Measurement, part A and Part B Flashcards Preview

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Flashcards in Measurement, part A and Part B Deck (19)
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1

3 types of units of measurement in 🇨🇦?

- metric (millimetres [mm])
- Imperial-decimal (0.0004 inch)
- imperial-fraction (1/64 inch)

2

__________ refers to an imperial standard size which is used for purpose of general identification.

nominal size

3

Definition of actual size ?

The measured size of component is the actual(measured) size or dimension.

4

__________ is the theoretical size to which the tolerance are applied.

Basic Size

5

_______ are the largest(upper limit) size and smallest(lower limit) size a part can be and still be acceptable.

Limit of Size

6

MMC and LMC stands for ?

Maximum Material Condition and Least Material Condition

7

________ is where both mating parts have the most mass(metal),

Maximum Material Condition (MMC)

8

_________ is the total of variation permitted is the size of duplicate parts.

Tolerance

9

What are the 2 types of tolerance ?

- Unilateral Tolerance
- Bilateral Tolerance

10

_______ is in one direction only from basic size and there is no Variation (Zero) in the other direction.

Unilateral Tolerance

11

________ is in both direction ( equally or unequal ) from basic size.

Bilateral Tolerance

12

In the ____________ method, only the maximum and minute mum dimension of the man part are specified.

limit dimension

13

_____ is the intentional difference between 2 mating parts at MMC.

Allowance

14

Positive allowance, the hole is ________ than the shaft while Negative Allowance is ________ the the shaft.

Larger And Smaller

15

The term of _____ describes the tightness or looseness between two mating parts.

Fit

16

3 types of fit

- Interference Fit ( Allowance is Negative)
- Clearance Fit ( Allowance is positive)
- Transition Fit ( Negative Allowance but the total tolerances exceed the allowance)

17

Factors that can affect design tolerance of the mating parts include:

- Load
- Temperature
- Lubrication
- Metal Type

18

2 types of fit system

Hole and Shaft Basis System

19

3 types Basic measurement

the Part
the Measuring Device
a Standard( device to measure against)