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Q1. | Prolongation of chain line across an obstruction in chain surveying, is done by. |

A. | making angular measurements [Wrong Answer] |

B. | drawing perpendiculars with a chain [Correct Answer] |

C. | solution of triangles [Wrong Answer] |

D. | all the above. [Wrong Answer] |

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**Also Read Similar Questions Below :**

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

one

two

three

four

⇒ The constant vertical distance between two adjacent contours, is called.

horizontal interval

horizontal equivalent

vertical equivalent

contour interval

⇒ The suitable contour interval for a map with scale 1 : 10000 is

2 m

5m

10 m

20 m

⇒ The method of reversal.

is usually directed to examine whether a certain part is truly parallel or perpendicular to another

makes the erroneous relationship between parts evident

both (a) and (b)

neither (a) nor (b).

⇒ Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves.

embankment on the centre line

excavation on the centre line

earth work on the centre line

none of these.

⇒ The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known.

a simple curve

a compound curve

a reverse curve

a vertical curve.

⇒ The best method of interpolation of contours, is by.

estimation

graphical means

computation

all of these.

⇒ In a closed traverse, sum of south latitudes exceeds the sum of north latitudes and the sum of east departures exceeds the sum of west departures, then, the closing line will lie in.

north-west quadrant

north east quadrant

south-east quadrant

south-west quadrant.

⇒ In chain surveying tie lines are primarily provided.

to check the accuracy of the survey

to take offsets for detail survey

to avoid long offsets from chain lines

to increase the number of chain lines.

⇒ A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to.

cumulative, + 0.11 m

compensating, Â± 0.11 m

cumulative, - 0.11 m

none of these

⇒ The distance between steps for measuring down hill to obtain better accuracy.

decreases with decrease of slope

increases with increase of slope

decreases with increase of slope

decreases with decrease of weight of the chain.

⇒ A theodolite is said to be in perfect adjustment if.

rotation axis is vertical to the transit axis

transit axis is perpendicular to line of collimation

line of collimation sweeps out a vertical plane while the telescope is elevated or depressed

all the above.

⇒ Metallic tapes are made of

Steel

Invar

Cloth and Nvires

Nickel

⇒ The theodolites used for making tacheometric observations by optical wedge system, are.

provided with stadia hairs in front of eye piece

not provided with stadia hairs at all

fitted with a glass wedge inside the telescope

fitted with a glass wedge in front of telescope.

⇒ The working edge of an alidade is known as

Ebonite edge

Fiducial edge

Straight edge

Graduated edge

⇒ The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known.

declination

azimuth

dip

bearing.

⇒ If the length of a chain line along a slope of θ° is

*l*, the required slope correction is.

2l cos2 Î¸/2

2l sin2 Î¸/2

l tan2 Î¸/2

l cos2 Î¸/2.

⇒ Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is.

10 cm

20 cm

30 cm

40 cm

⇒ During secular variation of magnetic meridian at different places.

range of oscillations is constant

period of oscillation is constant

range and period of oscillation both vary

period of oscillation only varies.

⇒ Whole circle bearing of a line is preferred to a quadrantal bearing merely because.

bearing is not completely specified by an angle

bearing is completely specified by an angle

Sign of the correction of magnetic declination is different in different quadrants

its trigonometrical values may be extracted from ordinary tables easily.

⇒ Resolving power of a telescope depends on.

the diameter of the aperture

the pupil aperture of the eye

the diameter of the object glass

all the above.

⇒ The smaller horizontal angle between the true meridian and a survey line, is known.

declination

bearing

azimuth

dip.

⇒ If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to

d

1/d

d2

1/d2

⇒ To avoid large centering error with very short legs, observations are generally made.

to chain pins

by using optical system for centering the theodolite

to a target fixed on theodolite tripod on which theodolite may be fitted easily

all the above.

⇒ The Huygen's telescope eye piece.

is aplanatic

achromatic

both (a) and (b)

neither (a) nor (b).

⇒ Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known.

plane surveys

geodetic surveys

geographical surveys

topographical surveys.

⇒ Which of the following errors can be eliminated by taking mean of bot face observations ?

error due to imperfect graduations

error due to eccentricity of verniers

error due to imperfect adjustment of plate levels

error due to line of collimation not being perpendicular to horizontal axis

⇒ The radius of curvature of the arc of the bubble tube is generally kept.

10 m

25 m

50 m

100 m

⇒ The temporary adjustment of a prismatic compass is

Centring

Adjustment of levels

Adjustment of needle

Adjustment of vane

⇒ In centesimal system circumference is divided Into

400 parts

360 parts

180 parts

240 parts