Hands-On AutoCAD LT ©2005

Chapter 4: Pictorial Representations

Isometric Projections


1.	In axonometric drawings,
		A)	the front of the object is flat to the viewing plane.
		B)	all of the projection lines are drawn perpendicular to the viewing plane.
		C)	holes are not distorted on the viewing plane.
		D)	the depth of the projected drawing is shown at half scale.


2.	In isometric projection, the angles between the X, Y, and Z axes are equally spaced at
		A)	30°.
		B)	60°.
		C)	90°.
		D)	120°.


3.	To change the snap and grid to isometric mode,
		A)	pick the Isometric snap radio button on the Snap and Grid tab of the Drafting Settings dialog box.
		B)	enter the SNAP command, select the Rotate option, and set the rotation to 120°.
		C)	enter the GRID command and select the Isometric option.
		D)	enter the ISOMETRIC system variable and set its value to 1.


4.	To change the cursor to another isometric plane in isometric snap mode, use the
		A)	ISOMETRIC command.
		B)	Isoplane option of the SNAP command.
		C)	ISOPLANE command.
		D)	Iso option of the PLANE command.


5.	All of the following are isoplanes in AutoCAD LT^®except
		A)	right.
		B)	left.
		C)	top.
		D)	front.


6.	In isometric mode, Ortho
		A)	forces lines to be horizontal and vertical only.
		B)	forces lines to run along the X and Y directions in the current isoplane.
		C)	forces lines to run along the Z direction in the current isoplane.
		D)	has no effect.


7.	To create a circle in an isometric drawing, use the
		A)	Isocircle option of the ELLIPSE command.
		B)	Circle option of the ISOPLANE command.
		C)	Ellipse arc button on the Draw toolbar.
		D)	Ellipse option of the ISOPLANE command.


8.	To create an inclined plane on an isometric drawing,
		A)	turn Ortho on to force the lines to be horizontal and vertical.
		B)	draw the nonisometric lines first to establish the overall shape of the inclined plane; then use object snap to finish the drawing.
		C)	first draw the object lines that lie on the principal axes; then use object snaps to create the nonisometric lines.
		D)	draw the isometric lines and nonisometric lines in order as they appear on the inclined plane.


9.	Noncircular curves on an isometric projection
		A)	are created using the Noncircular option of the ARC command.
		B)	are created using polylines.
		C)	can be approximated using ellipses and elliptical arcs.
		D)	should be avoided because AutoCAD^® cannot represent them adequately.


10.	A drawing that shows how a part should be assembled by separating the individual components is a(n)
		A)	isometric component drawing.
		B)	exploded assembly drawing.
		C)	detail drawing.
		D)	isometric detail drawing.