16 Surface Finish

Question 1

Involves a change of surface properties to produce a hard, wear resistant shell about a tough, fracture resistant core

Answer 1

Case hardening

Question 2

Method used to check case depth on service parts

Answer 2

Eddy current ET

Question 3

An increase or addition of carbon to create a case depth

Answer 3

Carburizing

Question 4

Parts to be carburize maybe packed in carbon were other carbonaceous material in boxes that are sealed to exclude air and then heated in a furnace for the required length of time, in a process sometimes referred to as

Answer 4

Pack hardening

Question 5

A case hardening process that does not require a change of composition in the surface material is

Answer 5

Flame hardening

Question 6

Water containing sulfuric acid in a concentration for about 10 to 25% and at a temperature of approximately 65°C is commonly used in a process called

Answer 6

Pickling

Question 7

Cleaning method in which the cleaning medium is accelerated to high velocity and impinged against a surface to be cleaned

Answer 7

Blasting

Question 8

Blasting method that can improve surface finish, surface properties and is beneficial by reducing the likelihood of fatigue failure

Answer 8

Shot peening

Question 9

Water containing rust inhibiting chemicals may carry, in suspension, find abrasive particles that providing grinding and cutting type of action for finish improvement along with cleaning is known as

Answer 9

Liquid honing

Question 10

Maybe interpreted to mean any non-precision procedure providing a glossy surface but is most commonly used to refer to a surface finishing process using a flexible abrasive wheel

Answer 10

Polishing

Question 11

A fine abrasive carried in a wax or a similar substance is charge on the surface of a flexible wheel is known as

Answer 11

Buffing

Question 12

If a work is suspended in an electrolyte and connected to the anode in an electrical circuit, it will supply metal to the electrolyte in a reverse plating process. This polishing method is known as

Answer 12

Electropolishing

Question 13

A mixture of pigment in a drying oil

Answer 13

Paint

Question 14

A combination of natural or synthetic resins and drying oil

Answer 14

Varnish

Question 15

A mixture of pigment in varnish

Answer 15

Enamel

Question 16

Enamel that is actually a thin layer of glass fuse onto the surface of a metal usually steel or iron

Answer 16

Porcelain or Vitreous

Question 17

Shattered glass, ball milled in a fine particle size is called

Answer 17

Frit

Question 18

Frit is mixed with clay, water, and metal oxides which produces the desired color, to form a thin slurry called

Answer 18

Slip

Question 19

A process in which metal wire or powder is fed into an oxyacetylene heating flame and then, after melting, is carried by high velocity air to be impinged against the work surface

Answer 19

Metallizing or metal spray

Question 20

A process by which steel, heated in the presence of zinc dust becomes coated with zinc

Answer 20

Sherodizing

Question 21

Coatings are often apply to protect the material; their thickness can frequently be determined nondestructively by

Answer 21

Eddy current ET

Question 22

The best and most economical cleaners used for removal of oils and grease are

Answer 22

Petroleum solvents

Question 23

A corrosion protection material, only apply to steel by hot dipping and galvanizing is

Answer 23

Zinc

Question 24

A process that converts the base metal surface to an oxidized barrier layer of a very small porous cells is called

Answer 24

Anodizing

Question 25

The anodize surface on aluminum can produce a high back ground during this nondestructive test

Answer 25

Penetrant PT