Drafting & Design Principles & Techniques Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Drafting & Design Principles & Techniques flashcards as text
Which section view type shows only one quarter of an object removed, typically used for symmetrical parts?
Answer: Quarter section
A quarter section removes one quarter of the object, revealing interior features while retaining three-quarters of the external shape.
What is the primary advantage of using a 'revolved section' rather than a removed section?
Answer: It shows the cross-sectional shape directly on the view without needing a separate view
A revolved section is rotated 90° and drawn directly in place on the view, conveying the cross-sectional shape without requiring a separate drawing area.
In geometric dimensioning and tolerancing (GD&T), what does a circle with a diameter symbol (⌀) inside a feature control frame indicate?
Answer: The tolerance zone is cylindrical
When the diameter symbol precedes a tolerance value in a feature control frame, it specifies that the tolerance zone is a cylinder rather than two parallel planes.
Which drafting technique is used to find the center of a given circle when only an arc is provided?
Answer: Draw two non-parallel chords and construct their perpendicular bisectors; the center is their intersection
Two perpendicular bisectors of any two non-parallel chords of a circle always intersect at the circle's center.
In engineering drawing, a 'datum' is best defined as:
Answer: A theoretically exact point, axis, or plane from which measurements are taken
A datum is an exact geometric reference (point, line, or plane) established from a feature on the part, used as the origin for dimensional measurements.
What does 'scale 1:2' mean on a technical drawing?
Answer: The drawing is half the actual size of the object
A scale of 1:2 means the drawing is half the true size; one unit measured on the drawing represents two units on the actual object.
Which of the following is NOT a standard method for creating a section view?
Answer: Oblique section
An 'oblique section' is not a standard section-view type; standard types include full, half, offset, revolved, removed, and broken-out sections.