Guided Bend Test Fundamentals

The video tutorial explains the guided bend test, a method to assess the soundness and ductility of weld metal. It covers the purpose, types of bend specimens, preparation, and bending process. The setup of different guided bend machines is discussed, along with the evaluation process and standards for acceptability of welds.

What is the primary purpose of the guided bend test?

• To measure the hardness of the weld metal

• To check the electrical conductivity of the weld metal

• To determine the soundness and ductility of weld metal

• To evaluate the color of the weld metal

Why is the guided bend test popular?

• It is very expensive

• It is simple and cost-effective

• It requires advanced machinery

• It is complex and time-consuming

How many types of bend specimens are there?

• Six

• Five

• Four

• Three

What is the maximum thickness for a bend specimen?

• 1/2 inch

• 1 inch

• 3/8 inch

• 1/4 inch

What should be done to the weld reinforcement before bending?

• It should be removed

• It should be cooled

• It should be heated

• It should be painted

Which type of machine uses a plunger and shoulders to bend the specimen?

• Wraparound machine

• Conventional plunger and shoulder machine

• Roller machine

• Hydraulic press machine

What is the purpose of the rollers in the roller machine?

• To cool the specimen

• To heat the specimen

• To minimize resistance during bending

• To increase resistance during bending

What is the required width between the shoulders for a 3/8 inch specimen on a conventional plunger and shoulder machine?

• 1 inch

• 2 inches

• 2 and 3/8 inches

• 3 inches

What might cause discontinuities to appear during bending?

• Excessive heat

• Incorrect color

• Lack of fusion

• Improper cooling

What is the maximum allowable size for a single discontinuity?

• 1/4 inch

• 3/8 inch

• 1/2 inch

• 1/8 inch