| 1. | In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called ? | |
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friction zone
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work-tool contact zone
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shear zone
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none of these
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Report Question| 2. | A better machinable metal is one which gives ? | |
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lower chip-tool contact area and larger shear angle
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higher chip-tool contact area and smaller shear angle
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lower chip-tool contact area and smaller shear angle
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higher chip-tool contact area and larger shear angle
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| 3. | An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is ? | |
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cutting speed
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feed rate
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shear angle
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path of shear is large and chip is thin
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| 4. | The swing diameter over the bed is...............he height of the centre measured from the bed of the lathe ? | |
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equal to
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twice
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thrice
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one-half
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| 5. | Crater wear is mainly due to the phenomenon known as ? | |
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adhesion of metals
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oxidation of metals
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diffusion of metals
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all of these
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| 6. | The specific cutting energy used for establishing the machinability of the metal depends upon its ? | |
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coefficient of friction
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microstructure
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work hardening characteristics
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all of these
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| 7. | In reaming process ? | |
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metal removal rate is high
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high surface finish is obtained
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high form accuracy is obtained
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high dimensional accuracy is obtained
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| 8. | The lathe spindles at the nose end have ? | |
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internal screw threads
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external screw threads
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no threads
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tapered threads
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| 9. | Flank wear occurs mainly on the ? | |
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nose part, front relief face and side relief face of the cutting tool
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face of the cutting tool at a short distance from the cutting edge
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cutting edge only
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front face only
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| 10. | A single point thread cutting tool should ideally have ? | |
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zero rake angle
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positive rake angle
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negative rake angle
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point angle
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