Exam 19: Representing and Dimensioning External Screw Threads

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

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(Multiple Choice)

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Question 1

Correct Answer:

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

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Question 2

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What are screw threads used for?

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(Essay)

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Question 3

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Screw threads are used widely
(1) to fasten two or more parts securely in position,
(2) to transmit power, such as a feed screw, on a machine,
(3) to move a scale on an instrument used for precision measurements, and
(4) to adjust the alignment of parts.

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

(Multiple Choice)

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Question 4

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

(Essay)

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Question 5

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

(Essay)

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Question 6

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

(Multiple Choice)

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Question 7

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

(Essay)

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Question 8

Describe a constant pitch series.

(Essay)

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Question 9

Describe the extra fine series treads.

(Essay)

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Question 10

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

(Multiple Choice)

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Question 11

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Exam 19: Representing and Dimensioning External Screw Threads

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

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

What are screw threads used for?

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

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

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

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

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

Describe a constant pitch series.

Describe the extra fine series treads.

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

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Size and Location Dimensions

Dimensioning Cylinders, Circles, and Arcs

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Dimensioning Large Arcs and Base Line Dimensions

Tolerances Fractional and Angular Dimensions

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Interchangeable Parts, Allowances, and Classes of Fit

Representing and Specifying Internal and Left-Hand Threads

Dimensioning Tapers and Machined Surfaces

Dimensioning With Shop Notes

Metric System Dimensioning and Iso Symbols

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Cutting Planes, Full Sections, and Section Lining

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