$1)$ The ultrasonic instrument uses $\_\_\_\_\_\_\_\_\_\_\_$ method to determine the level of foods or pharmaceuticals in a container

a$)$invasive

b$)$ non$-$invasive

C$)$ both

$2)$ 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

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