JOINING

Which best describe reason why mechanical assembly is often preferred compared others?

• ease of disassemble
• economies of scale
• no heat affected zone in the base parts
• specialization of labor

Most externally threaded fasteners are produced by which one of the following processes

• cutting the threads
• milling the threads
• tapping
• thread rolling

Which methods are used for applying torque to achieve a desired preload of a threaded fastener

• snap fit
• use of lockwasher
• torque wrench
• arbor press

Which of the following are the common ways in which threaded fasteners fail during tightening

• excessive compressive stresses on the head of the fastener
• excessive compressive stresses on the shank of the fastener
• excessive shear stresses on the shank of the fastener
• stripping of the internal or external threads

Advantages of snap fit assembly include which of the following

• ease of disassembly
• no heat affected zone
• no special tools are required
• stronger joint than with most other assembly methods

U-shaped fasteners is formed during stitching process while stapling are in preformed

• True
• False

Which of the following are considered good product design rules for automated assembly?

• design with the fewest number of components possible
• design using bolts and nuts to allow for disassembly
• design with many different fastener types
• design parts with asymmetric features

In adhesive bonding, which one of the following is the term used for the parts that are joined

• adherend
• adherent
• adhesive
• adhibit

Weldbonding is an adhesive joining method in which heat is used to melt the adhesive:

• True
• False

Adhesively bonded joints are strongest under which type of stresses

• cleavage
• shear
• cracking
• peeling