| 1. | The hardest material is ? | |
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cubic boron nitride
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tungsten carbide
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diamond
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carbon steel
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Report Question| 2. | Which one of the following material for lathe cutting tools can be forged to any desired shape ? | |
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high carbon steel
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high speed steel
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tungsten carbide
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satellite
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| 3. | Hand chasers is used for ? | |
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quick production of thread
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cutting threads on soft metal directly
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rectifying thread cut on steel rod which are distorted
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rectifying crest and root of thread formed by single point tool
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| 4. | Tap are surface treated to ? | |
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improve the appearance
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improve the were resistance property
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prevent them from corroded
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be used only on automatic threading machine
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| 5. | Which among the following statement is the correct to respect of chaser ? | |
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chaser is a single point cutting tool
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cutting threads by a chaser is slower process than that by a single point tool
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cutting thread by chaser gives better finish
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the same chaser can be used for cutting any pitch of the thread irrespective of the type of chase used
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| 6. | The negative rake angle is generally provided on the tool made of ? | |
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high speed steel
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tool steel
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high carbon steel
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tungsten carbide
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| 7. | The maximum side relief angle provided on parting tool is ? | |
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2°
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5°
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8°
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10°
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| 8. | Which among the following statements in respect of chip breakers is correct ? | |
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chip breakers are essential for breaking the long continuous chips in to small pieces
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chip breakers are necessary to break the chips to protect the finished work surfaces
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chip breakers are provided to curl and break the chips
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all of these
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| 9. | Chip breaker are meant to break continuous log chips, which one of the following types of chip breakers is found on a throw away insert with holder ? | |
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piece of sheet metal clamped to the holder in the path of the coil
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a step is ground on the throw away insert along the cutting edge
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a small groove ground at the cutting edge
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a carbide bit is screwed and held on the top face of the bit
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| 10. | Which one of the following statements is true with reference to be tool life ? | |
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time between starting and finishing a job
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total time for turning work including regrinding of tool
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time between two success regrinds
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time between starting of metal cutting and tool were out
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