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Q1. | In case of reduction of levels by the height of instrument method, |

A. | âˆ‘ B.S. - âˆ‘ F.S. = difference in R.L.S of the first station and last station [Wrong Answer] |

B. | âˆ‘ (R.L. + I + F.S.) - first R.L = âˆ‘ (H.I. + No. of R.L.s.) [Wrong Answer] |

C. | both (a) and (b) above [Wrong Answer] |

D. | neither (a) nor (b). [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :Himanshu Gupta Said on 2019-06-27 04:19:30Sigma BS - Sigma FS = Last RL - First RL. !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Closed contours of decreasing values towards their centre, represent.

a hill

a depression

a saddle or pass

a river bed.

⇒ Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to eccentricity of verniers

error due to displacement of station signals

error due to wrong adjustment of line of collimation and trunnion axis

error due to inaccurate graduation

⇒ The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as.

chromatic aberration

spherical aberration

astigmatism

coma.

⇒ The number of horizontal cross wires in a stadia diaphragm is

one

two

three

four

⇒ If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

77° N

23° S

13° E

13° W

⇒ Ranging is an operation of.

reconnaissance

judging the distance

determination of slope

establishing intermediate points between terminals.

⇒ Centering error of a theodolite produces an error.

in all angles equally

which does not vary with the direction or pointing

which varies with the direction of pointing and inversely with the length of sight

none of these.

⇒ If the length of a chain is found to be short on testing, it can be adjusted by

straightening the links

removing one or more small circular rings

closing the joints of the rings if opened out

all of the above

⇒ If the whole circle bearing of a line is 270°, its reduced bearing is.

N 90Â° W

S 90Â° W

W 90Â°

90Â° W.

⇒ Pick up the correct statement from the following :

the framework which consists of a series of connected lines, the lengths and directions of which are found from measurements, is called a traverse.

the system of a series of lines which forms a circuit which ends at the starting point, is called a closed traverse

the traverse that starts from a point already fixed in some survey system and ends on another such point, is called a controlled traverse

all the above.

⇒ In the double application of principle of reversion, the apparent error is

equal to true error

half the true error

two times the true error

four times the true error

⇒ The slope correction may be ignored if.

the slope of the ground is less than 3Â°

to slope of the ground is say 1 in 19

both (a) and (b)

neither (a) nor (b)

⇒ You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of.

repetition

reiteration

double observations

exactness.

⇒ If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures is more than the sum of the east departures, the bearing of the closing line is in the

NE quadrant

SE quadrant

NW quadrant

SW quadrant

⇒ Hydrographic survey deal with the mapping of

Large water bodies

Rainfall data

Wave movement

None of the above

⇒ A back sight.

is always taken on a point of known elevation or can be computed

is added to the known level to obtain the instrument height

taken on an inverted staff is treated as negative

all the above.

⇒ In a plane table survey the method used for locating details is

Resection

Resection

Intersection

(A) or (B) above

⇒ If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for.

horizontal sights

inclined sights upward

inclined sight downward

none of these.

⇒ Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to.

shift

twice the shift

thrice the shift

four times the shift.

⇒ The latitude of a traverse leg is obtained by multiplying its length by.

tangent of its reduced bearing

sign of its reduced bearing

cosine of its reduced bearing

cosecant of its reduced bearing.

⇒ Direct method of contouring is

a quick method

adopted for large surveys only

most accurate method

suitable for hilly terrains

⇒ The size of a plane table is

750 mm x 900 mm

600 mm x 750 mm

450 mm x 600 mm

300 mm x 450 mm

⇒ If

*R*is the radius of the main curve, θ the angle of deflection,

*S*the shift and

*L*the length of the transition curve, then, total tangent length of the curve, is.

(R - S) tan Î¸/2 - L/2

(R + S) tan Î¸/2 - L/2

(R + S) tan Î¸/2 + L/2

(R - S) tan Î¸/2 + L/2

⇒ If

*S*is the length of a subchord and

*R*is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to.

573 S/R

573 R/S

171.9 S/R

1718.9 S/R.

⇒ Accurate measurement of deflection angles with a transit not properly adjusted may be made by.

setting the vernier A at zero at back station and then plunging the telescope

setting the vernier A at zero at back station and turning the instrument to the forward station

taking two back sights one with the telescope normal and the other with telescope inverted

none of these.

⇒ The rise and fall method of levelling provides a complete check on

backsight

intermediate sight

foresight

all of the above

⇒ Metallic tapes are made of

Steel

Invar

Cloth and Nvires

Nickel

⇒ While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance.

20 (sin Î¸ - 1)

20 (cos Î¸ - 1)

20 (sec Î¸ - 1)

20 (cosec Î¸ - 1).

⇒ On a diagonal scale, it is possible to read up to.

one dimension

two dimensions

three dimensions

four dimensions.

⇒ The 'fix' of a plane table station with three known points, is bad if the plane table station lies.

in the great triangle

outside the great triangle

on the circumference of the circumscribing circle

none of these.