PO Instrumentation & Measurement

Question 1

What does a differential pressure transmitter measure?

Accepted Answer

The difference in pressure between two points in a system

Answer

The absolute pressure at a single measurement point

Answer

The temperature of a fluid using pressure correlation

Answer

The flow velocity at the pipe centerline

Question 2

Which type of flowmeter uses the principle of electromagnetic induction to measure the flow of conductive fluids?

Accepted Answer

Magnetic flowmeter

Answer

Turbine flowmeter

Answer

Vortex flowmeter

Answer

Coriolis flowmeter

Question 3

What is the primary purpose of a thermowell installed in a process pipe or vessel?

Accepted Answer

To protect the temperature sensor from direct contact with the process fluid

Answer

To amplify the temperature signal before transmission to the control room

Answer

To convert temperature directly into a 4-20 mA signal

Answer

To compensate for ambient temperature variations around the instrument

Question 4

A pressure gauge reads 50 psig. If local atmospheric pressure is 14.7 psia, what is the absolute pressure?

Accepted Answer

64.7 psia

Answer

35.3 psia

Answer

50.0 psia

Answer

100.0 psia

Question 5

Which instrument detects whether liquid is present or absent at a specific elevation inside a vessel?

Accepted Answer

Level switch

Answer

Pressure transmitter

Answer

Flow totalizer

Answer

Density meter

Question 6

What does PID stand for in the context of a process controller?

Accepted Answer

Proportional-Integral-Derivative

Answer

Process Integral Distribution

Answer

Pressure-Indicator-Display

Answer

Process Input Data

Question 7

An orifice plate installed in a process pipeline creates a measurable pressure drop used to determine which variable?

Accepted Answer

Flow rate

Answer

Temperature

Answer

Liquid level

Answer

Fluid density