NTS PSO Question and Ans for Tech at metropolitan academy Karachi on dated 3rd October 2015…

Q & A With summary

1. There are _______ principal views of an orthographic projection?

Ans: In orthographic projection there are 6 principle views of an object, front, top, L side, R side, rear, and back views. The three most commonly views drawn on a technical drawing are the front, back, and side views most other views are not needed. Other views may be needed in order for the person who is creating the Part, to better visualize it in order to properly manufacture it. A well viewed

2. Represent axes of symmetry and are important for interpreting cylindrical shapes.ANS: enter lines: Center lines represent axes of symmetry and are important for interpreting cylindrical shapes.

ANS: Using Center Lines Center lines represent axes of symmetry. They are important for interpreting cylindrical shapes.

3. Section lines are used to showSection lines

Section lines are used to show areas that have been cut by the cutting plane. Section lines are grouped in parallel line patterns and usually drawn at a

45o angle. The line type is usually continuous and the line weight is thin (0.3 mm).

4._____ is used to show the true shape of features that are not parallel to any of the principles plains of projections.

ANS: AUXILIARY VIEWS Auxiliary views are used to show the true shape of features that are not parallel to any of the principle planes of projection. Auxiliary

5.the isometric projection of An object is a one plane view drawn with the object so placed with respect to the plane of projection that are the three principle axes appears to be inclined to each other at an equal angle of ?

ANS: In isometric projection the angles between the projection of the axes are equal i.e. 120º

Q.6: (pyramid) are the solids with a base and slant triangular faces

Ans pyramid

Q-7.----Is the distance between the corresponding points0 the adjacent threads measured parallel to the axis