Directions: The 3 - D problem figure shows a view of an object. Identify the correct front view, from amongst the answer figures, looking in the direction of arrow.
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Draw the outline of the slab with chamfered top corners, then add the window, the small box at the left foot and the ramp at the right foot as seen from the front.
The object is a thick slab with two chamfered (sloping) top corners and a flat top. A rectangular window passes through the slab. A small box is attached to the front of the wall at its left foot and a ramp (wedge) rises to the wall at its right foot. The arrow looks at the slab straight on from the front. 1. Outline: a flat top with two sloping corners and vertical sides, which all four figures show. 2. Window: it is a square opening through the thickness of the slab. In the 3-D drawing the line seen inside the window is only the lower inner edge of the opening running in the depth direction, so in the front view the window is a plain square with no diagonal. This removes the third figure. 3. Left foot: the box is about one unit wide and just over one unit high, a rectangle at the bottom left. 4. Right foot: the ramp is also about one unit wide and as high as the box; its sloping face is seen as a rectangle at the bottom right. 5. Between the box and the ramp the wall is plain; there is no separate strip or horizontal band. This removes the first and second figures. The fourth figure shows exactly this: chamfered outline, plain square window, a rectangle at each bottom corner and nothing in between. Answer: (4) the fourth answer figure
