FUNDAMENTAL SURVEYING Leveling & Differential Leveling 1

Question 1

What is a benchmark (BM) in surveying?

Accepted Answer

A permanent point of known elevation used as a reference

Answer

A temporary point used only during a single survey day

Answer

The highest point on a survey route

Answer

A control point established by GPS only

Question 2

In differential leveling, what is a 'backsight' (BS)?

Accepted Answer

A rod reading taken on a point of known elevation

Answer

A reading taken toward the previous station

Answer

A reading taken in the direction of magnetic north

Answer

The closing reading taken at the final benchmark

Question 3

Height of Instrument (HI) in leveling is calculated as:

Accepted Answer

Known elevation plus backsight reading

Answer

Known elevation minus backsight reading

Answer

Foresight reading minus backsight reading

Answer

Backsight reading times foresight reading

Question 4

What is a 'turning point' (TP) in differential leveling?

Accepted Answer

A temporary point used to carry elevation forward

Answer

The point where the survey changes direction horizontally

Answer

The highest rod reading in a level run

Answer

A permanent monument marking a property corner

Question 5

If HI = 512.34 ft and the foresight rod reading is 3.21 ft, what is the elevation of the foresight point?

Accepted Answer

509.13 ft

Answer

515.55 ft

Answer

512.34 ft

Answer

3.21 ft

Question 6

Which type of level uses a pendulum compensator to automatically maintain a horizontal line of sight?

Accepted Answer

Automatic level

Answer

Dumpy level

Answer

Builder's level

Answer

Hand level