Understanding Screw Threads

What is the primary use of screw threads?

• To reduce friction

• To increase weight capacity

• To transmit power and motion

• To enhance aesthetic appeal

What are the two main classifications of screw threads?

• Metric and imperial

• Coarse and fine

• External and internal

• Circular and triangular

What is the best example of an external thread?

• Stud

• Screw

• Bolt

• Nut

What is the best example of an internal thread?

• Screw

• Bolt

• Nut

• Stud

What is the minor diameter of a screw thread also known as?

• Pitch diameter

• Major diameter

• Helix diameter

• Root or good diameter

What is the relationship formula between major and minor diameters?

• DC = Major - Minor

• DC = (Major + Minor)/2

• DC = D - Pitch

• DC = 0.842 to 0.81 D

How is pitch diameter defined in the context of screw threads?

• The smallest diameter

• The largest diameter

• The diameter at the crest

• The mean diameter between major and minor diameters

What is the major diameter of a screw thread?

• The smallest diameter

• The largest diameter

• The mean diameter

• The diameter at the pitch line

What is the pitch of a screw thread?

• The angle of the thread

• The distance between two points on adjacent threads

• The diameter of the thread

• The height of the thread crest

What angle do metric threads typically have?

• 45 degrees

• 55 degrees

• 75 degrees

• 60 degrees