D7 MASTER THE DAY

What is the name of the angle that appears larger than the true inclination when a line is inclined to both HP and VP?

• True angle
• Visual angle
• Apparent angle
• Oblique angle

Answer explanation

Apparent angle is observed when a line is inclined to both planes and appears larger than the true angle of inclination.

When a plane is parallel to HP, its plan shows:

• Distorted shape
• True shape
• Inclined view
• No view

Answer explanation

When a plane is parallel to HP, its plan (top view) represents the true size and shape of the object.

In orthographic projection, a plane inclined to both HP and VP appears:

• As a circle
• In true shape
• As a straight line
• Distorted in both views

Answer explanation

When inclined to both reference planes, neither the front view nor top view shows the true shape — both are distorted.

The trace of a plane is defined as:

• Line connecting the base of the plane
• Apparent intersection
• Line where the plane meets a reference plane
• Plane boundary

Answer explanation

The trace of a plane is the line along which it intersects with a reference plane like HP or VP.

If a line is parallel to both HP and VP, it has:

• Horizontal trace only
• Vertical trace only
• Both HT and VT
• No trace

Answer explanation

A line parallel to both planes will not intersect either, hence has no trace.

In isometric projection, the angle between any two isometric axes is:

• 90°
• 60°
• 120°
• 45°

Answer explanation

Isometric projection uses three axes that are equally spaced at 120° from each other.

Which projection method shows the object with three vanishing points?

• One-point perspective
• Two-point perspective
• Oblique projection
• Three-point perspective

Answer explanation

Three-point perspective is used for tall objects and shows convergence along three axes with three vanishing points.

Which of the following is not a method of oblique projection?

• Cavalier
• Cabinet
• General oblique
• Parallel perspective

Answer explanation

Parallel perspective refers to a perspective projection and is not categorized under oblique projections.

In a cabinet projection, the receding lines are drawn at half scale because:

• They represent curved surfaces
• They reduce distortion
• They make drawing simpler
• They match the true scale

Answer explanation

Cabinet projection reduces receding lines to half to reduce distortion and provide better realism.

The ratio of isometric length to true length is approximately:

• 1.0
• 0.82
• 1.22
• 0.5

Answer explanation

Isometric length is shorter than true length; the ratio is approximately 0.82.