Measurement
Semi-Precise
Precision
Technical Info
Sara's Choice
100
List 4 types of micrometers
inside, outside, depth, thread pitch, Vernier, standard
100
Semi-precision measurement is defined as?
greater than 1/64, 1/100, 1 degree, .5mm
100
Precision measurement is defined as:
smaller than 1/64, 1/100, 1 degree, .5mm
100
Explain each of the following items: (6 points) 1/4-20 UNC RH-1A
1/4-__________________________________________
20__________________________________________
UNC_________________________________________
RH-__________________________________________
1__________________________________________
6. A_________________________________________
major diameter
tpi
unified national course
right hand
class of fit
external
100
What is Sara's favorite snack?
dark chocolate (minimum 60 % coco content), it can be in combination with nuts, coffee, peanut butter, but not fruit or bacon
200
List two criteria in how to select the proper size for an outside micrometer, in terms of how they are classified?
range
precision or accuracy
200
List the names of 5 tools that are used for semi-precision measurement
steel rule, protractor, tape measurer, machinist square, combination set, fillet and radius gages, screw pitch gage
200
List the names of 5 tools that are used for precision measurement
micrometers
calipers
gage pins
gage blocks
height gage, surface plate
thread wires
200
what tool is used in a drill press or mill that removes very little material and maintains a very accurate hole?
reamer
200
What is Sara's Philosophy about helping students outside of class?
1. Schedule an appointment
2. She will put as much effort into helping you, as you do yourself
300
Explain the difference between draw filing and cross filing
draw filing, finish filing, hold file in left hand pull towards
cross filing, rough filing, moving file across the work
300
What are two major categories that classify hand tools?
cutting and non-cutting
300
name one reason why industry uses gage blocks?
field check measurement tools, gage block build up
300
define the following terms:
limits and tolerance
limits: maximum & minimum permissible dimension
tolerance: total permissible error
300
What is the motto for this hairstyle?
business in the front, party in the back
400
What two ways can surface finish be measured?
profilometer & scratch test
400
List two major safety practices that one must do upon entering a shop environment?
always wear PPE
know where the emergency exits are located
look for any spills or slick spots
beware of lockout/tagged out equipment
400
List the names of the tools for semi-precise and precise layout.
semi precise (use these tools)
precise (use these tools)
semi precise ( combination square , scribe)
precise (surface plate, sine bar, height gage)
400
Define the following terms:
allowance & fit
allowance: intentional difference in size
Fit: range of tightness between parts (clearance, interference, force fit)
400
What is the longest running sitcom of all time?
google says: the simpsons (1989-present)
500
Name the parts of the Micrometer
1. Frame
2. anvil
3. spindle
4. lock nut
5. sleeve
6. thimble
7. ratchet
500
List two uses of a dial indicator
dialing in a part on the lathe
measuring travel (depth of cut)
measuring runout
500
Name the parts to the surface finish symbol
roughness,
base symbol
waviness
cut-off
lay
500
What part of the thread profile are you measuring when you use a thread pitch micrometer or thread wires? (minor diameter, major diameter, pitch diameter, root, crest etc)
pitch diameter
500
What temperature do you set your cooker at to heat a bearing to the proper temp?
between porkchop and pancake