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Q1. | The error due to eccentricity of inner and outer axes can be eliminated by |

A. | reading both verniers and taking the mean of the two [Correct Answer] |

B. | taking both face observations and taking the mean of the two [Wrong Answer] |

C. | double sighting [Wrong Answer] |

D. | taking mean of several readings distributed over different portions of the graduated circle [Wrong Answer] |

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

⇒ Closed contours, with higher value inwards, represent a

depression

hillock

plain surface

none of the above

⇒ The survey, in which the curvature of earth is ignored, is called as

Plane survey

Geodetic survey

Geological survey

Aerial survey

⇒ A horizontal angle which a line makes with the true meridian through one of the extremities of the line is called

Bearing

True bearing

Imaginary bearing

Maimetic bearing

⇒ The resection by two point problem as compared to three point problem

gives more accurate problem

takes less time

requires more labour

none of the above

⇒ The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every.

100 sq. km of area

150 sq. km of area

200 sq. km of area

none of these.

⇒ If whole circle bearing of a line is 120°, its reduced bearing is.

S 20Â° E

S 60Â° E

N 120Â° E

N 60Â° E.

⇒ A correction for error due to refraction is

0-01 d

^{2}m

0-001 d

^{2}m

0.01122 d

^{2}m

0.078 d

^{2}m

⇒ Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to.

14.14

28.28 m

200 m

none of these.

⇒ Pick up the correct statement from the following :

in the earth's magnetic field, a magnetic needle rests in magnetic meridian

the angle between the true meridian and the magnetic meridian is called magnetic variation

one end of the magnetic needle supported at its centre of gravity tends to dip down towards the. nearer magnetic pole of the earth

all the above.

⇒ The first temporary adjustment to be done after setting up the plane table at any station will be

Orientation

Centring and levelling

Levelling

Sighting

⇒ Overturning of vehicles on a curve can be avoided by using

compound curve

vertical curve

reverse curve

transition curve

⇒ Principle of surveying followed to prevent accumulation of errors is

To work from whole to the part

To work from part to whole

Both (A) and (B)

None of the above

⇒ Horizontal distances obtained by thermometric observations

require slope correction

require tension correction

require slope and tension corrections

do not require slope and tension corrections

⇒ The rise and fall method of reduction of levels, provides a check on.

back sights

fore sights

intermediate sights

all of these.

⇒ Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of the above

⇒ If θ is the slope of the ground and

*l*is the measured distance, the correction is.

2l sin2 Î¸/2

2l cos2 Î¸/2

2l tan2 Î¸/2

2l cot2 Î¸/2.

⇒ Contour interval is

the vertical distance between two con-secutive contours

the horizontal distance between two consecutive contours

the vertical distance between two points on same contour

the horizontal distance between two points on same contour

⇒ There are two stations

*A*and

*B*. Which of the following statements is correct :

the fore bearing of AB is AB

the back bearing of AB is BA

the fore and back bearings of AB differ by 180Â°

all the above.

⇒ The zero of the graduated circle of a prismatic compass is located at.

north end

east end

south end

west end.

⇒ The line of collimation method of reduction of levels, does not provide a check on.

intermediate sights

fore sights

back sights

reduced levels.

⇒ If the true bearing of a line AB is 269° 30', then the azimuth of the line AB is

0° 30'

89° 30'

90° 30'

269° 30'

⇒ Magnetic meridian and true meridian are

Always parallel

Parallel at the equator

Parallel near the poles

Never parallel

⇒ 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.

⇒ The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is.

3.290 m

3.300 m

3.275 m

2.790 m

⇒ In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to.

ease of reduction of observations

facility of holding

minimum effect of careless holding on the result

none of these.

⇒ Greater accuracy in linear measurements, is obtained by.

tacheometry

direct chaining

direct taping

all the above.

⇒ Removal of parallax, may be achieved by focussing.

the objective

the eye-piece

the objective and the eye-piece

none of these.

⇒ The position of point can be fixed more accurately by

Perpendicular offset

Optical square

Prism square

Oblique offsets

⇒ Setting out a curve by two theodolite method, involves.

linear measurements only

angular measurements only

both linear and angular measurements

none of these.

⇒ 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.