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Q1. | Prismatic compass is considered more accurate than a surveyor's compass, because. |

A. | it is provided with a better magnetic needle [Wrong Answer] |

B. | it is provided with a sliding glass in the object vane [Wrong Answer] |

C. | its graduations are in whole circle bearings [Wrong Answer] |

D. | it is provided with a prism to facilitate reading of its graduated circle [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are known as.

cadastral surveys

city surveys

topographical surveys

guide map surveys

⇒ If

*i*is the stadia distance,

*f*is the focal length and

*d*is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is.

f/i

i/f

(f + d)

f/d.

⇒ The first temporary adjustment of a prismatic compass is

Levelling

Focussing of the prism

Removing the parallax

Centring

⇒ The curvature of the earth's surface is taken into account only if the extent of survey is more than

80 sq. km

500 sq. km

260 sq. km

1500 sq. km

⇒ The lens equation 1/f = 1/f

_{1}+ 1/f

_{2}is applicable

when the thickness of the lens is small

only to conjugate distances along the principal axis

the computed quantities are accurate enough for geometrical optics of simple distances

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

⇒ 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).

⇒ Perpendicularity of an offset may be judged by eye, if the length of the offset is.

5 m

10 m

15 m

20 m

⇒ Pick up the correct statement from the following :

If the slope of the curve of a mass diagram in the direction of increasing abscissa is downward, it indicates an embankment

The vertical distance between a maximum ordinate and the next forward maximum ordinate represents the whole volume of the embankment

The vertical distance between a minimum ordinate and the next forward maximum ordinate represents the whole volume of a cutting

all the above.

⇒ In levelling operation,

The first sight on any change point is a back sight

The second sight on any change point is a fore sight

The line commences with a fore sight and closes with a back sight

The line commences with a back sight and closes with a foresight.

⇒ The power of a lens.

is reciprocal of its focal length

is positive if it is a convex lens

is negative if it is a concave lens

is measured in diopter.

⇒ Geodetic surveying is undertaken.

for production of accurate maps of wide areas

for developing the science of geodesy

making use of most accurate instruments and methods of observation

all the above.

⇒ The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known.

balancing the sights

balancing the departures

balancing the latitudes

balancing the traverse.

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

making angular measurements

drawing perpendiculars with a chain

solution of triangles

all the above.

⇒ 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.

⇒ With the rise of temperature, the sensitivity of a bubble tube

decreases

increases

remains unaffected

none of the above

⇒ If the whole circle bearing of a line is 180°, its reduced bearing is.

S 0Â° E

S 0Â° W

S

N.

⇒ If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as.

direct vernier

double vernier

retrograde vernier

simple vernier.

⇒ The principle of working of an optical square is based upon

Refraction

Reflection

Double refraction

Double reflection

⇒ Select the incorrect statement.

The true meridians at different places are parallel to each other.

The true meridian at any place is not variable.

The true meridians converge to a point in northern and southern hemispheres.

The maps prepared by national survey departments of any country are based on true meridians.

⇒ The error due to bad ranging is

Compensation

Cumulative positive

Cumulative negative

Both (B) and (C) above

⇒ A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is down

vertical circle is to its right and the bubble of the telescope is up

vertical circle is to its left and the bubble of the telescope is down

vertical circle is to its left and the bubble of the telescope is up

⇒ The direction of a line relative to a given median is called

Angular direction

Bearing

Deviation

Inclination

⇒ If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated

on its outer spindle with a relative motion between the vernier and graduated scale of lower plate

on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate

on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate

⇒ Permanent adjustments of a level are.

2 in number

3 in number

4 in number

5 in number

⇒ A discrepancy is the difference between

True value and error

Measured value and actual value

Two measured values of the same quantity

None of the above

⇒ When a chain is used at a temperature more than the temperature it was calibrated the error in measured length will be

Cumulative

Compensating

Negative

Observational error

⇒ The conventional sign shown in below figure represents a

bridge carrying railway below road

bridge carrying road below railway

bridge carrying road and railway at the same level

a level crossing.

⇒ The diaphragm of a stadia theodolite is fitted with two additional.

horizontal hairs

vertical hairs

horizontal and two vertical hairs

none of these.

⇒ If the long chord and tangent length of a circular curve of radius

*R*are equal the angle of deflection, is.

30Â°

60Â°

90Â°

120Â°