CWB Module 16 Exam Questions And 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 - 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
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 - 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
