fullpacodd

1. Types Of Destructive Material Testing

Metal Testing, metals testing methods, metallographic testing, failure analysis of metal. In addition to metal testing, our laboratory also does plastic testing, rubber testing, oil testing, paint testing, plating testing, adhesive testing, circuit board testing, and other testing. Composite Materials Test Methods. Composite materials tested include thermoset and thermoplastic composites, laminates, fiber reinforced composites, core materials, resins, films and adhesives.

This section describes the different types of testing that may be used to test a software during SDLC.

Manual Testing

Manual testing includes testing a software manually, i.e., without using any automated tool or any script. In this type, the tester takes over the role of an end-user and tests the software to identify any unexpected behavior or bug. There are different stages for manual testing such as unit testing, integration testing, system testing, and user acceptance testing.

Testers use test plans, test cases, or test scenarios to test a software to ensure the completeness of testing. Manual testing also includes exploratory testing, as testers explore the software to identify errors in it.

Automation Testing

Automation testing, which is also known as Test Automation, is when the tester writes scripts and uses another software to test the product. This process involves automation of a manual process. Automation Testing is used to re-run the test scenarios that were performed manually, quickly, and repeatedly.

Apart from regression testing, automation testing is also used to test the application from load, performance, and stress point of view. It increases the test coverage, improves accuracy, and saves time and money in comparison to manual testing.

What to Automate?

It is not possible to automate everything in a software. The areas at which a user can make transactions such as the login form or registration forms, any area where large number of users can access the software simultaneously should be automated.

Types Of Destructive Material Testing

Furthermore, all GUI items, connections with databases, field validations, etc. can be efficiently tested by automating the manual process.

When to Automate?

Test Automation should be used by considering the following aspects of a software −

• Large and critical projects
• Projects that require testing the same areas frequently
• Requirements not changing frequently
• Accessing the application for load and performance with many virtual users
• Stable software with respect to manual testing
• Availability of time

How to Automate?

Automation is done by using a supportive computer language like VB scripting and an automated software application. There are many tools available that can be used to write automation scripts. Before mentioning the tools, let us identify the process that can be used to automate the testing process −

• Identifying areas within a software for automation
• Selection of appropriate tool for test automation
• Writing test scripts
• Development of test suits
• Execution of scripts
• Create result reports
• Identify any potential bug or performance issues

Software Testing Tools

The following tools can be used for automation testing −

• HP Quick Test Professional
• Selenium
• IBM Rational Functional Tester
• SilkTest
• TestComplete
• Testing Anywhere
• WinRunner
• LoadRunner
• Visual Studio Test Professional
• WATIR

To tackle a do-it-yourself plumbing project, you need to know how to recognize different types of pipes. Recognizing the different types of pipes within your house is vital to knowing the right repair technique.

The most common pipes used today are copper, PVC, or ABS. However, when dealing with older homes, you might encounter a number of other piping material. For example, homes built before 1960 used galvanized steel or cast iron DWV (drain/waste/vent) pipe systems.

Here’s a quick look at types of pipes commonly used in homes, beginning with the pipes used for DWV systems.

• Cast iron: Commonly used before 1960 for the vertical drain, vent stacks, and sometimes the horizontal drain lines. Cast iron is durable, but can rust over time. Call a professional plumber to replace rusted sections with plastic (PVC or ABS) and the correct transition fittings.

• Plastic: Plastic pipe comes as either ABS (acrylonitrile-butadiene-styrene) or PVC (polyvinyl-chloride). Most homes since mid-1970 have plastic pipes and fittings because it’s inexpensive and easy to use. Simply glue the joints using a primer and liquid cement.

  • ABS: This black pipe was the first plastic pipe to be used in residential plumbing. Today, many areas don’t allow ABS in new construction because joints can come loose. Check with your local plumbing inspector if you want to use ABS.

  • PVC: This white or cream-colored pipe is the most commonly used pipe for drain lines. It’s strong, untouchable by chemicals, and seems to last forever! The rating and diameter is stamped right on the pipe.

  • Schedule 40 PVC is strong enough for residential drain lines, but check with your plumbing inspector first. CPVC (chlorinated polyvinyl chloride) pipe has the strength of PVC but is heat-resistant, which makes it acceptable in many regions for use on interior supply lines. Schedule 80 PVC is sometimes used for cold-water supply lines, but it isn’t allowed in some regions because it isn’t suitable for hot water.

    Do-it-yourselfers can handle ABS or PVC pipes, but call a professional for cast iron.

• PEX: PEX (cross-linked polyethylene) is the newest pipe for residential use. Approved in many regions of the country, PEX is easy to install because it cuts easily, is flexible, and uses compression fittings. However, more permanent connections require a special crimping tool. PEX is three to four times more expensive than copper or plastic.

• Steel: Galvanized steel pipe is common in older homes. Galvanized pipe is strong, but lasts only about 50 years. Before repairing, consider replacing instead. Call a professional to deal with it.

• Copper: Copper pipe is resists corrosion, so it’s commonly used pipe in water supply lines. It costs more than plastic but it lasts! There are two common types of copper pipe:

  • Rigid copper, which comes in three thicknesses. Type M is the thinnest but is strong enough for most homes. Types L and Type K are thicker and used in outdoor and drain applications. To cut rigid copper, you’ll need a wheel cutter, tube cutter, or a hacksaw. Pipes are usually connected with soldered (sweat) fittings and compression fittings can connect the pipe to shut-off valves.

  • Flexible copper, which is often used for dishwashers, refrigerator icemakers, and other appliances that need a water supply. It’s easy to bend, but if it kinks, you must cut the piece off and replace it. Sections of flexible copper pipe are joined using either soldered or compression fittings.

    Consider longevity and expense when choosing piping.