Flashcards

Instrumentation Final

Rachel Thaemert English 103 cards

Cards in this deck (103)

1The flowmeter element that does NOT require any intrusion into the piping system to make its measurement is the ________ flow meter.Ultrasonic
2The anular area between the float and the tube of a rotometer is ________ with respect to flow.Variable
3The array type allows you to have multiple elements of the same type grouped together. What data type/structure type allows you to have multiple elements of different types grouped together in a single container? (Requires the proper name for credit)Cluster
4A standard Thermistor with a 10K curve, reading a resistance of 29K ohms, is detecting a temperature of approximately ______ degrees C0.1
5In the absence of any other data, the standard rule of thumb for inserting a flow meter into a flow stream is ____ pipe diameters up stream and ______ pipe meters downstream.10,5
6The flow meter in the selection that is NOT a velocity based flow meter is the ____ flow meter.Nutating Disk
7The rule of thumb for sampling with a data acquistion board, to ensure an accurate representation of the waveform being sampled, is how many samples per cycle?10
8Given a DC tachometer with a calibrated value of 7 volts per thousand RPM and a meter reading of 35 volts, what is the speed of the shaft being measured?5000
9Which NI data acquisition sampling method would you use if you wanted to return twenty five samples with each read, with each sample .001 seconds apart and each read cycle happened only once per day?Finite Samples
10The obstruction flow meter with the highest unrecoverable pressure loss is the ______ flow meter.Orifice
11Given the two traces shown below, the lower (red) trace is representative of a static pressure transducer.No
12Which of the following is NOT a type of load cell?Shear Doughnut
13You have a system with a full bridge where 2 gauges being stressed in the same axis, and 2 gauges are not stressed but mounted on the same type of material as the stressed gauges. In this system the total strain indicated by a strain indicator would be equal to _____% the actual strain in the part.200
14The following graph represents what kind of transducer error?Hysteresis
15Using the model of a transducer shown in class, there are a number of blocks between the physical condition being measured and the signal output. Block A of this model (shown below) represents which stage of the transducer?Sensing Unit
16Given the model of a transducer discussed in class (shown below) Block B of the model represents what stage of the transducer?Transducing Unit
17Once calibrated, the scale of a rotometer will give accurate readings regardless of the temperature or pressure of the air flowing through it.False
18The following graph represents what type of transducer error?Linearity
19A perbubation simulates an arithmetic Root Sum Square to provide a 95% envelope of expected outputs.True
20When generating a plot for calibration of a transducer using a multi point polynomial curve fit, the axis contained which data?X Axis - Volts, Y Axis - PSI
21A local variable can be shared between two programs just like a global variable.False
22The output of a type J thermocouple is a resistance that is slightly non-linear with respect to temperature.False
23A linear thermistor is a device consisting of a single temperature sensitive resistant element that generates a resistance inversly proportional to the temperaure sensed, along a linear line for its operating range.False
24In a filter circuit, the output voltage at the Fc point is ______ relative to the input voltage.-3db
25A pressure measurement taken of pressure inside a vessel, with the reference pressure being the room air outside the vessel, is representative of a differential pressure measurement.True
26The most common material used in Restance Temperature Detectors is plutonium.False
27Cold Junction Compensation refers to the process of using an ice bath to compensate for the unintended junction of a thermocouple circuit.False
28The filter circuit indicated below represents a ______ filterHigh Pass
29You have calculated that a transducer has an uncertainty of 0.2%. This means that 95% of the readings you take will be within 0.2% of the ACTUAL value being transduced.False
30The most common type of pressure sensing element used in dial type gauges today is ______Bourdon Tube
31Convert the following binary number to a decimal value. 10001011139
32Given the monometer shown, filled with an oil of 0.85 specific gravity, the pressure indicated is _____ inches of water.4.25
33Given the monometer shown, filled with an oil of 0.5 specific gravity, the pressure indicated is _____ inches of water.2.5
34Given the pressure transducer installed in a calibration setup as shown below, with the following specs: Transducer Output +/-5V | Transducer Range 0-25PSI | Accuracy +/- .25% | Calibrator Output 25 PSI |Vin 4.992 Volts What are the units of the nominal calibration in a form that is easiest to use with your data acquisition system?psi/V
35Given the transducer system under calibration shown below, and the following specifications: Transducer Output +/-5V | Transducer Range 0-25PSI | Accuracy +/- .25% | Calibrator Output 25 PSI |Vin 4.992 Volts What is the numeric value of the nominal calibration of the pressure transducer, in the form most easily used with your daq board, excluding the units?2.5
36Given a data acquisition board with 24 bits of resolution and an input range of +/-2.5 volts, what is the resolution of the system in microvolts per bit?0.298
37An incremental encoder, once "homed" will generate the absolute position of the shaft as long as power is not turned off.False
38Given a 2048 Count per revolution quadrature encoder, being driven by a motor, you monitor the output on an oscilloscope as shown below. You use the scopes cursor functions to determine that the time from the rising edge of one pulse on Channel A to the next rising edge pulse on Channel A is - 235 us. What is the speed of the motor in RPM?124.7
39Given the following code snippet, what would the value of 'Result' be at the end of the program execution?9
40Given the voltage divider below, with R1= 1000 ohms, R2 = 200 ohms and the battery = 9.32 volts, the voltage at Vout would be equal to what value?1.553
41Given the following code, what will the value of 'output' be at the end of the programs execution?0
42Given the transient response curve of a temperature transducer, determine the time constant for the device in seconds.0.93
43An Absolute encoder has either 2 or 3 tracks that constantly maintain a record of its motion as long as power is maintainedFalse
44Given the code snippet below, what would the value of 'result' be at the end of program execution?30
45Given a flow tranducer with a 30 GPM range, and error values in the data sheet of the following: Hysteresis - .15% | Non-Linearity - .25% | Repeatability - .15% Determine the uncertainty of the transducers output in GPM0.0984
46You collected the following data from a strain indicator using a 2.5V excitation voltage. Using this data, determine the calibration factor for the gage in g/v/v51.28
47If you have a transducer with a rating of 1000PSIG full scale, operating on its specified power of 5V DC, which of the calibration curves on the graph below would you expect to most likely represent data collected from this transducer?C
48The waveform data type incudes three components. Identify the 3 components of this data type.Y, T0, dt
49You're buddy has invented a new transducer which reads the output in Fizzels (Z) based on the input of two factors, Hecters (X) and Truzels (Y) You have determined that the inputs have the following errors in Hecters and Truzels (Not Percent): and that the output of the system in Fizzels has the following relationship to the inputs: Z = 2X + 0.3Y^2 At the current data input conditions of X=3 Hecters and Y=2 Truzels, what is the uncertainty in the output in Fizzels?0.3347
50Which of the following code segments WOULD NOT add 2.2 to every element of the array? [Keegan's Question 56]Look at old final for answer
51If you have a transducer with a rating of 100PSIA full scale, operating on its specified power of 10V DC, which of the calibration curves on the graph below would you expect to most likely represent data collected from this transducer?B
52Given the pressure trace of a tank that has been sitting at pressure for some period of time, the dynamic transducer decay time is approximately _____ seconds.65
53Given the following diagram of twoType K thermocouples and a meter, determine the temperature that the measurment TC (Tm) is detecting (In degrees C)184
54A standard Thermistor with a 10K curve, reading a resistance of 430K ohms, is detecting a temperature of approximatly ___ degrees C-50
55The flowmeter element that does NOT require any intrusion into the piping system to make its measument is the ______ flow meter.Ultrasonic
56Given the transducer system under calibration shown below, and the following specifications: Output 5V | Range 0-25PSI | Accuracy +/- .25% What is the numeric value of the nominal calibration, in the form most easily used with your daq board, excluding the units?5.0000
57Given a flow tranducer with a 30 GPM range, and error values in the data sheet of the following: Hysteresis - .1% | Non-Linearity - .25% | Repeatability - .15% Determine the uncertainty of the transducers output in GPM0.0924
58You have calculated that a transducer has an uncertainty of 2.2%. This means that the output of the tranducer can vary as much as 2.2% for ANY reading in it's operating range, and still be considered to be operating properly.False
59You're buddy has invented a new transducer which reads the output in Fizzels (Z) based on the input of two factors, Hecters (X) and Truzels (Y) You have determined that the inputs have the following errors in Hecters and Truzels (Not Percent): and that the output of the system in Fizzels has the following relationship to the inputs: Z = 2X + 0.3Y^2 At the current data input conditions of X=2 Hecters and Y=3 Truzels, what is the uncertainty in the output in Fizzels?0.4494
60Given a data acquisition board with 14 bits of resolution and an input range of +/-2.5 volts, what is the resolution of the system in microvolts per bit?305.1940
61In a full bridge with 2 gauges being stressed in the same axis, the total strain indicated by a strain indicator would be equal to ____ % the actual strain in the part.200.0000
62Given a 1000 Count per revolution quadrature encoder, being driven by a motor, you monitor the output on an oscilloscope as shown below. You use the scopes cursor functions to determine that the time from the rising edge of one pulse on Channel A to the next rising edge pulse on Channel A is - 235 us. What is the speed of the motor in RPM?255.32
63Convert the following binary number to a decimal value. 01101010106
64Given the following code snippet, what would the value of 'Result' be at the end of the program execution?7
65Given the following code snippet, what would the value of 'Result' be at the end of the program execution?8
66The following code block would collect 500 samples of data from each channel of the mydaq and store them in a file.False
67The output of a menu ring is a text field that matches the text seen on the screenFalse
68With an input value of 1234.654321, what value will be seen in the 8 bit unsigned integer type.255
69With the input number of 1234.654321 and a format string of (%3.f) what would the output be?1235
70There is effectively no difference between an unsigned integer and a signed integer except one shows a sign and the other doesn'tFalse
71You can control the execution of a case statement from within the case statementTrue
72The default behavior of a pass through in a for loop isReturn the a value for each iteration
73An integer constant wired to the frame of a while loop will pass one value in that is evaluatedAt the beginning of the first iteration
74In a stacked input shift register, the value contained in the top most register at the end of the program will beThe value from the next to last iteration of the loop
75When a pass-through is wired out of a for loop, it defaults toAn array value pass through
76An acquisition configured for multiple channels and multiple samples will create data in what form?A 2D array of floating point values
77An acquisition configured for one channel and multiple samples will create data in what form?A single row array of floating point values
78The "write to spreadsheet" vi will write text and numbers to a file equally well.False
79Once you open a file, the computer knows about it as,As a numeric called a "refnum"
80In order to write to the end of a text tile the following steps must be done in what order?1. Open the file
2. Read the length of the file
3. Set the position in the file
4. Write the data
81An array can contain a combination of numbers, text, or other values all togetherFalse
82The function that will return the number of elements IN an array is the ____ viArray size
83The function that will return a number of elements FROM an array is the ____ viArray subset
84A single channel X-Y graph uses a build array to combine the signals neededFalse
85The waveform chart needs both a time and a Y array to plotFalse
86The X-Y graph usesAn array for X and an Array for Y of the same number of elements "bundled" together in a cluster
87Connecting a wire to the frame of a formula node will automatically create an input terminalFalse
88Every line in a formula node must end with the __ character;
89A probe can help you determine what is happening inside a program. A probe on the for loop iteration counters ends with what value showing?999
90SubVi's will pass back data as soon as its available, even if there are still tasks running inside the subViFalse
91Data is passed to a subVITying front panel controls and indicators to the "connector" in the subVI
92The main program will wait for the sub/vi to finish before it can continue unless its property for "reentrant execution" has been setTrue
93The properties tab you use to set the limits of the input values for the know is theData entry
94The slide fill color can be adjusted by what methods?Using the paintbrush to color it, Using the property 1 appearance tab to set it
95The easiest way to program the desired operation of the switch is to do so with a case structureTrue
96Property nodes willAllow you to programatically change most things about a front panel
97There is no option to change the chart history length programatically because the memory is static and defined at run timeTrue
98The default text font size for labels is15 pt
99To label a wire you need toRight click and select "Visible items | Label"
100When an object with labeled wires moves, the label always stays in the middle of the wireFalse
101A tab object is by default a controlTrue
102A tab (mark all that are correct)Is a front panel control that can contain as many indicators or controls as you can fit on it, Can be either an indicator or control, Are useful at helping organize clutter on a user interface
103The filter circuit indicated below represents a ____ filterLow Pass