| 1. | Choose the best device to hold and locate a round bar drilling ? | |
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pin locator
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wedge type locator
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v-block
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adjustable locator
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Report Question| 2. | Which one of the following metals does not require any coolant during reaming ? | |
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Cast iron
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aluminium
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mild steel
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copper
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| 3. | Drill socket is used when the taper shank of the drill is ? | |
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smaller than the machine spindle
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larger than the machine spindle
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equal to the machine spindle
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none of the above
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| 4. | The reamer teeth and spacing are designed to assist in reaming more accurate holes with good surface finish. Which one of the following is true regarding the number of teeth and their spacing ? | |
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uneven number of teeth and uneven spacing
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uneven number of teeth and even spacing
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even number of teeth and uneven spacing
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even number of teeth and even spacing
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| 5. | The included angle of the counter sinking portion of a centre drill of type B used for protecting the centre holes is _________ ? | |
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75°
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90°
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100°
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120°
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| 6. | Boring is done to ? | |
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make surface flat so that the bolt head can take proper seat on the surface
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given fine finish to the drilled hole
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enlarge the existing hole
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produce thread on the hole
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| 7. | A hole is to be made on mild steel with a 12 mm diameter reamer. If the under size is 0.3 mm and if the over size 0.05 mm, What will be the diameter of the drill for drilling the hole before reaming ? | |
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12.35 mm
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10.65 mm
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11.65 mm
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11.05 mm
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| 8. | The process of bevelling the end of existing hole is called ? | |
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spot facing
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boring
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counter-boring
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counter-sinking
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| 9. | The reamer is a ? | |
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single point cutting tool
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multi-point cutting tool
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saw tooth cutting tool
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parting tool
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| 10. | Lip angle or angle of cutting edge of twist drill is ? | |
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181°
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128°
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108°
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118°
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