STUDY LESSON:-22 [CIVIL ENGINEERING]
For Competitive exams/Govt. jobs/Semester exam/Self Study Purpose
1. True Bearing of line can be expressed as __________
2. Which statement is true for measuring the accuracy of an Electronic Distance Measuring Instrument specified as ±(a mm + ppm) ?
a) a remains constant and b varies in proportion to the distance been measured
b) Both a and b remain constant, irrespective of the distance being measured
c) Both a and b vary is proportion to the distance being measured
d) none of these
3. Scale of photography (S) can be represented as
a) f/(H-h) b) H/(f-h) c) f/(h-H) d) none of these
4. Mean sea level(MSL) is used as a ___________-
5. What will be the relative precision of a traverse given in a closed loop traverse of total length 1Km where the closing error of the departure and latitude are correspondingly 0.3m and 0.4m?
a) 1:2000 b) 1:3000 c) 1:4000 d) 1:5000
6. Pull correction can be measured as
a) (P-P0)x A /LE b) (Po-P)x L /AE c) (P-P0)x L /AE d) (P-P0)x E /AL
7. Sensitivity(Φ) is termed as ________
8. Setting out a curve using two theodolite method involves
a) angular measurement only b) one linear and two angular measurements c) one linear and one angular measurements d) linear measurement only
9. Length of curve (l) = __________
10. Length of the longest chord in a curve _________
Answers:-
1. Magnetic Bearing + Declination
2. a) a remains constant and b varies in proportion to the distance been measured.
3. a) f/(H-h), [f= focal length of camera, h= Elevation of the surface, H=Ariel photography height]
4. reference surface for establishing the vertical control
5. a) 1:2000
6. c) (P-P0)x L /AE
7. Angular value of 1 division of bubble.
8. a) angular measurement only
9. πR∆/180
10. 2Rsin30
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