1. The speed of flow of water through a long cylindrical pipe of diameter 2 cm so that become turbulent is (Assume at temperature of $20^{\circ} C$ viscosity $\eta=1 \times 10^{-3} Pa.s$, Reynolds's number = 3000)
1) $1.5 m / s$
2) $0.15 m / s$
3) $2 m / s$
4) $1 m / s$
2. Water is flowing through a tube of diameter 1 cm at $8 cm / s$. Taking $\eta=10^{-2} poise$, the type of flow of liquid and Reynold's number are
1) Streamline, 80
2) Streamline, 800
3) Turbulent, 8000
4) Turbulent, 9000
3. The maximum average velocity of water required for streamline flow of liquid passing through a tube of radius 1.25 cm should be [Coefficient of viscosity of water is $1 \times 10^{-3} deca poise$]
1) 8 m/s
2) $0.8 m / s$
3) $0.08 m / s$
4) $0.008 m / s$
4. When the velocity of liquid is more than the critical velocity, the flow of liquid is
1) Streamline
2) Sometimes streamline, sometimes turbulent
3) Laminar