MASS Test Spatial Reasoning Principles Questions and Answers

Question 1

An object is represented by the top, front, and right-side orthographic views shown. Which of the 3D options correctly depicts the object? (Image containing the three 2D views and four 3D options would be here)

Accepted Answer

Object C

Answer

Object C is the only 3D representation that matches all three 2D views. The front view shows the L-shape with the sloped surface. The top view correctly shows the rectangular top surface and the hidden lines for the notch below. The right-side view accurately depicts the vertical block with the notch taken out, which is shown with a solid line.

Question 2

The flat pattern shown is folded along the dotted lines to form a cube. Which of the given options shows a possible view of the folded cube? (Image containing a single 2D net and four 3D cube options would be here)

Accepted Answer

Cube D

Answer

When the pattern is folded, the star and the solid circle are on adjacent faces, and the arrow points towards the star. Cube D is the only option that correctly shows this spatial relationship. The other options either place non-adjacent faces next to each other or have the incorrect orientation between the symbols.

Question 3

How many individual blocks are in the stack shown, including any that are completely hidden from view? (Image of a stack of cubes, some hidden, would be here)

Accepted Answer

10

Answer

To find the total, count the blocks in each column. The back-left column is 3 blocks high. The back-right column is 2 blocks high. The middle column is 2 blocks high (one hidden under the top one). The front-left column is 2 blocks high. The front-right block is a single block. The sum is 3 + 2 + 2 + 2 + 1 = 10 blocks.

Question 4

Which of the figures below is a rotation of the original figure and NOT a mirror image? (Image showing one original asymmetrical 3D object and four other 3D objects would be here)

Accepted Answer

Figure B

Answer

Figure B is the only object that can be achieved by rotating the original object in space. Figures A, C, and D are mirror images (or enantiomorphs), meaning their features are reversed as if seen in a mirror, and they cannot be superimposed on the original through rotation alone.

Question 5

When the parts shown are assembled, what will the final object look like? (Image showing three separate interlocking mechanical parts and four assembled options would be here)

Accepted Answer

Assembly D

Answer

Assembly D shows the correct configuration. The keyed shaft (Part 1) slides through the central hole of the mounting plate (Part 2). Then, the gear (Part 3) slides onto the end of the shaft, with its internal keyway aligning with the key on the shaft.

MASS Test Practice Test

MASS Test Practice Test

MASS Test Spatial Reasoning Principles Questions and Answers