Ramsay Test Print Reading and Schematics 2 — Questions and Answers
Question 1: On a mechanical drawing, what does a centerline (a thin line of alternating long and short dashes) indicate?
- The axis of symmetry or center of a circular feature (Correct answer)
- A hidden edge
- A cutting plane
- A dimension boundary
Correct answer: The axis of symmetry or center of a circular feature
Centerlines mark axes of symmetry and the centers of holes, shafts, and arcs.
Question 2: In an electrical schematic, two crossing lines with a solid dot at the intersection represent what?
- A connected junction of wires (Correct answer)
- Wires that cross without connecting
- A resistor
- A ground point
Correct answer: A connected junction of wires
A dot at a wire crossing indicates an electrical connection between those conductors.
Question 3: What is the purpose of a title block on an engineering drawing?
- To provide drawing number, scale, title, and revision information (Correct answer)
- To list the bill of materials only
- To show the assembly sequence
- To indicate tolerances for every dimension
Correct answer: To provide drawing number, scale, title, and revision information
The title block supplies identifying data such as part name, drawing number, scale, and revision.
Question 4: A dimension labeled 'Ø.500' on a print specifies what?
- A diameter of 0.500 inches (Correct answer)
- A radius of 0.500 inches
- An angle of 0.500 degrees
- A thread depth of 0.500 inches
Correct answer: A diameter of 0.500 inches
The Ø symbol denotes diameter, so the feature is 0.500 inches across.
Question 5: In a pneumatic schematic, what does a triangle pointing in the direction of flow typically represent?
- The direction of air or fluid flow (Correct answer)
- A pressure relief valve
- A filter element
- An accumulator
Correct answer: The direction of air or fluid flow
Solid triangles on lines indicate the direction in which the medium flows.
Question 6: Hidden lines on a drawing are shown as what?
- Short evenly spaced dashes (Correct answer)
- Continuous thick lines
- Long-short-long dashes
- Wavy freehand lines
Correct answer: Short evenly spaced dashes
Hidden (invisible) edges behind a surface are drawn with short dashed lines.
Question 7: On a ladder logic diagram, a normally open contact is shown as what?
- Two parallel vertical lines ( -| |- ) (Correct answer)
- Two parallel lines with a diagonal slash ( -|/|- )
- A circle with a coil symbol
- A zigzag line
Correct answer: Two parallel vertical lines ( -| |- )
A normally open contact is drawn as two vertical bars and closes when energized.
Ramsay Test Print Reading and Schematics 2
On a mechanical drawing, what does a centerline (a thin line of alternating long and short dashes) indicate?