Visual Testing (VT) Practice Exam

Which gage is used for measuring internal misalignment on a 76 mm (3 in.) diameter pipe?

1. A Cambridge gage

2. A fillet weld gage

3. A hi-lo welding gage

4. Both a and b

The correct answer is: A hi-lo welding gage

The most appropriate choice for measuring internal misalignment on a 76 mm (3 in.) diameter pipe is a hi-lo welding gage. This specialized gage is designed specifically to assess the alignment of pipe welds by measuring the height discrepancy between the two pipe ends being joined. It can accurately indicate the internal misalignment that may affect the quality of the weld and the overall integrity of the piping system. A Cambridge gage is generally used for measuring the wall thickness and diameters of pipes, while a fillet weld gage is focused on the dimensions of fillet welds rather than the internal alignment of pipes. While both of these tools serve important functions in welding and fabrication, they do not specifically measure internal misalignment like the hi-lo welding gage does. Therefore, the hi-lo welding gage is the correct instrument for this specific measurement task.