| 1. | The symbol conventionally used for vitrified bond is ? | |
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'V'
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'E'
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'R'
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'B'
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Report Question| 2. | A hardened die block (work) has to be ground. It is required to retain the same hardness even after grinding. If the work is over heated in the grinding process, it may result in work being rejected or scrapped. Probable reason for rejection is that the work surface is ? | |
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discoloured
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softened
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rough
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brittle
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| 3. | Grinding wheel is good condition make the ? | |
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flat sound
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dull sound
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ringing sound
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disable sound
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| 4. | The cutting tool with several thousand of cutting edges is ? | |
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lathe cutting tool
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drill
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grinding wheel
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milling cutter
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| 5. | Grinding fluids are used to ? | |
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reduce the friction between the wheel face and the job
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wash away chips
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prevent loading of wheel
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all of the above
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| 6. | Which among the following is not the cause for loading of the grinding wheel ? | |
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wheel speed is more than recommended
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proper grain size and grade of wheel
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dense structure
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feed is to fine
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| 7. | The open structured wheels are used to grind ? | |
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hard and brittle material
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plastic material
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soft and ductile material
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titanium material
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| 8. | The surface speed of vitrified bond wheel is ? | |
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1990 rpm
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2090 rpm
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1530 rpm
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2100 rpm
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| 9. | The _______ structured wheels are used for grinding brittle materials ? | |
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dense wheel
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open wheel
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any one of the above
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none of the above
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| 10. | It is comely observed that the face of a grinding wheel becomes shiny and smooth or glazed after some use due to one of the following reasons. Choose the correct answer ? | |
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grade of wheel is too hard
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abrasive of wheel is not suitable of the purpose
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grain size is too coarse
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structure of the wheel is too open
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