Question 10: ( 1 a level is set up midway between two stakes as shown in the figure below. The two stakes are about 200 feet apart. The rod reading on stake A is 8.72 feet and the rod reading on stake B is 5.61 feet. The level is then moved to point B and set up so that the eyepiece end of the telescope is just touching the rod as it is held plumb on the stake. A reading of 5.42 feet is taken from the rod at B by sighting backward through the telescope. Error in Ae 30 m A A Horizontal Line Line of Sight 30m (100 ft) ㅈ (a) Horizontal Line Line of Sight 60m (200 ft) (b) Horizontal Line Line of Sight 30 m (100 ft) Ae, B A0₂ }. Error in b, 30m B Error in 60m 1) What is the correct difference in elevation between the tops of stakes A and B? 2) If the level has been in perfect adjustment, what reading would have been observed at A from the second setup?
Question 10: ( 1 a level is set up midway between two stakes as shown in the figure below. The two stakes are about 200 feet apart. The rod reading on stake A is 8.72 feet and the rod reading on stake B is 5.61 feet. The level is then moved to point B and set up so that the eyepiece end of the telescope is just touching the rod as it is held plumb on the stake. A reading of 5.42 feet is taken from the rod at B by sighting backward through the telescope. Error in Ae 30 m A A Horizontal Line Line of Sight 30m (100 ft) ㅈ (a) Horizontal Line Line of Sight 60m (200 ft) (b) Horizontal Line Line of Sight 30 m (100 ft) Ae, B A0₂ }. Error in b, 30m B Error in 60m 1) What is the correct difference in elevation between the tops of stakes A and B? 2) If the level has been in perfect adjustment, what reading would have been observed at A from the second setup?
Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Saeed Moaveni
Chapter7: Length And Length-related Variables In Engineering
Section: Chapter Questions
Problem 42P
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Question

Transcribed Image Text:Question 10: (
, a level is set up midway
between two stakes as shown in the figure below. The
two stakes are about 200 feet apart. The rod reading
on stake A is 8.72 feet and the rod reading on stake B
is 5.61 feet. The level is then moved to point B and set
up so that the eyepiece end of the telescope is just
touching the rod as it is held plumb on the stake. A
reading of 5.42 feet is taken from the rod at B by
sighting backward through the telescope.
Error
in
30 m
a₁
ΔΘ,
A
82
A
Horizontal Line
Line of Sight
30m (100 ft)
+
(a)
Horizontal Line
Line of Sight
60m (200ft)
(b)
Horizontal Line
Line of Sight
30 m (100 ft)
Error
Ae₁ in
b, 30m
B
ܕܘܠ
B
Error
in
60m
1) What is the correct difference in elevation
between the tops of stakes A and B?
2) If the level has been in perfect adjustment, what
reading would have been observed at A from the
second setup?
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