# Measuring Tools Part A Flashcards

1
Q

What are the four types of steel rulers and there uses?

A

Spring tempered ruler-designed not to be bent. Accurate straight edge. Measures to 1/64 or .5mm

Flexible rule- made of thin stock used for measuring curves

Narrow rule-to be used in tight spaces

Hook rule-measure a chauffeur edge or line up with end of work piece

2
Q

What are the lines on a steel rule? What is the smallest measurement?

A

Fractional inch rule 1/64
Decimal inch rule .010
Metric rule .5mm

3
Q

A

Imperial inch
Decimal inch
Metric

4
Q

What 2 types of measuring tapes are there?

A

Short line - less then 30 ft

Long line - up to 60 ft

5
Q

What two tools are used for angular measurement? And what is there accuracy?

A

Plate protractor measure angles within 1 degree of accuracy

Universal bevel protractor. Measures angles within 5 minutes of a degree

6
Q

What are the angular measurement units?

A

Full circle 360 degrees
1 degree 60 minutes
1 minute 60 seconds

7
Q

What is the smallest increment the vernier scale can give you?

A
1. 001 inch or

0. 02mm

8
Q

What are the 3 types of precision callipers?

A

Vernier calliper
Dial calliper
Electronic digital calliper.

9
Q

What is a height gauge used for?

A

Height gauges are used for precision layout or for measuring how high a feature is above a flat surface.

10
Q

What are the 7 parts of a micrometer?

A

~~~

11
Q

What is the pitch of a imperial micrometer? How far does the thimble move on a complete revolution?

What is the pitch on a metric micrometer?

A

Pitch=0.025”
.025 inch every revolution

Metric pitch= 0.5mm

12
Q

What is a intramik

A

An intramik uses three contact points to measure across the true diameter.

13
Q

What tool can be used to measure depth?

A

Micrometer depth gauge

14
Q

What are thickness/feeler gauges used for?

A
• Check bearing clearance or gear backlash
• Check tappers, spark plug gaps
• check clearances to fit piston rings and pins
• gauge gaps in narrow slots
• measure angularity in coupling shaft
15
Q

What is a taper gauge used for?

A
• determine the width of a slot

- measure angularity of a coupling shaft alignment

16
Q

Vernier bevel protractor graduations measure ______ minutes?

A

5 minutes (1/12degree)
Broke into 90 degree segments

17
Q

A
18
Q

Checking the jaws of a vernier calliper is done by?

A

Close the jaws and hold up to the light. If you can see light through the jaws they are worn and need to be replaced

19
Q

How much pressure is applied to a vernier calliper?

A

Just enough pressure that the jaws remain in full contact with the workpiece

20
Q

Vernier scale imperial

A
21
Q

Metric vernier calliper

A
22
Q

How are vernier height gauges read?

A

Same as a vernier calliper

23
Q

What is the advantage of a 50-division vernier scale?

A

Half as many beam graduations as the 25-graduations making it much easier to read to .001” or .02mm

24
Q

Two ways to apply proper force to the micrometer?

A

1: close the micrometer with the ratchet stop until the ratchet stop clicks once.
2: close the micrometer by turning the the thimble until the feel is right.

Ratchet method is more consistent

25
Q

A
26
Q