Final Test Study Flashcards
HSS stands for?
High
Speed
Steel
HC stands for?
High carbon steel
Number of different drill measurements
4
Describe plug welding
It is melting a piece of metal welded on a broken stud to remove it
Cutting fluid is used for?
Improve hole finish Cools drill Cools workpiece Help clears chips Permit higher speed
Why is drill speed so important l?
Prevent breakage
Prevent premature wear
Prevent damage to workpiece
Describe filing flats
When you file a broken stud to for centre punch
What part of the tap does most of the work?
Tamper or Chamfer
Taps are used for?
Cutting internal thread
ISO stands for?
International
Standards
Organization
Parts of a twist drill?
Body
Shank
Point
NPT can identify?
A pipe thread
NPT stands for?
National Pipe Thread
Metric taps are identified by?
The letter M
SAE stands for?
Society of Automotive Engineers
Three techniques for thread repair
Drill and tap
Plug
Insert
Different ways drills are measuered in
Numbered
Lettered
Metric
Fractional
The ISO flare is measured in what unit?
Always metric
Three types of taps, in order of use
Taper
Plug
Bottoming
ILSAC stands for?
International Lubricant Standardization Approval Committee
Name the methods of identifying drill size
Read the identifying marks
Use Drill gauge
Measure the drill margins (diameter)
Formula for finding Tap Size
Tap Drill Size equals Bolt Size minus Pitch
Describe the process of Upsetting
Apply heat, to elongate the bolt.
Wait for the bolt to cool
The bolt will be longer, and smaller in diameter
A stud is broken off below the surface of a work-piece, what method can you use for removal?
Plug welding method
Name the flares associated with ISO and SAE
ISO bubble flare; SAE double flare
What is scale when referring to measurement?
How small the tool can measure
smallest measurement on the tool
Feeler Blades can measure?
Clearances between components
Stepped Feeler Blades measure?
Specific clearances
A dial indicator measures through which component?
The plunger
A Dial indicator has three different uses, name them
Can measure
Runout
Endplay
Lash
What is Lash?
Clearance between moving parts
The Revolutions Counter is in what place of the decimal?
The tenths
0.1
Imperial and Metric Calipers has three uses, name them
Outside dimensions
Inside dimensions
Depths
Most common Calipers?
Digital and Dial Calipers
Everytime the screw turns on and Imperial Micrometer is?
Based on the thread pitch
example is: 0.025
The process to convert a fraction into a decimal?
Division.
Divide top number by bottom number
What number do you start with when converting a decimal into a fraction?
Start with 64
Name four different application for an outside micrometer
Ware
Clearance
Engine Parts
Brake rotors
A general rule for a technician, when selecting a tool to measure?
Generally: If you have the capability, use the most precise tool
Every time the screw turns one rotation on a metric micrometer, how much does the spindle move?
0.50 mm
What do we have to find in order to measure a round pieces precisely?
We want to find the diameter, which will be the largest part
What is Parallax Error?
When the viewers eye is not directly above the measuring tool. Giving a false reading
The first steps when about to measure with any tool?
Check for wear, then check for zero setting
Why must me always leave a little space when storing the tool?
The metal will heat up, expanding and cause premature wear on the tool
What are transfer gauges, and name the two most common in the industry?
A tool with no graduation marks, meaning you would need another tool to take the actual measurement.
Examples are Small-Hole Gauges and Telescoping gauges
Plastigage is used for?
Measuring clearances, as it flattens out
Torque equals?
Lever length times force
What is an option to increase the limits of a torque wrench?
A torque multiplier
A lack of proper torquing can cause?
Premature wear or failure
What happens if you over tighten a Micrometer?
It will distort the frame, and may damage the item
