Related Questions

How long should a steel component be heat treated before nitriding?
A 5-20 hours
B 40-100 hours
C 100-200 hours
D 300-500 hours
Nitriding of steel is a process for
A Case hardening
B Spheroidising
C Normalising
D Annealing
Nitriding of a steel part does not increase its
A Grain size
B Fatigue limit
C Surface hardness
D Wear resistance
The purpose of nitriding the steel is to
A Harden its surface
B Soften its surface
C Improve its reliability
D None of these
Nitriding of steel is done (in electric furnace) at __________ °C.
A 510
B 1720
C 2210
D 910
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
A Vicker's hardness test
B Shore sceleroscope test
C Brinell hardness test
D Rockwell hardness test
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 ?
A Shore sceleroscope test
B Vicker's hardness test
C Brinell hardness test
D Rockwell hardness test
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to
A Total alkalinity
B Total hardness
C Total hardness total alkalinity
D Non carbonate hardness
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's
Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate

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