Ramsay Test Process Flow and Instrumentation 3

Question 1

A PID controller's 'derivative' action responds to:

Accepted Answer

The rate at which the error is changing

Answer

The size of the current error

Answer

The accumulated error over time

Answer

The setpoint value only

Question 2

Which instrument would you use to measure the level in a sealed pressurized tank using differential pressure?

Accepted Answer

A DP level transmitter with high and low side taps

Answer

A simple sight glass

Answer

A thermocouple

Answer

A pitot tube

Question 3

In a cascade control loop, the output of the primary (master) controller becomes the:

Accepted Answer

Setpoint of the secondary (slave) controller

Answer

Final valve position directly

Answer

Alarm trip point

Answer

Process variable of the master

Question 4

A thermocouple generates a measurable voltage based on the:

Accepted Answer

Temperature difference between two dissimilar metal junctions

Answer

Resistance change of a metal wire

Answer

Expansion of a bimetallic strip

Answer

Pressure of a sealed gas bulb

Question 5

On a P&ID, the abbreviation 'PSV' attached to a vessel most likely identifies a:

Accepted Answer

Pressure safety (relief) valve

Answer

Process sampling valve

Answer

Pump suction valve

Answer

Pneumatic shutoff valve

Question 6

If a flow controller is in 'manual' mode, the operator is directly setting the:

Accepted Answer

Controller output (valve position)

Answer

Process setpoint

Answer

Alarm limits

Answer

Measurement range

Question 7

A variable-area flowmeter that uses a float rising inside a tapered tube is commonly called a:

Accepted Answer

Rotameter

Answer

Venturi meter

Answer

Magnetic flowmeter

Answer

Coriolis meter