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Flashcards in MTT test #2 Deck (30)
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1

Most Common fastener

Socket Head Fastener

2

Carriage bolt

Domed top with square block above threads

3

Pitch

Distance from one thread to another (1/TPI)

4

DRO

Digital Electronic Readout

5

Identify:
1/2 -13 UNC 2b

-1/2 = Major Diameter in inches
-13 = TPI
-UNC = Unified national Course thread
-2 = Class of fit
-b = internal

6

Minor diameter

major diameter - Pitch

7

TPI

Thread peaks length (measured one one inch)

8

Keys

Prevent rotation of gears or pulleys on a shaft.

9

Correct way to install washer

with tapered side facing the nut

10

difference between a screw and a bolt

the bold has a nut

11

Unified threads

-UNC Unified national Course thread
-UNS = Unified national special thread
-UNF = Unified national fine thread

12

Classes of threads

-Classes 1A & 1B have the greatest tolerance
-Class 2 fits are used on the largest percentage
of threaded fasteners.
-Class 3 fits will be tight when assembled.

13

Thread fits

A = external
B = internal

14

Difference between swivel base bench vice and toolmakers vise.

Toolmakers vice can spin 360 degrees.

15

Clamps used in machine shop, parallel or c-clamps?

c-clamps

16

types of pliers

slip-joint
diagonal
side cutting
round nose
needle nos
toung and groove
adjustable

17

toque measurement

force (pounds) x distance(feet)
or
force(newtons) x distance(meters)

18

types of socket wrench

4 point
6 point < most used in shop
8 point
12 point

19

Types of Screwdrivers

Standard
Phillips
Pozidriv®
Clutch head
Robertson
Torx®
Hex

20

blade sets

undulating
raker
alternate

21

File Cut Classifications

single cut
double cut
curved tooth
rasp

22

classify M10 x 1.5-6g

M - thread symboled for ISO (metric)
10 - major diameter in mm
1.5 - pitch of thread in mm
6g - class of fit

ISO

23

Dealing with Broken Taps

-Scribe
-Tap extractor
-Tap disintegrator
-Carbon steel taps can be removed by heating to
annealing temperature

24

keyway broaching

Add shims to push the keyway broach deeper into the part

keyway bushing
shim
keyway broach

25

how to calculate tap sizes

minor diameter = major diameter - pitch(1/TPI)

26

Three types of taps

tapper tap hole
Plug tap hole
bottom tap hole

27

hand reamer

1/64 undersize

28

chucking reamer

hole .015 undersize

29

types of keys

square key
gib-head key
Pratt & Whitney key
woodruff key

30

retaining rings

basic internal ring
basic external ring
inverted internal ring
inverted external ring
external self locking ring
internal self losing ring
tirnagular self locking ring