Deck 19: Representing and Dimensioning External Screw Threads

Question 1

The shape or profile of the thread is referred to as the ____.

A) thread profile
B) thread form
C) thread preference
D) thread structure

Answer 1

B

Question 2

A(n) ____ shows the threads as they appear to the eye.

A) pictorial representation
B) simplified representation
C) reference representation
D) schematic representation

Answer 2

A

Question 3

The ____ thread is noted on a drawing by the diameter of the thread followed by NPS.

A) tapered pipe
B) dryseal straight pipe
C) straight pipe
D) sealed pipe

Answer 3

C

Question 4

What are the Unified UN tread form and sizes designed to do?

Question 5

What are screw threads used for?

Question 6

In the accompanying figure, identify the illustrated thread and explain where it is used.

Question 7

The ____ thread is used where power is to be transmitted in one direction.

A) Buttress
B) Square
C) Acme
D) Load

Question 8

Describe a constant pitch series.

Question 9

Describe the extra fine series treads.

Question 10

In the accompanying figure, the item identified as number 2 is a ____ representation.

A) pictorial
B) simplified
C) reference
D) schematic

Question 11

List two ways that internal and external threads may be represented on mechanical drawings.