PRACTICAL SKILLS

Question 1

Random error

Answer 1

using a ruler or any other type of analogue measuring equipment requires reading a scale

Question 2

Parallax error

Answer 2

human error that occurs due to incorrect positioning of the eyes while taking a reading on a measuring scale.

Question 3

Reducing parallax error

Answer 3

Eye level with the point being measured or use set squares with rulers

Question 4

How to reduce random error

Answer 4

take multiple measurements and find mean, omit (leave out) outliers

Question 5

Systematic error

Answer 5

error that affects all measurements equally

Question 6

Zero error

Answer 6

mitigated by zeroing or calibrating the equipment

Question 7

Full scale deflection

Answer 7

maximum value an analogue meter can measure

Question 8

micrometer

Answer 8

measured thickness to a very high degree of accuracy, it has a high and small resolution (~0.01mm)

Needs to be calibrated to see if there is zero error, if there is zero error - it is subtracted from every measurement

Question 9

vernier calliper

Answer 9

resolution of 0.1mm