Perpendicular to both principal planes, parallel to one of the principal planes and inclined to one of the principal planes, perpendicular to other and inclined to both principal planes. Determination of true length and true inclinations of straight lines from the projections not involving traces projection of plane surfaces like rectangle, square, pentagon, hexagon, circle surfaces. The line is kept inclined at 400 to hp and parallel to vp. Projections of straight line when inclined to both hp and.
The following are the important positions which a straight line can take with respect to two reference planes. Notations used for straight line true length of the line. A straight line pq 80 mm long appears to be of length 50 mm and inclined at 30 0 to xy line in its side view. The simplest position a straight line occupies in a space is, it is parallel to both v. Line inclined to both hp and vp problem 1 a line cd measuring 80mm is inclined at an angle of 30 to hp and 45 to vp. A line pq 75mm long has its end p in both hp and vp. A point t lies on a line p if its horizontal projection lies on the horizontal projection of the. True length and inclination of lines with reference plane. Inclined plane sketch projection solidworks forums. Hence, in monges projection, a straight line is represented by a pair of projections p,p. Projections of straight lines inclined to both the. The end point p of line pq is 10 mm above the hp and its vt is 10 mm below. Multi choice questions darshan institute of engineering.
Straight lines inclined to both of the reference planes. The above position resulting in straight line as a top view and front view. Engineering drawing basic interview question and answers. The top view is a line inclined at an angle to xy line. A straight line pq inclined at 40 0 to vp has pq 60 mm and pq 50 mm. Draw the projections of the following straight lines.
Orthogonal projection of a straight line if a straight line p is not a ray of projection not perpendicular to either projection plane, then its horizontal and vertical projections are lines p and p. Projection of line inclined to both the planes now combining the above two, we conclude that when line is inclined to both the planes. Tips for projection of straight linesiiinclined to both planes your suggestions for my engineering graphics made easy book. The shortest distance between any two points is called a straight line. Draw the projection of line ab and find its true length and inclinations with the hp. A straight line pq is 100 mm long and makes an angle of 55 o to the hp and 35 o to the vp. Tips for projection of straight linesiiinclined to both.
Revolving or moving straight lines in different ways obtains these surfaces. Sheet no4 projection of straight linesii a given line may be inclined to both the reference planes i. Notice that the surface a appears as a line in the front orthographic view. Determination of true lengths and true inclinations by rotating line method yes 12. Thus a straight line is the basic conceptual figure using which any object like a machine component or a structural element is represented. Inclination of one of its edges with other reference plane will be given hence this will be a case of an object inclined to both reference planes. Surface a is perpendicular to the frontal projection plane. Draw an arc of radius 20 mm tangent to two given lines inclined at a 600, b 900, and c. Parallel to one plane and perpendicular to the other. Line inclined to one plane and parallel to the other exercises xa 105.
Projection of straight lines in engineering graphics pdf. Watch this video which explain the projections of points. Pdf engineering graphics lab manual free download pdf. Projections of straight lines ppt, engineering drawing. Problem is still that the projection is normal to the newprojected plane.
Projections of straight lines inclined to one or both of the reference planes pdf. Lecture 12 projection of line inclined to both the plane. Engineering graphics projections of a straight line. Projections of such planes are drawn in three stages. Assignments problems for practical sheets prasad vijay kane. The planes which are inclined to both the reference planes i. Draw the projections of the line if it is parallel to the vp and inclined at 30 to the hp. Co 1 draw the projection of points and lines located in different quadrants. Here is an example problem for drawing the orthographic views for a straight line when inclined to both principal planes. Projection of straight lines, situated in first quadrant only, inclined to both horizontal and vertical planes location of traces only. Projection of planes introduction no t1, t2 chapter 2 r2 14.
Pdf this book includes practice problems for engineering drawing course. Assume the line to be located in each of the four quadrants by turns. Tips for projection of straight lines ii inclined to both planes your suggestions for my engineering graphics made easy book. Engineering graphics slidespresentationsppt for ktu. Location of a line the location of a line in projection quadrants is described by specifying the distances of its end points from the vp, hp and pp. Learn vocabulary, terms, and more with flashcards, games, and other study tools. It is at an angle inclined to the horizontal and profile planes and therefore it appears foreshortened in the top and side views. The lines in which the planes meet the reference planes i. Introduction line parallel to one or both the planes 102. Inclination of its surface with one of the reference planes will be given. This document is highly rated by mechanical engineering students and. Lecture 12 projection of line inclined to both the plane free download as powerpoint presentation. Projection of simple solids, cylinders, cones, parallelepiped pyramids in. Here planes are inclined to both the reference planes.
Line inclined to one plane and parallel to the other plane. Line perpendicular to one plane and parallel to the other. The end p is both in hp and vp, and 40 mm to the right of lpp. I found a work arround using 3d sketching to drop lines from the end points along the y axis and then setting up a pierce constraint at the inclined plane using a spline approximationthrough points. Projections of straight lines inclined to both the reference planes. Draw its projections when its end point p is 15 mm above the hp and 60 mm in front of vp. Pdf ge8152 engineering graphics lecture notes, books. A straight line ab of 40 mm length has one of its ends a, at 10 mm from the hp and 15 mm from the vp. Thus projection of a straight line is the foundation of engineering drawing. Engineering graphics getting started, points, lines tips for section of. Chapter on computer aided drafting cadr is entirely rewritten with inclusion of 50 projections of planes. Ab100 mm, means that true length of the line is 100 mm.
May 11, 2020 projections of straight lines ppt, engineering drawing, semester mechanical engineering notes edurev is made by best teachers of mechanical engineering. This document is highly rated by mechanical engineering students and has been viewed 3294 times. Projections of straight lines inclined to one of the reference planes. In such cases, length of line and its inclination with hp and vp may be given. For any other position first assume the given line parallel to both the planes.
Bis code of practice for general engineering drawing. A straight line ab of 40 mm length is parallel to the hp and inclined at 30 to. Straight line locus of a point, which moves linearly the shortest distance between any two given points. Well be positioning this line in different ways that is it may be parallel or inclined to either or both the reference planes hpvp and then draw its orthographic projection aka front and top. Projection of lines 9th lect line inclined to both the planes duration. Ge8152 syllabus engineering graphics regulation 2017 anna. Projection of straight lines only first angle projections inclined to both the principal planes determination of true lengths and true inclinations by rotating line method and traces projection of planes polygonal and circular surfaces inclined to both the principal planes by rotating object method. Projection of straight lines inclined to both the principal planes yes 11. Projection of lines inclined to both the reference planes, projections of a line when true length, true inclinations and position of one end is given, to determine the true length and true inclination of a line when its projections are given, trapezoid method to determine true length and inclinations. Find the shortest distance between the straight line ab and the line of intersection of planes of projection.
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