[MAE 2381] CHAPTER 1QUESTIONS AND ANSWERS 2025

[MAE 2381] CHAPTER 1QUESTIONS
AND ANSWERS 2025
Elements of a Measurement - ANSWERMeasurand
System
Procedure
Data reduction and report

Measurand - ANSWERVariable to be measured
Examples: temperature, pressure, stress, length, time, heat flow, fluid flow

Measurement system - ANSWERInstruments

Stages of measurement system - ANSWERSensor
Transducer
Signal conditioning
Output

Sensor - ANSWERPhysical element that employs some natural phenomenon to
sense the variable being measured

Transducer - ANSWERConverts sensed info into detectable signal

Signal conditioning - ANSWERTakes transducer signal and modifies it to a desired
magnitude or form

Output - ANSWERIndicates or records the value measured

Specifications - ANSWERRange
Resolution
Static sensitivity/calibration coefficient

Range - ANSWERMinimum to maximum values for which measurement system is to
be used

Resolution - ANSWERSmallest increment in measured value that can be read (least
count)

Static sensitivity/calibration coefficient - ANSWERSlope of static calibration cruve

Errors - ANSWERHysteresis, sensitivity, linearity, zero, repeatability, random,
systematic

Random error - ANSWERRandom variation in measured values found during
repeated measurements of the variable. Not repeatable. Impossible to eliminate.
Noise. Can use statistics to state uncertainty.