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Q1. | The apparent error on reversal is. |

A. | equal to the actual error [Wrong Answer] |

B. | twice the actual error [Correct Answer] |

C. | thrice the actual error [Wrong Answer] |

D. | none of these. [Wrong Answer] |

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

⇒ Magnetic declination at a point

Does not change with time

Never remains constant

Varies with time

(B) and (C) above

⇒ The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as.

line of sight

line of collimation

axis of the telescope

none of these.

⇒ Chain surveying is well adopted for.

small areas in open ground

small areas with crowded details

large areas with simple details

large areas with difficult details.

⇒ Contours of different elevations may cross each other only in the case of.

an over hanging cliff

a vertical cliff

a saddle

an inclined plane.

⇒ In a theodolite.

the telescope axis is perpendicular to transit axis

the axis of rotation is perpendicular to transit axis

the telescope axis, the transit axis and the rotation axis pass through the centre of theodolite

all the above.

⇒ 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

⇒ 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

⇒ Any arbitrarily assumed level line from which vertical distances are measured is known as

Level line

Vertical line

Horizontal line

Datum line

⇒ While surveying a plot of land by plane tabling, the field observations.

and plotting proceed simultaneously

and plotting do not proceed simultaneously

and recorded in field books to be plotted later

all the above.

⇒ Agate cap is fitted with a

cross staff

level

chain

prismatic compass

⇒ Bowditch rule is applied to

an open traverse for graphical adjustment

a closed traverse for adjustment of closing error

determine the effect of local attraction

none of the above

⇒ Which of the following methods of offsets involves less measurement on the ground?

method of perpendicular offsets

method of oblique offsets

method of ties

all involve equal measurement on the ground

⇒ The error due to eccentricity of inner and outer axes can be eliminated by

reading both verniers and taking the mean of the two

taking both face observations and taking the mean of the two

double sighting

taking mean of several readings distributed over different portions of the graduated circle

⇒ For high sensivity of the bubble tube.

a liquid of low viscosity is used

a liquid of low surface tension is used

the bubble space should be long

all the above.

⇒ Pantagraph is used for.

measuring distances

measuring areas

enlarging or reducing plans

setting out right angles

⇒ The error due to bad ranging is

Compensation

Cumulative positive

Cumulative negative

Both (B) and (C) above

⇒ 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.

⇒ 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

⇒ For indirect ranging, number of ranging rods required, is.

1

2

3

4

⇒ The co-ordinate of a point measured perpendicular to the parallel, is called.

total latitude

meridian distance

total departure

consecutive co-ordinate.

⇒ If the radius of a simple curve is 600 m, the maximum length of the chord for calculating offsets, is taken.

10 m

15 m

20 m

30 m.

⇒ In direct method of contouring, the process of locating or identifying points lying on a contour is called

ranging

centring

horizontal control

vertical control

⇒ In reciprocal levelling, the error which is not completely eliminated, is due to.

earth's curvature

non-adjustment of line of collimation

refraction

non-adjustment of the bubble tube.

⇒ The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called.

brightness of telescope

magnification of telescope

resolving power of telescope

none of these.

⇒ The limiting length of an offset does not depend upon.

accuracy of the work

method of setting out perpendiculars

scale of plotting

indefinite features to be surveyed.

⇒ In an internal focussing type of telescope, the lens provided is

concave

convex

plano-convex

plano-concave

⇒ Detailed plotting is generally done by

radiation

traversing

resection

all of the above

⇒ 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 surface of zero elevation around the earth, which is slightly irregular and curved, is known as.

mean sea level

geoid surface

level surface

horizontal surface.

⇒ The 'point of curve' of a simple circular curve, is.

point of tangency

point of commencement

point of intersection

mid-point of the curve