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