Question 1
Question
What is measured during a Rockwell Hardness Test?
Answer
-
Material
-
Depth
-
Density
-
Impact
Question 2
Question
Why do we ground both sides of the Magmeter?
Question 3
Question
What is the difference between Coal and Methane (CH4) combustion?
Answer
-
One is a gas and one is a solid.
-
Methane does not require oxygen to burn
-
Methane combustions results in complete conversion to CO2.
-
Coal does not produce water.
Question 4
Question
What type of capacitance probe should be used in a conductive solution?
Answer
-
Insulated
-
Rigid
-
Flexible
-
Float
Question 5
Question
What is the maximum transmitter loop resistance (ohms)?
Answer
-
Infinite
-
1 KOhm
-
100 Ohm
-
600 Ohm
Question 6
Question
What is kinematic viscosity equal to?
Answer
-
Kinematic Viscosity = Dynamic Viscosity / Density
-
Kinematic Viscosity = csT X Density
-
Kinematic Viscosity = Density / Mass
-
Kinematic Viscosity = Viscosity X Velocity
Question 7
Question
What is the difference between 2-Wire and 4-Wire transmitters?
Answer
-
4 Wire contains additional information.
-
4 Wire has both a digital an analog signal.
-
4 Wire uses 2 Wires for power and 2 for transmitting.
2 Wire uses both wires for power and transmitting.
-
2 Wire is the only method capable of HART
Question 8
Question
What is K Factor?
Answer
-
The amount of pulses per minute. F = Hz * P
-
The amount of water able to mass through the meter in one minute. (GPM)
-
The vendor set standard for flow through the meter.
-
The amount of pulses per minute. Q = F * 60/K
Question 9
Question
How is turbidity measured?
Answer
-
Reflection from a UV Source.
-
Scattering of light in a solution.
-
Absorbtion of light.
-
Ultrasonic waves absorbed.
Question 10
Question
What is Opacity?
Answer
-
Suspended solids.
-
A measure of translucence.
-
Absorption of light in a solution.
-
The ability of a fluid to conduct light.
Question 11
Question
What is a communication standard?
Answer
-
HART
-
Modbus
-
Foundation Fieldbus
-
All of the above
Question 12
Question
89. What’s the most accurate way of stating error?
Answer
-
% of reading.
-
Absolute units.
-
% of span.
-
% of Upper Range Value.
Question 13
Question
What happens when an atom loses/gains an electron?
Answer
-
Loses an electron becomes positive+, oxidation occurs
Gains an electron becomes negative-, reduction occurs
-
Loses an electron becomes negative-, oxidation occurs
Gains an electron becomes positive+, reduction occurs
-
Loses an electron becomes positive+, reduction occurs
Gains an electron becomes negative-, oxidation occurs
-
Loses an electron becomes negative-, reduction occurs
Gains an electron becomes positive+, oxidation occurs
Question 14
Question
What is the resolution calculation for DAC/ADC?
Question 15
Question
What does a catalyst do?
Answer
-
Speeds up a chemical reaction.
-
Stabilizes a chemical reaction.
-
Stops a chemical reaction.
-
Used to measure the energy released from a chemical reaction.
Question 16
Question
What are the states of PH?
Answer
-
Ph > 7 Basic
Ph < 7 Acidic
Ph = 7 Neutral
-
Ph > 7 Acidic
Ph < 7 Basic
Ph = 7 Neutral
-
Ph > 7 Basic
Ph < 7 Neutral
Ph = 7 Base
-
Ph > 7 Solvent
Ph < 7 Acidic
Ph = 7 Neutral
Question 17
Question
What is the easiest way to calibrate a nuclear meter?
Answer
-
Open Shutter for full level.
Close shutter for zero.
-
Open shutter for zero.
Close shutter for full level.
-
Close shutter for full level.
Guide source down the vessel wall between the detector and wall.
-
Nuclear meters do not require calibration.
Question 18
Question
How does ultrasonic level detection work?
Answer
-
A signal is transmitted down to the fluid and the amount of time it takes to return is inversely proportional to level.
-
The signal is transmitter across the tank and the reflection is inversely proportional to the level.
-
Multiple sensors are used to detect where the signal is strongest.
-
The amount of soundwave absorbed is proportional to the level in the tank.
Question 19
Question
What is doppler flow measurement?
Answer
-
Doppler is used to measure weather not flow.
-
The sensor emits sound @ a fequency. This is reflected back by matter in the stream.
-
Doppler works using radar to measure the flow profile from that we can infer the flow rate.
-
The sensor emits high frequency radiowaves based on the returned wavelengths we can determine flow.
Question 20
Question
What is the flow proportionality for Vortex meters?
Answer
-
The vorticies form is inversely proportional to the flow rate.
-
The vortex velocity is directly proportional to flow.
-
The vibrations on the sensor are directly proportional to the inlet flow rate.
-
The vorticies form is directly proportional to the flow rate.
Question 21
Question
What is included in regular Coriolis meter maintenance?
Answer
-
Meter should be returned to factory to be proven and refurbished.
-
Sensor replacement and a 3-point calibration.
-
Cleaning and a zero calibration.
-
All soft parts should be replaced and the meter should be spanned.
Question 22
Question
How does a DP Transmitter measure level?
Answer
-
Infers weight of water column
-
Directly measures weight of water column
-
Infers height of water column
-
Directly measures height of water column
Question 23
Question
What is solution concentration?
Question 24
Question
What is traceability?
Answer
-
The mark of an analyzer used to measure repeatability.
-
The ability to map measurement points.
-
Tracing a signal over a step change.
-
An unbroken chain of measurements.
Question 25
Question
What are the two most commonly monitored gases on a flue stack?
Answer
-
CO, O2
-
CO2, NOx
-
O2, NO
-
CO2, O2
Question 26
Question
Water and Natural Gas burning is an example of....
Answer
-
Bad practice.
-
A chemical reaction.
-
Hydro-combustion
-
An Endothermic reaction
Question 27
Question
Different gains in a process means
Question 28
Question
What is molar mass?
Question 29
Question
Where should a particulate filter be placed in a sample system?
Question 30
Question
The bluff body is directly proportional to
Answer
-
Flow
-
Temperature
-
Pressure
-
Velocity
Question 31
Question
Why is pH hard to measure?
Question 32
Question
Selective control is.....
Answer
-
is a process in which some condition is checked and a decision is made about whether a certain segment of the program code will execute.
-
is a process in which the FCE is only actuated when a number of criteria is met.
-
control that is based on a number of input variables.
-
The controller is selective of which responses are passed on to the loop.
Question 33
Question
A valve positioner can help provide important diagnostics like
Question 34
Question
What is the standard calibration procedure?
Answer
-
Zero and Span.
-
Zero, Calibration Points, and Span.
-
Zero, Calibration Points, and Span. Repeat if necessary.
-
It depends on the instrument.
Question 35
Question
What is repeatability?
Answer
-
is the variation in measurements taken by a single person or instrument on the same item, under the same conditions, and in a short period of time.
-
measuring the same value over and over to see if the error is growing.
-
the ability of an instrument to repeat it's signal.
-
is the variation in measurements taken by a single person or instrument on the same item, under the same conditions, and in a long period of time.
Question 36
Question
What is Accuracy?
Answer
-
The difference between a true value and a measured value.
-
The measure of the difference between an input and output values.
-
The ability of the measurement to meet the input value.
-
The degree to which the result of a measurement, calculation, or specification conforms to the correct value or a standard.
Question 37
Question
What are the benefits of Insitu Vs Extractive sampling?
Answer
-
Insitu is cheaper and requires less sample conditioning.
-
There are no advantages each method is required in certain situations.
-
Insitu provides better measurement results and can help trend the process more quickly.
-
Extractive is actually the better method because it is cheaper and more accurate.
Question 38
Question
What is the formula for First order + Dead time?
Answer
-
KeF + (1-dts/T)
-
D*T(ke*C*pV)
-
dts / ke(1+TSi)
-
(ke^-dts)/(1+ti*S)
Question 39
Question
Linearity of a Smart Tx is an example of....
Question 40
Question
Which is a Mechanical Property?
Answer
-
Temperature
-
Smell
-
Ductile
-
State
Question 41
Question
Which processes require an extended diaphragm?
Answer
-
Heavy Oil
-
Corrosives and slurries
-
Gas
-
Chemical
Question 42
Question
Derivative response to changes in.....
Question 43
Question
Which locations are acceptable for orifice taps on steam service?
Answer
-
Offset
-
Bottom
-
Horizontal
-
On top
Question 44
Question
Any location where petrochemicals or natural gas may be present is?
Answer
-
A hazardous location
-
Class 1 Div 1
-
Class 1 Zone 2
-
A non-hazardous location
Question 45
Question
What is the best method for measuring pure water?
Answer
-
pH
-
ORP
-
Conductivity
-
Turbidity
Question 46
Question
Which medium is used for Hydrostatic Pressure Tests>
Answer
-
Process Medium
-
Oil/Natural Gas
-
Water
-
Air
Question 47
Question
Who is the Magnetic Law named after?
Answer
-
Tesla's Law
-
Einstein's Law
-
Newton's Law
-
Faraday's Law
Question 48
Question
What is measured when you're using radar level?
Answer
-
The electromagnetic signal
-
Frequency
-
The amount of wave length absorbed
-
How much signal is returned
Question 49
Question
O2 in a chemical is.....
Answer
-
A catalyst
-
An oxidant
-
The dominant reagent
-
An reducing agent
Question 50
Question
In a selective process reset windup happens....
Answer
-
Only to the slaves
-
To all controllers
-
Only to the master
-
To all components
Question 51
Question
What are the benefits of cascade control?
Answer
-
It helps optimize the inner loop and reduce manipulated variable variance.
-
It increases the speed of response.
-
It eliminates over and undershoot.
-
Cascade control is only for extremely complicated processes and the benefit is they allow for tight control in these difficult situations.
Question 52
Question
What is not a conductor?
Answer
-
Plasma
-
Copper
-
Plastic
-
Water
Question 53
Question
Linear expansion is calculated with....
Answer
-
ΔL = T α (L2 - L1)
-
L = ΔL α (t2 - t1)
-
ΔL = L α (t2 - t1)
-
ΔL = L (t2 - t1)
Question 54
Question
In a closed loop Gain =
Answer
-
kc*kp/(1+kc*kp)
-
(kc*kp)^-1
-
(kc*kp)^2
-
(kc*kp)^1/2
Question 55
Question
An Oxygen Analyzer detects a 20% increase in the fuel gas, what happens to the Air to Fuel ratio?
Answer
-
The Ratio increases and CO2 decreases
-
The Ratio decreases and CO increases
-
The Ratio increases and CO decreases
-
The Ratio decreases and CO2 increases
Question 56
Question
Manual bias is required for which controllers?
Answer
-
Proportional
-
Proportional and Derivative
-
Proportional and Integral
-
Proportional, Integral, and Derivative
Question 57
Question
A self regulating process will....
Question 58
Question
If an I/P responds to an increase in current with a reducing pressure this is an example of ......... control action
Answer
-
Minimizing
-
Reverse
-
Direct
-
Actuating
Question 59
Question
What is the sum of all errors?
Question 60
Question
What group is VIIA?
Answer
-
Transitional Metals
-
Alkali Metals
-
Noble Gases
-
Halogens
Question 61
Question
What is the normal state for group IIA?
Answer
-
Solid
-
Liquid
-
Gas
-
Depends on the element
Question 62
Question
What organic compound does C=C-C represent?
Answer
-
Propane
-
Propene
-
Benzene
-
Butene
Question 63
Question
What is the chemical formula for Calcium Chloride?
Question 64
Question
Which represents Benzene using Carbon Chains..
Answer
-
C-C=C-C=C-C=
-
C=C-C
-
C-C-C
-
C=C-C=C-C=C-CH3
Question 65
Question
What type of controller does this graph represent?
Question 66
Question
For liquid flow processes what should the controller settings be?
Answer
-
TA= 0.5, 10
-
TA= 1, 5
-
TA= 1, 10
-
TA= 10, 100
Question 67
Question
With a 5% increase in CO and a 10% increase in PV, what is the gain?
Question 68
Question
What reaction will happen if Iron is left in H2O?
Answer
-
Reduction
-
Oxidation
-
Ionization
-
Plating
Question 69
Question
What is measured when analyzing pH or electrical conductivity?
Answer
-
Number of free ions
-
Electrical current
-
Acidity
-
The activity of ions
Question 70
Question
What is annealing?
Answer
-
The removal of free ions from the metals surface
-
Relieves internal stress in metals
-
An inert sealing process
-
A blending of graded stainless steel
Question 71
Question
_C4H10 + _O2 >>>> _CO2 + _H2O
Please balance the equation.
Question 72
Question
What are the advantages of a grab sample?
Question 73
Question
What are the disadvantages of grab samples?
Answer
-
Expensive
-
Cannot be accurately verified
-
Is not representative of the process when taken.
-
Innacurate and a Bypass is required.
Question 74
Question
What are the two types of turbines?
Question 75
Question
How do you determine derivative?
Answer
-
It is determined by the gain and integral of the controller.
-
It is the rate of change.
-
It is a measure of how a function changes as the input changes.
-
It is the value of overshoot to eliminate
Question 76
Question
What is a polar covalent bond?
Answer
-
Unequal donation of electrons.
-
Equal sharing of electrons.
-
Unequal sharing of electrons.
-
Equal donation of electrons.
Question 77
Question
What are the products of coal in complete combustion?
Answer
-
C + O2 > CO2
-
C + O2 > CO + O2
-
C + H2O > CO + H2O
-
C + O2 > CO + CO2 + O2
Question 78
Question
What type of process has gain changing at 3 points?
Answer
-
Linear, Multicapacity, Integrating
-
Linear, Single Capacity, Self Regulating
-
Non-Linear, Multicapacity, Integrating
-
Non-Linear, Single capacity, Integrating
Question 79
Question 80
Answer
-
how the conotrller modulates gain
-
How the error is calculated in reference to the change in signal
-
The sum of errors over the step change
-
Output of the controller when no errors exist
Question 81
Question
What type of communication is used in a digital loop with a controller with continuous talking?
Answer
-
Peer to peer
-
IP
-
Modbus
-
HART
Question 82
Question
Why is cabling shielding used?
Answer
-
To prevent electromagnetic interference
-
To prevent the cable from cracking during bending and coiling
-
To contain the heat and electricity traveling in the wire
-
Shielding is used to tell what gauge and specifications apply to the cable
Question 83
Question
Why does a transmitter require a minimum voltage?
Answer
-
Without power the display and signal emitter will not function.
-
The power is required to actuate the sensor
-
To accurately generate an analog signal
-
No transmitter can function without power
Question 84
Answer
-
Control Valve
-
Calculated Velocity
-
Controlled Variable
-
Flow Coefficient
Question 85
Question
what is the principle of positive displacement meter?
Answer
-
Uses the displacement of a flapper element to correspond to the volumetric flow
-
Divides the flow media into fixed volumes and as it passes through the flow body the time taken corresponds to the exact flow.
-
Based on the velocity at the entry and exit sensor volumetric flow is calculated.
-
The size of the flow body will directly correlate to the volumetric flow.
Question 86
Question
What function does an I/P complete?
Answer
-
Converts voltage to pressure.
-
Converts pressure to current.
-
Converts current to volts.
-
Converts current to pressure.
Question 87
Question
Define a multi-capacity process.
Answer
-
A combination of dead time and first order
-
When multiple process interact and effect the overall control method
-
A process with multiple controlled variables.
-
A process with multiple controllers in a polling system to determine the final output.
Question 88
Question
Which is a measurement of a vibration cycle?
Answer
-
Peak to peak
-
Period of oscillation.
-
Wave size
-
Wave length
Question 89
Question
How does a Load Cell work?
Answer
-
Less resistance = Less Load
-
Less resistance = More Load
-
More resistance = Less Load
-
More resistance = More Load
Question 90
Question
Why is coal crushed for combustion?
Answer
-
Increased surface area will generate more heat.
-
If the coal is not crushed it will not combust. Must be a dust.
-
Crushed coal will have more efficient combustion and produce less CO.
-
It is easier to transport.
Question 91
Question
What functions do a sampling probe offer a Sample System?
Question 92
Question
What is cascade control?
Answer
-
Uses a descending SP to slowly modulate the final control element
-
Uses a feed forward strategy to determine a new SP based on the last sent SP
-
Multiple controllers vote towards a master controller which will determine the final SP.
-
Uses output of the primrary controller to manipulate the SP of a secondary controller
Question 93
Question
In a H2O treatment facility, what is the best analyzer?
Question 94
Question
What does the distillation analyzer produce?
Answer
-
Boiling Characteristics
-
Purity
-
Dew Point
-
All other answers
Question 95
Question
What is a worldwide standardized analyzer?
Answer
-
Micro Gas Chromatograph
-
Dead Weight Tester
-
Chilled Mirror
-
Oil in Water Analyzer
Question 96
Question
What does Phase Lag do in first order processes?
Answer
-
Phase Lag increases as Gain decreases
-
Phase Lag decreases as Gain increases
-
Phase Lag increases as SP decreases
-
Phase Lag increases as Integral decreases
Question 97
Question
If the voltage over a 250 Ohm resistor is 10VDC what is the current?
Answer
-
250 A
-
250 mA
-
250 kA
-
2500 mA
Question 98
Question
Which O2 Analyzer uses a bridge circuit?
Answer
-
Thermo-Magnetic
-
Electro-Chemical
-
Zirconium Oxide
-
Infared
Question 99
Question
What must remain constant with capacitance level measurement?
Answer
-
Conductivity
-
Density
-
Volume
-
Moisutre Content
Question 100
Question
The SI unit for radiation dose equivalent is which of the following?
Answer
-
Gray
-
Curie
-
Sievert
-
Sutherby
Question 101
Question
SCR is an acronym for.....
Answer
-
Self Contained Regulator - A regulator that is not pilot or instrument operated
-
Silicon Controlled Rectifier - a device which conducts in only 1 direction.
-
Scattered Control Region - When the controller outputs cannot be plotted using a line or wave
-
Strip Chart Recorder - A recording device used to record a measured signal over time.
Question 102
Question
What’s the best location of an analyzer used for process control?
Question 103
Question
What happens to electrons when two nitrogen’s bond?
Answer
-
Gives Electrons, Ionic Bonding
-
Shares Electrons, Covalent Bonding.
-
Shares Electrons, Metallic Bonding.
-
Gives Electrons, Hydrogen Bonding
Question 104
Question
10. Given Vout = 24V Gain = 1000, R1 = 5 KOhm, Ro = 5 MOhm calculate Vin of an inverting op-amp, using: Vin=Vo/Av or Vo= (-Rf/Ri)*Vin?
Answer
-
0.024 Volts
-
24 Volts
-
0.24 Volts
-
24,000 Volts
Question 105
Question
In this circuit, what is the expression for the ratio of output voltage to input voltage (Vout/V1)?
Answer
-
Ro/R1
-
-Ro/R1
-
R1/Ro
-
-R1/Ro
Question 106
Question
In this circuit, you want a gain of ten. Actually, you are going to have to settle for a gain of -10 because you can't get rid of the minus sign. Still, if R1 is 5 kW, what is the value you need to use for R0? Give your answer in ohms.
Answer
-
500 Ohms
-
-50,000 Ohms
-
50,000 Ohms
-
-500 Ohms
Question 107
Question
In this circuit, you have it set up for a gain of -10. The input voltage is .24v. What is the output voltage?
Answer
-
-2.4 Volts
-
2.4 Volts
-
24 Volts
-
-.024 Volts
Question 108
Question
In this circuit, you have it set up for a gain of -10. The input voltage is -.35v. What is the output voltage?
Answer
-
0.035 Volts
-
-3.5 Volts
-
3.5 Volts
-
-0.035 Volts
Question 109
Question
Assuming that you have an inverting amplifier with R1 = 10,000W, determine a value for Ro that will produce an amplifier with a gain of 3.3.
Answer
-
-33000W
-
3300W
-
330000W
-
33000W
Question 110
Question
Assuming that you have an inverting amplifier with Ro = 4,700W, determine a value for R1 that will produce an amplifer with a gain of -5.
Answer
-
23,500W
-
940W
-
-940W
-
-23,500W
Question 111
Question
Polarographic cell is good for?
Question 112
Question
How to measure moisture content in a sheet of paper where particle size does not matter?
Answer
-
Voltage
-
Conductivity
-
Moisture Analyzer
-
Infared Absorbtion
Question 113
Question
4-20mA input and 10-bit output, calculate the number of mA per bit?
Answer
-
15.6uA
-
15.6 mA
-
0.156 mA
-
15.6 A
Question 114
Question
The MSB of an 8-bit system is?
Answer
-
1024/8 = 128
-
2^8 = 256/2 = 128
-
2^8 = 256
-
1024 * 8 = 8192
Question 115
Question
Method of density measurement using a sample gas column and an air column?
Answer
-
Weight Scale
-
Gravitometer
-
Densitometer
-
Blower Motor
Question 116
Question
16. Faraday’s law states that a conductor moving through a magnetic field generates a?
Answer
-
Field
-
Voltage
-
Current
-
Resistance
Question 117
Question
17. Which of the following has the fastest response: Zener diode, Avalanche diode, Metal Oxide?
Answer
-
Metal Oxide
-
Zener Diode
-
Avalanche Diode
-
None of the above
Question 118
Question
Intrinisic Safety is what type of protection?
Answer
-
Energy Limiting
-
Containment
-
Purging
-
General Purpose
Question 119
Question
What is the purpose of a Transmitter?
Answer
-
To measure a process variable.
-
Provide a read out indication of a process variable.
-
Converts a measured process variable into a signal.
-
Depends on the transmitter configuration.
Question 120
Question
How many current loops are in a PID loop?
Question 121
Question
What is the formula for butane?
Question 122
Answer
-
Ammonia Chloride
-
Ammonium Chloride
-
Table Salt
-
Sodium Chloride
Question 123
Question
Please balance _CH2 + _O2 --> _CO2 + 2H2O
Answer
-
2, 6, 2,
-
2, 4, 2
-
4, 12, 4
-
1, 1, 1
Question 124
Question
What is a property of Alkanes?
Question 125
Question
Why is it hard to control PH?
Answer
-
The titration curve is non linear.
-
Very high resistance in probe.
-
Very small voltage change.
-
All of the above.
Question 126
Question
Given this chemical reaction in a boiler what are the products and reactants?
CH4 + 2O2 → CO2 + 2H2O
Answer
-
Products: CO2, H2O
Reactants: CH4, O2
-
Products: CH4, O2
Reactants: CO2, H2O
-
Products: CO2, O2
Reactants: CH4, H2O
-
Products: CH4, H2O
Reactants: CO2, O2
Question 127
Question
A smart valve senses what?
Answer
-
Position
-
Pressure
-
Temperature
-
All answers
Question 128
Question
What is the purpose of the Teflon coating in a Magnetic Flow Meter?
Answer
-
Prevents corrosion of the meter and electrodes.
-
Prevents the generated signal from shorting to pipe.
-
The coating must be soft to create the right flow profile.
-
Without the coating the flanges will not be able to hold the meter in the correct position.
Question 129
Question
What is the material in an O2 analyzer membrane?
Answer
-
Teflon
-
PFA
-
Tefzel
-
Hard Rubber
Question 130
Question
How do you measure flow in a trench? (Most Common Method)
Answer
-
Weir
-
Paddlewheel
-
Flow Nozzle
-
Turbine
Question 131
Question
When transistors are used in digital circuits they usually operate in the:
Question 132
Question
Three different Q points are shown on a dc load line. The upper Q point represents the:
Question 133
Question
A current ratio of IC/IE is usually less than one and is called:
Question 134
Question
In a C-E configuration, an emitter resistor is used for:
Answer
-
Stabilization
-
AC Signal Bypass
-
Collector Bias
-
Higher Gain
Question 135
Question
With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:
Answer
-
High Resistance
-
Open
-
Low Resistance
-
Infinite
Question 136
Question
Voltage-divider bias provides:
Question 137
Question
To operate properly, a transistor’s base-emitter junction must be forward biased with reverse bias applied to which junction?
Answer
-
Collector-Emitter
-
Base-Emitter
-
Base-Collector
-
Collector-Base
Question 138
Question
The C-B configuration is used to provide which type of gain?
Answer
-
Current
-
Voltage
-
Resistance
-
Power
Question 139
Question
The ends of a load line drawn on a family of curves determine:
Answer
-
The Operating Point
-
Saturation and Cutoff
-
The Amplification Factor
-
The Power Curve
Question 140
Question
Which is beta’s current ratio?
Question 141
Question
The Q point on a load line may be used to determine:
Question 142
Question
A transistor may be used as a switching device or as a:
Answer
-
Fixed Resistor
-
Rectifier
-
Tuning Device
-
Variable Resistor
Question 143
Question
When a silicon diode is forward biased, what is VBE for a C-E configuration?
Answer
-
Emitter Voltage
-
Voltage-Divider Bias
-
0.7V
-
0.4V
Question 144
Question
With low-power transistor packages, the base terminal is usually the:
Answer
-
Stud Mount
-
Middle
-
Right End
-
Tab End
Question 145
Question
A collector characteristic curve is a graph showing:
Answer
-
Collector current (IC) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant.
-
Emitter current (IE) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant.
-
Collector current (IC) versus collector-emitter voltage (VC) with (VBB) base bias voltage held constant.
-
Collector current (IC) versus collector-emitter voltage (VCC) with (VBB) base bias voltage held constant.
Question 146
Question
What is the current gain for a common-base configuration where IE = 4.2 mA and IC = 4.0 mA?
Answer
-
1.05 mA
-
0.20 mA
-
16.80 mA
-
0.95 mA
Question 147
Question
If a 2 mV signal produces a 2 V output, what is the voltage gain?
Question 148
Question
With a PNP circuit, the most positive voltage is probably:
Question 149
Question
Most of the electrons in the base of an NPN transistor flow:
Answer
-
Into the base supply
-
Into the emitter
-
Into the collector
-
Out of the base lead
Question 150
Question
In a transistor, collector current is controlled by
Answer
-
All of the below.
-
Base Current.
-
Collector Voltage.
-
Collector Resistance.
Question 151
Question
What is the most reliable form of density measurement
Answer
-
Bubbler
-
Differential Pressure
-
Densitometer
-
Weighted Flow
Question 152
Question
Using Psychometric chart find dew point given dry air 20 Deg C, wet air 13 Deg C?
Answer
-
10 Deg C
-
8 Deg C
-
7.6 Deg C
-
7 Deg C
Question 153
Question
Integrating op-amp, what happens when Rf opens? Vo= (Rf/Ri) + 1*Vin
Answer
-
Negative Rail
-
Positive Rail
-
Clipping
-
DC Offset
Question 154
Question
Whose law refers to flow head or head pressure?
Answer
-
Einstein
-
Faraday
-
Bernoulli
-
Newton
Question 155
Question
Name a disadvantage of positive displacement meters?
Question 156
Question
What is an example of a PD meter?
Answer
-
Nutating Disc
-
Rotating Vane
-
Reciprocating Piston
-
All of the above
Question 157
Question
What’s the advantage of a turbine flow meter?
Answer
-
High Accuracy, Repeatibility
-
No Moving Parts
-
Never Requires Calibration
-
Provides cheap mass flow readout
Question 158
Question
How does the Magnetic Shuttle ball Vortex Shedding meter measure?
Answer
-
Capacitance
-
Impedance
-
Resistance
-
Inductance
Question 159
Question
What type of flow has a Reynolds’s number of 10,000?
Answer
-
Turbulent
-
Laminar
-
Transistional
-
None
Question 160
Question
What form of excitation in a Magnetic Flowmeter performs zeroing?
Question 161
Question
What is a requirement for an ultrasonic Doppler flow meter?
Question 162
Question
Using the HART communicator it must be in what with resistor?
Answer
-
Paralell
-
Series
-
It can be in any circuit
-
Line
Question 163
Question
Most accurate form of temperature measurement?
Answer
-
Thermocouple
-
Thermometer Bulb
-
RTD 3 Wire or 4 Wire
-
Thermistor
Question 164
Question
Advantage of a Pyrometer?
Answer
-
Allows for multiple temperature measurements at once
-
Never requires calibration
-
No moving parts and no physical contact
-
Can be used at a distance
Question 165
Question
What is a Pyrometer`s principle of operation?
Answer
-
Excitation of the laser frequency corresponds to temperature.
-
Hot objects radiation is compared to a tungsten lamp. Thermal radiation given off by an object is a function of its absolute temperature.
-
The change in temperature of the metal generates a voltage.
-
The change in tensile strength corresponds to the change in temperature.
Question 166
Question
Disadvantage of a thermistor?
Question 167
Question
Why does a Thermocouple have reference temperature compensation?
Answer
-
To generate voltage a neutral source is required.
-
To compensate for ambient temperature changes.
-
To compensate for the junction created at the transmitter terminals.
-
B & C
Question 168
Question
A Thermocouple measures
Question 169
Question
What are the benefits of using a Thermocouple?
Question 170
Question
What is a method of calibrating a Thermocouple?
Answer
-
Place the reference junction in an ice bath and measure ambient temperatures.
-
Measure ambient temperatures with reference tables.
-
They must be laboratory calibrated.
-
Thermocouples cannot be calibrated.
Question 171
Question
What is derivative?
Answer
-
Accounts for present values of errors.
-
Accounts for past errors and uses it to respond to new changes.
-
Rate of PV change over time, ΔPV/Δt. Rate of change of error/change in time, Δe/Δt.
-
A control method for rapidly changing processes.
Question 172
Question
Given PB=50%, Reverse acting, step Input of 5% increase, what is the open loop response?
Answer
-
10% Decrease.
-
10% Increase
-
5% Decreae
-
5% Increase
Question 173
Question
Given 0-6mV input and 4-20mA output, what is the gain?
Question 174
Question
With a 250Ω resistor, with 4-20mA across, what is the voltage?
Answer
-
1-5 Volts
-
10-30 Volts
-
2-10 Volts
-
0-24 Volts
Question 175
Question
Why is an H2S or Ammonia detector not good in other toxic environments?
Answer
-
They are fine for all environments.
-
They can cause an explosion.
-
Other combustible gases can change the response of the detector.
-
Toxic environments will damage the sensor providing false readings.
Question 176
Question
Given 2% CH3 and the UEL of CH3 is 5.3%. What’s the LEL?
Question 177
Question
What are the most common components to monitor in stack gases?
Question 178
Question
Definition of Opacity?
Answer
-
The density of a solution.
-
Amount of light alternation due to absorption or reflection by a solution.
-
The viscosity of a solution.
-
None of the above.
Question 179
Question
What is the principle of operation of an ultrasonic level detector?
Answer
-
Time it takes for a sound pulse to travel from a sensor to reflecting surfaces & back to the sensor. Measured time for the sound to bounce and return.
-
How much sound is absorbed as it passes through the fluid.
-
The amount of vibration in the sensor based on the frequency of the fluid.
-
None of the above.
Question 180
Question
What are some good processes for ultrasonic level detection?
Answer
-
Corrosive or Reactive Fluids.
-
Hydrocarbon storage cavity, chip bin. Solids.
-
Interface and Multi-phase Solutions
-
All of the above.
Question 181
Question
With no current output in a loop, what is the first thing to check?
Answer
-
Wire
-
Resistor
-
Power Supply
-
Voltage
Question 182
Question
Given an alarm circuit diagram, if the Vsupply increases by 2V, what happens?
Answer
-
Low and high alarm set points increases.
-
High alarm set point increases.
-
Low and high alarm set points decreases.
-
Low set point decreases.
Question 183
Question
70. What is the accuracy of Draegar tubes?
Answer
-
+/- 5%
-
+/- 10%
-
+/- 25%
-
+/- 50%
Question 184
Question
What is sensed by lead acetate tape?
Question 185
Question
What is sour gas?
Question 186
Question
What is the limitation of a Coriolis Mass flow meter?
Question 187
Question
Which is a type of gas density measurement?
Answer
-
Ultrasonic
-
Centrifugal
-
Coriolis
-
Thermal Mass
Question 188
Question
Where to place a hydrogen detector in a compressor building?
Answer
-
Down Low.
-
Up High.
-
Middle Height
-
A & B
Question 189
Question
Which of the following is being reduced in the following:
S + O2 ---> SO2
SO2 + H2O ---> H2SO3
Answer
-
SO2 + H2O ---> H2SO3
-
S + O2 ---> SO2
-
Neither is reduction.
-
Both are reduction.
Question 190
Question
Given H+ concentration = 7.2*10e-11 find PH?
Question 191
Question
Which is more basic?
Question 192
Question
Difference op-amp, given Vin = 1.2V what is Vout? Vo=(Vi2-Vi1)(Rf/Ri)
Question 193
Question
Purpose of a flame detector in a burner?
Answer
-
To give the flame profile.
-
To detect incomplete combustion.
-
A & D
-
To detect if the pilot goes out.
Question 194
Question
Explosimeter prevents fire during operation by?
Answer
-
Flame Arrester.
-
Reducting Foil.
-
Flashback arrestor.
-
None of the above.
Question 195
Question
Definition of Strauhal’s number? Or how does it relate to a Shedding Vortex Meter.
Answer
-
Used to determine the size and number of vortices in a flow profile.
-
Relates vortices to velocity.
-
6.022×10^23 Is used to determine the relationship between vortices and mass flow.
-
None of the above.
Question 196
Question
Where is the control loop shield attached?
Question 197
Question
What are the benefits of a current limiting transmitter?
Answer
-
Protects all loop components.
-
Limits voltage to within operating tolerance.
-
Maintains loop resistance.
-
All of the above
Question 198
Question
Process is at 200Hz, When should we take a sample?
Question 199
Question
Definition of CMRR in op-amps?
Answer
-
Common mode rejection ratio - the ability to reject noise.
-
Common meter rising resistance - the ability to modulate resistance based on the input current
-
Common mode resistance ratio - the ratio of resistors to voltages.
-
None of the above.
Question 200
Question
What type of op-amps acts as if it has two gains?
Answer
-
Difference
-
Integrating
-
Potentiometric
-
Ideal