Deck 20: Surveying Techniques and Instruments

Question 1

The plotting of small areas which can be commanded from a single station, is usually done on the plane table by the method of

A)radiation
B)intersection
C)traversing
D)resection

Answer 1

radiation

Question 2

In the surveying telescopes, cross hairs are fitted in

A)centre of the telescope
B)optical centre of the eye piece
C)front of the eye piece
D)front of the objective

Answer 2

front of the eye piece

Question 3

A line normal to the plumb line at all points is known as

A)horizontal line
B)vertical line
C)level line
D)line of collimation

Answer 3

level line

Question 4

A back sight indicates the

A)shifting
B)setting up
C)height

Question 5

in measuring horizontal angles, the theodolite should be turned

A)clockwise from the forward station to the back station
B)clockwise from the back station to the forward station
C)anticlockwise from the forward station to the back station
D)anticlockwise from the back station to the forward station

Question 6

According to Lehman's rule of plane tabling

A)the distance to the point sought from each of the three rays is proportional to the distance of the three known points from the instrument station
B)when the instrument station is outside the great circle, the point sought is always on the same side of the ray drawn to the most distant point as the intersection of the other two rays
C)when looking in the direction of the reference points, the point sought is on the same side of each of the three rays
D)all of the above

Question 7

The brightness of the image

A)is directly proportional to
B)is inversely proportional to
C)varies directly as the square of
D)varies inversely as the square of

Question 8

An angle between the inclined line of sight and the horizontal is called

A)direct angle
B)vertical angle
C)horizontal angle
D)deflection angle

Question 9

The longest of the chain lines used in making a survey is generally regarded as a base line.

A)Agree
B)Disagree

Question 10

The line of collimation must be parallel to the horizontal axis.

Question 11

The horizon 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 12

In a prismatic compass, the zero of the graduated ring is located at

A)north end
B)south end
C)east end
D)west end

Question 13

In tachcometric method of setting out a curve, no chain or tape is used.

Question 14

The axis of bubble tube must be perpendicular to the vertical axis.

A)Right
B)Wrong

Question 15

When the length of offset is 20 m, it is called

A)short
B)long

Question 16

When the centres of the arcs lie on the opposite sides of the common tangent at the junction of the two curves, it is known as a

A)simple curve
B)vertical curve
C)compound curve
D)reverse curve

Question 17

The contour interval

A)should be constant
B)need not be constant

Question 18

When several contours coincide, it indicates

A)a vertical cliff
B)a valley
C)a ridge

Question 19

The instrument, belonging to a class of reflecting instrument, is

A)line ranger
B)box sextent
C)prismatic compass
D)all of these

Question 20

The positive error makes the measured distance

A)less than
B)more than

Question 21

The object of introducing a transition curve at each end of the circular curve is

A)to obtain a gradual increase of curvature from zero at the tangent point to the specified quantity at the junction of the transition curve with the circular curve
B)to provide a satisfactory means of obtaining a gradual increase of super-elevation from zero on the tangent point to the specified amount on the main circular curve
C)to accomplish gradually the transition from the tangent to the circular curve and from the circular curve to the tangent
D)all of the above