# Engineering Drawing Questions and Answers – Problems on Orthographic Projection

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This set of Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Problems on Orthographic Projection”.

1. A regular cone is rested on base on horizontal plane the front view will be _____________
a) circle
b) scalene triangle
c) equilateral triangle
d) isosceles triangle

Explanation: Given the cone is regular cone that means the tip of cone will be at center if viewed from top, so for such a cone the front view will be a triangle and in particular isosceles triangle and the top view will be circle.

2. A Cube is placed on horizontal plane such that one of the space diagonal is perpendicular to horizontal plane the top view will be _____________
a) octagon
b) square
c) hexagon
d) rectangle

Explanation: A cube is a 3 dimensional object whose length, width and thickness will be same and also given space diagonal is perpendicular to horizontal plane the top view, side view and front view will be hexagon only.

3. A cylinder’s axis is perpendicular to profile plane the top view will be ______________
a) circle
b) cylinder
c) rectangle
d) parallelogram

Explanation: Given a cylinder whose axis is perpendicular to a profile plane so the top view and front view will be rectangle and side view will be circle. If the cylinder is slightly tilted with respect to profile then top view and front view will be parallelogram.
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4. An egg is placed vertical to horizontal plane the top view will be ______________
a) ellipse
b) circle
c) oval
d) sphere

Explanation: Given the egg is placed vertical to horizontal plane the front view and side view will be same and it might be conical, oval or elliptical etc. the top view always be circle. That’s why the egg boxes are made impression of semi spheres.

5. A Cardboard is made to cut in shape of ‘A’ and as we placed in projection planes and from top view the legs of cardboard touch the profile plane and cardboard is parallel to horizontal plane. Which of the following is wrong?
a) The front view gives thickness of cardboard
b) The side views give width of cardboard
c) The front view gives height of cardboard
d) The top view gives thickness of cardboard

Explanation: From given information, we can understand that the cardboard is parallel to horizontal plane and direction of ‘A’ placed in projection planes so the front view and side view gives thickness, the front view and top view gives a height of cardboard and side view and top view gives width of cardboard.

6. An object is placed in between projection planes, the front view and side view gives the same rectangle and top view is giving square the object is ________________
a) a square cylinder, such that square base is parallel to horizontal plane
b) a square cylinder, such that square base is parallel to vertical plane
c) a square cylinder, such that square base is parallel to profile plane
d) a square cylinder, such that axis is parallel to horizontal

Explanation: Given that the object is viewing from front and side as rectangle and top view is square so we can understand that pyramid has height more than the side of square and accordingly the view the object can be cuboid (square cylinder).

7. A plate of a negligible thickness of circular shape is placed parallel to horizontal plane the front view will be ____________
a) line
b) circle
c) rectangle
d) ellipse

Explanation: Given a plate which is in circular shape given plate is parallel to horizontal plane so the front view and side views will be line whose length is equal to diameter of circle as the thickness is negligible the front view, side view can’t be rectangle and top view will be circle.

8. A regular tetrahedron is placed on horizontal plane on one of its base, the front view, top view and side view gives triangle.
a) True
b) False

Explanation: A regular tetrahedron is formed by enclosing 4 equal triangles. And given one of the base is parallel to horizontal so in what angle the tetrahedron might be turned the front view and side view will be a triangle.

9. A regular cone is placed on horizontal plane on its base the top view is _____________
a) circle
b) rectangle
c) square
d) triangle

Explanation: A regular cone generally will have a base circle and constant difference in cross-section. When a cone placed on horizontal that is base is parallel to horizontal plane then the front view and side views will show triangle for both and top view will shows circle.

10. The views will change if we keep the object in different quadrants.
a) True
b) False

Explanation: Whenever we change the object from one quadrant to other quadrants the relative positions of projection drawn will change accordingly but the views of the object will not change.

11. A Square pyramid is resting on vertical plane with base parallel to vertical plane. The side view will be _____________
a) triangle
b) polygon with 4 sides
c) square
d) polygon with 5 sides

Explanation: A Square pyramid have base of square which is resting on vertical plane as said above so the side views, top view and bottom view gives the triangle and front view and back view gives square.

12. A triangular prism is placed in projection plane such that the square surface is parallel to horizontal plane. The top view, front view will be __________
a) square, rectangle respectively
b) rectangle, triangle respectively
c) rectangle, rectangle respectively
d) triangle, rectangle respectively

Explanation: Given a triangular prism is placed in projection plane such that the square base is parallel to horizontal plane. A triangular prism is nothing but triangular cylinder as per position given the front view and top view will be rectangle and side view will be triangle.

13. A pentagonal prism is placed the axis is perpendicular to horizontal plane, the top view and front view are ______________
a) pentagon, rectangle
b) rectangle, rectangle
c) pentagon, triangle
d) rectangle, triangle

Explanation: Given a pentagonal prism is placed in projection plane such that the axis is perpendicular to horizontal plane. A pentagonal prism is nothing but pentagonal cylinder as per position given the front view and side view will be rectangle and top view will be pentagon.

14. A regular rhombic bi-pyramid is placed in projection planes such that one of its longest diagonal is perpendicular to vertical plane the front view will be ____________
a) square
b) rhombus
c) triangle
d) rectangle

Explanation: Given a regular rhombic bi-pyramid is placed in projection planes such that one of its longest diagonal is perpendicular to a vertical plane. As per position given the front view and side view will be rhombus and top view will be square.

15. A hexagonal nut is placed on a horizontal plane such that the axis is perpendicular to profile plane. The top view and side view will be _______________
a) rectangle, hexagon
b) hexagon, rectangle
c) rectangle, rectangle
d) rectangle, circle

Explanation: Given a hexagonal nut is placed on horizontal plane such that the axis is perpendicular to profile plane. As per position given the front view, back view, top view and bottom view will be rectangle and side view will be hexagon.

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