Which term describes the gradual diminution of width or thickness along the length of an elongated object?

Which term describes the gradual diminution of width or thickness along the length of an elongated object?

• A. Taper
• B. Counter Bore
• C. Cutting Plane Line
• D. Half Section

Answer: (A)

Gradual diminution of width or thickness along the length of an elongated object is called a taper. This describes features that steadily narrow from one end to the other, like a shaft that becomes thinner toward its tip. In engineering drawings, a taper communicates how the cross-section changes along the length, which matters for fit and manufacturing. The other terms refer to different drawing concepts: a counter bore describes a hole with a larger recess for seating a fastener head; a cutting plane line shows where a section is taken to reveal interior features; a half section is a view that combines a cut with an external view. So taper is the term that matches the description.

Gradual diminution of width or thickness along the length of an elongated object is called a taper. This describes features that steadily narrow from one end to the other, like a shaft that becomes thinner toward its tip. In engineering drawings, a taper communicates how the cross-section changes along the length, which matters for fit and manufacturing. The other terms refer to different drawing concepts: a counter bore describes a hole with a larger recess for seating a fastener head; a cutting plane line shows where a section is taken to reveal interior features; a half section is a view that combines a cut with an external view. So taper is the term that matches the description.