DDT 164 Test #1 Study Guide

Question 1

Definition of a taper:

Answer 1

A conical surface on a shaft or hole

Question 2

When talking about tapers, TPI stands for __________

Answer 2

taper per inch

Question 3

When talking about tapers, TPF stands for ____________

Answer 3

taper per foot

Question 4

What is the equation relating TPI and TPF?

Answer 4

TPI=TPF/12, TPF=12xTPI

Question 5

What is an equation relating the Diameters, Taper and Length, for a taper?

Answer 5

LD - SD = T x L

Question 6

Definition of a developed blank _________________________________________

Answer 6

Length of a piece of metal before it is bent

Question 7

How do you calculate the developed blank for a part?

Answer 7

(.017453R+.0078T)N

Question 8

What does the equation (.017453R+.0078T)N give you?

Answer 8

Bend allowance or distance around the bend at the neutral axis

Question 9

From the equation (.017453R+.0078T)N what does the R stand for?

Answer 9

radius of inside bend

Question 10

From the equation (.017453R+.0078T)N what does the N stand for?

Answer 10

degree of bend

Question 11

When the metal bends it ___________ on the inside bend and ____________ on the outside bend.

Answer 11

compresses, stretches

Question 12

Definition of the neutral axis

Answer 12

Place where the metal doesn’t stretch or compress .44 from the inner edge

Question 13

What does RFS stand for?

Answer 13

regardless of feature size

Question 14

What does GD&T stand for?

Answer 14

Geometric Dimensioning and Tolerancing