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.Management Sciences
Category: Surveying
Contour interval is_______________?
A. inversely proportional to the scale of the map
B. directly proportional to the flatness of ground
C. larger for accurate works
D. larger if the time available is more
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to_________________?
1. altitude bubble on index frame
2. altitude bubble on index frame if it is to be used as a level
3. altitude bubble on telescope
4. altitude bubble on telescope if it is to be used as a level
The correct answer is?
A. only (1)
B. both (1) and (4)
C. only (3)
D. both (2) and (3)
Refraction correction________________?
A. completely eliminates curvature correction
B. partially eliminates curvature correction
C. adds to the curvature correction
D. has no effect on curvature correction
Direct method of contouring is_________________?
A. a quick method
B. adopted for large surveys only
C. most accurate method
D. suitable for hilly terrains
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are ______________ ?
1. levelling
2. orientation
3. centering
The correct sequence of these operations is
A. (1), (2),(3)
B. (1), (3), (2)
C. (3), (1), (2)
D. (2), (3), (1)
Cross staff is an instrument used for________________?
A. measuring approximate horizontal angles
B. setting out right angles
C. measuring bearings of the lines
D. none of the above
The sensitivity of a bubble tube can be increased by________________?
A. increasing the diameter of the tube
B. decreasing the length of bubble
C. increasing the viscosity of liquid
D. decreasing the radius of curvature of tube
Which of the following is not used in measuring perpendicular offsets ?
A. line ranger
B. steel tape
C. optical square
D. cross staff
The permissible error in chaining for measurement with chain on rough or hilly ground is_____________?
A. 1 in 100
B. 1 in 250
C. 1 in 500
D. 1 in 1000
The difference between a level line and a horizontal line is that_______________?
A. level line is a curved line while hori-zontal line is a straight line
B. level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
C. horizontal line is normal to plumb line while level line may not be normal to the plumb line
D. both are same
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