A quality engineer is responsible for making sure that manufacturing processes in industry are performed correctly using the right tools, materials with in acceptable tolerance .
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Q.1 What is Measurement?
Measurement is a Natural part of everyday life. We express daily needs in size & weights, water and electricity are also metered.
A number of blood samples, active sub-stain in medicine also needs to be precise.
I think it is Impossible to describe anything without measuring it.
Read More at Chapter-1 | What is Metrology & Measurement?
Q.2 What is Tolerance in Measurement?
The tolerances on the dimensions can be specified in three ways:
Unilateral Tolerance System
In this system, the tolerance is provided on only one direction from the basic size
For example 35.00 plus 0.2,plus 0.5
Bilateral Tolerance system
In this system, the tolerance is split into two parts and shown on both sides of the nominal size.
For example 35.00 plus 0.2,Minus 0.5
Limit Dimension system
In this system, the size and deviation of the part are specified by only maximum and minimum dimensions. For example 35.2 to 35.5 mm
Read More Chapter-2| Limit,Fit and Tolrance
Q.3 What is Calibration?
Calibration is the set of operations that establish under specified conditions, the relationship between values of quantities indicated by a measuring instrument or values represented by a material measure and the corresponding values realized by standards.
Read More Terminologies Used in Engineering
Q.4 What is Suitable Environment Condition for Measurement?
Temperature should be 20 +/- 2 degree Celsius and Humidity should be 50 +/- 10 %
Read More about Temperature Measurement
Q.5 What is least count of Vernier caliper and Micrometer?
Vernier Caliper is a widely used linear measurement instrument. It is used to measure linear dimensions like length, diameter, depth.
The most common Least count of Analog Vernier Caliper is 0.02 mm. You may also find vernier least count of 0.05 mm or 0.1 mm
There are three types of Vernier Caliper
Micrometer is used to check outside diameter of the shaft by the means of the accuracy of 0.01 mm or up to 0.001 mm.
Read More about Vernier and Micrometer
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