ADDA Drafting Certification: Competency 9
(Revolutions) UPDATED ACTUAL Exam
Questions and CORRECT Answers
revolution - CORRECT ANSWER - rotation of an object to show true length at an angle in
one view (foreshortens rest); used to eliminate need for auxiliary view; view that is revolved is
always the one where the axis is shown as a point and the view is not changed in shape and size;
in views where the axis shows a line, the dimension parallel to the axis remains unchanged
viewing plane - CORRECT ANSWER - plane from which an object is viewed (front, top,
right-side, etc.)
primary revolution - CORRECT ANSWER - revolution that occurs at another angle after
the initial revolution
successive revolutions - CORRECT ANSWER - view projected from a primary revolution
or another revolutions
plane - CORRECT ANSWER - three non-linear points in space, two non-parallel
intersecting vectors, two parallel vectors, or a line and a point non on line
true size - CORRECT ANSWER - surface that is shown in its actual size; plane is parallel
to the plane of projection
path of revolution - CORRECT ANSWER -
true length line - CORRECT ANSWER - ALWAYS parallel to the reference plane in ALL
adjacent views; actual size of line; to find, draw view of line where reference plane is parallel to
an adjacent view of the line
, true angle - CORRECT ANSWER - angle formed by two intersecting planes shown in its
actual measure
dihedral angle - CORRECT ANSWER - angle between two intersecting planes
rectified length - CORRECT ANSWER - (Determining the length of an irregular arc
segment?)
helix - CORRECT ANSWER - curve created by line winding around a shaft; curving path
that a point would follow if it were to travel in an even spiral around a cylinder and parallel to
the axis of that cylinder
revolved view - CORRECT ANSWER - view created from revolution of an object
axis of revolution - CORRECT ANSWER - line from which angle of revolution is
measured; shown as either point or line, depending on view
fold line - CORRECT ANSWER - The place where perpendicular viewing planes meet
each other along the straight edge of intersection
reference plane - CORRECT ANSWER - What is a plane that is parallel to the inclined
surfaces; shown as true length edge; used to lay off dimensions to develop auxiliary and revolved
views
parallel; perpendicular - CORRECT ANSWER - If a line is positioned ________ to a
projection plane and the line of sight is ________ to that projection plane, then the line will
appear as true length.
point - CORRECT ANSWER - If the line of sight is parallel to a true-length line, the line
will appear as a ________ view in the adjacent view (any adjacent view of a point of view of a
line will show the true length of the line.)
(Revolutions) UPDATED ACTUAL Exam
Questions and CORRECT Answers
revolution - CORRECT ANSWER - rotation of an object to show true length at an angle in
one view (foreshortens rest); used to eliminate need for auxiliary view; view that is revolved is
always the one where the axis is shown as a point and the view is not changed in shape and size;
in views where the axis shows a line, the dimension parallel to the axis remains unchanged
viewing plane - CORRECT ANSWER - plane from which an object is viewed (front, top,
right-side, etc.)
primary revolution - CORRECT ANSWER - revolution that occurs at another angle after
the initial revolution
successive revolutions - CORRECT ANSWER - view projected from a primary revolution
or another revolutions
plane - CORRECT ANSWER - three non-linear points in space, two non-parallel
intersecting vectors, two parallel vectors, or a line and a point non on line
true size - CORRECT ANSWER - surface that is shown in its actual size; plane is parallel
to the plane of projection
path of revolution - CORRECT ANSWER -
true length line - CORRECT ANSWER - ALWAYS parallel to the reference plane in ALL
adjacent views; actual size of line; to find, draw view of line where reference plane is parallel to
an adjacent view of the line
, true angle - CORRECT ANSWER - angle formed by two intersecting planes shown in its
actual measure
dihedral angle - CORRECT ANSWER - angle between two intersecting planes
rectified length - CORRECT ANSWER - (Determining the length of an irregular arc
segment?)
helix - CORRECT ANSWER - curve created by line winding around a shaft; curving path
that a point would follow if it were to travel in an even spiral around a cylinder and parallel to
the axis of that cylinder
revolved view - CORRECT ANSWER - view created from revolution of an object
axis of revolution - CORRECT ANSWER - line from which angle of revolution is
measured; shown as either point or line, depending on view
fold line - CORRECT ANSWER - The place where perpendicular viewing planes meet
each other along the straight edge of intersection
reference plane - CORRECT ANSWER - What is a plane that is parallel to the inclined
surfaces; shown as true length edge; used to lay off dimensions to develop auxiliary and revolved
views
parallel; perpendicular - CORRECT ANSWER - If a line is positioned ________ to a
projection plane and the line of sight is ________ to that projection plane, then the line will
appear as true length.
point - CORRECT ANSWER - If the line of sight is parallel to a true-length line, the line
will appear as a ________ view in the adjacent view (any adjacent view of a point of view of a
line will show the true length of the line.)
