The main advantage of the chain survey over the prismatic compass survey is that the former

A. yields relatively more accurate results

B. involves highly more portable equipment

C. does not require a base map

D. closes its boundaries with no correction

The main use of the Abney Level in surveying is to determine the

A. angle of inclination

B. relative location

C. area coverage

D. spot height

A typical example of landforms produced by marine erosion is a

A. beach

B. spit

C. mud-flat

D. stack

When the gradient of a river channel changes from a steep to a gentle angle, the main activity of the river will be

A. depositing

B. eroding

C. deepening

D. terracing

The period when the earth is furthest from the sun is

A. aphelion

B. summer

C. perihelion

D. spring

A traveller crossing the international Date Line from America to Asia at 12 midnight on Sunday, would have to change his watch to 12 midnight on

A. Sunday

B. Monday

C. Tuesday

D. Saturday

Lakes formed as a result of landslides, screes or avalanches are known as

A. man-made lakes

B. barrier lakes

C. caldera lakes

D. rock-hollow lakes

In many areas, limestone rocks are resistant to water erosion on their surfaces and form uplands because of their

A. coarse and resistant minerals

B. low porosity and permeability

C. dense and armophous structure

D. joints and pervious nature

Fluid, basic lava flow is likely to give rise to a volcanic

A. dome

B. cinder cone

C. shield

D. saddle reef

Urban floods are mainly caused by

A. construction of dams and barrages

B. clearance of vegetation on farmlands

C. blockage of drains and waterways

D. establishment of shelter belts