This is the Multiple Choice Questions Part 1 of the Series in Solid Geometry topic in Engineering Mathematics. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Engineering Mathematics, Mathematics Books, Journals and other Mathematics References.

### Multiple Choice Questions Topic Outline

- MCQs in Polyhedrons | MCQs in Platonic Solids | MCQs in Cube | MCQs in Rectangular Parallelepiped | MCQs in Prism | MCQs in Cylinders | MCQs in Pyramids and Cones | MCQs in Frustum of Pyramids/Cones | MCQs in Prismatoid | MCQs in Sphere | MCQs in Zone | MCQs in Spherical Segment, Spherical Sector, Spherical Pyramid and Spherical Wedge | MCQs in Torus | MCQs in Ellipsoid and Spheroid

### Online Questions and Answers in Solid Geometry Series

Following is the list of multiple choice questions in this brand new series:

**Solid Geometry MCQs**

**MCQs from Number 1 – 50**Answer key:

**PART I**

**MCQs from Number 51 – 100**Answer key:

**PART II**

### Start Practice Exam Test Questions Part I of the Series

**Choose the letter of the best answer in each questions.**

**Problem 1: ME Board October 1991**

A circular piece of cardboard with a diameter of 1 m will be made into a conical hat 40 cm high by cutting a sector off and joining the edges to form a cone. Determine the angle subtended by the sector removed.

- A. 144o
- B. 148o
- C. 152o
- D. 154o

**Problem 2: CE Board November 1994**

What is the area in sq. me of the zone of a spherical segment having a volume of 1470.265 cu. m if the diameter of the sphere is 30 m?

- A. 465.5 m2
- B. 565.5 m2
- C. 665.5 m2
- D. 656.5 m2

**Problem 3: CE Board May 1995**

A sphere having a diameter of 30 cm is cut into 2 segments. The altitude of the first segment is 6 sm. What is the ratio of the area of the second segment to that of the first?

- A. 4:1
- B. 3:1
- C. 2:1
- D. 3:2

**Problem 4: CE Board November 1996**

If the edge of a cube is increased by 30%, by how much is the surface area increased?

- A. 30 %
- B. 33 %
- C. 60 %
- D. 69 %

**Problem 5: ECE Board November 1996**

Each side of a cube is increased by 1%. By what percent is the volume of the cube increased?

- A. 1.21%
- B. 2.8%
- C. 3.03%
- D. 3.5%

**Problem 6: ECE Board November 1992**

Given a sphere of a diameter, d. What is the percentage increase in its diameter when the surface area increases by 21%?

- A. 5%
- B. 10%
- C. 21%
- D. 33%

**Problem 7: ECE Board November 1992**

Given a sphere of a diameter, d. What is the percentage increase in its volume when the surface area increases by 21%?

- A. 5%
- B. 10%
- C. 21%
- D. 33%

**Problem 8: EE Board October 1991**

How many times does the volume of a sphere increases if the radius is doubled?

- A. 4 times
- B. 2 times
- C. 6 times
- D. 8 times

**Problem 9: CE Board May 1997**

A circular having an altitude of 9 m is divided into 2 segments having the same vertex. If the smaller altitude is 6 m, find the ratio of the volume of the small cone to the big cone.

- A. 0.186
- B. 0.296
- C. 0.386
- D. 0.486

**Problem 10: CE Board November 1997**

Find the volume of a cone to be constructed from a sector having a diameter of 72 cm and central angle of 210o.

- A. 12367.2 cm3
- B. 13232.6 cm3
- C. 13503.4 cm3
- D. 14682.5 cm3

**Problem 11: CE Board May 1998**

Find the volume of a cone to be constructed from a sector having a diameter of 72 cm and a central angle of 150o.

- A. 5533.32 cm3
- B. 6622.44 cm3
- C. 7710.82 cm3
- D. 8866.44 cm3

**Problem 12: CE Board November 1996**

A conical vessel has a height of 24 cm and a base diameter of 12 cm. It holds water to a depth of 18 cm above its vertex. Find the volume (in cm3) of its content.

- A. 188.40
- B. 298.40
- C. 381.70
- D. 412.60

**Problem 13: CE Board May 1995**

What is the height of a right circular cone having a slant height of and a base diameter of 2x?

- A. 2x
- B. 3x
- C. 3.317x
- D. 3.162x

**Problem 14: CE Board November 1995**

The ratio of the volume to the lateral area of a right circular cone is 2:1. If the altitude is 15 cm, what is the ratio of the slant height to the radius?

- A. 5:6
- B. 5:4
- C. 5:3
- D. 5:2

**Problem 15: CE Board November 1994**

A regular triangular pyramid has an altitude of 9 m and a volume of 187.06 cu. m. What is the base edge in meters?

- A. 12
- B. 13
- C. 14
- D. 15

**Problem 16: CE Board November 1995**

The volume of the frustum of a regular triangular pyramid is 135 cu. m. The lower base is an equilateral triangle with an edge of 9 m. The upper base is 8 m above the lower base. What is the upper base edge in meters?

- A. 2
- B. 3
- C. 4
- D. 5

**Problem 17: EE Board April 1992**

What is the volume of a frustum of a cone whose upper base is 15 cm in diameter and lower base 10 cm. in diameter with an altitude of 25 cm?

- A. 3018.87 cm3
- B. 3180.87 cm3
- C. 3108.87 cm3
- D. 3081.87 cm3

**Problem 18: EE Board April 1993**

In a portion of an electrical railway cutting, the areas of cross section taken every 50 m are 2556, 2619, 2700, 2610 and 2484 sq. m. Find its volume.

- A. 522,600 m3
- B. 520,500 m3
- C. 540,600 m3
- D. 534,200 m3

**Problem 19: ME Board April 1996**

Determine the volume of a right truncated triangular prism with the following definitions: Let the corners of the triangular base be defined by A, B and C. The length of AB = 10 ft., BC = 9 ft. and CA = 12 ft. The sides A, B and C are perpendicular to the triangular base and have the height of 8.6 ft., 7.1 ft. and 5.5 ft. respectively.

- A. 413 ft3
- B. 311 ft3
- C. 313 ft3
- D. 391 ft3

**Problem 20: CE Board November 1995**

A circular cylinder with a volume of 6.54 cu. m is circumscribed about a right prism whose base is an equilateral triangle of side 1.25 m. What is the altitude of the cylinder in meters?

- A. 3.50
- B. 3.75
- C. 4.00
- D. 4.25

**Problem 21: CE Board May 1996**

A circular cylinder is circumscribed about a right prism having a square base one meter on an edge. The volume of the cylinder is 6.283 cu. m. Find its altitude in meters.

- A. 4.00
- B. 3.75
- C. 3.50
- D. 3.25

**Problem 22: CE Board November 1997**

The bases of a right prism is a hexagon with one of each side equal to 6 cm. The bases are 12 cm apart. What is the volume of the right prism?

- A. 1211.6 cm3
- B. 2211.7 cm3
- C. 1212.5 cm3
- D. 1122.4 cm3

**Problem 23: EE Board April 1996**

Two vertical conical tanks are joined at the vertices by a pipe. Initially the bigger tank is full of water. The pipe valve is open to allow the water to flow to the smaller tank until it is full. At this moment, how deep is the water in the bigger tank? The bigger tank has a diameter of 6 ft and a height of 10 ft, the smaller tank has a diameter of 6 ft and a height of 8 feet. Neglect the volume of water in the pipeline.

**Problem 24:**

The central angle of a spherical wedge is 1 radian. Find its volume if its radius is 1 unit.

- A. 2/3
- B. 1/2
- C. 3/4
- D. 2/5

**Problem 25:**

A regular octahedron has an edge 2m. Find its volume (in m3).

- A. 3.77
- B. 1.88
- C. 3.22
- D. 2.44

**Problem 26: CE Board May 1996**

A mixture compound of equal parts of two liquid, one white and the other black, was placed in a hemispherical bowl. The total depth of the two liquids in 6 inches. After standing for a short time, the mixture separated, the white liquid settling below the black. If the thickness of the segment of the black liquid is 2 inches, find the radius of the bowl in inches.

- A. 7.33
- B. 7.53
- C. 7.73
- D. 7.93

**Problem 27: CE Board November 1996**

The volume of water in a spherical tank having a diameter if 4 m is 5.236 m3. Determine the depth of the water in the tank.

- A. 1.0
- B. 1.2
- C. 1.4
- D. 1.8

**Problem 28:**

An ice cream cone is filled with ice cream and surmounted ice cream in the form of a hemisphere on top of the cone. If the hemispherical surface is equal to the lateral area of the cone, find the total volume (in cubic inches) of ice cream if the radius of the hemisphere is 1 inch and assuming the diameter of hemisphere is equal to the diameter of the cone.

- A. 3.45
- B.
- C. 4.12
- D. 4.25

**Problem 29: ME Board April 1997**

A cubical container that measures 2 inches on a side is tightly packed with 8 marbles and is filled with water. All 8 marbles are in contact with the walls of the container and the adjacent marbles. All of the marbles are of the same size. What is the volume of water in the container?

- A. 0.38 in3
- B. 2.5 in3
- C. 3.8 in3
- D. 4.2 in3

**Problem 30: CE Board May 1997**

The corners of a cubical block touched the closed spherical shell that encloses it. The volume of the box is 2744 cubic cm. What volume in cubic centimeters inside the shell is not occupied by the block?

- A. 2714.56
- B. 3714.65
- C. 4713.56
- D. 4613.74

31. If the edge of a cube is doubled, which of the following is incorrect?

- A. The lateral area will be quadrupled
- B. The volume is increased 8 times
- C. The diagonal is doubled
- D. The weight is doubled

32. The volume of a cube is reduced by how much if all sides are halved?

- A. 1/8
- B. 5/8
- C. 6/8
- D. 7/8

33. Each side of a cube is increased by 1%. By what percent is the volume of the cube increased?

- A. 23.4%
- B. 33.1%
- C. 3%
- D. 34.56%

34. If the edge of a cube is increased by 30%, by how much is the surface area increased?

- A. 67
- B. 69
- C. 63
- D. 65

35. Find the approximate change in the volume of a cube of side x inches caused by increasing its side by 1%.

- A. 0.3×3 cu. in.
- B. 0.1×3 cu. in.
- C. 0.02 cu. in.
- D. 0.03×3 cu. in.

36. A rectangular bin 4 feet long, 3 feet wide, and 2 feet high is solidly packed with bricks whose dimensions are 8 in. by 4 in. by 2 in. The number of bricks in the bin is:

- A. 68
- B. 386
- C. 648
- D. 956

37. Find the total surface area of a cube of side 6 cm.

- A. 214 sq. cm.
- B. 216 sq. cm.
- C. 226 sq. cm.
- D. 236 sq. cm.

38. The space diagonal of a cube is 4√3 m. Find its volume.

- A. 16 cubic meters
- B. 48 cubic meters
- C. 64 cubic meters
- D. 86 cubic meters

39. A reservoir is shaped like a square prism. If the area of its base is 225 sq. cm, how many liters of water will it hold?

- A. 3.375
- B. 3375
- C. 33.75
- D. 3375

40. Find the angle formed by the intersection of a face diagonal t the diagonal of a cube drawn from the same vertex.

- A. 35.26°
- B. 32.56°
- C. 33.69°
- D. 42.23°

41. The space diagonal of a cube (the diagonal joining two non-coplanar vertices) is 6 m. The total surface area of the cube is:

- A. 60
- B. 66
- C. 72
- D. 78

42. The base edge of a regular hexagonal prism is 6 cm and its bases are 12 cm apart. Find its volume in cu. cm.

- A. 1563.45 cm3
- B. 1058.45 cm3
- C. 1896.37 cm3
- D. 1122.37 cm3

43. The base edge of a regular pentagonal prism is 6 cm and its bases are 12 cm apart. Find its volume in cu. cm.

- A. 743.22 cm3
- B. 786.89 cm3
- C. 567.45 cm3
- D. 842.12 cm3

44. The base of a right prism is a hexagon with one side 6 cm long. If the volume of the prism is 450 cc, how far apart are the bases?

- A. 5.74 cm
- B. 3.56 cm
- C. 4.11 cm
- D. 4.81 cm

45. A trough has an open top 0.30 m by 6 m and closed vertical ends which are equilateral triangles 30 cm on each side. It is filled with water to half its depth. Find the volume of the water in cubic meters.

- A. 0.058
- B. 0.046
- C. 0.037
- D. 0.065

46. Determine the volume of a right truncated prism with the following dimensions: Let the corner of the triangular base be defined by A, B, and C. the length AB = 10 feet, BC = 9 feet and CA = 12 feet. The sides at A, B and C are perpendicular to the triangular base and have the height of 8.6 feet, 7.1 feet, and 5.5 feet, respectively.

- A. 413 ft3
- B. 311 ft3
- C. 313 ft3
- D. 391 ft3

47. The volume of a regular tetrahedron of side 5 cm is:

- A. 13.72 cu. cm
- B. 14.73 cu.cm
- C. 15.63 cu. cm
- D. 17.82 cu. cm

48. A regular hexagonal pyramid whose base perimeter is 60 cm has an altitude of 30 cm, the volume of the pyramid is:

- A. 2958 cu. cm.
- B. 2598 cu. cm.
- C. 2859 cu. cm.
- D. 2589 cu. cm.

49. A frustum of a pyramid has an upper base 100 m by 10 m and a lower base of 80 m by 8 m. if the altitude of the frustum is 5 m, find its volume.

- A. 4567.67 cu. m.
- B. 3873.33 cu. m.
- C. 4066.67 cu. m.
- D. 2345.98 cu. m.

50. The altitude of the frustum of a regular rectangular pyramid is 5m the volume is 140 cu. m. and the upper base is 3m by 4m. What are the dimensions of the lower base in m?

- A. 9 x 10
- B. 6 x 8
- C. 4.5 x 6
- D. 7.50 x 10