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Unit 5 - Practice Quiz

MEC136

1 In an isometric view, what is the angle between any two principal axes?

A. 90 degrees
B. 120 degrees
C. 180 degrees
D. 45 degrees

2 What is the angle of inclination of the isometric axes with the horizontal line?

A. 15 degrees
B. 30 degrees
C. 45 degrees
D. 60 degrees

3 Which of the following represents the ratio of isometric length to true length?

A. 0.5
B. 0.707
C. 0.816
D. 1.0

4 What is the difference between an Isometric View and an Isometric Projection?

A. View uses reduced scale; Projection uses true scale
B. View uses true scale; Projection uses reduced scale
C. Both use true scale
D. Both use reduced scale

5 Lines in an isometric drawing that are not parallel to the isometric axes are called:

A. Principal lines
B. Isometric lines
C. Non-isometric lines
D. Hidden lines

6 A square plane, when drawn in isometric view, appears as a:

A. Square
B. Rectangle
C. Rhombus
D. Trapezoid

7 Which geometric shape does a circle appear as in an isometric view?

A. Circle
B. Ellipse
C. Parabola
D. Hyperbola

8 Which method is commonly used to draw isometric circles (ellipses) manually?

A. Two-center method
B. Three-center method
C. Four-center method
D. Concentric circle method

9 In the isometric view of a cube, how many faces are visible?

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

10 When drawing a pyramid in isometric view, the axis of the pyramid is usually:

A. Parallel to the 30-degree lines
B. Vertical
C. Horizontal
D. Inclined at 45 degrees

11 The 'Box Method' in isometric drawing is primarily used for:

A. Drawing circles only
B. Enclosing irregular objects in a rectangular prism
C. Dimensioning
D. Drawing shadows

12 In the isometric projection of a sphere, the outline of the sphere appears as a:

A. Circle of reduced diameter
B. Circle of true diameter
C. Ellipse
D. Oval

13 When placing one object centrally on top of another in isometric view (e.g., a pyramid on a prism), what must be aligned?

A. The base corners
B. The geometric centers of the mating surfaces
C. The back edges
D. The front edges

14 Which AutoCAD function key is used to toggle the Isoplane?

A. F2
B. F5
C. F8
D. F10

15 In AutoCAD, to draw a circle in isometric mode, which command sequence is correct?

A. CIRCLE command
B. ELLIPSE command > Isocircle option
C. ARC command
D. POLYGON command

16 When dimensioning an isometric drawing, dimension lines should be drawn:

A. Horizontally
B. Vertically
C. Parallel to the object line being measured
D. Perpendicular to the object line

17 In isometric dimensioning, extension lines are drawn:

A. Perpendicular to the dimension line
B. As continuations of the object lines
C. Horizontal always
D. Vertical always

18 What is the correct orientation of text in isometric dimensioning?

A. Horizontal
B. Vertical
C. Aligned with the dimension line and strictly isometric
D. Any angle

19 In AutoCAD 3D modeling, what does UCS stand for?

A. Universal Coordinate System
B. User Coordinate System
C. Uniform Control Set
D. United CAD Standard

20 The AutoCAD command to rotate the UCS using 3 points is commonly known as:

A. UCS > 3 Point
B. ROTATE3D
C. 3DORBIT
D. UCS > World

21 Which rule is used to determine the positive direction of the Z-axis in AutoCAD?

A. Left Hand Rule
B. Right Hand Rule
C. Screw Rule
D. Thumb Rule

22 Which AutoCAD command converts a 2D closed profile into a 3D solid by adding height?

A. REVOLVE
B. EXTRUDE
C. UNION
D. SLICE

23 To use the EXTRUDE command on a set of lines, the lines must first be:

A. Grouped
B. Joined into a Polyline or Region
C. Exploded
D. Dashed

24 Which command creates a 3D solid by sweeping a 2D object around an axis?

A. EXTRUDE
B. SWEEP
C. REVOLVE
D. LOFT

25 What is the default angle of revolution in the REVOLVE command?

A. 90 degrees
B. 180 degrees
C. 270 degrees
D. 360 degrees

26 The AutoCAD command 'PRESSPULL' differs from 'EXTRUDE' mainly because:

A. It only works on circles
B. It automatically detects bounded areas without creating a region
C. It cannot create holes
D. It creates 2D objects

27 Which visual style shows the object with shading and smooth edges but no material textures?

A. 2D Wireframe
B. Hidden
C. Conceptual
D. X-Ray

28 When defining a 3-Point UCS, the first point selected defines the:

A. Direction of X-axis
B. Direction of Y-axis
C. Origin (0,0,0)
D. Z-axis

29 Which command combines two or more 3D solids into a single solid?

A. SUBTRACT
B. INTERSECT
C. UNION
D. JOIN

30 To create a hole in a 3D block using the SUBTRACT command, which object do you select first?

A. The object to be removed (the hole shape)
B. The object to keep (the main block)
C. Both at the same time
D. It does not matter

31 What is the purpose of the 'Region' command in AutoCAD 3D modeling?

A. To create a 2D area from a closed loop
B. To delete objects
C. To measure area
D. To create a viewport

32 Which command allows you to rotate the view of your 3D model freely in real-time?

A. PAN
B. ZOOM
C. 3DORBIT
D. MOVE

33 When using the EXTRUDE command, what does the 'Taper Angle' option do?

A. Twists the object
B. Slopes the sides of the extrusion
C. Changes the height
D. Rotates the object

34 Which of the following is NOT a standard 3D primitive shape in AutoCAD?

A. Box
B. Cylinder
C. Pyramid
D. Trapezoid

35 In isometric drawings, hidden lines are generally:

A. Shown as dashed lines
B. Shown as solid lines
C. Omitted unless absolutely necessary for clarity
D. Shown in red

36 Which 3D operation creates a solid from the overlapping volume of two or more solids?

A. UNION
B. SUBTRACT
C. INTERSECT
D. EXTRUDE

37 What is the World Coordinate System (WCS)?

A. A temporary coordinate system
B. The fixed, immutable coordinate system of the drawing file
C. A user-defined system
D. A system for printing only

38 How can you select a sub-object (like a face or edge) of a 3D solid in AutoCAD?

A. Double click
B. Hold Ctrl key and click
C. Hold Shift key and click
D. Right click

39 What is the function of the 'ViewCube' in AutoCAD?

A. To draw cubes
B. To calculate volume
C. To switch between standard views and isometric views
D. To scale objects

40 When drawing a hexagonal prism in isometric, the hexagon is usually drawn inside a:

A. Circle
B. Triangle
C. Rectangle/Box
D. Larger Hexagon

41 An isometric scale is constructed by drawing lines at what angles to a horizontal line?

A. 15 and 30 degrees
B. 30 and 45 degrees
C. 15 and 45 degrees
D. 30 and 60 degrees

42 Which command creates a 3D solid wall-like object with a specified height and width along a path?

A. WALL
B. POLYSOLID
C. EXTRUDE
D. OFFSET

43 If you extrude a circle, what shape is produced?

A. Cone
B. Sphere
C. Cylinder
D. Torus

44 If you revolve a right-angled triangle 360 degrees around its perpendicular height, what shape is produced?

A. Cylinder
B. Sphere
C. Cone
D. Pyramid

45 What does the 'Dynamic UCS' (F6) feature do?

A. It rotates the view automatically
B. It automatically aligns the UCS to the face under the cursor
C. It scales the drawing
D. It hides the UCS icon

46 In an isometric view of a frustum of a square pyramid, the top and bottom faces are:

A. Parallel Rhombuses
B. Parallel Rectangles
C. Non-parallel Trapezoids
D. Perpendicular Squares

47 Which tool is used to move, rotate, or scale 3D objects along a specific axis visually?

A. 3D Gizmo
B. Pan
C. Orbit
D. Steering Wheel

48 To draw a 'Cone' in AutoCAD 3D, what are the two primary inputs required?

A. Base radius and Height
B. Base radius and Slant height
C. Diameter and Circumference
D. Volume and Density

49 The command used to slice a 3D solid with a plane is:

A. CUT
B. SPLIT
C. SLICE
D. SECTION

50 What is the appearance of the Letter 'H' on the top face of a cube in isometric view?

A. Distorted/Skewed
B. Normal
C. Inverted
D. Mirrored