Figure $2.$ Measuring pressure within the container

$2\mathrm{.}4$ A water tank is pressurized by air, where a multifluid manometer is used to measure the pressure as shown in Figure $3.$ The tank is placed on a hilltop at an elevation of $1248m$ and the atmospheric pressure is $96$kPa. Calculate the air pressure inside the tank if $h_1=0\mathrm{.}15m,h_2=0\mathrm{.}25m$ and $h_3=0\mathrm{.}40m.$ Assume the density of water to be $1000k\frac{g}{m^3},$ for oil to be $900k\frac{g}{m^3}$ and for mercury to be $13600k\frac{g}{m^3}.$

igure $3.$ Measuring with multifluid manometer

$[14$ Marks$]$

QUESTION $3$

A liquid with a density of $1180k\frac{g}{m^3}$ and viscosity of $0\mathrm{.}0045N.\frac{s}{m^2}$ is flowing at $10\frac{m^3}{h}$ through a horizontal pipe with a diameter of $6mm.$ Calculate the Reynoids number. What type of flow is it$?$

$[10$ Marks$]$

QUESTION $4$

A certain liquid has a specific gravity of $0\mathrm{.}785$ and flows into pipe $1$ at a flow rate of $8\mathrm{.}35\frac{m^3}{h}$ as depicted in Figure $4.$ The liquid emerges at pipe $3$ and divides equally. The steel pipes are schedule $40$ pipe. Calculate:

$4\mathrm{.}1$ The total mass flow rate in pipe $1$ and pipes $3.$

$4\mathrm{.}2$ The average velocity in pipe $1$ and pipes $3.$

$(4)$

$4\mathrm{.}3$ The mass velocity in pipe $1.$

$(2)$