Bernoulli's law Quiz 1

Question 1

Ravi took a flow meter and then he first checked the volume of the liquid present in the flow meter flowing out per second $$\left( Q \right)$$ and noted the value. After that, he connects a new manometer whose height is twice the previous manometer. So what will be the change in the new volume of the liquid flowing out per second $$\left( Q \right)$$? Assume that there is no change in the cross-sectional area of the flow meter.

Accepted Answer

$$Q'=\sqrt{2}Q$$

Answer

$$Q'=\sqrt{3}Q$$

Answer

$$Q'=3Q$$

Answer

$$Q'=2Q$$

Question 2

Bernoulli’s principle states that the sum of pressure energy, __ and kinetic energy per unit volume of a __, __fluid in a ___ irrational flow remains ___ along a streamline.

Accepted Answer

Potential energy, incompressible, non-viscous, streamlined, constant

Answer

Thermal energy, incompressible, non-viscous, streamlined, constant

Answer

Potential energy, compressible, viscous, non-streamlined, different

Answer

Thermal energy, compressible, viscous, non-streamlined, different

Question 3

What will be the velocity head of the container in the CGS unit, if the speed of the efflux from the side of a container is $$2.5\,	ext{m}{{	ext{s}}^{	ext{-1}}}$$ and the container is opened to the atmosphere?

Accepted Answer

$$	ext{312}5	ext{ cm}$$

Answer

$$1243\,	ext{cm}$$

Answer

$$2267\,	ext{cm}$$

Answer

$$	ext{2}282	ext{ cm}$$

Question 4

What will be the pressure energy obsessed by water at the height of $$70\,	ext{cm}$$ from the ground level and its speed is $$0.4\,	ext{m}{{	ext{s}}^{	ext{-1}}}$$ ? Assume that the total energy possessed by the water molecule is $$300\,	ext{J}$$and mass is $$1\,	ext{kg}$$. $$($$Take $$g=10\,	ext{m}{{	ext{s}}^{	ext{-2}}})$$

Accepted Answer

$$292.9\,	ext{J}$$

Answer

$$287.4\,	ext{J}$$

Answer

$$267.8\,	ext{J}$$

Answer

$$273.3\,	ext{J}$$

Question 5

What will be the amount of kinetic energy to raise water from ground level to $$4\,	ext{m}$$ above by the motor if the density of water is $$1.2\,	ext{kg}{{	ext{m}}^{	ext{-3}}}$$and the pressure exerted to raise the water to above level is $$5.2\,	ext{Pascal}$$ ? Assume that the total energy exerted by the motor is $$100\,	ext{J}$$. $$($$Take $$g=10\,	ext{m}{{	ext{s}}^{	ext{-2}}})$$

Accepted Answer

$$46.8\,	ext{J}$$

Answer

$$47.2\,	ext{J}$$

Answer

$$43.6\,	ext{J}$$

Answer

$$48.6\,	ext{J}$$