Deck 11: Instruments

Question 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.

Answer 1

measure physical and chemical compositions of materials.

Question 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

Answer 2

a process condition that is subject to change.

Question 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

Answer 3

sight glass gauge

Question 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.

Question 5

Draw a level control loop.

Question 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

Question 7

______________ signals are usually transmitted in milliamperes.

A) pneumatic
B) electrical
C) hydraulic
D) pneumatic - electrical

Question 8

A DP cell is an example of a:

A) controller
B) transmitter
C) transducer
D) converter

Question 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.

Question 10

Draw a flow control loop.

Question 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

Question 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

Question 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

Question 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.

Question 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.

Question 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.

Question 17

Weir and flume flow and level measuring devices are used to calculate flows that are not enclosed in pipes:

Question 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

Question 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

Question 20

The symbol "PA" indicate:

A) process alarm
B) pressure alarm
C) process analyzer
D) pressure analyzer

Question 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

Question 22

A device used to record process variables:

A) controller
B) RTD
C) recorder
D) digitizer

Question 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

Question 24

Draw a temperature control loop.

Question 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

Question 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

Question 27

An oval gear meter roughly resembles a:

A) lobe pump
B) screw pump
C) vane pump
D) liquid ring compressor

Question 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

Question 29

A computer graphics display is an electronic process flow diagram used to simplify console operations.

Question 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.

Question 31

The symbol "FI" indicates:

A) flow instrument
B) flow indicator
C) pneumatic and electrical
D) float instrument

Question 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

Question 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

Question 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

Question 35

The speed of the rotation is not proportional to the velocity of the fluid in a turbine flow meter:

Question 36

Draw a pressure control loop.

Question 37

The symbol "FR" indicates:

A) float recognition
B) flow recording
C) flow recorder
D) flow rate

Question 38

The symbol "PCV" indicates:

A) process control valve
B) process containment variable
C) pressure control valve
D) power carrier variable

Question 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

Question 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