MAE 1351 Practice Test Question with Verified
Correct Answers
Screw threads
Helix or conical spiral formed on the external surface of a shaft or on the internal surface of a
cylindrical hole.
Form
The shape of some common threads
External threads
located on the outside of the part
Axis
a longitudinal center line of thread
Root
the bottom of the cut on external threads
Crest
the top of external threads
Major diameter
the largest diameter of a screw thread
Minor diameter
the smallest diameter of screw thread
Pitch diameter
, an imaginary diameter measured from a point halfway between the major and minor
diameters through the axis to a corresponding point on the opposite side
Pitch
The distance from a point on a screw thread to a corresponding poing on the next thread as
measured perpendicular to the axis.
Depth of thread
the distance between the crest and the root of a thread as measured perpendicular to the axis
Angle of thread
the included angle between the sides of the thread
Body
that portion of a screw shaft that is left unthreaded
chamfer
an angular relief at the last thread to help the thread engage more easily with a mating part.
classes of threads
a designation of the amount of tolerance and allowance specified for a thread
fit
identifies a range of thread tightness or looseness
thread series
groups of common major diameter and pitch characteristics determined by the number of
threads per inch
Correct Answers
Screw threads
Helix or conical spiral formed on the external surface of a shaft or on the internal surface of a
cylindrical hole.
Form
The shape of some common threads
External threads
located on the outside of the part
Axis
a longitudinal center line of thread
Root
the bottom of the cut on external threads
Crest
the top of external threads
Major diameter
the largest diameter of a screw thread
Minor diameter
the smallest diameter of screw thread
Pitch diameter
, an imaginary diameter measured from a point halfway between the major and minor
diameters through the axis to a corresponding point on the opposite side
Pitch
The distance from a point on a screw thread to a corresponding poing on the next thread as
measured perpendicular to the axis.
Depth of thread
the distance between the crest and the root of a thread as measured perpendicular to the axis
Angle of thread
the included angle between the sides of the thread
Body
that portion of a screw shaft that is left unthreaded
chamfer
an angular relief at the last thread to help the thread engage more easily with a mating part.
classes of threads
a designation of the amount of tolerance and allowance specified for a thread
fit
identifies a range of thread tightness or looseness
thread series
groups of common major diameter and pitch characteristics determined by the number of
threads per inch
