2.  Flatness of surface

3.  Linear displacement measurements

4.  Surface roughness measurement

1.  Parallelism measurement

2.  Straightness measurement

3.  Flatness measurement

2.  rb = rp sin α

3.  rb = rp tan α

4.  rb = rp (cos α – α)

1.  Randomly distributed

3.  Distributed on both + ve and – ve sides of mean value

4.  Unpredictable

1.  Correction

2.  Discrepancy

3.  Error

1.  Vernier callipers

2.  Screw gauge

4.  Combination set

1.  Calibration errors

2.  Environmental errors

3.  Avoidable errors

2.  Random errors

3.  Avoidable errors

4.  Controllable errors

1.  Vertical calliper

2.  Man metric screw gauge

4.   Slip gauges

1.  

2.  

3.