| An orifice is called a large orifice if water head, is |
A) twice the diameter of the orifice
B) thrice the diameter of the orifice
C) four times the diameter of the orifice
D) five times the diameter of the orifice
| For maximum discharge over a triangular notch, the angle of the notch should be |
A) 30°
B) 60°
C) 90°
D) 120°
| Surge tanks are used |
A) for storage of water
B) to increase the velocity in a pipe
C) as overflow valve
D) to guard against water hammer
| For a broad-crested weir, if discharge is maximum for available head of 24 m, then what would be the critical depth of weir? |
A) 8 m
B) 12 m
C) 16 m
D) 24 m
| The discharge through a v-notch varies with the depth of water H as |
A) H
B) H1/2
C) H5/2
D) H3/2
| A surge tank is provided in a hydro power scheme to i. reduce pressure forces during the acceleration of the large water masses ii. provide additional storage close to the penstock |
A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) Neither (i) nor (ii)
| A convergent mouth piece has the maximum value of coefficient of discharge (Cd) is about |
A) 0.60
B) 0.95
C) 0.80
D) 0.50
| The coefficient of discharge for an external mouthpiece depends upon |
A) Velocity of liquid
B) Pressure of liquid
C) Area of mouthpiece
D) Length of mouthpiece
| Orifice meter is used to measure |
A) pressure
B) velocity
C) volume
D) volume rate of flow
| In a free nappe, |
A) The pressure below the nappe is atmospheric.
B) The pressure below the nappe is negative.
C) The pressure above the nappe is atmospheric.
D) The pressure above the nappe is negative.
