| 1. | Which among the following indicates the Ra value of surface roughness grade N8 ? | |
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6.3 um
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1.6 um
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3.2 um
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12.5 um
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Report Question| 2. | Which one of the following processing sequences will give the best accuracy as well as surface finish ? | |
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Drilling, Reaming, Jig grinding
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Drilling, Boring, Grinding
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Drilling, Reaming, Lapping
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Drilling, Reaming, Electroplating
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| 3. | Which is used to clean the lapping plate after charging ? | |
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petroleum oil
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petroleum jelly
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kerosene
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coolant oil
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| 4. | Which among the following abrasive is used for honing for non-ferrous material ? | |
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silicon carbide
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aluminium oxide
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boron carbide
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diamond
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| 5. | Raw value of a surface refer to ? | |
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type of a coating given on a surface
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heat treatment given on a surface
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roughness of a surface
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hardness of a surface
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| 6. | Which among the following abrasive is used for lapping soft steel ? | |
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silicon carbide
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aluminium oxide
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boron carbide
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diamond
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| 7. | Which among the following abrasive is used for lapping gauges ? | |
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silicon carbide
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aluminium oxide
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boron carbide
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diamond
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| 8. | In lapping, which abrasive is used for hard steel and cast iron ? | |
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silicon carbide
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aluminium oxide
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boron carbide
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diamond
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| 9. | Raw value in surface roughness means ? | |
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root sum square
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centre line average
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maximum valley depth
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maximum crest height
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| 10. | Which one of the following is the purpose for providing lengthwise grooves on the adjustable cylindrical laps ? | |
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to retain lapping paste
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to provide expansion
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to reduce friction
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to prevent distortion of the adjustable cylindrical lap
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