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The following readings were taken with a dumpy level set halfway between points A and B, which tape distance measured both side of instrument measured 35m: A = 1,533 and B = 1,061 The instrument was moved close to B and a second set of reading were taken as follows: A = 1,763 B = 1,294 Rewrite the readings in the fieldbook form and determine the collimation error in the instrument.?
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The following readings were taken with a dumpy level set halfway betwe...
Fieldbook Readings:
- Initial set of readings:
- From the dumpy level set halfway between points A and B, the tape distance measured on both sides of the instrument is 35m.
- Reading at point A: 1,533
- Reading at point B: 1,061
- Second set of readings:
- The instrument was moved close to point B.
- Reading at point A: 1,763
- Reading at point B: 1,294

Calculating Collimation Error:
The collimation error is the difference between the actual height of the instrument and the height determined from the readings. It can be calculated using the following formula:

Collimation Error = (Reading at A - Reading at B) / 2

Using the initial set of readings:
Collimation Error = (1,533 - 1,061) / 2 = 236

Using the second set of readings:
Collimation Error = (1,763 - 1,294) / 2 = 234.5

Explanation:
1. The initial set of readings were taken with the dumpy level set halfway between points A and B. The tape distance measured on both sides of the instrument is 35m. The reading at point A is 1,533 and at point B is 1,061.
2. The instrument was then moved close to point B, and a second set of readings were taken. The reading at point A is 1,763 and at point B is 1,294.
3. To determine the collimation error, we use the formula (Reading at A - Reading at B) / 2. This calculates the difference between the readings at points A and B, and then divides it by 2 to get the average error.
4. Using the initial set of readings, the collimation error is calculated as (1,533 - 1,061) / 2 = 236. This means that the instrument was off by an average of 236 units when taking the initial set of readings.
5. Using the second set of readings, the collimation error is calculated as (1,763 - 1,294) / 2 = 234.5. This means that the instrument was off by an average of 234.5 units when taking the second set of readings.
6. The collimation error can be positive or negative depending on whether the readings are too high or too low. In this case, both collimation errors are positive, indicating that the readings were consistently higher than the actual height of the instrument.
7. The collimation error is an important factor to consider when using a dumpy level, as it affects the accuracy of the measurements. By knowing the collimation error, adjustments can be made to the readings to correct for the instrument's error.
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The following readings were taken with a dumpy level set halfway between points A and B, which tape distance measured both side of instrument measured 35m: A = 1,533 and B = 1,061 The instrument was moved close to B and a second set of reading were taken as follows: A = 1,763 B = 1,294 Rewrite the readings in the fieldbook form and determine the collimation error in the instrument.?
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The following readings were taken with a dumpy level set halfway between points A and B, which tape distance measured both side of instrument measured 35m: A = 1,533 and B = 1,061 The instrument was moved close to B and a second set of reading were taken as follows: A = 1,763 B = 1,294 Rewrite the readings in the fieldbook form and determine the collimation error in the instrument.? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The following readings were taken with a dumpy level set halfway between points A and B, which tape distance measured both side of instrument measured 35m: A = 1,533 and B = 1,061 The instrument was moved close to B and a second set of reading were taken as follows: A = 1,763 B = 1,294 Rewrite the readings in the fieldbook form and determine the collimation error in the instrument.? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The following readings were taken with a dumpy level set halfway between points A and B, which tape distance measured both side of instrument measured 35m: A = 1,533 and B = 1,061 The instrument was moved close to B and a second set of reading were taken as follows: A = 1,763 B = 1,294 Rewrite the readings in the fieldbook form and determine the collimation error in the instrument.?.
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