CWB Module 16 Questions with Correct Answers

CWB Module 16 Questions with Correct Answers To ensure that calipers are accurate you would a) use a vernier b) calibrate them c) always take a reading to three decimal places - Answer-b) calibrate them 2. True or False? "Systematic errors can always be avoided by using a sufficiently precise measuring instrument." - Answer-False State one disadvantage of using a "go/no-go" type gauge for determining whether a product is within tolerance. - Answer-It does not give the actual measurement which could be useful in process control A high quality measuring instrument. . a) should not be calibrated unless something goes wrong b) should be calibrated by the operator every time it is used c) should be calibrated regularly as specified in a formal calibration program - Answerc) should be calibrated regulary as specified in a formal calibration program True or False? "When reading a meter with a pointer always stand directly in front to avoid a parallax error." - Answer-True State one reason for measuring dimensions from a single reference line or datum - Answer-To avoid cumulative errors When making accurate measurements with a long steel tape it is important that the tape ... a) be held loose so it does not stretch b) be held under the correct tension applied with a tension handle c) be held as tight as possible so there is no slack - Answer-b) be held under the correct tension applied with a tension handle What are two ways of checking if a surface is vertical? - Answer-Use a plumb bob or a spirit level How would you check that a flange is at right angles to the web if a try square could not contact the flange because of the fillet weld? - Answer-Measure with a rule from the flange to the try square at two points. the two reading should be the same Describe a simple method for checking a square - Answer-Place the square against a straight edge of a plate, scribe a line , flip it over and check if the line is square True or False? "When using a string as a reference line to measure distortion in a plate always make the measurements horizontally from the string to the plate." - Answer-True What instrument(s) would you use for checking the angle of a weld preparation? - Answer-Bevel gauge and/or protractor