Read each question carefully and then select the best answer.

1			Which coordinate system uses two angles and one distance?
			A)	world
			B)	spherical
			C)	local
			D)	cylindrical
2			Which coordinate system uses two distances and one angle?
			A)	world
			B)	spherical
			C)	local
			D)	cylindrical
3			If you are going to create a tangent arc between two arcs that cannot intersect, to find the center of the tangent arc you must set your compass to a radius that is:
			A)	the existing arc radius minus the tangent arc radius
			B)	centered at the tangent point of the new arc and the existing arc
			C)	the existing arc radius plus the tangent arc radius
			D)	the sum of the two existing arc radii
4			________ do not define a plane.
			A)	Two parallel lines
			B)	Three points
			C)	Two skew lines
			D)	A line and a point
5			A(n) ________ subtends an angle which is greater than that of a semicircle
			A)	quadrant
			B)	segment
			C)	secant
			D)	major arc
6			What type of curve is created by the intersection of a plane parallel to the side of cone?
			A)	parabola
			B)	hyperbola
			C)	ellipse
			D)	roulette
7			A(n) ________ is created by the motion of a point on a circle as the circle rolled along a straight line
			A)	epicycloid
			B)	hyperbola
			C)	cycloid
			D)	spiral
8			When making a 'pipe' with a ruled surface, the _________ determines whether the pipe is straight or curved
			A)	generator
			B)	generatrix
			C)	cutting plane
			D)	directrix
9			The path that a generatrix follows is called the:
			A)	parabola
			B)	b-spline
			C)	ruler
			D)	directrix
10			Another name for a cube is a
			A)	hexahedron
			B)	tetrahedron
			C)	isocohedron
			D)	octahedron
11			A(n) ________ cone has two planar surfaces parallel to each other
			A)	truncated
			B)	frustrum
			C)	right
			D)	oblique
12			Which type of surface model construction use a series of directix curves to define a surface?
			A)	sweeping
			B)	lofting
			C)	NURBS
			D)	revolving