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CWB Module 16 Exam Questions And Correct Answers
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CWB Module 16 Exam Questions And Correct AnswersTo 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 - Answer
c) 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
Two methods for determining if a surface is vertical? - Answer Plumb bob or spirit level
How would you check that a flange was at right angles to the web if you were unable to
use a try square
touch the flange due to 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 an easy method of checking a square - Answer Place the square against a
straight edge of a plate, scribe a line, turn 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
According to CSA W59 what is the minimum distance from the weld at which to measure
the preheat in plates 44mm thick?
a) 75mm
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