Deck 11: Surveying and Measurement Techniques: Part A

Question 1

A tie line in a chain surveying

A)checks the accuracy of the framework
B)enables the surveyor to locate the interior details which are far away from the main chain lines
C)fixes up the directions of all other lines
D)all of the above

Answer 1

enables the surveyor to locate the interior details which are far away from the main chain lines

Question 2

Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.

Answer 2

True

Question 3

Contour lines cross ridge or valley lines at

A)30°
B)45°
C)60°
D)90°

Answer 3

90°

Question 4

The instrument used for setting out an offset at a right angle, is called

A)open cross-staff
B)french cross-staff
C)adjustable cross-staff
D)optical square

Question 5

The fundamental principle of surveying is to work from the

A)whole to the part
B)part to the whole
C)lower level to higher level
D)higher level to lower level

Question 6

In levelling, the effect of refraction may be taken as

A)one-half
B)one-third
C)one-fifth
D)one-seventh

Question 7

The latitude of a traverse line is obtained by multiplying its length with the cosine of its reduced bearing.

A)Correct
B)Incorrect

Question 8

In a whole circle system, the bearing of a line is measured

A)always clockwise from the south point of the reference meridian towards the line right round the circle
B)clockwise or anticlockwise from the east or west whichever is nearer the line towards north or south
C)clockwise or anticlockwise from the north or south whichever is nearer the line towards east or west
D)none of the above

Question 9

The horizontal angle between the true meridian and magnetic meridian is known as

A)true bearing
B)dip
C)local attraction
D)magnetic declination

Question 10

When the magnetic bearing of the sun at noon is 185° 20', the magnetic declination will be

A)5° 20' east
B)5° 20' west
C)5° 20' north
D)5° 20' south

Question 11

The optical square is used to measure angles by

A)refraction
B)reflection
C)double refraction
D)double reflection

Question 12

The multiplying constant for the tacheometer is, generally, kept as

A)20
B)40
C)60
D)100

Question 13

The projection of a traverse line on a line parallel to the meridian is known as

A)latitude
B)departure
C)bearing

Question 14

Direct ranging is possible only when the end stations are

A)close to each other
B)not more than 100 m apart
C)mutually intervisible
D)located at highest points in the sea

Question 15

The index glass in an optical square is

A)wholly silvered
B)wholly unsilvered
C)one-fourth silvered and three-fourth unsilvered
D)half silvered and half unsilvered

Question 16

The method of intersection in plane tabling is commonly used for

A)locating the distant and inaccessible points
B)locating the broken boundaries
C)locating the points which may be used subsequently as the instrument stations
D)all of the above

Question 17

A scale which has a common representative fraction, but read in different measures, is called a

A)plain scale
B)diagonal scale
C)shrunk scale
D)comparative scale

Question 18

When the position of a point is to be fixed most accurately, it should be located by oblique offsets.

Question 19

In levelling, the correction for combined curvature and refraction (in metres) is equal to

A)0.00785 D2
B)0.0785 D2
C)0.0112 D2
D)0.0673 D2

Question 20

In locating the details of inaccessible objects visible atleast from transit stations, the method used is

A)by angles and distances from the same station
B)by angle from one station and distance from the other station
C)by distances from two different stations
D)none of the above

Question 21

In geodetic surveying, the curvature of the earth is taken into consideration.

A)Agree
B)Disagree

Question 22

The height of instrument is the height of the centre of the telescope above the ground where the level is set up.

Question 23

When the image formed by the objective is not situated in the plane of cross-hairs,

A)the cross-hairs should be adjusted
B)the eye-piece should be focussed
C)the objective should be focussed
D)the parallex should be removed

Question 24

The magnitude of super-elevation depends upon the speed of the vehicle and the radius of the curve

A)Correct
B)Incorrect