1
Q
- The operator interface unit allows the operator to monitor process conditions and manipulate set points of the process operation. The operator interface unit is located in a central control room. From this location the operator can:
1) View information transmitted from the processing area on an output device such as a video monitor
2) Start the process
3) Change control conditions from input devices such as a keyboard, mouse or touch screen.
4) Light boilers and Heaters
a. 1
b. 1, 2
c. 1, 3
d. 1, 4
A
c. 1, 3
2
Q
- The measurement and control components of the system are distributed at locations throughout the process area and perform two functions at each location:
1) The measurement of analog and/or digital inputs
2) Control globe valves
3) View information transmitted from the processing area on an output device such as a video monitor
4) Generation of output signals to actuators that can change process conditions.
a. 1, 4
b. 1, 2, 4
c. 3, 4
d. 1, 2, 3, 4
A
a. 1, 4
3
Q
- In newer systems the panel boards and consoles of an older analog system are eliminated and the communications are over a shared cable. The shared cable arrangement is called a ________ _____.
a. communication wire
b. contact lead
c. data highway
d. pneumatic tubing
A
c. data highway
4
Q
- List five components of a DCS system:
- Transmitters
- Final control elements
- Printer
- Keyboard
- Operators console
- Controllers
- Input/output cards
a. 1, 2, 3, 4, 5
b. 1, 2, 4, 6, 7
c. 1, 2, 3, 6, 7
d. 1, 2, 5, 6, 7
A
d. 1, 2, 5, 6, 7
4
Q
- Programmed algorithms are called function blocks and include proportional, integral, and ______ functionality.
a. alarming
b. controlling
c. derivative
d. shutdown
A
c. derivative
4
Q
- The operator interface unit allows operating personnel and process control engineers to alter the setpoint at which the process is controlled.
a. True
b. False
A
a. True
5
Q
- The three principle components of the operator station are:
1) Video monitor
2) Coffee pot
3) Keyboard
4) Recording charts
5) Mouse/trackball
a. 1, 2, 3
b. 2, 3, 4
c. 1, 3, 5
d. 3, 4, 5
e. 2, 3, 5
A
c. 1, 3, 5
6
Q
- From a graphic display, an operator may have the ability to:
1) Start or stop a boiler
2) Change the setpoint of the boiler master or drum level
3) Communicate with outside operators
4) Place any loop in manual or automatic mode
5) Change chart paper
a. 1, 2, 5
b. 2, 3, 4
c. 1, 2, 4
d. 3, 4, 5
e. 2, 3, 5
A
c. 1, 2, 4
6
Q
- The faceplate displays ____ ___ when a particular process loop is addressed on the graphic display.
a. disappear
b. pop up
c. go dim
d. change shape
A
b. pop up
6
Q
- Trend displays are the DCS equivalents of ______ ______ .
a. message boards
b. chart recorders
c. answering machines
d. controllers
e. transmitters
A
b. chart recorders
7
Q
- It is the responsibility of the ______ to acknowledge the alarm, and decide on the appropriate course of action.
a. process engineer
b. supervisor
c. operator
d. security
A
c. operator
8
Q
- An automatic shutdown is controlled by either the:
1) Central computer system
2) Operator
3) Programmable logic controller
4) Project engineering
a. 1, 2
b. 1, 3
c. 1, 3, 4
d. 1, 2, 3, 4
A
b. 1, 3
9
Q
- List 4 DCS input devices:
A. Keyboard
B. Calculator
C. Mouse
D. Track ball
E. Pen
F. Touch screen
a. A, D, E, F
b. A, C, D, F
c. A, B, D, F
d. A, C, D, E
A
b. A, C, D, F
10
Q
- Programmable logic controllers (PLCs) were originally designed to control processes that required a ____________ to be followed.
a. normal tracking device
b. sequence of events
c. event happening
d. list
A
b. sequence of events
11
Q
- PLCs retrieve information from a process, and based upon the information at a particular point in time, generate a control signal.
a. True
b. False
A
a. True
12
Q
- PLCs are limited to controlling a single process and can control only one process at a time.
a. True
b. False
A
b. False
12
Q
- A microprocessor is an integrated circuit that fits on a single chip. It contains:
1) Arithmetic unit
2) Control circuitry
3) Time clock
4) Memory registers
5) Historic data
a. 1, 2
b. 1, 3
c. 1, 2, 4
d. 2, 3, 4, 5
A
c. 1, 2, 4
13
Q
- The control relay is an ___________ or electromechanical device.
a. electric
b. electrostatic
c. electromagnetic
d. electrospasmotic
A
c. electromagnetic
14
Q
- Ladder logic is used extensively when __________ PLC’s.
a. operating
b. manipulating
c. programming
d. reading
A
c. programming
15
Q
- List the four main elements of a RTU:
1) Microprocessor
2) Memory
3) Master terminal unit
4) Input/output terminals
5) Data highway
6) Power supply
a. 1, 2, 3, 4
b. 1, 3, 4, 5
c. 1, 2, 4, 6
d. 2, 3, 4, 5
A
c. 1, 2, 4, 6
15
Q
- List the three main elements of SCADA:
1) Remote terminal unit (RTU)
2) Controller
3) Transmitter
4) Master terminal unit (MTU)
5) Modem
a. 1, 2, 3
b. 1, 4, 5
c. 1, 2, 4
d. 2, 3, 4
A
b. 1, 4, 5
16
Q
- List four action available via an RTU:
1) Adjust tuning values
2) Download configurations
3) Upload a historical data
4) See the weather channel
5) Change RTU parameters
6) Manipulate the process
a. 1, 2, 3, 4
b. 1, 3, 4, 6
c. 2, 3, 5, 6
d. 2, 3, 4, 5
A
c. 2, 3, 5, 6
17
Q
- Identify four communication paths for RTU’s:
1) On dedicated wires which run directly from the RTU to the central computer
2) Via a data highway
3) Through the telephone system, using modems
4) Using radio
5) Microwave signals
6) Satellite links
a. 1, 2, 3, 4
b. 1, 3, 5, 6
c. 1, 2, 4, 6
d. 1, 3, 4, 5
A
d. 1, 3, 4, 5
