CWB Module 12 Mechanical Testing of Welds Exam Questions with Complete Solutions

CWB Module 12 Mechanical Testing of Welds Exam Questions with Complete Solutions Exercise Questions - Section 5 2. Name 3 types of hardness testing machines - Answer-Brinell, Rockwell, & Vickers Exercise Questions - Section 5 3. Most hardness testing machines use the indentation test, where a penetrator of a given material, shape and size is forced into the surface of the material being tested by a given load. However one of the machines uses the principle of a bouncing hammer. How does this hardness tester work? - Answer-The rebound velocity of a tungsten carbide hammer is measured electronically and converted to a hardness value Exercise Questions - Section 5 4. In the Rockwell C scale, what is the major load that is used? a) 130kg b) 100kg c) 150kg d) 140 kg e) 160kg - Answer-c) 150kg Exercise Questions - Section 5 5. It is essential that there be no friction in the loading system of the machine or a _____________load will result. - Answer-Lighter Exercise Questions - Section 5 & 6 1. When making a hardness test, the thickness of the specimen is very important. As a rule, the thickness should be: a) 8 time the depth of the impression b) 5 times the depth of the impression c) 15 times the depth of the impression d) 10 times the depth of the impression e) 20 times the depth of the impression - Answer- Exercise Questions - Section 5 & 6 2. The most common toughness test is the ________ in which a notched specimen is broken by a swinging pendulum and the amount of energy required to break the specimen is recorded. - Answer- Exercise Questions - Section 5 & 6 3. True or False