Test 1

In perspective projection, what is the picture plane used for?

• On the picture plane, we draw the perspective projection of the object

• On the picture plane, we place the object to draw perspective

• The picture plane is used for the observer to stand up

What are the characteristics of vertical picture plane?

• The picture plane is inclined at an angle greater than or less than 90 degrees to the ground plane

• The picture plane is parallel to the ground plane

• The picture plane is perpendicular to the ground plane

System of perspective projection is constructed from which projection

below ?

• Parallel projection

• Perpendicular projection

• Perspective projection

• All of them

According to the cone of vision, the best observation amplitude of the viewer is:

• 15 to 30 degrees

• 30 to 60 degrees

• 45 to 60 degrees

• 0 to 180 degrees

In which situation the perspective of vertical picture plane is used:

• When the observer looks straight, the axis of the cone of vision is parallel to the ground

• When the observer looks up, the axis of the cone of vision looks upwards

• When the observer looks down, the axis of the cone of vision looks downwards

How many kind of perspective projection systems ?

• 2- (Inclined picture plane and vertical picture plane)

• 1- (Only Inclined picture plane)

• 1- (Only vertical picture plane)

What is the horizon line ?

• Is the perspective of the endless line of the ground plane

• Is the perspective of the line parallel to the picture plane

• Is the intersection of the ground plane with the picture plane

• Is the intersection of the ground plane with the picture plane

Where is the vanishing point of the perspective projection of the lines that parallel to the picture plane?

• The vanishing point is on the horizon line

• The vanishing point is at the bottom of the picture plane

• No vanishing point (vanishing point is extremely far away)

• Any vanishing point on the picture plane

In the perspective of inclined picture plane, the perspective projection of the lines perpendicular to the ground plane has any of the following properties:

• There is a common vanishing point

• There are two vanishing points

• There is no convergence

What is the vanishing point of the straight lines?

• The perspective of the midpoint of a line

• The perspective of the endless point of the line

• The intersection of the straight line and the picture plane