness Answer: 1. Increases resistance to pitting and crevice corrosion (Explanation: The addition of molybdenum in stainless steel grade 316 (SS316)

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Interview Questions on Welding for Welding, QC Engineer and Third Party Inspector Jobs

Interview Questions on Welding for Welding, QC Engineer and Third Party Inspector Jobs

Q1. What is the primary purpose of a welding procedure specification (WPS)? www.weldingandndt.com To outline the qualifications of the welder To specify the welding process and variables To determine the cost of the welding project To schedule welding activities (Explanation: A Welding Procedure Specification (WPS) is a document that provides the details of the variables

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UT Questions

Ultrasonic Testing – UT (NDT) Questions and Answers for Level III and II exams

Q1. Which of the following factors can affect the accuracy of flaw detection in UT? www.weldingandndt.com Beam divergence Surface roughness Frequency of the ultrasonic waves All of the above (Explanation: Ultrasonic flaw detection in UT depends on several factors, with frequency selection being the most prominent. However, other factors also play a crucial role in

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Question Answers on Welding for CSWIP 3.1 and AWS CWI Exams

Q1) Which welding process is generally preferred for large-scale, high-production applications due to its high deposition rates and ability to weld thick sections? Submerged Arc Welding (SAW) Gas Tungsten Arc Welding (GTAW/TIG) Shielded Metal Arc Welding (SMAW/Stick) Flux-Cored Arc Welding (FCAW) (Explanation: Submerged Arc Welding (SAW) is the most suitable choice for large-scale, high-production applications.

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Question Answers on Welding for CSWIP 3.1 and AWS CWI Exams

Q1. Which of the following welding processes would give the highest heat input when using typical parameters? Tungsten Inert Gas welding Manual Metal Arc welding Submerged Arc welding Metal Active Gas welding (Explanation: The continuous feeding of the electrode and the use of granular flux contribute to sustained and intense heat, making SAW effective for

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Weld defect acceptance criteria thumbnail

Weld defect acceptance/rejection criteria as per ASME B31.1 Power Piping

The weld defect acceptance/rejection criteria are given in Chapter VI (Inspection, Examination, and Testing) of the ASME B31.1 – 2022 Power Piping Code. Chapter VI of ASME B31.1 contains the qualification of NDE Personnel and the acceptance/rejection criteria for the weld defects by the following examination methods; Visual Examination (Para 136.4.2) Magnetic Particle Examination (Para

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ASME Material Specification & Grades

ASME Material Specification and Grades for Pipes, Tubes, Forgings, Castings, Fittings, Valves, Nuts and Bolts

For the complete identity of a material we need two things; Material Specification  Material Grade For Example, In SA 106 Gr.B the “SA106” is the material specification, and “Gr.B” is the grade of the material. Please note that for a particular specification there may be more than one grade. For example, SA106 has three grades

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ASTM A 36 STEEL

ASTM A 36 Steel – Mechanical & Chemical Properties and Equivalent Steel Grades

ASTM A 36 or SA 36 is basically carbon steel of structural quality which is widely used in industries. It is also known as Carbon Structural Steel. ASTM A 36 is readily available in the following product form; Plates Bars Shapes (beams, channels, angles, etc.) In this article following topics will be covered; 1. Mechanical

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KNUCKLE JOINT ASSEMBLED

Knuckle Joints

WHAT IS A KNUCKLE JOINT? A knuckle joint is a type of mechanical joint used to join two components that are loaded under tensile load. One has a fork with holes on either side, forming a double eye, while the other component has a Single eye. The single eye is inserted between double eyes so

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Valve Terms Glossary

Glossary of Valve Terms

The commonly used terms and definitions related to valves is given below; Actual pressure drop: The difference between the inlet pressure and the outlet pressure of a valve. Actuator: A device used to open/close or control the valve. Key types include electrical, hydraulic, and pneumatic. Movement may be quarter-turn or multi-turn. Actuator stem: A rod

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Aluminum and aluminum alloys

Aluminum and aluminum alloys

Introduction: Aluminum is found on the earth in its oxidized form known as Bauxite. Bauxite is refined to produce Alumina (Aluminium Oxide – Al2O3). Approximately 40% – 60% Alumina i.e. Aluminium Oxide (Al2O3) can be extracted from Bauxite. The Hall-Héroult electrolysis process (invented in 1886) further processes Alumina (Aluminum Oxide-Al2O3) to separate it from oxygen.

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low hydrogen welding electrodes

Low Hydrogen Electrodes

Low Hydrogen electrodes are very popular in the industries because of the following reasons; Ability to produce X-ray quality welds Good weld bead appearance Ability to weld thicker material with high deposition rates Less susceptible to failures and cracks especially Hydrogen Induced Cracks Sound weld metal properties with good toughness A smooth, stable and quiet

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stainless steel welding

What is stainless steel

This article covers the following topics/questions; What is stainless steel? Types of stainless steel. Is stainless steel magnetic? Stainless steel welding and weldability. How to select the welding rod or filler wire? we will start this article with the first topic/question i.e what is stainless steel? WHAT IS STAINLESS STEEL? Stainless steels (SS) are essentially

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Underwater welder

Underwater Welding

Underwater welding plays a crucial role in repairing ships, offshore structures like oil drilling rigs, and submerged pipelines. The process of retrieving damaged components from underwater for repairs can be both costly and time-consuming. This is where underwater welding comes in, offering a cost-effective and efficient solution. One unique aspect of underwater welding is that

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Basics of heat treatment part 1

Basics of Heat Treatment for Metallic Material (Part-1)

Scope: In this article fundamentals of heat treatment will be discussed briefly mainly related to the “base material” of welded construction (metallic material) meant for industrial application. In Part-0, we had discussed the basics from a theory point of view generally taught in engineering colleges (Click here to read Part – 0). In the present

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How to select welding electrodes

How to select welding electrodes

The selection of right welding electrodes is a quite challenging job because we need to consider many factors while choosing the best alternative. In this article, we will discuss the various factors responsible for choosing the right welding electrode for the Shielded Metal Arc welding Process (SMAW) for Carbon steels. The Shielded metal arc welding

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