Deck 24: Surface Processing Operations

Question 1

Which of the following are reasons why workparts must be cleaned in industry (four best answers):

A)to avoid air pollution
B)to avoid water pollution
C)to enhance appearance
D)to enhance mechanical properties of the surface
E)to improve hygiene conditions for workers
F)to improve surface finish
G)to prepare the surface for subsequent processing
H)to remove contaminants that might chemically attack the surface

Answer 1

to enhance appearance
to improve hygiene conditions for workers
to prepare the surface for subsequent processing
to remove contaminants that might chemically attack the surface

Question 2

Which of the following chemicals are associated with alkaline cleaning (two correct answers):

A)borax
B)hydrochloric acid
C)propane
D)sodium hydroxide
E)sulfuric acid
F)trichlorethylene

Answer 2

borax
sodium hydroxide

Question 3

Ultrasonic cleaning combines chemical cleaning and mechanical agitation of the cleaning fluid to remove surface contaminants:

Answer 3

True

Question 4

In sand blasting, which one of the following blast media is used:

A)Al₂O₃
B)crushed nut shells
C)nylon beads
D)SiC
E)SiO₂

Question 5

Shot peening uses a high-velocity stream of which one of the following media:

A)Al₂O₃ grits
B)sand
C)SiC grits
D)steel pellets

Question 6

Tumbling is a mass finishing method that uses a rotating barrel that contains a mixture of parts and media:

Question 7

Which of the following processes generally produces a deeper penetration of atoms in the impregnated surface:

A)diffusion
B)ion implantation

Question 8

Calorizing is the same as which one of the following surface processes:

A)aluminizing
B)doping
C)hot sand blasting
D)siliconizing

Question 9

Which one of the following plating metals produces the hardest surface on a metallic substrate:

A)cadmium
B)chromium
C)copper
D)nickel
E)tin

Question 10

Electroforming is basically the same process as electroplating, but it is used to create a part formed around a pattern, and the plate thickness is much greater than in electroplating:

Question 11

Which one of the following plating metals is associated with the term galvanizing:

A)iron
B)lead
C)steel
D)tin
E)zinc

Question 12

Which of the following processes involves electrochemical reactions (two correct answers):

A)anodizing
B)chromate coatings
C)electroless plating
D)electroplating
E)phosphate coatings

Question 13

With which one of the following metals is anodizing most commonly associated (one answer):

A)aluminum
B)magnesium
C)steel
D)titanium
E)zinc

Question 14

Sputtering is a form of which one of the following:

A)chemical vapor deposition
B)defect in arc welding
C)diffusion
D)ion implantation
E)physical vapor deposition

Question 15

Which one of the following gases is the most commonly used in sputtering and ion plating:

A)argon
B)chlorine
C)neon
D)nitrogen
E)oxygen

Question 16

Chemical vapor deposition can be defined as the interaction between a mixture of gases and the surface of a heated substrate, causing chemical decomposition of some of the gas constituents and formation of a solid film on the substrate:

Question 17

The principal methods of applying powder coatings are which of the following (two best answers):

A)brushing
B)electrostatic spraying
C)fluidized bed
D)immersion
E)roller coating

Question 18

Porcelain enamel is applied to a surface in which one of the following forms:

A)liquid emulsion
B)liquid solution
C)molten liquid
D)powders

Question 19

Hard facing utilizes which one of the following basic processes:

A)arc welding
B)brazing
C)dip coating
D)electroplating
E)mechanical deformation to work harden the surface