# Engineering Drawing Questions and Answers – Intersection of Surfaces

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This set of Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Intersection of Surfaces”.

1. The surfaces of which intersect one another in lines which are called line of intersection.
a) True
b) False

Explanation: In engineering practice, objects constructed may have constituent parts, the surfaces of which intersect one another in line which are called line of intersection. A dome fitted on a boiler is one such example. The surface of the dome extends up to the line of intersection only.

2. The plane surfaces intersect in a ____________ the line of intersection between two curved surfaces is _________ and between a plane surface and curved surfaces is a _________
a) straight line, curve, curve
b) straight line, straight line, curve
c) straight line, curve, straight line
d) curve, curve, curve

Explanation: The plane surfaces (faces of prisms and pyramids) intersect in a straight line. The line of intersection between two curved surfaces (of cylinders and cones) or between a plane surface and curved surfaces is a curve.

3. 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.
a) assumption
b) line
c) removing material
d) cutting- plane

Explanation: A number of lines are drawn on the lateral surface of one of the solids and in the region of the line of intersection. Points of intersection of these lines with the surface of the other solid are then located. These points will obviously lie on the required line of intersection.
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4. Selecting of a particular plane in a series of planes drawn cutting the solid either parallel, perpendicular or oblique which cut the surface of one of the solids in straight lines and that of the other in straight lines or circles. This is called ________method.
a) assumption
b) line
c) removing material
d) cutting- plane

Explanation: The two solids are assumed to be cut by a series of cutting planes. The cutting planes may be vertical, edgewise or oblique. The cutting planes are so selected as to cut the surface of one of the solids in straight lines and that of the other in straight lines or circle.

5. When a solid completely penetrates another solid, there will be two lines of intersection. These lines are called_____________
a) line of interpenetration
b) concyclic curves of lines
c) hidden lines
d) inside line

Explanation: When a solid completely penetrates another solid, there will be two lines of intersection. These lines are called lines of interpenetration. The portion of the penetrating solid which lies hidden within the other solid is shown by dotted lines.
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6. The line of intersection formed is straight line while two solids are intersecting the solids may be ________
a) prism, cylinder
b) prism, cone
c) pyramid, cone
d) prism, pyramid

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

7. The line of intersection formed is straight line while two solids intersect the solids may be ___________
a) cube, cylinder
b) pentagonal prism, cone
c) triangular pyramid, cone
d) triangular prism, square pyramid

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

8. The line of intersection formed is curve while two solids intersect the solids may be ____________
a) cube, triangular prism
b) pentagonal prism, cone
c) triangular pyramid, cube
d) triangular prism, square pyramid

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

9. The line of intersection formed is curve while two solids intersect the solids may be ____________
a) cone, cylinder
b) cube, prism
c) pyramid, cube
d) pyramid, cuboid

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

10. A prism and cylinder got intersected at 90 degrees the line of intersection will be _________ and parallel to axis of ____________
a) straight line, prism
b) curve, prism
c) straight line, cylinder
d) curve, cylinder

Explanation: As here a prism and cylinder are intersected in which the prism has plane surface and cylinder has curved surface and we know the curved surface is perpendicular to axis of cylinder and also given the solids intersect at 90 degrees so the curve formed will be parallel to axis of a prism.

11. A prism and cone got intersected at 90 degrees the line of intersection will be _________ and parallel to axis of ____________
a) straight line, prism
b) curve, prism
c) straight line, cone
d) curve, cone

Explanation: As here a prism and cone are intersected in which the prism has plane surface and cone has curved surface and we know the curved surface is perpendicular to axis of cone and also given the solids intersect at 90 degrees so the curve formed will be parallel to axis of a prism.

12. The line of intersection formed is straight line while two solids are intersecting the solids may be ___________
a) cube, cylinder
b) prism, cone
c) pyramid, cuboid
d) cube, cone

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

13. The line of intersection formed is curve while two solids are intersecting the solids may be __________
a) cylinder, sphere
b) prism, prism
c) cuboid, cube
d) prism, pyramid

Explanation: If any of the solid in two of intersecting solids is having curves surface that is cylinder, cone, sphere etc the line of intersection will give curve only but not straight line for getting line of intersection straight line both the solids should not have curved surfaces.

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