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

---