Deck 23: Screw Thread Representation and Threaded Fasteners

Question 1

Screws may be:

A)Held in place by a nut
B)Inserted through clearance holes
C)Inserted into a threaded hole in a mating part
D)All of the above are true

Answer 1

D

Question 2

If the end of an external thread is chamfered, the end view will appear the same regardless of the method selected to show the thread in the profile view.

Answer 2

True

Question 3

Bolts are generally smaller in size than machine screws and cap screws.

Answer 3

False

Question 4

Machine screws are stronger and more precise than cap screws.

Question 5

Washers and/or lock washers provide all of the following, EXCEPT:

A)They can distribute clamping pressure over a wider area
B)They can prevent marring or scratching the of surface by the rotating fasteners
C)They can allow the use of shorter screws or bolts
D)They can prevent loosening of threaded fastener assemblies

Question 6

Tapped holes that have threads that are cut to a specified depth are often referred to as "blind holes".

Question 7

Which of the ways of showing threads includes crest and root lines that are perpendicular to the axis of the thread?

A)Detailed
B)Schematic
C)Isometric
D)Simplified

Question 8

Which of the ways of showing threads is the most difficult and time-consuming to produce?

A)Detailed
B)Schematic
C)Isometric
D)Simplified

Question 9

Markings on the head of a bolt specify the bolt's material and grade classification.

Question 10

Bolts are externally threaded fasteners that are available in different grades of hardness and tensile strength.

Question 11

These screws might have a cone point, cup point, or oval point.

A)Setscrews
B)Cap screws
C)Machine screws
D)Studs

Question 12

Which of the ways of showing threads includes hidden lines to represent the root of the thread?

A)Detailed
B)Schematic
C)Isometric
D)Simplified

Question 13

Screw threads can be represented on drawings in three different ways. Which of the following is NOT one of the three ways?

A)Detailed
B)Schematic
C)Isometric
D)Simplified

Question 14

For internal threads, the appearance of the external view and the end view will not be affected by the representation method that is used.