Deck 19: Surveying Concepts and Techniques

Question 1

Chain surveying consists of the arrangement of framework of triangles because a triangle is the only simple plane figure which can be plotted uniquely if

A)three sides
B)three angles
C)one side and two angles
D)one angle and two sides

Answer 1

three sides

Question 2

The curvature of the earth is taken into consideration if the limit of survey is

A)50to 100 km²
B)100 to 200 km²
C)200 to 250°km²
D)more than 250km²

Answer 2

more than 250km²

Question 3

The horizontal distance between any two consecutive contours is called

A)vertical equivalent
B)horizontal equivalent
C)contour interval
D)contour gradient

Answer 3

horizontal equivalent

Question 4

When the effect of refraction is taken into account in levelling, the true staff reading is obtained by subtracting the correction for refraction from the observed staff reading.

A)Right
B)Wrong

Question 5

A vertical line at any point is a line normal to the level surface at the point.

Question 6

A stadia telescope, in a tacheometer, is fitted with

A)two additional vretical hairs
B)two additional horizontal hairs
C)all of these

Question 7

In route surveys, the most suitable method of contouring is

A)by squares
B)by radial lines
C)by cross-sections
D)by tacheometer

Question 8

Which of the following statement is wrong?

A)The magnetic meridian coincides with the true meridian at all the places
B)The magnetic meridian does not vary from place to place on the earth's surface.
C)The magnetic declination at a place is constant.
D)all of the above

Question 9

The direct angles may have any value between

A)0° and 90°
B)0° and 120°
C)0° and 180°
D)0° and 30°

Question 10

When the length of a chord is less than the peg interval, it is known as

A)small chord
B)short chord
C)sub-chord
D)normal chord

Question 11

The fundamental requirement of the spiral curve is that its radius of curvature at any point shall vary inversely as the distance from the beginning of the curve.

A)Agree
B)Disagree

Question 12

The deflection angle may be directly obtained by setting the instrument to read

A)0°
B)90°
C)180°
D)270°

Question 13

If x is the smallest division on the main scale and n are the number of divisions on the vernier, then the least count of the vernier is

A)x + n
B)x - n
C)x x n
D)x / n

Question 14

A line joining some fixed points on the main survey lines, is called a

A)check line
B)tie line
C)base line
D)none of these

Question 15

The degree of the curve is the angle subtended by a chord of

A)15 m
B)20 m
C)25 m
D)30m

Question 16

The length of peg interval for flat curves is

A)15 m
B)20 m
C)25 m
D)30m

Question 17

A staff reading taken on a point whose elevation is to be determined as on a change point is called.

A)fore sight reading
B)back sight reading
C)intermediate sight
D)none of these

Question 18

When the position of a point is to be located accurately by a perpendicular offset, the direction of perpendicular is set out by means of

A)theodolite
B)optical square
C)dumpy level
D)planimeter

Question 19

The height of instrument is equal to

A)reduced level of bench mark + back sight
B)reduced level of bench mark + fore sight
C)reduced level of bench mark + intermediate sight
D)back sight + fore sight

Question 20

The tachemometric method of contouring is particularly suitable

A)when a contoured map of hill is required
B)when the area is not very extensive
C)in surveys of roads or railways
D)all of these

Question 21

The method of surveying in which field work and plotting work are done simultaneously, is called

A)compass surveying
B)levelling
C)plane tabling
D)chain surveying

Question 22

The operation of turning the table so that all the lines on the paper are parallel to the corresponding lines on the ground, is called

A)levelling
B)centering
C)setting
D)orientation

Question 23

A line joining the apex of a triangle to some fixed point on the opposite side is called a

A)check line
B)tie line
C)base line
D)none of these

Question 24

Which of the following statement is correct?

A)The error in measured length due to bad ranging is compensating error.
B)If the chain used in measuring a distance is too short, the error is positive error.
C)The error in measured length due to careless holding of chain is cumulative error.
D)When the pull applied while measuring with a tape, is more than the standard pull for that tape, the error in measured length is positive.

Question 25

The contour lines can cross one another on map only in the case of

A)a vertical cliff
B)a valley
C)a ridge
D)an overhanging cliff