$2)$When selecting a Level sensor the following considerations are important

$$a$)$Is the material a Solid or liquid

b$)$Is the material compressible

c$)$Is the material flammable

d$)$All of the above

$3)$In an optical level sensor$,$the mode of measurement is

a$.$Retroreflective

b$.$Diffuse

c$.$Capacitive

d$.$Time of Flight

$4)$The hydrostatic pressure for $5$feet of water column

$$a$.25$Psi

b$.4\mathrm{.}56$Psi

c$.2\mathrm{.}17$Psi

d$.$None of the Above

$5)$An ultrasonic flow meter can measure the volume of liquid dispensed to a tank

a$.$By ultrasonic waves

b$.$By counting pulses per unit of volume

c$.$By determining the differential pressure

d$.$All of the above