PROCESS CONTROL AND INSTRUMENTATION QUIZ

Both B & C

Orificemeter

Kennison nozzle

Open weir

Object and surrounding are at almost the same temperature

Enhancement or attentuation of redia-tion occurs in the sighting path

Object is transparent

Object has varying emissivity

Polished surface

Very thick walls

Low emissivity

High transmissivity of radiation

Is more affected by corrosive atmosphere

Can measure higher temperature

Can't measure the temperature of moving objects

Has a slower speed of response

The phase lag of a pure time delay system decreases with increasing frequency

The amplitude ratio of a pure time delay system increases with frequency

The frequency response of a pure capacity process is unbounded

The amplitude ratio of a pure capacity process is inversely proportional to frequency

< 1

< 0.1

< 3

> 3

All of these

Pressure

Viscosity

Volume

V-notch

Cipolletti weir

Rectangular weir

Orifice meter

None of these

>1

< 1

1

1/(Ts + 1)

S/(Ts + 1)

1/Ts

None of these