Which of the following compass is used to scribe a circle or an a

Which of the following compass is used to scribe a circle or an a
| Which of the following compass is used to scribe a circle or an arc with a large diameter?

A. Trammel compass

B. Ordinary compass

C. Wing compass

D. Spring compass

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

Concept:

Trammel compass

  • It is used to draw large circles or arcs that are beyond the limit of the dividers
  • It consists of a bar with two movable heads

 

Wing compass
  • Parts of the wing compass are shown in Figure.
  • The legs of the wing compass are hinged at the top or joined with spring and forced open or closed by turning a knurled knob that attaches to a threaded post spanning the legs.
Spring Compass
  • The spring compass is used to draw circles and small arcs of 25 mm radii.
  • The screw and nut arrangement is used to set the radius accurately

  • When using spring type wing compass the measurement once taken will not vary while marking.
  • The two legs of the compass should always be equal in length. 
  • The compass is specified by the type of joints and length.

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