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Which of the following tests are microhardness tests? P. Brinell Hardness Q. Rockwell Hardness R. Knoop Hardness S. Vickers Hardness
A brale indentor used in Rockwell hardness test has the following geometry and material.
Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?
The Brinell hardness measurement of a material is made by applying a 500 kg load with a 10 mm ball indentor. If the indentation diameter is 6 mm, the Brinell hardness (kg/mm2) will be
A resistance R is measured using the connection shown in the below figure. The current measured is 10 A on ranges 100A and the voltage measured is 125 V on 150 V range. The scales of the ammeter and voltmeter are uniform. The total number of scale divisions of the ammeter is 100 and that of the voltmeter is 150. The scale division can be distinguished. The constructional error of the ammeter is ± 0.3% and that of voltmeter±0.4%. The resistance of the ammeter is 0.25 Ω. The possible error in the measurement of R is?
Rockwell hardness test uses either a ____________ ball or ___________ cone for measuring hardness.
What is the APGAR scale? A. Scale to measure the height of mountains B. Time Measuring Scale C. Scale to determine the physical condition of a newborn D. Longevity scale
Arrange in the correct sequence from the lowest to the highest scale of measurement.
1. Interval scale
2. Ordinal scale
3. Ratio scale
4. Nominal scale
A sample of water when tested for hardness, gave total hardness value of 450 mg/l, and alkalinity value of 150 mg/l (on CaCO3 scale) respectively. The carbonate and noncarbonate hardness of the sample (in mg/l units) are respectively:
Rockwell hardness test has a scale range of _________