Wednesday, September 7, 2016
S.B. Roll No. _____________
Duration : 4 Hrs.
1. Fill in the blanks.
a. Correction for sag is always ________
b. _______ is used for setting out right angles.
c. Variation tension in the chain is ______ source of error.
d. The angle between, two mirror of optical square is equal to _____
e. For accurate measure of distances ________ is used
State True or false
f. Invar tape cannot be used for ordinary work.
g. Chain survey is suitable in flat country.
h. In chain survey you work form whole to part
i. Optical square is a reflecting instrument.
j. Offset rod is sued for taking short offsets.
Note: Attempt any ten questions.
a. What is a back bearing? Explain
b. What is the function of optical square?
c. Explain local attraction.
d. How will you adjust plane table?
e. Explain orientation in plane tabling.
f. Differentiate between true and magnetic bearing.
g. Compare prismatic and surveyor’s compass.
h. What is sources of error in levelling?
i. Explain working of optical square,
j. What is traversing? Explain
k. How off sets are recorded? Explain
l. Explain dip of needle.
Section – C
Note attempt any two questions
3. A road actually 2660m long was found to be 2652 m when measured with a defective 30m chain. How much correction does the chain need in mm?
a. The baring of a line AB is 164 – 15 and the angle ABC is 117 30 . what is the bearing of BC?
b. Find the angle between the lines AB and BC if their respective bearings are 65- 45 and 117 30.
a. What are Lehmann’s rules for solving thee point problems?
b. Compare collimation method and rise and fall method for levelling.
c. What are the difficulties in levelling.
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