Machine Design

1. A tube has the following advantage over pipe

1. lighter and easier to handle
2. greater shock absorption
3. smoother inside walls
4. all of the above
5. none of the above.

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2. Abacking ring is used inside the pipe joint when making a

1. butt weld
2. fillet weld
3. sleeve weld
4. socket weld
5. tube weld.

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3. A bench vice has following type of threads

1. metric
2. square
3. buttress
4. acme
5. BSW.

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4. A bolt

1. has a head on one end and a nut fitted to the other
2. has head at one end and other end fits into a tapped hole in the other part to be joined
3. has both the ends threaded
4. is provided with pointed threads
5. requires no nut.

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5. A hot short metal is

1. brittle when cold
2. brittle when hot
3. brittle under all conditions
4. ductile at high temperature
5. hard when hot.

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6. A key capable of tilting in a recess milled out in a shaft is known as

1. wood-ruff key
2. feather key
3. flat saddle key
4. gib head key
5. hollow saddle key.

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7. A key made from a cylindrical disc having segmental cross-section, is known as

1. wood-ruff key
2. feather key
3. flat saddle key
4. gib head key
5. hollow saddle key.

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8. A self locking screw has

1. fine threads
2. coarse threads
3. coefficient of friction > tangent of load angle
4. hole for inserting split pin
5. two nuts for locking.

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9. A stud

1. has a head on one end and a nut fitted to the other
2. has head at one end and other end fits into a tapped hole in the other part to be joined
3. has both the ends threaded
4. has pointed threads
5. requires locking nuts.

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10. A tap bolt

1. has a head on one end and a nut fitted to the other
2. has head at one end and other end fits into a tapped hole in the other part \o be joined
3. has both the ends threaded
4. has pointed threads
5. requires locking devices.

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