| 1. | As the cutting speed increases _______________________ ? | |
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more heat is transmitted to the workpiece and less heat is transmitted to the tool
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more heat is carried away by the chip and less heat is transmitted to the tool
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more heat is transmitted to both the chip and the tool
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more heat is transmitted to both the workpiece and the tool
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Report Question| 2. | The process of producing a flat seat for a bolt head at opening of a drilled hole is ? | |
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counter sinking
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counter boring
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spot facing
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boring
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| 3. | Trepanning is used for ___________ ? | |
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small boring
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step boring
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bigger size holes
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blind holes
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| 4. | The distance a drill advanced in to the job in one complete revolution is is know as ? | |
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machining speed
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cutting speed
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feed
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rpm
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| 5. | The process of bevelling the end of drilled hole is know as ? | |
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spot facing
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boring
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counter boring
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counter-shinking
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| 6. | If the recommended cutting speed of mild steel is 20m/min. What is the rotational speed (rpm) required for a 20 mm drill bit ? | |
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120
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318
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1050
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2100
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| 7. | Quick return mechanism is used in a ? | |
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milling
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broaching
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grinding
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shaping
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| 8. | Which is the correct expression for unit of feed rate in drilling machine ? | |
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m/min
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mm/min
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mm/rev
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m/rev
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| 9. | In a milling machine. Rough and finish boring operation are carried out to machine a hole, which one of the following you will select for rough boring ? | |
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high spindle speed and coarse feed
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slow spindle speed and coarse feed
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slow spindle speed and fine feed
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high spindle speed and fine feed
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| 10. | For turning operation. If the spindle speed is 128 rpm and the diameter of the rod is 25 mm, what is the cutting speed ? | |
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100 m/min
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110 m/min
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10 m/min
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50 m/min
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