302. With a clinging nappe of a weir, the excess discharge, is
A. 6% to 7%
B. 8% to 10%
C. 18% to 20%
D. 25% to 30%

---

303.  The notch angle for maximum discharge over a triangular notch, is
A. 30?
B. 60?
C.900
D.1200

---

304.  A triangular notch is preferred to a rectangular notch because
A. only one reading is required
B. its formula is simple to remember
C. it gives more accurate results for low discharge
D. all the above.

---

305. Manning's formula is used for
A. flow in open channels
B. head loss due to friction in open channels
C. head loss due to friction in pipes flowing full
D. flow in pipes.

---

306.  A stepped notch is a combination of
A. rectangular notches of different sizes
B. triangular notches of different sizes
C. rectangular and triangular notches
D. all the above.

---

307. The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is
A. 1/2
B. 2/3
C. 3/2
D. 3/4.

---

308.  The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is
A. 2/3
B. 3/2
C. 2/5
D. 5/2.

---