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Q1. | A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads. |

A. | azimuth of the forward line [Correct Answer] |

B. | bearing of the. forward line [Wrong Answer] |

C. | back bearing of the forward line [Wrong Answer] |

D. | equal to 360Â°-azimuth of the forward line. [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ The most reliable method of plotting a theodolite traverse, is.

by consecutive co-ordinates of each station

by independent co-ordinates of each station

by plotting included angles and scaling off each traverse leg

by the tangent method of plotting.

⇒ Pick up the correct statement from the following :

with both handles in his left hand, the chain man throws out the chain with his right hand and the second chain man assists him to free it from knots

the follower of the chaining operation should be more experienced than the leader

at the end of the tenth chain length, the two chain men meet and the ten arrows are handed over to the leader

all the above.

⇒ The scale on which three dimensions can be measured is known as

Plain scale

Diagonal scale

Chord scale

Vernier scale

⇒ A traverse deflection angle is.

A traverse deflection angle is

more than 90Â° but less than 180Â°

the difference between the included angle and 180Â°

the difference between the included angle and 180Â°

⇒ While working on a plane table, the correct rule is :

Draw continuous lines from all instrument stations

Draw short rays sufficient to contain the points sought

Intersection should be obtained by actually drawing second rays

Take maximum number of sights as possible from each station to distant objects.

⇒ An offset rod is provided at its top with

Hook

Flag

Distance measuring arrangement

None of these

⇒ The accuracy of measurement in chain surveying, does not depend upon.

length of the offset

scale of the plotting

importance of the features

general layout of the chain lines.

⇒ Pantagraph is used for.

measuring distances

measuring areas

enlarging or reducing plans

setting out right angles

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

linear measurements only

angular measurements only

both linear and angular measurements

none of these.

⇒ The difference between the included angle and 180°.

vision gets obstructed

chaining gets obstructed

both vision and chaining get obstructed

all the above.

⇒ If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be

true R.L.

more than true R.L.

less than true R.L.

none of the above

⇒ For true difference in elevations between two points

*A*and

*B*, the level must be set up.

at any point between A and B

at the exact mid point of A and B

near the point A

near the point B.

⇒ 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.

⇒ Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by.

degree of the curve

square of the degree of the curve

inverse of the degree of the curve

none of these.

⇒ The variation in mag,netic declination is termed as

Diurnal variation

Solar variation

Lunar variation

Secular variation

⇒ The apparent error on reversal is.

equal to the actual error

twice the actual error

thrice the actual error

none of these.

⇒ The radius of a simple circular curve is 300 m and length of its specified chord is 30 m. The degree of the curve is.

5.73Â°

5.37Â°

3.57Â°

3.75Â°.

⇒ Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

loss of magnetism of the needle

friction of the needle at the pivot

presence of magnetic substances near the instrument

⇒ From any point on the surface with a given inclination.

only one contour gradient is possible

two contour gradients are possible

indefinite contour gradients are possible

all the above.

⇒ 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

⇒ 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

⇒ The position of point can be fixed more accurately by

Perpendicular offset

Optical square

Prism square

Oblique offsets

⇒ The direction of steepest slope on a contour, is.

along the contour

at an angle of 45Â° to the contour

at right angles to the contour

none of these.

⇒ Contour interval is

inversely proportional to the scale of the map

directly proportional to the flatness of ground

larger for accurate works

larger if the time available is more

⇒ If the radius of a simple curve is

*R*, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

R/10

R/15

R/20

R/25.

⇒ Pick up the correct statement from the following :

mistakes arise from inattention, inexperience or carelessness

systematic errors persist and have regular effects in the survey performances

accidental errors occur inspite of every precaution is taken

all the above.

⇒ The adjustment of horizontal cross hair is required particularly when the instrument is used for

leveling

prolonging a straight line

measurement of horizontal angles

all of the above

⇒ One of the Lehmann's rules of plane tabling, is.

location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances

when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray

when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays

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.

⇒ 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.