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A venturimeter of 20 mm throat diameter is used to measure the velocity of water in a horizontal pipe of 40 mm diameter. If the pressure difference between the pipe and throat sections is found to be 30 kPa then, neglecting frictional losses, the flow velocity is
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- 0.2 m/s
- 1.0 m/s
- 1.4 m/s
- 2.0 m/s
Correct Option: D
We know, A1 V1 = A2 V2
| ƥ V2 = | V1 = | V1 | ||
| D22 | 4 |
∴ V2 = 4V1
Applying Bernoulli's Equation
| + | + z1 = | + | + z2 | |||||
| ρg | 2g | ρg | 2g |
| = | ||||
| eg | 2g |
| ƥ | = | |||
| 2 | 1000 |
ƥ V21 = 4
ƥ V1 = 2.0 m/s
So velocity of flow is 2.0 m/sec
