Profile levelling and differential levelling are alike in __________.
purpose
accuracy
field Procedure
principle
In secondary control triangulation, the check on base is not to exceed __________.
1:10000
1:15000
1:20000
1:50000
The constellation Cassiopeia is used as references to easing Polaris, the stars are formed like a letter __________.
W
X
Y
Z
The base meridian to which all azimuth of lines of the project shall be referred is called __________.
grid
primary
central
geodetic
In tertiary control of cadastral project, the instrument shall be oriented in a primary or secondary traverse lines of the project to the nearest __________.
1 second of arc
10 seconds of arc
20 seconds of arc
30 seconds of arc
In delimitation of reservation, parks and other protected areas, the unsurveyed claims shall be sketched and reflected in the plan in __________.
broken lines
light full lines
dotted lines
heavy lines
In differential levelling, the vertical distance from datum to the line of sight of the telescope is __________.
height of instrument
foresight reading
backsight reading
vertical rod reading
The uniform size of cadastral map is __________.
55 x 60 cm.
45 x 45 cm.
54 x 54 cm.
64 x 64 cm.
The vernier of engineers’ transit be set to 0°0’0″ reading with the use of __________.
