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- The line formed by intersection of princ...

Q. |
## The line formed by intersection of principal planes is called |

A. | projection line |

B. | origin line |

C. | line of intersection |

D. | reference line |

Answer» D. reference line | |

Explanation: the line formed by an intersection of principal planes or reference planes of projection that is the vertical plane or frontal plane and horizontal plane is called reference line which is denoted by the letters xy. |

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Engineering Graphics

- An object is kept in one of the quadrants of principal planes of projection, for both the front view and top view of the object the object came first and then the views on planes (the observer is at top right side of principal planes). The object is in which quadrant?
- An object is kept in one of the quadrants of principal planes of projection, for both the front view and top view of the object, the view came first and then the object (the observer is at the top right side of principal planes). The object is in which quadrant?
- An object is kept in one of the quadrants of principal planes of projection, for the front view the view is first and object is next and for top view the object came first and then the view on plane (the observer is at top right side of principal planes). The object is in which quadrant?
- If a line is perpendicular to one of the projection planes and lies on other two planes then the line will lies on reference line accordingly.
- Drawing straight lines on both the surfaces of solids and then pointing the points where they intersect and drawing lines which forms the line of intersection this process of finding the line of intersection is termed as method.
- The line of intersection formed is straight line while two solids are intersecting the solids may be
- The planes parallel to any of the two isometric lines are called planes.
- There will be no change in length if the line is viewed parallel to plane on which the line is present and also if the line is rotated with respect to perpendicular planes.
- The measuring line or the line of heights is the trace or the line of intersection with the picture plane, of the plane containing the point or points whose heights are to be determined.
- A regular cone is placed such that axis is parallel to both reference planes the section plane perpendicular to both reference planes and cuts the cone the section will be like

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