Representative Fraction

The ratio of the drawing to the object is called the Representative Fraction. A representative fraction (RF) is the ratio of distance on the map to distance on the ground. Easiest way to calculate RF(Representative Fraction ) in hindi. area of drawing v actual area volume as per drwg. Representative Fraction The scale of a drawing is indicated by a ratio, called the Representative Fraction (RF) or Scale Factor. 0000001550 00000 n startxref 0000002135 00000 n - R.F. When a 1 cm long line in a drawing represents 1 T *��l!ִ���&Facc�TZZX�`(�0����@��Ʀ��[�f'0�$�@M-,w�.gY 6F����A�a���L������0�M|a��. <<07C7FB82A6EAEF478A2F1A442701E4AA>]>> R.F. Importance of Engineering Drawing. v actual volume b dimensions of large objects must be reduced to accommodate on standard size drawing sheet.this reduction creates a scale of that reduction ratio, which is generally a fraction.. such a scale is called reducing scale and that ratio is called representative factor. ; RF = 1: 20,000 RF = 1 Plain scale construction in engineering drawing - Duration: 20:39. %�쏢 16 0 obj C. Graphical scale : Reading engineering drawings requires knowledge of the following elements: Scales; Symbols; Projections; Lines; How to Interpret Scales in Engineering Drawings. :�_�ËtN�'�-%�&���������ۨI��N �ÿq��,:�_�D�+g��h�����bqZ�����b��T蜔��謜�W�endstream stream 0000004348 00000 n 4 If the 10m length is represented as 1 mm on the map then representative fraction is A) 1/100 B) 1/1000 C) 1/10 D) None of these 5 The R.F. 0000018016 00000 n For an in-depth look at both engineering and architectural scales, check out this tutorial on CAD Scale Factors by ArchToolbox. x�b```a``��|��������x$��"l�d�$���!�fɮ|cҽc����ׇ��s7"��c�{�gE��t�2930�1��1��:3;��֙�%|��f�e�G�"�&�6#��q�Ж�© 6X�l+PYKf[l�Q��sbA�� �90]��쒮a� �AF���T��IE = Dimension of an object on sheet / Actual dimension of an object. The actual length of the object / Length of an object in the drawing B. Isometric length of the object / Length of an object in the drawing C. Length of an object in the drawing / Actual length of the object D. Length of an object in the drawing / … So if you plan a route with a total distance of 22cm on the map, that would imply that you'll be traveling (22cm x 500m) / 1cm = 11000m or 11km on the ground. 683 1:50000 can be shown as 1/50000 as well. here the ratio called representative factor is more than unity. P��i������(y������ ����� ��L�7d��В�iI�(Qa`~g�v ���""�20P�1]�5�r�+�S.lڣ�pںE>���0R�{J�8�R[q?�єè�w&�x��; ��! So Engineering drawing is a starting point of all engineering branches such as Mechanical, Production, Civil, Electrical, Electronics, Computer science, Chemical etc. Hence the scale is enlarging scale. Winter – 2014 (Old) 8. Engineering drawing is a graphical language of an engineer to convey one’s ideas most effectively, easily, conveniently and with high speed. %PDF-1.3 There is a ‘Representative fraction’ (RF) and it is defined as? 0000002825 00000 n R.F. The primary problem faced in learning and teaching of engineering drawing is the limited availability of text books that focus on the basic rules and Engineering Drawing is one of the basic courses to study for all engineering disciplines. Ans37:-The ratio of the drawing size of an object to its actual size is called the Representative fraction. These "representative fraction" scales mean that one unit of measurement on the map 1 inch or 1 centimeter represents 10,000 of the same units on the ground. (������8�)5t�Nd�7�rc Representative Factor or Scale Factor = (in same units) Case1: RF will be given directly as a ratio or as a fraction. x��Vێ�0}�W�q�����vѪR[�m�>��"T@/��{;N&�F�}jP��������r)��2}ИWl�^�y�ܳ�FJ�|z��v��n�'���o��K�W��u�S�c��ח�]1=pW���# ��X��M�eh��d[����pF2?���٢N!UK��l�l˃0�+yl�+����G���-`�I��Ή��p�������ƤFY�`F���� ��Ud�7�.�� ��Ơt1�9g�D�M�$�F��}��&cJڀز[����}��ׇ�2��2g�����.*��M�Z�Y������[D��K�|? 9 0 obj Explanation: Representative fraction is the ratio of the length of the object represented on drawing to the actual length of the object represented. 0000001374 00000 n Representative Fraction - The Ratio of length of the drawing to the actual length of the object represented is called Representative Fraction (R.F). Complete Idea of Isometric View and Isometric Projection. use following formulas for the calculations in this topic. .

When a 1 cm long line in a drawing represents 1 metre length of the object,

2) Using a scale, you will be able to measure objects shown on civil engineering plans and architectural 598 72 108 120 150 ‘Representative fraction’ (RF) is defined as. The actual length of the object / Length of an object in the drawing B. Isometric length of the object / Length of an object in the drawing C. Length of an object in the drawing / Actual length of the object D. Length of an object in the drawing / … B. The units will be listed on the map, such as 1 inch or 1 centimeter. stream 0000011920 00000 n There is a ‘Representative fraction’ (RF) and it is defined as? of scale is always A) Less than 1 B) Equal to 1 C) Greater than 1 D) Any of these 6 The unit of R.F. •A plain scale consists of a line divided into suitable number of equal units. is 1/5000 or 1: 5000.

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