Question No. 1

What factors influence the amount of initial tension?

Answer:

The factors influence the amounts of initial tension are

1. External load

2. Material used

3. Bolt diameter

Question No. 2

What is bolt of uniform strength?

Answer:

A bolt of uniform strength has equal strength at the thread and shank portion.

Question No. 3

What are the ways to produce bolts of uniform strength?

Answer:

The ways to produce bolts of uniform strength are

1. Reducing shank diameter equal to root diameter.

2. Drilling axial hole

Question No. 4

What stresses act on screw fastenings?

Answer:

Stresses act on screw fastenings are

1. Initial stresses due to screwing up

2. Stresses due to external forces

3. Combined stresses.

Question No. 5

What are the different applications of screwed fasteners?

Answer:

The different applications of screwed fasteners are

1. For readily connecting & disconnecting machine parts without damage

2. The parts can be rigidly connected

3. Used for transmitting power

Question No. 6

What are the advantages of screwed fasteners?

Answer:

The advantages of screwed fasteners are

1. They are highly reliable in operation

2. They are convenient to assemble & disassemble

3. A wide range of screws can be used for various operating conditions

4. They are relatively cheap to produce.

Question No. 7

Define pitch.

Answer:

Pitch is defined as the distance from appoint on one thread to the corresponding on the adjacent thread in the same axis plane.

Question No. 8

Define lead.

Answer:

Lead is defined as the distance, which a screw thread advances axially in one rotation of the nut.

Question No. 9

What are the different types of metric thread?

Answer:

The different types of metric thread are

1. BSW (British standard Whit worth)

2. BSE (British standard End)

Question No. 10

Define welding.

Answer:

Welding can be defined as a process of joining two similar or dissimilar metals with or without application of pressure along with or without addition of filler material.