CAM 120 HMW 22

A typical water-to-oil ratio for emulsified oils is which one of the following

30:1

Which two of the following are not common ingredients in cemented carbide cutting tools

Al2O3 and CrC

If you had to select a cemented carbide for an application involving finish turning of steel, which C grade would you select

C7

High-speed steel is especially suited to simple cutting tool geometries such as single-point tools

False, High-speed steel is especially suited to complex cutting tool geometries such as twist drills, taps, broaches, and milling cutters

The steel cutting grades of cemented carbide are also used for cutting gray cast iron because it is a ferrous metal like steel

False, The nonsteel-cutting grades of WC-Co are used to machine gray cast iron

Steel-cutting grades of cemented carbide are typically characterized by which three of the following ingredients

TiC, WC, and Co,

Cast cobalt cutting tools are made into the desired tool geometry by casting, after which the cutting edges are ground to final size and sharpness

True

Changes in the sound emitted by the machining operation, as judged by the machine tool operator, represent one of the criteria sometimes used to assess tool life

True

Chip breakers are frequently used with single-point tools. They work by forcing the chips to curl more tightly than they would naturally be inclined to curl, thus causing them to fracture

True

Cutting edges on plain milling cutters are usually oriented at a helix angle to reduce impact on entry into the work

True

Extreme pressure lubrication is a special form of lubrication that involves the formation of thin solid salt layers on the hot, clean metal surfaces through a chemical reaction with the lubricant

True

broach consists of a series of discrete cutting teeth along its length and the feed is accomplished by the increased step between successive teeth

True

Most ceramic cutting tools are fabricated from which one of the following materials

aluminum oxide

Sialon is a cutting tool material containing which two of the following as its principal ingredients

aluminum oxide and silicon nitride

Which three of the following are names given to the three regions in the typical wear growth curve

break-in period, failure region, and steady-state wear

Which two of the following processes are used to provide very thin coatings on coated carbide inserts

chemical vapor deposition and physical vapor deposition

Which of the following are the two main types of gradual wear on a cutting tool

crater wear and flank wear

Which one of the following materials has the highest hardness

cubic boron nitrade

Which one of the following cutting fluid categories, according to chemical formulation, provides the best lubricating qualities

cutting oils

The basic Taylor tool life equation defines the relationship between which two of the following variables

cutting speed and tool life

Which three of the following changes in cutting conditions should be taken to reduce the possibility of a temperature failure of a single-point cutting tool

decrease depth of cut, decrease feed, and decrease cutting speed

Which three of the following changes in cutting conditions should be taken to reduce the possibility of a fracture failure of a single-point cutting tool

decrease depth of cut, decrease feed, and increase cutting speed

An increase in cobalt content has which two of the following effects on WC Co cemented carbides

decrease hardness and increase toughness

Synthetic diamond cutting tools are made from which one of the following starting materials

fine grain diamond crystals

Of the three possible modes by which a cutting tool can fail during a machining operation, which one is most preferable

gradual wear

Which one of the following drill types would be used to drill a hole with a very large depth-to-diameter ratio

gun drill

Of the following machining operations, which one would ceramic cutting tools be most appropriate

high speed finish turning

Coolant-type cutting fluids are most effective when used on which one of the following tool materials

high speed steal

With which one of the following tool materials would a single-point tool be designed with the highest positive rake angle

high speed steal

The feature of saw blade geometry that allows the blade to cut a kerf that is wider than the blade itself is called which one of the following

tooth set

The two basic types of high-speed steel are based on which of the following alloying ingredients in steel

tungsten and molybdenum

Which one of the following insert geometries would tend to provide the most number of cuts per insert

Rhombus

The cutting edges of high-speed steel tools can be heat treated to achieve hardness levels as high as which one of the following

Rockwell C 65

With which one of the following insert geometries would power requirements be highest

Round

Which one of the following is not a common material used as a coating on coated carbide cutting tools

SiC

Additions of titanium carbide in steel cutting grades of cemented carbides have which two of the following effects on properties

decreases flank wear resistance and increases crater wear resistance

As an alloying ingredient in high-speed steel, tungsten serves which two of the following functions

forms hard carbides to resist abrasion and increases hot hardness

Compared to high-speed steel and cemented carbides, ceramic cutting tools are most vulnerable to which one of the following failure modes

fracture failure

Lubricant-type cutting fluids are most effective at which one of the following cutting speeds

high speeds

Which three of the following are the most important properties of a tool material as suggested by the three modes of tool failure

hot hardness, toughness, and wear resistance

As an alloying ingredient in high-speed steel, chromium serves which three of the following functions

depth hardenability during heat treatment, forms hard carbides to resist abrasion, and increases corrosion resistance

The flutes on a twist drill serve which one of the following functions

provides passageways for extraction of chips

Which of the following are the two main functions of cutting fluids in machining

reduce friction at the tool chip interface and remove heat from the process

How many elements of tool geometry are required to completely specify a single-point tool

sevan

An alternative name for cemented carbides is which one of the following

sintered carbide

Which one of the following drill types would be the most likely choice to drill a hole with a 100 mm (4.0 in) diameter

spade drill

High-speed steel twist drills are often coated with a thin film of which of the following materials

tungsten carbid

Cast cobalt alloys typically contain which three of the following as their main ingredients

tungsten, cobalt, and chromium