Deck 15: Surveying Terminology and Techniques: Part C

Question 1

In order to measure a horizontal angle more accurately than a vernier, a

A)method of repitition is used
B)method of reiteration is used
C)method of deflection angles is used
D)method of double observations is used

Answer 1

method of repitition is used

Question 2

An axis about which the telescope can be rotated in a horizontal plane, is called

A)horizontal axis
B)vertical axis
C)axis of the level tube
D)line of collimation

Answer 2

vertical axis

Question 3

A simple circular cruve is designated by the

A)radius of the curve
B)cruvature of the curve
C)angle subtended at the centre by a chord of any length
D)angle subtended at the centre by a chord of particular length

Answer 3

angle subtended at the centre by a chord of particular length

Question 4

454A check 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

Question 5

In a duadrantal 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 wouth whichever is nearer the line towards east or west
D)none of the above

Question 6

An arbitrary surface with reference to which the elevation of points are measured and compared, is called

A)datum surface
B)level surface
C)horizontl surface
D)vertical surface

Question 7

The error in measured length due to incorrect holding of chain is

A)compensating error
B)cumulative error
C)instrumental error
D)negative error

Question 8

At the equator, the amount of dip is

A)0°
B)45°
C)60°
D)90°

Question 9

A transition curve when inserted between the tangent and the circular curve

A)should meet the original straight tangentially
B)should meet the circular curve tangentially
C)the rate of increase of curvature along the transition curve should be same as that of increase of super-elevation
D)all of the above

Question 10

An imaginary line tangential to the longitudinal curve of the level at the centre of the tube is called

A)horizontal axis
B)vertical axis
C)axis of the level tube
D)line of collimation

Question 11

Which of the following statement is wrong?

A)The distance measured parallel to the north-south line is called latitude of the line.
B)The distance measured parallel to the east-west line is called departure of the line.
C)The latitude is positive when measured downward or southward.
D)The departure is negative when measured to the left or westward.

Question 12

The traversing by the method of deflection angles is chiefly used in

A)canals
B)highways
C)railways
D)all of these

Question 13

The magnification of a telescope is the ratio of the angle subtended at the eye by the virtual image of the object to that subtended by the object.

A)Correct
B)Incorrect

Question 14

If any closed traverse, if the survey work is correct, then

A)the algebraic sum of latitudes should be equal to zero
B)the algebraic sum of departures should be equal to zero
C)the sum of northings should be equal to the sum of southings
D)all of the above

Question 15

The image produced by the telescope will be dull, if it has

A)dull
B)bright

Question 16

The line of collimation should be

A)vertical
B)horizontal

Question 17

In indirect method of contouring, the best method of interpolation of contours is

A)by graphical method
B)by estimation
C)by arithmetical calculation
D)all of these

Question 18

When (h) is the difference in heights between the extremities of a chain length (l), then the correction for slope required is

A)h / l
B)h2 / l
C)h2 / 2l
D)h / el

Question 19

The instrument attached to the wheel of a vehicle in order to measure the distance travelled, is called

A)passometer
B)pedometer
C)odometer
D)speedometer

Question 20

An average length of a pace is

A)60cm
B)80 cm
C)100 cm
D)120 cm

Question 21

When the curve is to be set out over a rough ground, the method used is

A)Rankine's method
B)two theodolite method
C)tacheometric method
D)either (b) or (c)

Question 22

The capability of showing small angular movements of the level rube vertically, is called its sensitivity.

A)Right
B)Wrong

Question 23

The difference between the sum of the angles of a apherical triangle on the earth's surface and the angles of the corresponding plane triangle for every 195.5 km ²of area is only

A)1 second
B)5 second
C)10 second
D)15 second

Question 24

Rise and fall method is used in.

A)profile levelling
B)differential levelling
C)check levelling
D)none of these