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Millwright (First Year) > Measuring Tools Part A > Flashcards

Measuring Tools Part A Flashcards

1
Q

Basic (non-precision) measurement to within 1/64 inch (0.5mm). All measurement requires three elements, which are:

A
  1. The part
  2. The measurement device
  3. A standard
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2
Q

Six-Inch Steel Rules: what are the 3 types of reading of Ruler?

A
  1. Fractional inch rules cannot be measure any close than 1/64 inch
  2. Decimal inch rules measure to 1/100 inch (0.10 inch)
  3. Metric rules measure to 0.5mm
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3
Q

Types of Ruler (4 of them)

A
  1. Spring tempered rule
  2. Flexible rule
  3. Narrow rule
  4. Hook rule
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4
Q

Typical tolerance for Machinist

A

+/- 0.005

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5
Q

Types of Graduations (rule)

A
  1. Imperial inch fractional (1/8,1/16,1/32,1/64 inch)
  2. Imperial inch decimal ( 0.100, 0.050, 0.020, 0.010 inch)
  3. Metric ( 1mm & 0.50mm)
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6
Q

Types of Measuring tape

A
  1. Short line ( 30ft or 8m)

2. Long line ( 50ft or 30m)

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7
Q

Measuring tapes marking

A
  1. Foot-inch and continuous inch
  2. Metric
  3. Continuous inch and metric
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8
Q

Types of Precision Calipers

A
  1. Vernier Calipers
  2. Dial Calipers
  3. Electronic Calipers
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9
Q

Plate Protractors and Bevel protractors measure angle to within ___________?

A

One Degree (1*)

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10
Q

State the Equivalent of :
Full circle
1 degree
1 minute

A 
360 degrees (360*)
60 minutes  (60')
60 seconds  (60")
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11
Q

Plate Protractor is know as ________ and used for ?

A 
STEEL PROTRACTOR , 
Used for:
•Layout
•Checking the angle on cutting tools
•Verifying the point angle of a drill bit
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12
Q

3 types of Protractor

A

Plate Protractor
Bevel Protractor
Universal Bevel Protractor

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13
Q

Universal Bevel Protractor,
Each graduation on the MAIN SCALE represent ______.
Each graduation on the VERNIER SCALE represent ______.

A 
1 Degree (1*)
5 Minutes ( 1/2*)
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14
Q

3 types of Precision Calipers

A

Vernier Caliper
Dial Caliper
Electronic Digital Caliper

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15
Q

Parts of Vernier Caliper. (Name 7 of them)

A 
Fixed Jaw
Moveable Jaw
Vernier Scale 
Metric Scale
Inch Main Scale
Beam
Depth Blade
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16
Q

A Ruler that is about 3/16 inch thick and is NOT designed to be bent or flexed.

A

Spring-Tempered Rule

17
Q

What Ruler that can be flexed around curves?

A

Flexible Rule

18
Q

What type of Ruler that can be used in narrow enough to be used in tight spaces?

A

Narrow Rule

19
Q

Type of Ruler that has a hook at the end.

A

Hook Rule

20
Q

Are all Precision Calipers (Vernier, Dial and Electronic Digital caliper) same accuracy ?

A

Yes ( on the textbook )

21
Q

Is Micrometer is more accurate than Precision Caliper?

A

Yes

22
Q

Cheacking and Zeoring the Caliper.

A

Clean the Jaw and Close the Jaws and hold the caliper up to a light source make sure you don’t see any gap.

23
Q

________ Caliper use a rack and pinion gear to move a pointer around the face of a dial.

A

Dial Caliper

24
Q

Reason why we should not used the Electronic Digiral Caliper for measuring the 0.0001 inch or 0.02mm?

A
  • Mechanical looseness, also called play on the jaw
  • Deflection or Bending of the Beam
  • The Jaws on the caliper can wear
25
Q

3 Types of Height Gauges

A
  • Dial Height Gauge
  • Electronic Height Gauge
  • Vernier Height Gauge
26
Q

Parts of Vernier Height Gauges. (5 of them)

A
  • Beam
  • Clamp Screw
  • Sliding Vernier Scale
  • Scriber
  • Base
27
Q

What Height Gauges are used for ?

A

Height Gauge (Vernier) is a common precision layout tool and can be set to an accuracy of 0.001 inch or 0.02mm.

28
Q

Parts of Micrometer ( 7 of them )

A
  • Anvil
  • Spindle
  • Sleeve
  • Frame
  • Lock Nut
  • Thimble
  • Ratchet
29
Q

Micrometer Sizes

A

Imperial Micrometer have a range increment of 1 inch, which means that they measure from 0 to 1 inch, 1 to 2 inch and so on …..

30
Q

Types of Micrometer

A
  • Interchangeable Anvils
  • Combination Inch-Metric Micrometer
  • Electronic Digital Micrometer
  • Inside Micrometer
  • Intrimik
  • Depth Gauge Micrometer
31
Q

What you should do before using Micrometer?

A
  • Clean the measuring faces

* Check the micrometer for zero setting

32
Q

______ Micrometer offers greater precission than the standard micrometer because it subdivides the 0.001 inch or 0.01mm graduations.

A

Vernier Micrometer

Millwright (First Year) (4 decks)

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