Measuring Tools Flashcards
What measurements require which three (3) elements?
- the part
- the measuring device
- a standard (device to measure against)
The four (4) common rule types are?
- Spring Tempered rule
- Flexible rule
- Narrow Rule
- Hook rule
What are the types of precision calipers?
- Vernier caliper
- Dial caliper
- Electronic digital caliper
What are the parts of the vernier height gauge?
- base
- beam
- vernier slide
- scriber
What are the parts of a micrometer?
- spindle and timble
- anvil
- ratchet
- locknut or lever
- sleeve
What are the caliper’s style?
- Spring caliper
- Firm joint calipers
- lock joint transfer calipers
What are three (3) styles of small hole gauges?
- twin ball
- hardened ball
- half ball
Dial indicators are available in?
continuous and balanced style
List three (3) types of dial indicators
- bottom plunger
- test indicators
- back or black plunger
The two (2) types of squares are?
- solid square
* combination square
Three (3) common style of graduations are?
- imperial (inch) fraction
- imperial (inch) decimal
- metric
The vernier scale of a universal bevel protractor has two scales, each with how many graduations?
12 graduations
What are the type of errors that you might encounter when using dial indicators?
- spindle travel
* cosine error
What is spindle travel?
is when the spindle travels, the greater the distance there is to travel, the more errors can creep into an indicator reading
What is cosine error?
Cosine error is when the axis of the linear measurement is not in line with the axis of measurement
developing an exaggerated measurement
A vernier micrometer uses a scale of?
.0001 inch or .002 mm
What do dial calipers used to move around the face of a dial?
a rack and pinion
Height gauges are used for what type of layout?
Precision layout
You should never use dial test indicators for?
Direct linear measurement
Each vernier scale graduation on a 50 division metric vernier height gauge is equal to what part in mm?
.02mm
What are the marking on a ruler called?
Graduations
What are the two(2) types of tapes?
- short line
* long line
What are the types of readings that a vernier caliper can perform?
- inside measurements
- outside measurements
- depths measurements
Plate protractors and bevel protractors measure angles to what degrees?
1° or one degree
Steel rules are usually?
6 inches
The most common unit used for angler measurements is?
degree
Universal bevel protractors can discriminate to what degree?
5 minutes of a degree
The imperial micrometer uses a screw thread with a pitch of?
.025 inch
Why is inside measurement more difficult to take than the outside measurements?
space is limited, and it can be difficult to align with the true diameter
What are the two (2) ways to apply proper force to a micrometer?
*ratchet stop
and
*the feel method
What is the best way to apply force to a micrometer?
ratchet stop method
Thickness gauges are also called the?
Feeler gauges
How is a reading taken with a micrometer?
by noting the position of the thimble against the sleeve
If a 1 inch micrometer does not read zero when you close it, you must adjust the?
sleeve
The plate protractor is also known as the?
Steel protractor
One complete revolution of the micrometer thimble increases and decreases the distance between measuring faces by?
.025 inch
What micrometers offers the most accurate readings?
Vernier micrometer
On the micrometer spindle there are, how many threads per inch?
40 threads per inch
After laying out the circumference of a hole with a pair of dividers, you should?
Prick punch witness marks around the circumference
Trammels are used when?
when you want to make a larger hole than the capacity of a scriber
When the axis of the dial indicator is not parallel with the axis of measurement, the result is?
an exaggerated reading. usually larger
What is the most common dial reading indicator use for shaft alignment?
The Black Plunger Dial test indicators
What is the most accurate tool used for scribing lines parallel to an edge?
the surface gauge
