For numbers $39$ to $40$ :

In a carbon dioxide plant monoethanolamine is used to absorb $\backslash (\backslash$mathrm$\{$CO$\}\_\{2\}\backslash )$ from combustion gases. The solution is pumped from the storage tank to the absorption tower. The vertical distance from the tank surface to the spray nozzle is $20$ ft $.$ The line consists of $30$ ft straight pipe of $1$ in standard steel, $6$ standard elbows, and $2$ gate valves.

To measure the rate of flow a $\backslash (1/4\backslash )$ in sharp edged orifice is installed the solution is delivered to the spray nozzle at a static pressure of $40$ psig in order to properly spray it$.$ Equilibrium conditions indicate perfect absorption when the fluid flow equals $8$ US gpm$.$

Specific Gravity $=1\mathrm{.}1$

Pump efficiency $\backslash (=60\backslash \%\backslash )$

Viscosity $\backslash (=0\mathrm{.}617\backslash$mathrm$\{$cP$\}\backslash )$

Motor efficiency $\backslash (=90\backslash \%\backslash )$

$39.$ What is the theoretical horsepower to pump the solution?

a$.0\mathrm{.}52$ hp

c$.0\mathrm{.}78$ hp

b$.0\mathrm{.}39$ hp

d$.0\mathrm{.}47$ hp

$40.$ Calculate the power cost per $24$ hour day at $5$ cents$/$kW$-$hr$.$

a$.31$ cents

c$.50$ cents

b$.45$ cents

d$.78$ cents