CHAPTER 11 INSTRUMENT TEST
1. An analyzer is a device used to:
a. measure or control flow, temperature, level or pressure.
b. measure physical and chemical compositions of materials.
c. send a signal a controller, recorder or indicator.
d. measure temperature changes in relationship to electrical resistance.
2. A process variable is best described as:
a. transmitter signal to an analytical controller
b. a process condition that is subject to change.
c. a variable process condition that is automated so fluctuations are eliminated.
d. the lag time in a pneumatic control loop
3. A level measurement device attached to a vessel that allows an operator to see the
corresponding liquid level:
a. sight glass gauge
b. rotameter
c. RTD
d. transmitter
4. A thermocouple is:
a. a wire composed of dissimilar metals that are connected at one end.
b. a resistive temperature detector used to measure temperature changes in
relationship to electrical resistance.
c. a device used to measure physical and chemical compositions.
d. a device designed to alert operators when a process variable exceeds established
parameters.
5. Draw a level control loop.
6. In a process control loop, a(n) ______________ can be transmitted over the longest
distance.
a. pneumatic signal
b. electrical signal
c. hydraulic signal
d. pneumatic – electrical signal
7. ______________ signals are usually transmitted in milliamperes.
a. pneumatic
b. electrical
c. hydraulic
d. pneumatic – electrical
8. A DP cell is an example of a:
a. controller
b. transmitter
c. transducer
d. converter
9. A control loop is:
a. a collection of instruments that work together to automatically control a process.
b. an electronic process flow diagram used to automatically control a process.
c. an electronic system that controls and monitors process variables.
d. a set of devices used to transmit one form of energy into another.
10. Draw a flow control loop.
11. The primary elements used to detect temperature include all of the following except:
a. thermocouple
b. resistance bulb
c. capillary tubing
d. helical bourdon
12. The primary elements used to detect direct level measurements include all of the
following except:
a. float and tape
b. conductivity probes
c. sight glass
d. displacer
e. bubbler system
13. The primary elements used to detect pressure measurements include all of the
following except:
a. cylindrical
b. helical
c. spiral
d. manometer
e. diaphragm
f. pressure transmitter
g. c-type
h. bellows
14. A controller is:
a. a device used to record process variables.
b. a device used to measure physical and chemical compositions.
c. a device designed to alert operators when a process variable exceeds established
parameters.
d. a device used to initiate change when a process variable moves out of established
guidelines.
15. A transducer is:
a. a device used to sense a process variable and produce a signal that is sent to a
control valve
b. a subsystem of a supervisory control system
c. a device used to sense a process variable and produce a signal that is sent to a
controller.
d. a device used to transmit one form of energy into another; typically pneumatic to
electrical or electrical to pneumatic.
16. A transmitter is:
a. a device used to sense a process variable and produce a signal that is sent to a
control valve
b. a subsystem of a supervisory control system
c. a device used to sense a process variable and produce a signal that is sent to a
controller.
d. a device used to transmit one form of energy into another; typically pneumatic to
electrical or electrical to pneumatic.
17. Weir and flume flow and level measuring devices are used to calculate flows that are not
enclosed in pipes:
a. true
b. false
18. Level measurements can be listed as continuous level measurement and
______________________________ .
a. single-point level detection
b. multi-point level detection
c. duplex conductivity detection
d. a & b
19. A circle with a line drawn horizontally across it with symbols above and below the line
indicate:
a. field mounted
b. electrical
c. mounted in a remote location
d. pneumatic
20. The symbol “PA” indicate:
a. process alarm
b. pressure alarm
c. process analyzer
d. pressure analyzer
21. A flow meter that allows fluid to move through a clear tube that has a ball or float in it.
a. sight glass gauge
b. rotameter
c. RTD
d. transmitter
22. A device used to record process variables:
a. controller
b. RTD
c. recorder
d. digitizer
23. The primary elements used to detect indirect level measurements include all of the
following except:
a. DP cell
b. conductivity probes
c. bubbler system
d. displacer
e. sight glass
f. continuous level detector gauge
g. float and tape
24. Draw a temperature control loop.
25. When an operator selects the desired process variable on a controller, it is referred to as:
a. the process target
b. the process guidelines
c. the process setpoint
d. the process cap
26. A nutating disc meter is composed of all the following components except:
a. counter
b. pointer
c. nutating disc
d. flow inlet
e. flow outlet
27. An oval gear meter roughly resembles a:
a. lobe pump
b. screw pump
c. vane pump
d. liquid ring compressor
28. The symbol for a shell and tube heat exchanger that is being used as a pre-heater has the
arrow:
a. pointed down
b. pointed up
c. horizontal
29. A computer graphics display is an electronic process flow diagram used to simplify
console operations.
a. true
b. false
30. A multiplexer is a device used to:
a. translate signals as they enter a data highway.
b. separate signals on a complex data highway.
c. change control schemes and modify control systems.
d. display bar and line graphs.
31. The symbol “FI” indicates:
a. flow instrument
b. flow indicator
c. pneumatic and electrical
d. float instrument
32. A corrugated metal tube that contracts and expands in response to pressure changes:
a. bellows pressure element
b. bourdon tube
c. DP cell
d. pressure transmitter
33. A hook shaped, thin walled tube attached to a mechanical linkage that expands and
contracts in response to pressure changes:
a. spiral
b. helix
c. bourdon tube
d. bellows pressure element
34. A rotameter is composed of all of the following components except:
a. tapered tube
b. scale
c. upper inlet
d. ball or float
e. lower inlet
35. The speed of the rotation is not proportional to the velocity of the fluid in a turbine flow
meter:
a. true
b. false
36. Draw a pressure control loop.
37. The symbol “FR” indicates:
a. float recognition
b. flow recording
c. flow recorder
d. flow rate
38. The symbol “PCV” indicates:
a. process control valve
b. process containment variable
c. pressure control valve
d. power carrier variable
39. The primary elements used to detect flow include all of the following except:
a. orifice plate
b. venturi tube
c. flow nozzle
d. oval gear
e. weir and level measuring device
f. thermal well
g. rotameter
40. A flow control loop most closely resembles:
a. thermocouple, transmitter, controller, transducer, control valve
b. orifice plate, transmitter, controller, transducer, actuator
c. venturi tube, transmitter, controller, transducer, control valve
d. b & c
Answer Key Chapter 11 Instruments