Worksheet 1

Question 0

Bothe the pneumatic and the electrical system use a live zero because:

Answer 0

It makes it possible to tell the difference between a dead instrument and one reading zero.

Question 1

The greatest advantage of the electrical 4-20mA over the pneumatic 3-15psi control system is:

Answer 1

No transmission lag

Question 2

The 4-20 mA dc output of an electric differential pressure transmitter is:

Answer 2

Linear with differential pressure.

Question 3

The most common electronics and pneumatic transmitter output signals are:

Answer 3

4-20 mA and 3-15 kpa respectively.

Question 4

Controller, two-positions

Answer 4

Controller, on/off

Question 5

Derivative

Answer 5

Rate

Question 6

Deviation

Answer 6

Error

Question 7

Final control element

Answer 7

Valve

Question 8

Proportional band adjustment

Answer 8

Gain

Question 9

Regulated by control valve

Answer 9

Manipulated variable

Question 10

Reset

Answer 10

Integral

Question 11

Set point

Answer 11

Desired valve

Question 12

State the three most important criteria that process plant instrumentation must address:

Answer 12

Safety, Environment, Standards and Production.

Question 13

Which of the following tasks are associated with process control?

Answer 13

Measurement, Comparison and Adjustment

Question 14

Automatic controllers operate on the difference between set point and measurement, which is called:

Answer 14

Error

Question 15

Which of the following have the ability to receive input, to perform a mathematical function with the input, and produce an output signal?

Answer 15

Controller

Question 16

The four most common process parameters measured at a typical resource processing plant:

Answer 16

Pressure, Level, Flow and Temperature