Measurement and Metrology

When a set of readings of a measurement has a

wide range, it indicates

• high precision

• low precision

• high accuracy

• low accuracy

The difference between the lower and higher

values that an instrument is able to measure is

called

• Sensitivity

• range

• accuracy

• error

When determining the uncertainty for a

particular measurement device, the common

uncertainty factors that should be included are

• technician’s error

• random variability of the measurement process

• errors in the measurement technique and

  method

• all of these

Accuracy is defined as

• a measure of how often an experimental

  value can be repeated

• the closeness of a measured value to the real

  value

• the number of significant figures used in a

  measurement

• none of these

Conformity of a physical quantity to the national

standard of measurement is known as

• calibration

• sensitivity

• repeatability

• traceability

Systematic errors are

• random errors

• uncontrollable errors

• controllable errors

• none of these

Random errors can be assessed

• experimentally

• by performing sensitivity analysis

• empirically

• statistically

The modern metre is

• the length of the path travelled by light

  in vacuum during a time interval of

  1/399,792,458 of a second

• 16,50,763.73 × wavelengths of the red–orange

  radiation of a krypton 86 atom in vacuum

• 1,660,793.73 × wavelengths of the red–

  orange radiation of a krypton 86 atom in

  vacuum

• the length of the path travelled by light

  in vacuum during a time interval of

  1/29,97,92,458 of a second

When a measurement is made between two flat

parallel surfaces, it is called

• standard measurement

• line measurement

• end measurement

• direct measurement

Wringing of slip gauges is used in

• end measurement

• line measurement

• both line and end measurements

• primary standards