Joining and assembly process-part 2

_____________________ use filler metals to permanently join metal parts, but there is no melting of base metals.

Brazing and soldering are used instead of fusion welding when

• High strength is required

• Metals have good weldability

• Geometry of joint not suitable for

  welding

• SImilar metals are to be joined

The use of a flux is essential in brazing in order to prevent oxidation and to remove oxide films from workpiece surfaces.

• True

• False

What is the name for mechanical fastening methods shown above:

• Clips

• Crimping

• Snap-in-fasteners

• Metal stitching and stapling

Inorganic acids or salts, such as zinc- ammonium-chloride solutions usually used as fluxes in soldering

• True

• False

Adhesive bonding can best be described as the following EXCEPT:

• It is among the very least cost method

• Joining process in which a filler material is used to hold two (or more) closely-spaced parts together by surface attachment

• Adhesive joints very strong joining as good as welded, brazed, or soldered joints

• Used in a wide range of bonding and sealing applications for joining similar and dissimilar materials such as metals, plastics, ceramics, wood, paper, and cardboard

Which of the following is NOT the type of adhesive?

• Natural adhesives

• Synthetic adhesives

• Composite adhesives

• Inorganic adhesives

Adhesively bonded joints are strongest under which type of stresses

• cracking

• cleavage

• peeling

• shear

Which of these statement is NOT correct about the advantages of adhesive joining.

• The appearance of components are generally improve

• The need of great care of surface preparations

• Thin and fragile components can be bonded without significant increase of their weight

• Materials of very different properties can be joined

To use adhesive bonding, the joints must cannot be subjected to _______ force.

• tensile

• peeling

• compression

• shear