Font size
WorksheetsIntroduction to Metrology
Total questions: 30
Worksheet time: 30mins
The degree of closeness of the measured value of a certain quantity with its true value is known as.......?
Accuracy
Precision
It is concern with the accuracy of measurements where these have influence on the transparency of economical transactions, and health and safety.
Scientific Metrology
Industrial Metrology
Fundamental Metrology
Legal Metrology
It is the susceptibility of a measurement device to have its indicators converted into meaningful numbers
Readability
Precision
Inspection
Error
It is the relationship between values of quantities indicated by a measuring instrument and the corresponding value realized by standards.
Calibration
Expectation
Precision
Range
It is called fundamental method and it is based on the measurement of the base quantities used to define a particular quantity.
Substitution Method
Comparison Method
Absolute Method
Coincidence Method
The value of the quantity to be measure is obtained directly without any calculation.
Direct Method
Indirect Method
Comparison Method
Absolute Method
Select the factors that affects the accuracy of measuring instruments
Environmental conditions
Inspector
Calibration
Standardization
It is the result of incapability of the system to response reliably to time-varying measurement.
Relative Error
Dynamic Error
Static Error
Absolute Error
______has been adopted as standard in most of the countries in the world.
System International
BIS
ANSI
DIN
A measure of consistency or repeatability of measurement.
Precision
Sensitivity
Resolution
Error
It is necessary to check all material, products and component parts at various stages during manufacturing, assembly, packing and installation on customer´s environment.
Precision
Need of Inspection
Calibration
Industrial Metrology
Predict the characteristic of the data given below if the true measurement is 0.30 mm
Observations: 0.24 mm, 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm
The above data is accurate but not precise
The above data is precise but not accurate
The above data is both accurate and precise
None of the above
WHAT IS METRO LOGY ?
It deals with measurement depending upon the field of application
Metro logy is the science of measurements.
It deals with accurate measurements
All of the above
Metro means _________
science
accuracy
measurement
dimension
In order to determine the suitability of any product or item ready to use ________ is always required.
Inspection
measurements
dimensions
drawings
Interchangeable part simple example
These are units of combination of two or more quantities
BASE UNIT
DERIVED UNITS
SPECIAL UNIT
SUPPLEMENTARY UNIT
BASE UNIT ONE EXAMPLE
METER
VOLUME
DENSITY
AREA
Derived unit example
LENGTH m
mass kg
VELOCITY m/s
time s
Which of the following causes is/are responsible for systematic errors?
change in sensitivity
non linearity
zero offset
All of the above
In which of the following length standards, parallax error is observed?
line standard
end standard
Both
None
Which of the following error is not a systematic error?
Error induced due to stylus pressure
Instrument location errors
Error due to parallax
Error due to play in the instrument’s linkages
The desirable static characteristics of a measuring system are
Accuracy, sensitivity and reproducibility
Accuracy and resproducibility
Drift and dead zone
Static error
If the instrument is used in wrong manner while application, then it will results in
Systematic error
Instrument error
Environmental error
Random error
Random errors in a measurement system are due to
Environmental changes
Unpredictable effects
Use of uncalibrated instrument
Poor cabling practices
What it indicates?
More precise and more accurate
No precise but accurate
neither precise nor accurate
accurate but not precise
What is the standard metric unit of length?
a hectare
an inch
a cubit
a meter
What is the metric unit for measuring mass?
pounds
kilograms
stone
Newtons
Prefix used for the multiplication factor 10 -9 is
Mega
Micro
Nano
Giga
Which is the correct usage
10Kg
10kg
10kgs
10K g
