Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 1 (Q.No. 38)
38.
Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to
Discussion:
22 comments Page 1 of 3.
Rinku Kumar meena said:
3 years ago
Actually, the maximum length of offset 1/40 cm it means 0.025mm.
But the above question's maximum length of offset 0 .05cm. It means 0.5 mm or 1/20 cm
So, the maximum length of offset=s/20*r/√2.
S = 20
r = 40.
So, 20/20*40/√2.
= 28.32m.
But the above question's maximum length of offset 0 .05cm. It means 0.5 mm or 1/20 cm
So, the maximum length of offset=s/20*r/√2.
S = 20
r = 40.
So, 20/20*40/√2.
= 28.32m.
(10)
Kenneth andres said:
3 years ago
1/100 = 0.01m.
40/100 = 0.4,
0.01m/20m = 0.4m/x,
X^2 = 800,
X = 28.28.
40/100 = 0.4,
0.01m/20m = 0.4m/x,
X^2 = 800,
X = 28.28.
(4)
Abdus samad khan said:
4 years ago
Cosec = 1/sin.
Than sin45 =.707.
Cosec = 1/.707 = 1.414.
Than sin45 =.707.
Cosec = 1/.707 = 1.414.
Vijender thakur said:
5 years ago
How come 1.414? Please explain the answer in detail.
Shubham P said:
5 years ago
Formula : Limiting error = (L/sin@) * (1/r) * (1/S).
∠ = 45' for max limiting offset.
1/r = 1:40 = accuracy of measurement.
1/S= 1:20 = scale.
Limiting error = 0.05 cm.
L = 20*(2)^0.5.
L= 28.28 m.
∠ = 45' for max limiting offset.
1/r = 1:40 = accuracy of measurement.
1/S= 1:20 = scale.
Limiting error = 0.05 cm.
L = 20*(2)^0.5.
L= 28.28 m.
(5)
Sachin patil said:
5 years ago
What does 1 in 40 refer? Please explain.
(2)
Chandu said:
7 years ago
The maximum length or limiting length=L * S/sin0.
S=scale,
0=45°
S=scale,
0=45°
(1)
Er Meghanada (Bhadrak) said:
8 years ago
L = 0.05"40"20*14.14 = 28.28 m.
Aashish said:
8 years ago
This formula is applicable maximum errorrs/√2.
28.28 correct answer.
28.28 correct answer.
(2)
JAY PANCHAL said:
8 years ago
Why 1.414?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers