Chapter 22 Practice

What is metrology?

• The study of meteors

• The science of measurement

• The process of inspecting variables

• The system of units

Metrology is concerned with how many basic quantities?

• Five

• Six

• Seven

• Eight

Which of the following is NOT one of the seven basic quantities in metrology?

• Volume

• Length

• Electric current

• Luminous intensity

What does accuracy refer to in the context of measuring instruments?

• The smallest variation of the variable that can be detected

• How closely the measured value agrees with the true value

• The measure of the repeatability of the measurement process

• How long the instrument takes to measure the variable

What is precision in the context of measuring instruments?

• The operating range of the instrument

• The reliability of the measurement

• A measure of the repeatability of the measurement process

• The cost of the instrument

What is the Rule of 10 in the context of precision?

• The measuring instrument must be ten times less precise than the specified tolerance

• The measuring instrument must be ten times more precise than the specified tolerance

• The measuring instrument must be able to detect ten different variables

• The measuring instrument must have a resolution of ten units

What does resolution refer to in the context of measuring instruments?

• The cost of the instrument

• The speed of response of the instrument

• The smallest variation of the variable that can be detected

• The operating range of the instrument

What does speed of response mean for a measuring instrument?

• The cost of the instrument

• The reliability of the instrument

• How long the instrument takes to measure the variable

• The precision of the instrument

What does graph (a) in the image represent in terms of accuracy and precision?

• High accuracy and high precision

• Low accuracy and low precision

• High accuracy but low precision

• Low accuracy but high precision

What does graph (b) in the image illustrate about the measurements taken?

• They are both accurate and precise

• They are precise but not accurate

• They are accurate but not precise

• They are neither accurate nor precise