Understanding True Dip and Apparent Dip

The video tutorial explains how to determine the true dip of a plane when given the apparent dip and other data. It introduces the concept of true dip and apparent dip, and discusses four methods to find the true dip: orthographic projection, trigonometry, and alignment diagrams. Each method is explained with examples, highlighting their advantages and limitations. The tutorial emphasizes understanding the geometric and mathematical principles behind each method to accurately determine the true dip.

What is the direction called in which a plane travels in the horizontal plane?

• Apparent dip

• True dip

• Strike

• Trend

Which of the following is NOT a method to find the true dip?

• Stereographic projection

• Orthographic projection

• Geometric scaling

• Alignment diagrams

In orthographic projection, what is the significance of the distance 'D'?

• It is the length of the strike line.

• It is the angle between the strike and the apparent dip.

• It is the height of the block used in both triangles.

• It represents the true dip angle.

What is the main advantage of using the orthographic projection method?

• It provides a visual understanding of the dip angles.

• It is the fastest method.

• It is the most accurate method.

• It requires no physical measurements.

Which angle is represented by Delta in the trigonometry method?

• Apparent dip

• True dip

• Angle between strike and trend

• Plunge of the apparent dip

In the trigonometry method, what does Beta represent?

• Plunge of the apparent dip

• True dip

• Apparent dip

• Angle between strike and trend

What is the calculated true dip using the trigonometry method in the video?

• 19 degrees

• 22 degrees

• 23.3 degrees

• 25 degrees

What is the purpose of an alignment diagram?

• To determine the trend of the apparent dip

• To find the true dip using two known values

• To calculate the apparent dip

• To measure the strike of a plane

Which two values are needed to use an alignment diagram?

• Apparent dip and angle between strike and apparent dip

• Strike and trend

• True dip and angle between strike and trend

• True dip and apparent dip

What is the approximate true dip value obtained using the alignment diagram in the video?

• 23 degrees

• 25 degrees

• 19 degrees

• 22 degrees