197. Total flow in stream is known

A. run off

B. stream flow

C. discharge

D. all the above.

198. Yield of a drainage basin is :

A. run off of the area expressed as instantaneous rate

B. average run off over a short period

C. total volume of water flowing annually

D. all the above.

199. The formula Q= P - K[1.8T + 32] in which Q is runoff,P is annual rain fall in cm, T is mean annual temperature in centigrades and K is a constant, is known

A. Justin's formula

B. Khosla's formula

C. English formula

D. Vermule's formula.

200. The equation 0.368 [PH 1.87 + 32^1in which Q is yearly run off in cm, P is yearly totaf rain all in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres is known as

A. English formula

B. Khosla's formula

C. Justin's formula

D. Vermule's formula.

201. m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by

A. velocity area method

B. weir or spillway method

C. use of venturi-meter

D. using power plant consumption,

202. Most important method for calculating discharge for planning a water supply project, is

A. velocity area method

B. weir or spillway method

C. use of venturi-meter

D. using power plant consumption

203. Most important source of water for public water supply, is from

A. lakes

B. ponds

C. streams

D. rivers

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