My College Books

Determine True Shape Of Plane Figure When Projections Are Given BY USING AUXILIARY PLANE METHOD... What will be the problem? Description of final FV & TV will be given. You are supposed to determine the true shape of that plane figure. Follow the below-given steps: Draw the given FV & TV as per the given information in the problem. Then among all lines of FV & TV select a line showing true length (T.L.) (Its other view must be || to XY) Draw x-y perpendicular to this line showing T.L. Project view on x-y (it must be a line view) Draw x-y || to this line view & project new on it. It will be the required answer i.e. True shape. The facts you must know: If you carefully study and observe the solutions of all previous problems, You will find If one view is a line view  & that too parallel to XY line, then and then its other view will show True shape: Now final views are always some shape, not line views, So applying the above method: We first...

Projections Of Planes in this topic various plane figures are the objects. What is usually asked in the problem? To draw the projection means F.V, T.V. & S.V. What will be given in the problem? Description of the plane figure. It's a position with HP  and VP. In which manner it's position with HP & VP will be described? Inclination of its SURFACE with one of the reference plane will be given inclination of one of its EDGES  with another reference  plane will be given (Hence this will be the case of an object inclined to both reference planes.) Study the illustration showing surface &  side inclination given next... Case of rectangle ( projection Of rectangle ) 1 ] Surface parallel to HP  2 ] Surface Inclined to HP 3 ] One small inclined to VP PROCEDURE OF SOLVING THE PROBLEM: IN THREE STEPS EACH PROBLEM CAN BE SOLVED: (As Show in the previous Illustration ) step 1: Assume suitable conditions & draw Fv & Tv of initial position . step 2: Now consid...