1The term 'Orthographic' is derived from the words 'Ortho' and 'Graphos'. What does 'Ortho' mean?
A.Straight
B.Right Angle
C.Draw
D.Parallel
Correct Answer: Right Angle
Explanation:Ortho means 'Right Angle' and Graphos means 'Drawing'. Therefore, Orthographic projection is a right-angled projection.
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2In orthographic projection, the projectors are assumed to be __ to the plane of projection.
A.Parallel
B.Inclined at
C.Perpendicular
D.Oblique
Correct Answer: Perpendicular
Explanation:The fundamental principle of orthographic projection is that the lines of sight (projectors) are perpendicular (at ) to the projection plane.
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3In the First Angle Projection system, the object is positioned:
A.Between the observer and the plane of projection
B.Behind the plane of projection
C.Between the plane of projection and the ground
D.Such that the plane is between the observer and the object
Correct Answer: Between the observer and the plane of projection
Explanation:In First Angle Projection, the object is situated in the first quadrant, placing it between the observer and the plane of projection.
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4In the Third Angle Projection system, the projection plane is assumed to be:
A.Opaque
B.Transparent
C.Reflective
D.Absorbent
Correct Answer: Transparent
Explanation:In Third Angle Projection, the plane of projection is between the observer and the object. To see the object, the plane is assumed to be transparent (like a glass box).
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5In First Angle Projection, where is the Top View drawn relative to the Front View?
A.Above the Front View
B.Below the Front View
C.To the left of the Front View
D.To the right of the Front View
Correct Answer: Below the Front View
Explanation:In the First Angle system, the Horizontal Plane (HP) is rotated clockwise. This moves the Top View projection to a position below the XY reference line, under the Front View.
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6In Third Angle Projection, where is the Top View drawn relative to the Front View?
A.Above the Front View
B.Below the Front View
C.To the left of the Front View
D.To the right of the Front View
Correct Answer: Above the Front View
Explanation:In the Third Angle system, rotating the Horizontal Plane clockwise places the Top View above the XY reference line, over the Front View.
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7The view obtained on the Vertical Plane (VP) is commonly known as the:
A.Top View (Plan)
B.Front View (Elevation)
C.Side View (Profile)
D.Bottom View
Correct Answer: Front View (Elevation)
Explanation:The projection on the Vertical Plane is the Front View, also referred to as the Elevation.
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8Which projection system is widely used in the United States?
A.First Angle Projection
B.Second Angle Projection
C.Third Angle Projection
D.Fourth Angle Projection
Correct Answer: Third Angle Projection
Explanation:The Third Angle Projection system is the standard convention used in the United States, whereas First Angle is standard in India and Europe.
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9Why are the Second and Fourth Angle projection systems generally not used?
A.They are too difficult to draw
B.The views overlap when the planes are rotated
C.AutoCAD does not support them
D.They require 3D modeling
Correct Answer: The views overlap when the planes are rotated
Explanation:In the 2nd and 4th quadrants, rotating the Horizontal Plane clockwise causes the VP and HP to overlap, confusing the Top and Front views.
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10The symbol for First Angle Projection consists of two concentric circles and:
A.A rectangle on the left
B.A frustum of a cone to the left
C.A frustum of a cone to the right
D.A square below
Correct Answer: A frustum of a cone to the right
Explanation:The standard symbol shows two concentric circles (representing the end view of a cone) and a trapezoid (representing the side view of the frustum). In First Angle, the frustum is usually drawn to the right of the circles.
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11Which line type is used to represent edges of an object that are not visible from the viewing direction?
A.Continuous thick line
B.Chain thin line
C.Dashed thin line (Hidden)
D.Zig-zag line
Correct Answer: Dashed thin line (Hidden)
Explanation:Hidden lines (dashed thin lines) represent features that are physically present but obscured by other parts of the object.
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12A 'Center Line' in technical drawing is represented by:
A.Continuous thin line
B.Short dashes only
C.Long dash dotted chain line
D.Continuous thick line
Correct Answer: Long dash dotted chain line
Explanation:Center lines are drawn as a chain of long dashes and dots (long-short-long).
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13In AutoCAD, which command is used to load a specific line type (e.g., Hidden or Center) if it is not currently available in the drawing?
A.LOADLINE
B.LINETYPE
C.LINEWEIGHT
D.LTSCALE
Correct Answer: LINETYPE
Explanation:The LINETYPE command opens the Linetype Manager, allowing users to load definitions from the .lin library file.
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14Which AutoCAD command controls the global scale factor of linetypes (e.g., changing the spacing of dashes in a hidden line)?
A.SCALE
B.ZOOM
C.LTSCALE
D.PSLTSCALE
Correct Answer: LTSCALE
Explanation:LTSCALE (Line Type Scale) sets the global scale factor that applies to all linetypes in the drawing.
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15When drawing orthographic projections in AutoCAD, which mode ensures lines are drawn perfectly horizontal or vertical?
A.Grid Mode (F7)
B.Snap Mode (F9)
C.Ortho Mode (F8)
D.Polar Tracking (F10)
Correct Answer: Ortho Mode (F8)
Explanation:Ortho Mode restricts cursor movement to the horizontal and vertical axes.
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16Which AutoCAD command allows you to relocate an object from one point to another without changing its orientation or size?
A.COPY
B.MOVE
C.PAN
D.OFFSET
Correct Answer: MOVE
Explanation:The MOVE command displaces objects a specified distance in a specified direction.
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17What is the primary difference between the COPY and MOVE commands?
A.MOVE changes the size, COPY does not
B.COPY leaves the original object intact, MOVE does not
C.COPY allows rotation, MOVE does not
D.There is no difference
Correct Answer: COPY leaves the original object intact, MOVE does not
Explanation:COPY creates duplicates while retaining the original; MOVE changes the position of the original object.
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18When using the ROTATE command in AutoCAD, what is the 'Base Point'?
A.The center of the screen
B.The point around which the object will rotate
C.The endpoint of the object
D.The coordinate
Correct Answer: The point around which the object will rotate
Explanation:The base point acts as the pivot point or axis of rotation for the selected objects.
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19By default, the ROTATE command rotates objects in which direction for positive angle values?
A.Clockwise
B.Counter-Clockwise
C.Vertically
D.Horizontally
Correct Answer: Counter-Clockwise
Explanation:In AutoCAD's standard coordinate system, positive angles are measured counter-clockwise from the positive X-axis.
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20Which command is used to remove a portion of a line that falls between two intersecting edges?
A.ERASE
B.DELETE
C.TRIM
D.BREAK
Correct Answer: TRIM
Explanation:The TRIM command cuts objects to meet the edges of other objects (cutting edges).
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21To use the TRIM command, you generally need to select:
A.Only the object to be removed
B.Cutting edges first, then the object to trim
C.A center point
D.A base point
Correct Answer: Cutting edges first, then the object to trim
Explanation:Standard usage involves defining the boundary (cutting edge) first, though modern AutoCAD versions act on implicit boundaries.
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22Which command is the opposite of TRIM, used to lengthen a line to meet a boundary edge?
A.STRETCH
B.LENGTHEN
C.EXTEND
D.SCALE
Correct Answer: EXTEND
Explanation:While EXTEND is the functional opposite, TRIM can also be shifted to Extend mode by holding 'Shift' during the command.
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23The ERASE command is used to:
A.Remove part of a line
B.Delete entire selected objects
C.Clean the screen visually
D.Undo the last action
Correct Answer: Delete entire selected objects
Explanation:ERASE removes the selected entities entirely from the drawing database.
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24When using the MIRROR command, you must define:
A.A center point
B.A mirror line (axis of reflection)
C.A rotation angle
D.A scale factor
Correct Answer: A mirror line (axis of reflection)
Explanation:MIRROR creates a reverse copy of an object across a user-defined axis (mirror line) specified by two points.
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25In the MIRROR command, what happens if you answer 'Yes' to 'Erase source objects?'
A.The command is cancelled
B.A copy is created and the original is kept
C.The original object is deleted, effectively flipping the object
D.The text in the object is reversed
Correct Answer: The original object is deleted, effectively flipping the object
Explanation:Answering 'Yes' deletes the original, resulting in a flip rather than a duplication.
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26What system variable controls whether text is reversed when using the MIRROR command?
A.TEXTMIRROR
B.MIRRTEXT
C.TEXTSTYLE
D.MIRRORMODE
Correct Answer: MIRRTEXT
Explanation:If MIRRTEXT is set to 1, text is mirrored (reversed). If set to 0 (default), text retains its reading direction.
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27The SCALE command changes the size of an object. A scale factor of $0.5$ will:
A.Double the size
B.Reduce the size to half
C.Increase the size by 50%
D.Rotate the object
Correct Answer: Reduce the size to half
Explanation:A scale factor less than 1 reduces the size. $0.5$ represents of the original size.
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28In the SCALE command, the 'Reference' option is used to:
A.Scale the object based on a known existing length and a new desired length
B.Look up the scale in a table
C.Scale the text only
D.Move the object while scaling
Correct Answer: Scale the object based on a known existing length and a new desired length
Explanation:Reference scaling allows precise resizing by specifying a current length and then the new target length.
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29Which command connects two lines with a smoothly fitted arc (rounded corner)?
A.CHAMFER
B.FILLET
C.BLEND
D.JOIN
Correct Answer: FILLET
Explanation:FILLET rounds the edges of two 2D objects or the adjacent faces of a 3D solid.
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30If you apply the FILLET command with a Radius of $0$, what is the result?
A.The command fails
B.It creates a sharp corner where the lines intersect
C.It creates a circle
D.It trims the lines completely
Correct Answer: It creates a sharp corner where the lines intersect
Explanation:A fillet radius of 0 is a common technique to trim or extend two lines to form a sharp corner.
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31Which command creates a beveled corner (angled line) between two intersecting lines?
A.FILLET
B.CHAMFER
C.TRIM
D.BREAK
Correct Answer: CHAMFER
Explanation:CHAMFER connects two non-parallel objects by extending or trimming them to intersect or to join with a beveled line.
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32In the CHAMFER command, the 'Distance' method requires inputting:
A.One angle and one length
B.Two chamfer distances (one for each line)
C.The radius of the corner
D.The arc length
Correct Answer: Two chamfer distances (one for each line)
Explanation:The Distance method requires the user to specify how far back to trim the first line and how far back to trim the second line.
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33Which command creates multiple copies of objects in a pattern?
A.COPY
B.MIRROR
C.ARRAY
D.OFFSET
Correct Answer: ARRAY
Explanation:ARRAY creates copies of objects arranged in a Rectangular, Polar (circular), or Path pattern.
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34In a Rectangular Array, the pattern is defined by:
A.Center point and angle
B.Rows and Columns
C.Path curve
D.Radius and circumference
Correct Answer: Rows and Columns
Explanation:Rectangular arrays arrange copies in a grid pattern defined by the number of horizontal rows and vertical columns.
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35In a Polar Array, objects are copied:
A.Along a straight line
B.In a grid
C.Circularly around a center point
D.Along a spline path
Correct Answer: Circularly around a center point
Explanation:Polar arrays distribute copies around a specified center point.
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36When creating a Polar Array, the 'Fill Angle' of means:
A.The objects will rotate individually
B.The pattern will cover a full circle
C.The pattern will only cover a semicircle
D.The array is rectangular
Correct Answer: The pattern will cover a full circle
Explanation:The fill angle determines how far around the center point the items are distributed. is a full circle.
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37What is the keyboard shortcut for the MOVE command?
A.MO
B.M
C.MV
D.MOV
Correct Answer: M
Explanation:M is the standard alias for the MOVE command in AutoCAD.
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38What is the keyboard shortcut for the TRIM command?
A.T
B.TI
C.TR
D.TM
Correct Answer: TR
Explanation:TR is the standard alias for the TRIM command.
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39What is the keyboard shortcut for the COPY command?
A.C
B.CO or CP
C.CY
D.CC
Correct Answer: CO or CP
Explanation:CO (and CP) are the aliases for COPY. 'C' is usually reserved for CIRCLE.
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40If a line is perpendicular to the Vertical Plane (VP) and parallel to the Horizontal Plane (HP), its Front View will appear as:
A.A true length line
B.A point
C.A shortened line
D.An inclined line
Correct Answer: A point
Explanation:Since the line goes straight into the VP, looking from the front, you only see the end of the line, which appears as a point.
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41If a surface is parallel to the Horizontal Plane, its Top View will be:
A.A straight line
B.True shape and size
C.Foreshortened shape
D.A point
Correct Answer: True shape and size
Explanation:When a plane/surface is parallel to a projection plane, its projection on that plane reflects its true shape and dimensions.
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42The intersection of the Horizontal Plane (HP) and the Vertical Plane (VP) is called the:
A.Profile Line
B.Ground Line (or Reference Line XY)
C.Trace Line
D.Projector
Correct Answer: Ground Line (or Reference Line XY)
Explanation:The intersection of the principal planes (HP and VP) creates the reference line, typically labeled XY.
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43Which view gives the details of the object's height and width?
A.Top View
B.Front View
C.Side View
D.Bottom View
Correct Answer: Front View
Explanation:The Front View shows the Length (Width) and Height. The Top view shows Length and Depth (Thickness).
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44In AutoCAD, to select multiple objects for the ERASE command using a 'Crossing Selection' (Green window), you must drag the cursor from:
A.Left to Right
B.Right to Left
C.Top to Bottom only
D.Bottom to Top only
Correct Answer: Right to Left
Explanation:Dragging Right to Left creates a Crossing selection (Green), which selects anything the window touches. Left to Right creates a Window selection (Blue), which selects only objects fully inside.
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45When projecting a Side View in First Angle Projection, where is the Left Side View placed?
A.To the left of the Front View
B.To the right of the Front View
C.Above the Front View
D.Below the Front View
Correct Answer: To the right of the Front View
Explanation:In First Angle Projection, the view is projected onto the plane behind the object. The Left Side View is projected onto the Profile Plane on the right side.
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46What is the precedence of lines if a Visible line and a Hidden line coincide?
A.Hidden line takes precedence
B.Visible line takes precedence
C.Center line takes precedence
D.Both are drawn side by side
Correct Answer: Visible line takes precedence
Explanation:According to drafting standards, visible lines cover hidden lines, and hidden lines cover center lines.
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47In the ARRAY command, making an array 'Associative' means:
A.The items are independent blocks
B.The items remain linked and can be edited as a group
C.The items are exploded immediately
D.The array cannot be modified
Correct Answer: The items remain linked and can be edited as a group
Explanation:Associative arrays treat the pattern as a single object, allowing adjustment of spacing or counts later via the Properties panel.
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48Before starting an orthographic drawing in AutoCAD, which command is crucial for setting up the drawing boundaries/area?
A.LIMITS
B.AREA
C.BOUNDARY
D.REGION
Correct Answer: LIMITS
Explanation:The LIMITS command sets the invisible rectangular boundary of the drawing area.
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49The Profile Plane (PP) is used to generate which view?
A.Front View
B.Top View
C.Side View
D.Auxiliary View
Correct Answer: Side View
Explanation:The Profile Plane is perpendicular to both HP and VP, and is used to project the Side (Profile) View.
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50When using FILLET between two parallel lines:
A.It is impossible to fillet them
B.It creates a semicircle connecting the endpoints
C.It deletes one line
D.It creates a chamfer
Correct Answer: It creates a semicircle connecting the endpoints
Explanation:If two parallel lines are selected for a fillet, AutoCAD creates a semi-circular cap connecting them, regardless of the radius setting (provided the radius isn't too large).