CE Quiz 54

A model of a boat is built to a scale of 1 : 20, they experience a resistance of 1N. what is the resistance experience by the actual boat ?

If 7 variables in a physical phenomenon contains 4 fundamental dimensions, then the variables can be arranged into ----------- number of dimensionless terms

Select the incorrect statement

Weber’s number is the ratio of inertial force to the

5 Mach number is equal to

Distorted models are needed for

Flow around an underwater structural component is to be studied in a 20 °C-wind tunnel with a 10:1 scale model. What speed should be s tunnel to simulate an actual 10 °C water speed of 5.0 m/s? Take kinematic viscosity of water as 1.31 × 10^–6 m²/sec and 1.51 × 10^–5 m²/sec °C respectively.

Two geometrically similar pumps are running at the same speed of 150 rpm and lifting water against the heads of 36.0 m and 49.0 m respectively. First pump is having an impeller diameter of 240 mm. The impeller diameter of second pump shall be

When the Mach number is less than unity, the flow is called: