Cochin University of Science and Techology (CUST) 2006 B.Tech Civil Engineering Surveying I - Question Paper

BTS(C) - III - 06 - 057 (B)

B. Tech Degree III Semester Examination, December 2006

CE 302 SURVEYING I

(1999 Admission Onwards)

3 Hours    Maximum Marks : 100

(a)    Explain the principle used in chain surveying. What are the limitations of chains surveying? Explain briefly the situations where it can be suitably employed?    (12)

(b)    A line was measured with a steel tape which was exactly 30m at 20C at a pull of 100N, the measured length being 1650.00m. The temperature during measurement was 30C and the pull applied was 150N. Find the length of the line, if the cross sectional area of the tape was 0.025 sq.cm. The coefficient of expansion of the material of the tape per 1C = 3.5 x 10⁶ and the modules of elasticity of the material

of the tape = 2.1 x 105N/mm2,    (8)

OR

(a)    Explain reciprocal ranging in detail. When it is adopted?    (8)

(b)    Differentiate between:

(i)    Ranging rod and offset rod

(ii)    Check line and Tie line    (4)

(c)    A distance of 2000m was measured by a 30m chain. Later on, it was detected that the chain was 0. lm too long. Another 500m was measured and it was detected that the chain was 0.15m too long. If the length of the chain in the initial stage, was quite

correct determine the exact length that was measured.    (8)

(a)    What is meant by closing error of a compass transverse. Show how can it be

adjusted by graphical method.    (10)

(b)    A closed compass traverse was conducted round a forest and the following whole circle bearings were observed. Determine which of the stations suffer from local attraction and compute the values of the corrected bearings.

Line	FB	BB
AB	14 20'	256	00'
BC	107 20'	286	20'
CD	224 50'	44	50'
DA	306 40'	126	00'

(10)

OR

(a)    State the three point problem in planetable surveying and describe how it is solved

by Bessels method.    (10)

(b)    What are the advantages and disadvantages of plane table survey over other

methods of surveying?    (10)

(a)    What are the sources of error in leveling? What precautions you will take to avoid them? (8)

(b)    The following readings were successively taken with a instrument in levelling work: 0.32,0.53,0.62, 1.78, 1.91,2.35, 1.75,0.35,0.69, 1.24 and 0.98m. The position of the instrument was changed after 3^rd, 7^th and 9^th readings. Rule out the form of a leyel book and enter the above readings. Assume R.L of the first point as 81.53m. Calculate the

R.L of remaining points. Apply usual checks.    (12)

OR

VI. (a)	Explain the uses of contours.	(4)
(b)	Which are the different methods of contouring?	(8)
(c)	What are the characteristics of contours?	(8)
VII. (a)	What is Simpsons Rule in the computation of areas of figures? Derive an expression
	for it.	(10)
(b)	The following offsets were taken from a chain line to a hedge.

Dist in ms	0	30	60	90	120	150	180
Offsets in ms	9.4	10.8	12.5	10.5	14.5	13.0	7.5

Compute the area included between the chain line, the hedge & end offsets by the Simpsons rule.    (10)

OR

With the help of sketches explain in detail any four minor instruments.    (4x5 -20)

Differentiate between Bowditchs Rule and Transit Rule.

Explain in detail the repetition and reiteration methods of thedolite survey.

Line	Length Cm) _	Latitude	Departure
AB	200	-173.20	+100.00
BC	130	00.00	+130.00
CD	100	+86.60	+50.00
DE	250	+250.00	0.00
EA	320	-154.90	-280.00

Balance the traverse by Bowditchs Method.    (8)

OR

X. (a) Differentiate between fixed hair method and movable hair method of tacheometry. (10)

(b) The vertical angles to vanes fixed at 0.5m and 3.5m above the foot of the staff held

vertically at a point were + 2 30* and +4 Y2! respectively. Find the horizontal distance and the R.L of the point if the level of the instrument axis is 125.35 metres above datum.

(10)

Attachment: cochin-university-of-science-and-techology--cust--2006-b-tech-civil-engineering-36770-1.pdf

Earning:   Approval pending.