Measurement Basics

It refers to the numeric expression of a manufactured object's dimensions based on a fixed reference.

• Instrumentation

• Measurement

• Precision

• Accuracy

With _____________, measuring instruments such as Vernier calipers, micrometers, and coordinate measuring machines are used to measure the dimensions of the target directly.

• Indirect Measurement

• Inferential Measurement

• Direct Measurement

• Methodological Measurement

With inferential measurements, the dimensions are measured using measuring instruments such as dial gauges that look at the difference between targets and reference devices such as gauge blocks and ring gauges.

• True

• False

• Tralse

• Maybe

In the International System of Units, the meter (m) is used as the SI unit (base unit) of length.

• True

• False

• Tralse

• Maybe

It is defined as how closely the result of an experiment agrees with the “true” or expected result.

• Accuracy

• Precision

• Sensitivity

• Selectivity

It is a measure of a method’s freedom from interferences.

• Accuracy

• Precision

• Sensitivity

• Selectivity

A method is considered ______ when it is relatively free from chemical interferences, and therefore it can be use on many analytes in a wide variety of sample matrices.

• Robust

• Rugged

• Sensitive

• Selective

In determining the scale of operation, which is not a consideration?

• amount of sample available for the analysis

• the expected concentration of analyte in the samples

• the source of sample for analysis

• the minimum amount of analyte that produces a measurable signal