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Question (11)

QN0029483

A student unfolds a cylinder by cutting along its height. Which shape is NOT part of its net?

(A) Rectangle
(B) Two circles
(C) Triangle
(D) Circular regions

Correct Answer: C

Explanation:

The net of a cylinder consists of one rectangle and two circles. It does not contain a triangle.

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Question (12)

QN0029484

Which solid has exactly two possible nets?

(A) Cube
(B) Octahedron
(C) Regular tetrahedron
(D) Dodecahedron

Correct Answer: C

Explanation:

A regular tetrahedron has exactly two distinct net structures.

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Question (13)

QN0029485

A cube has 11 distinct nets. An octahedron also has:

(A) 6
(B) 8
(C) 11
(D) 43,380

Correct Answer: C

Explanation:

An octahedron, like a cube, also has 11 distinct nets.

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Question (14)

QN0029486

While finding the shortest path on a cuboid, why is unfolding useful?

(A) It reduces the number of faces.
(B) It converts the surface path into a plane path.
(C) It makes the cuboid smaller.
(D) It changes dimensions.

Correct Answer: B

Explanation:

Unfolding transforms the surface path into a path on a plane, where the shortest path is a straight line.

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Question (15)

QN0029487

The projection of a line on a plane can never be:

(A) Equal to the actual length
(B) Shorter than the actual length
(C) Longer than the actual length
(D) A point

Correct Answer: C

Explanation:

The projection length is always less than or equal to the actual length and can even reduce to a point.

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Question (16)

QN0029488

The projection of a pair of parallel lines on a plane remains:

(A) Intersecting
(B) Parallel
(C) Perpendicular
(D) Coincident

Correct Answer: B

Explanation:

Projection preserves parallelism, so parallel lines remain parallel.

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Question (17)

QN0029489

An engineer draws front, top and side views of an object mainly because:

(A) One view is always inaccurate.
(B) A single projection may correspond to many objects.
(C) Three views are easier to draw.
(D) It reduces drawing time.

Correct Answer: B

Explanation:

A single projection may not uniquely identify an object. Multiple views provide complete information.

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Question (18)

QN0029490

A cube is oriented so that all projected edges are equal in length. This projection is called:

(A) Orthographic projection
(B) Perspective projection
(C) Isometric projection
(D) Side projection

Correct Answer: C

Explanation:

A projection in which all projected edges have equal lengths is called an isometric projection.

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Question (19)

QN0029491

The isometric projection of a transparent cube appears as:

(A) Square
(B) Rectangle
(C) Regular hexagon
(D) Pentagon

Correct Answer: C

Explanation:

In an isometric position, the projection of a transparent cube forms a regular hexagon.

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Question (20)

QN0029492

A shadow cast by sunlight perpendicular to a plane is nearly identical to:

(A) Net of the object
(B) Projection of the object
(C) Surface area of the object
(D) Volume of the object

Correct Answer: B

Explanation:

When sunlight falls perpendicular to a plane, the shadow closely matches the projection of the object.

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Question (11)

A student unfolds a cylinder by cutting along its height. Which shape is NOT part of its net?

Explanation:

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Question (12)

Which solid has exactly two possible nets?

Explanation:

Link:

Question (13)

A cube has 11 distinct nets. An octahedron also has:

Explanation:

Link:

Question (14)

While finding the shortest path on a cuboid, why is unfolding useful?

Explanation:

Link:

Question (15)

The projection of a line on a plane can never be:

Explanation:

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Question (16)

The projection of a pair of parallel lines on a plane remains:

Explanation:

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Question (17)

An engineer draws front, top and side views of an object mainly because:

Explanation:

Link:

Question (18)

A cube is oriented so that all projected edges are equal in length. This projection is called:

Explanation:

Link:

Question (19)

The isometric projection of a transparent cube appears as:

Explanation:

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Question (20)

A shadow cast by sunlight perpendicular to a plane is nearly identical to:

Explanation:

Link:

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