66) The knowledge of hydrology is necessary in civil engineering for

• (a) designing and construction of irrigation structures
• (b) designing and construction of bridges and culverts
• (c) flood control works
• (d) all of the above

67) The hydrology helps in

• (a) predicting maximum discharge
• (b) deciding capacity of reservoir
• (c) fore casting flood
• (d) all of the above

68) The science which deals with the physical features and conditions of water on the earth surface is called

• (a) hydrometry
• (b) hydrography
• (c) hydrosphere
• (d) hydraulics

69) The science which deals with the measurement of water is called hydrometry.

• (a) True
• (b) False

70) The earth’s water circulatory system, is known as

• (a) water cycle
• (b) hydrologic cycle
• (c) precipitation cycle
• (d) all of these