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- When a plane is perpendicular to both th...

Q. |
## When a plane is perpendicular to both the reference planes, its traces are perpendicular to |

A. | xy reference line |

B. | lines on horizontal plane |

C. | lines on vertical plane |

D. | lines on given plane |

Answer» A. xy reference line | |

Explanation: when a plane is perpendicular to both the reference planes, its traces are perpendicular to xy reference line and intersect at xy reference line even when the planes are inclined with both reference planes the traces intersect at xy line. |

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Engineering Graphics

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