Red Seal Exam

1. 1What is the green wire used for on an electrical drill?

   1. AGround
   2. BPower
   3. CRegulation
   4. DInversion
2. 2When first turning off a burning torch, one should?

   1. ATurn off acetylene at the cylinder.
   2. BExtinguish the flame.
   3. CTurn off acetylene at the torch.
   4. DConfirm the environment is safe.
3. 3What do you need to put out an electrical fire?

   1. AH2O
   2. BO2
   3. CNH4
   4. DCO2
4. 4To understand a logic diagram, what do you have to know?
   

   1. ASymbols and Functions
   2. BC++ Programming
   3. CLadder Logic
   4. DLife
5. 5What is parallax error caused by in an indicator?

   1. AThe angle between eye and indicator.
   2. BSoftware.
   3. CBackground Radiation.
   4. DUnidentified contaminants.
6. 6A radiation Film Badge indicates?

   1. AThe amount of radiation exposure over a period of time.
   2. BCurrent radiation risk.
   3. CWhat radiation is present in your vicinity.
   4. DNone of the above.
7. 7Chlorine gas with a S.G. of 25, means?

   1. AIt is 25 times heavier than water.
   2. BIt is 25 times heavier than air.
   3. CIt is 25 times the molecular weight of water.
   4. DIt is 25 times the molecular weight of air.
8. 8Which element is the most sensitive elastic pressure element?

   1. ACapacitance
   2. BPiezeo-Electric
   3. CCapsule
   4. DBellows
9. 9If proportional band is increased, the gain will?

   1. ARemain the same.
   2. BIncrease
   3. CDecrease
   4. DNot enough information to answer.
10. 10What is a nutating meter?

    1. AA disc type flowmeter.
    2. BA paddle type flowmeter.
    3. CA modulating flowmeter.
    4. DAll of the above.

11. 11What does Parshell flume measure?

    1. AWater
    2. BAir
    3. CCombustion
    4. DHeat
12. 12Example of a positive displacement meter?

    1. ANutating Disc
    2. BMagmeter
    3. CCoriolis
    4. DUltrasonic
13. 13Derivative mode of control is the same as?

    1. ARate of action
    2. BAcceleration
    3. CStep Change
    4. DSinusoidal Response
14. 14In proportional control, a change in process load can cause a change in?

    1. AOffset
    2. BStep
    3. CRate of Change
    4. DResponse
15. 15What do you do when a process is cycling?

    1. AIncrease proportional band or decrease gain
    2. BSwitch to a PID Controller.
    3. CShut down and restart.
    4. DSwitch to a PI Controller.
16. 16What causes output to go to max or min?

    1. AReset Windup.
    2. BToo Much Derivative.
    3. CToo Much Integral.
    4. DNo Proportional response.
17. 17If in an instrument air line the dew point is 30 degrees and the temperature drops to 20 degrees, what will happen to the air?

    1. AMoisture will condense.
    2. BLine will freeze.
    3. CNothing.
    4. DAir will become saturated.
18. 18A wet/dry thermometer can determine?

    1. ARelative humidity and absolute humidity.
    2. BTemperature and temperature with humidity compensation.
    3. CTemperature for both air and liquids.
    4. DAll of the above.
19. 19The boiling point of water can be raised by?

    1. AIncreasing pressure.
    2. BDecreasing pressure.
    3. CAdding a basic substance.
    4. DAdding an acidic substance.
20. 20Zero psia is equal to
    

    1. A-30" H2O
    2. B-101.3 Psi
    3. C-13 kPa
    4. D-1 Bara
21. 21Instrument air is cooled to?

    1. ARemove Water.
    2. BLower the Dewpoint.
    3. CIncrease the pressure.
    4. DReduce Costs.
22. 22Proportional band is equal to?
    

    1. A∆Input/∆Output * 100
    2. B(Input Value - Output Value) * Gain
    3. CK * ∑E *∆T
    4. DNone of the above.
23. 23What is used to measure when moisture condenses from a gas?

    1. ARVP Analyzer
    2. BDewpoint Analyzer
    3. CTurbidity Analyzer
    4. DChromatograph
24. 24Which filled thermal system requires no compensation for ambient temperature?

    1. AVapor Class II
    2. BVapor Class I
    3. CLiquid Class III
    4. DLiquid Class I
25. 25Stilling wells in a parshall flume are used to?

    1. ARemove Turbulence.
    2. BVent.
    3. CProtect Measuring Elements.
    4. DAll of the above.
26. 26Principle of an orstat?

    1. ARemove CO2 gases.
    2. BMeasure Boiling Point.
    3. CMeasure Entrained Gases.
    4. DMeasure contaminants.
27. 27Hygrometer is used to?

    1. AMeasure Humidity.
    2. BMeasure Water Level.
    3. CMeasure Water Adsorbtion.
    4. DMeasure Water Absorbtion.
28. 28What is the most important thing about well type manometers?

    1. AGives exact readings off scale.
    2. BWetted Materials.
    3. CPressure Rating.
    4. DElectrical Classification.
29. 29Why do you use an incline manometer?

    1. AIt allows for an expanded scale.
    2. BContains the process to the unit.
    3. CWorks without being level.
    4. DCan measure differential pressure,
30. 30What is the principle of a strain gauge?

    1. AIR changes as it stretches.
    2. BMeasures metallic strength.
    3. CMeasures Force.
    4. DNone of the above.
31. 31What is used to measure temperature of 2000 Deg F?

    1. APyrometer
    2. BRTD
    3. CThermocouple
    4. DCombustion Meter
32. 32An optical pyrometer works on what principle?

    1. AAdjusting the lamp to match the color of intensity.
    2. BMeasures Infrared Radiation.
    3. CHeat Energy.
    4. DReflections.
33. 3333. To check a 0 – 100 psi gauge with a dead weight tester, you would check at?

    1. A10 , 50, and 90 Psi
    2. B0, 50, and 100 Psi
    3. C0 and 100 Psi
    4. D0, 25, 50, 75, and 100.
34. 34Where do you measure the tap distance from, when using the vena contracta?

    1. ACenter of the downstream side of the vena contracta.
    2. BCenter of the upstream side of the vena contracta.
    3. CBottom of the downstream side of the vena contracta.
    4. DTop of the downstream side of the vena contracta.
35. 35What adjustment do you make for transmitter non-linearity?

    1. AAngularity.
    2. BSpan.
    3. CZero.
    4. DDeadband.
36. 36What would you use to check a 0 – 30 psi gauge?

    1. ADeadweight Tester
    2. BMercury Manometer
    3. CPressure Pump
    4. DFluke Simulator
37. 3737. A tank filled to 10 ft with a SG of 1.25; find the pressure at the bottom?

    1. A5.415 Psi
    2. B5.415 kPa
    3. C0.3464 Psi
    4. D54.15 Psi
38. 38
    38. A gauge for measuring pressure in a tank containing kerosene, SG 0.8, is mounted 10 ft below the primary connection. Calculate the pressure?
    

    1. A3.47 Psi
    2. B3.47 kPa
    3. C6.94 Psi
    4. D1.23 Psi
39. 39To what side must the tubing be connected to the DP cell to compensate for a change of SG, if SG changes from 1.1 to 1.6?

    1. AHigh side for increasing SG
    2. BHigh side for decreasing SG
    3. CLow side for increasing SG
    4. DLow side for decreasing SG
40. 40If a recorder is accurate at 0 and 100% of reading, and off at 50%, what adjustment should be made?

    1. AAngularity
    2. BLinearity
    3. CRepeatability
    4. DSpan
41. 41A recorder has a linearity problem. What adjustment is to be made?

    1. AChange the linkage length.
    2. BReplace the recorder.
    3. CGet the correct chart paper.
    4. DCalibrate the recorder.
42. 42If the link is moved from hole A to B, what will be affected? (Figure 1)

    

    1. ACoarse range.
    2. BAngularity.
    3. CScale.
    4. DGain.
43. 43An adjustment at D will affect?

    

    1. AAngularity
    2. BCoarse Range
    3. CFine Range
    4. DSpeed
44. 44Adjusting the time arc on a circular recorder will

    1. AMake the pen follow the time line
    2. BIncrease Gain
    3. CIncrease Scale
    4. DSpeed up/slow down the recording
45. 45A Ledoux bell measurement of the output is 3-15 psi. The max difference is 120” of head. What is the output for a head of 60”?

    1. A9 Psi
    2. B6 Psi
    3. C60 kPa
    4. D12 Psi
46. 46When mercury filled transmitters are used to measure steam flow, why are condensate pots required?

    1. ATo keep a constant head.
    2. BTo collect excess mercury.
    3. CTo prevent contamination.
    4. DThey are only necessary on cool process.
47. 47What is the reference junction in the thermocouple?

    

    1. AC
    2. BB
    3. CA
    4. DD
48. 48What is the measuring junction?

    

    1. AA
    2. BB
    3. CC
    4. DD
49. 49Symbol for iron-constantan is?

    1. AJ
    2. BK
    3. CL
    4. DT
50. 50What TC has a slightly magnetic negative lead?

    1. AK
    2. BJ
    3. CL
    4. DT
51. 51On a vertical line, where are the condensate chambers located?

    1. ABoth level and above the orifice plate
    2. BBottom of the line.
    3. CTop of the line.
    4. DBoth level and below the orifice plate
52. 52What mode of control should be used on a high pressure, high capacity boiler?

    1. AThree Element Control
    2. BFeed Forward
    3. CCascade
    4. DPID
53. 53An oil to air ratio is adjusted to give more or less?

    1. AAir
    2. BOil
    3. CHeat
    4. DLime
54. 54Where does the fuel flow control receive its signal?

    1. ASteam Pressure
    2. BBurner Temperature
    3. CO2 Analyzer
    4. DCEMS Analyzer
55. 55The plant master receives its signal from?

    1. APlant Header Steam Pressure.
    2. BWellhead Pressure.
    3. COutput Flow.
    4. DPlant Power Measurement.
56. 56An increase in steam flow will cause the drum level to?

    1. AIncrease
    2. BDecrease
    3. CRemain the Same.
    4. DIs Process Dependent.
57. 57A potentiometer is in balance when the galvanometer indicates?

    1. A0
    2. B100 mV
    3. C10 V
    4. D1V
58. 58A standard cell is used in a potentiometer to?

    1. AStabilize the pot.
    2. BCalibrate the pot.
    3. CDetermine error.
    4. DNone of the above.
59. 59What mili volt signal is applied to represent a pH of 7?

    1. A0
    2. B14
    3. C100
    4. D24
60. 6060. In combustion fuel system, which has the highest pressure, oil or steam?

    1. AOil
    2. BSteam
61. 61What is the trim of a control valve?

    1. AWhatever contacts the process.
    2. BBall, Seat, and Stem.
    3. CSoft Goods
    4. DFCE
62. 62Where do you use a double-ported valve?

    1. AHigh Pressure Drop
    2. BReducing Pressure
    3. CCorrosive Process
    4. DSlurries
63. 63When the reference temperature and the measuring temperature are the same, the output is?

    1. A0
    2. B100
    3. C50
    4. D-50
64. 64Where do you use a single-ported valve?

    1. ATight Shut Off.
    2. BAny Service.
    3. CHigh Pressure.
    4. DCryo Service.
65. 65Why is Teflon used in a valve?

    1. ATeflon does not need lubrication.
    2. BTeflon is inert.
    3. CTeflon is cost effective.
    4. DTeflon is easily pregnable.
66. 66A valve, factory set for 3-15psi, has a bench set of 5 added, where will the valves start to open?

    1. A5 Psi
    2. B3 Psi
    3. C4 Psi
    4. D15 Psi
67. 67A control valve has a Cv of 10 and a pressure drop of 10 psi, what does this mean?
    

    1. A10gpm water flow at 60 degrees with a 1 psi water pressure drop
    2. B100 gpm water flow at 60 degrees with a 1psi water pressure drop
    3. C10 gpm water flow at 100 degrees with a 1 psi water pressure drop
    4. D10 gpm water flow at 60 degrees with a 10 psi water pressure drop
68. 68For signal damping in an electronic recorder?

    1. AAdjust the gain
    2. BCalibrate the sensor
    3. CInstall new electronics
    4. DUpdate the software
69. 69If you remove the cap on a servomotor, what will happen?

    1. AIf running nothing will happen.
    2. BIf stopped the motor will not start.
    3. CAll readings will be lost.
    4. DA & B
70. 70What type of power supply requires the use of a center tap transformer?

    1. AFull Wave
    2. BHalf Wave
    3. CReverse Polarity
    4. DHybird
71. 71To check a diode, one would use a?

    1. AOhm meter
    2. BVolt meter
    3. CPotentiometer
    4. DAmmeter
72. 72What is the advantage of a VTVM?

    1. ADoes not load the circuit being tested
    2. BNo resistance
    3. CIs not able to overload
    4. DNo fuses
73. 73What are the fins used for on a transformer?

    1. AHeat Dissipation
    2. BStatic Dissipation
    3. CTo allow the element to be serviced
    4. DTo protect from interference
74. 74Why do you adjust the spring on an air to open valve?

    1. ATo ensure it closes the valve properly in service.
    2. BTo adjust the flow range.
    3. CTo match the air supply.
    4. DAll of the above.
75. 75In a conductivity measurement, the reading was 500 micro Ohms and the constant was 0.1. What is the reading in resistance?

    1. A200
    2. B500
    3. C1000
    4. D100
76. 76What is the waveform for full wave rectification?

    1. AM Style
    2. BS Style
    3. CZ Style
    4. DC Style
77. 77If a 10 ohm, 20 ohm, 40 ohm, and 80 ohm resistors are connected in series, which will dissipate the most heat?

    1. A80
    2. B40
    3. C20
    4. D10
78. 78What will an P/I instrument do?

    1. AConvert pressure to current.
    2. BConvert pressure to volts.
    3. CConvert current to pressure.
    4. DNothing
79. 79If the voltage remains constant and the resistance increases, what will the current do?

    1. ADecrease
    2. BIncrease
    3. CNothing
    4. DAll of the above
80. 80What current will a 600W solder iron draw for voltage?

    1. A5.45
    2. B6
    3. C100
    4. D60
81. 81What recorder uses a wheatstone bridge in measuring?

    1. AResistance Recorder
    2. BChart Recorder
    3. CDigital Recorder
    4. DElectronic Recorder
82. 82What does Q1, Q2, Q3, & Q4 make up? (Recorder Amp Circuit)

    1. AChopper Circuit
    2. BMotor Circuit
    3. CPanel Circuit
    4. DAll of the above.
83. 83What happens if D2 opens? (Recorder Amp Circuit)

    1. AThere will be no output.
    2. BRecorder will start to move.
    3. CSystem powers up.
    4. DNothing.
84. 84What is the voltage across the servo control circuit? (Recorder Amp Circuit)

    1. A12V
    2. B15V
    3. C24V
    4. D48V
85. 85How many DC supplies are there? (Recorder Amp Circuit)

    1. A1
    2. B2
    3. C3
    4. D4
86. 86What is the purpose of C8? (Recorder Amp Circuit)

    1. APart of the resonant circuit.
    2. BBoard Capacitor.
    3. CInput Bypass.
    4. DNone of the above.
87. 87The diode of a PNP transistor is always biased?

    1. AForward (-)
    2. BForward (+)
    3. CBackward (-)
    4. DBackward (+)
88. 88Beta gain of a transistor is?

    1. AIc/Ib
    2. BIb/Ic
    3. CIa/Ib
    4. DIb/Ia
89. 89What is a positioner used for?

    1. ATo position the valve plug.
    2. BTo indicate the position.
    3. CTo move equipment around the plant.
    4. DTo increase air volume.
90. 90What is always constant in a series circuit?

    1. ACurrent
    2. BVoltage
    3. CResistance
    4. DPower
91. 91Why are shims used on a vee-ball?

    1. ATo provide Tight shut-off.
    2. BTo indicate Valve position.
    3. CTo guarantee a leak free install.
    4. DAll of the above.
92. 92On a continuous weight system, what do you need to know?

    1. ASpeed
    2. BWeight
    3. CLength
    4. DTime
93. 93What is the bias of an NPN transistor?

    1. AReverse (+)
    2. BReverse (-)
    3. CForward (+)
    4. DForward (-)
94. 94The hydroscopic moisture of a material depends upon?

    1. ARelative Humidity
    2. BSpecific Gravity
    3. CDensity
    4. DViscosity
95. 95How are AC and DC compared?

    1. AHeating effect
    2. BPower rating
    3. CPolarity
    4. DCapacity
96. 96What is the difference between redox and pH measurement?

    1. AThe kind of ion being measured
    2. BAcidic vs Basic
    3. COne includes turbidity
    4. DOne cannot be calibrated
97. 97A S.G. of a solution of 2.5 means?

    1. A2.5 Times Heavier than water
    2. B2.5 Times Heavier than air
    3. C2.5 Times Lighter than water
    4. D2.5 Times Lighter than air
98. 98A variable area meter is used to measure?

    1. AFlow
    2. BPressure
    3. CTemperature
    4. DDensity
99. 99Refractometer determines the?

    1. AThe refractive index of solutes
    2. BThe refraction of light
    3. CRadiation
    4. DAll of the above
100. 100Thermistors have a?

     1. ANegative temperature coefficient
     2. BPositive temperature coefficient
     3. CTemperature multiplier
     4. DAll of the above
101. 101The difference between the Ledeux Bell and a DP cell is?

     1. ALedeux Bell is linear
     2. BDP cell is linear
     3. CLedeux bell requires no electronics
     4. DThey are the same
102. 102With a magnetic flow meter, the EMF generated?

     1. Ais directly proportional to flow
     2. Bis inversely proportional to flow
     3. Cis a factor of the flow
     4. Dcorrelates to the density of the measured fluid
103. 103A butterfly valve is never stroked more than 60% open because?

     1. AFlow increases only slightly after 60%
     2. BTo reduce wear
     3. CIncreased chance of sticking or jamming
     4. Dactuators are not sized to open farther than 60%
104. 104A controller with a gain of 2 gives 3psi out for 3psi in. If the input is 8psi, the output will be?
     

     1. A13 Psi
     2. B8 Psi
     3. C15 Psi
     4. D0 Psi
105. 105Hydrogen is used in the oxygen analyzer for?

     1. ACatalytic Combustion
     2. BCarrier Gas
     3. CFuel
     4. DZero Gas
106. 106Temperature compensation is used in pH measurement to compensate for?
     

     1. AProbes and temperature changes of the solution
     2. BPhase Change
     3. CTo account for density changes
     4. DAll of the above
107. 107A buffer solution is made to?

     1. AResist changes in pH
     2. BTest an acid
     3. CTest a base
     4. DTo measure ORP
108. 108Flow control typically uses?

     1. APID
     2. BP + Manual Reset
     3. CPI
     4. DPD
109. 109Venturi tubes are used when ___________ is required?

     1. AA Small Pressure Drop
     2. BLinear flow
     3. CHigh Accuracry
     4. DHigh Repeatibility
110. 110Proportional band is equivalent to?

     1. APB = 100/Gain
     2. BPB = 1/Kc
     3. CPB = Gain
     4. DPB = Manual Reset
111. 111What is used to measure when moisture will turn to condensate from gas?

     1. ADew Point Analyzer
     2. BRVP
     3. CGas Chromatograph
     4. DCGA
112. 112Which filled thermal system requires no compensation for ambient temp?
     

     1. AVapor Class II
     2. BVapor Class I
     3. CVapor Class III
     4. DLiquid Class II
113. 113Stilling wells in a Parshall Flume are used for?

     1. ARemoving turbulence
     2. BReducing Emissions
     3. CCleaning Particulate from Emissions
     4. DAll of the above.
114. 114Principal of an orstat?

     1. AMeasuring CO2
     2. BMeasuring SOx
     3. CMeasuring NOx
     4. DAll of the above
115. 115Hygrometer?

     1. AMeasures Humidity
     2. BMeasures Water Level
     3. CMeasures Relative Humidity
     4. DAll of the above.
116. 116What is the most important thing about Well Type Manometers?

     1. AGive exact readings off scale
     2. BPressure Rating
     3. CTemperature Rating
     4. DFluid to be measured
117. 117Why do you use an inclined manometer?

     1. ATo have an expanded scale.
     2. BPrevent process contamination.
     3. CMeasure differential pressure.
     4. DAll of the above.
118. 118What is the principle of strain gauges?

     1. AResistance
     2. BStress
     3. CTorsion
     4. DHardness
119. 119If the hole in an orfice plate is 1.25” and the ratio is 0.333, what is the ID of the pipe?
     

     1. A3.75"
     2. B4"
     3. C2"
     4. D3"
120. 120Orfice Plate taps for gas?

     

     1. AA
     2. BB
     3. CC
     4. DD
     5. EE
121. 121Orfice Plate taps for liquid?

     

     1. AA
     2. BB
     3. CC
     4. DD
     5. EE
122. 122The purpose of a lock-out/tag-out procedure is to:

     1. AImprove productivity on the job
     2. BSecure harmful energy sources to prevent injury
     3. CSlow down work so technicians are less stressed
     4. DSave money
     5. EIdentify personal items to avoid theft
123. 123The purpose of CPR is to:

     1. AMaintain oxygenated blood circulation
     2. BStabilize body temperature to avoid hypothermia
     3. CBuild upper body strength
     4. DDislodge blood clots within the victim’s lungs
     5. EPrevent infection resulting from open wounds
124. 124The very first thing you should do if you are the first to witness or discover an accident on the job site is to:

     1. AGo find at least one co-worker to help you so you can work as a team
     2. BGo to the scene and help the person(s) injured
     3. CFind and fill out the necessary forms to document the incident
     4. DActivate the emergency response system (equivalent to dialing “911”)
     5. EContact your supervisor to report the incident
125. 125The purpose of a cartridge-style respirator is to:

     1. AReduce the concentration of particulates in the air you breathe
     2. BProvide a pure oxygen breathing environment where there is insufficient oxygen in the air
     3. CEnhance your personal appearance for maximum social appeal
     4. DConvert exhaled carbon dioxide back into oxygen for re-breathing
     5. EReduce noxious odors in the air you breathe
126. 126Shock is defined as an abnormal condition of the body where:

     1. AA broken bone has penetrated the skin
     2. BThe lungs are unable to process oxygen properly
     3. CThe muscles in the body have “frozen” and will not move
     4. DThe heart stops beating normally, and “quivers” instead
     5. EThere is insufficient blood delivered to the body’s cells
127. 127A confined space is deemed ready for employee entry when:

     1. AA company safety inspector has certified it
     2. BThe unit operations foreman declares it ready
     3. CAn engineer has completed the necessary calculations
     4. DYour supervisor assigns you to the job
     5. EAn independent inspection agency has completed their survey
128. 128One of the common signs of a heart attack is:

     1. AA sharp pain in the lower area of the spine
     2. BLoss of bowel control
     3. CA feeling of numbness in the legs
     4. DDiscomfort in the chest and/or upper body
     5. EA general feeling of restlessness and anxiety
129. 129Heat stroke is often indicated by the following symptoms:

     1. AA sudden affinity for country-western music
     2. BDizziness, vomiting, cold skin, profuse sweating
     3. CCold and clammy skin, thirst, vomiting, confusion
     4. DHot and dry skin, inability to drink, vomiting, confusion
     5. EBlue-colored skin, extreme hunger, feelings of anxiety, thirst
130. 130Arc blast is caused by:

     1. APoor contact within electrical wire splices
     2. BRadio frequency emissions from high-power transmitters
     3. CDischarge of high electrical current through open air
     4. DFailure to lock-out and tag-out electrical breakers
     5. EIonization of gases near high-voltage electrical conductors
131. 131Current measurements are more dangerous to make with a multimeter than voltage measurements
     because:

     1. AYou must use both hands to take the measurement
     2. BMost multimeters are unfused
     3. CThe resulting magnetic fields may be very strong
     4. DThe circuit must be broken (opened)
     5. EA fuse protects the voltage measurement ranges, but not current
132. 132Manipulate the following equation to solve for x: y = x/ab

     1. Ax = y/ab
     2. Bx = aby
     3. Cx = ay/b
     4. Dx = a/by
     5. Ex = ab/y
133. 133Manipulate the following equation to solve for x: a = (bx^2)^1/2

     1. Ax = a/(b)^1/2
     2. Bx = (ab)^1/2
     3. Cx = (a/b)^1/2
     4. Dx = (a/b)^2
     5. Ex = (a)^2/b
134. 134Which of the following equations describes this graph?

     

     1. Ay = 3x
     2. By = 3x + 2x
     3. Cy = x + 2
     4. Dy = 2 - x
     5. Ey = -2x
135. 135Which of the following equations describes this graph?

     

     1. Ay = (x)^1/2
     2. By = x^2
     3. Cy = 2x
     4. Dy = (x)^1/3
     5. Ey = (x)^-2
136. 136Solve for both x and y in this simultaneous system of equations:
     x + 3y = -1
     4x - y = 9

     1. Ax = 2 ; y = 1
     2. Bx = 2 ; y = -1
     3. Cx = 1 ; y = 2
     4. Dx = -2 ; y = 1
     5. Ex = -1 ; y = 2
137. 137Which of the following ratios is equivalent to the ratio 25:300 ?

     1. A1:12
     2. B15:4
     3. C15:1
     4. D17:5
     5. E5:17
138. 138Select the equivalent expression:
     1/ (x)^1/3
     

     1. A-(x)^1/3
     2. B(x)^3/2
     3. C(x)^-3/2
     4. D(x)^2/3
     5. E(2x)^-1/3
139. 139Calculate 27% of 340.

     1. A88.8
     2. B91.8
     3. C12.6
     4. D79.4
     5. E81.0
140. 140Factor the following polynomial expression:
     x^2 − x − 12

     1. A(x + 2)(x − 6)
     2. B(x + 4)(x − 3)
     3. C(x + 3)(x − 4)
     4. D(x + 1)(x − 12)
     5. E(x + 12)(x − 1)
141. 141The sine function is defined as ratio of side lengths,

     1. AHypotenuse divided by adjacent
     2. BOpposite divided by hypotenuse
     3. COpposite divided by adjacent
     4. DAdjacent divided by hypotenuse
     5. EAdjacent divided by opposite
142. 142Calculate the length of side x in this right triangle:

     

     1. A10.3
     2. B10.8
     3. C9.43
     4. D3.74
     5. E4.00
143. 143Calculate the angle Theta in this right triangle:

     

     1. A38.68 Deg
     2. B51.32 Deg
     3. C64.44 Deg
     4. D57.99 Deg
     5. E1.012 Deg
144. 144Calculate the angle Beta in this right triangle:

     

     1. A19.80 Deg
     2. B50 Deg
     3. C45 Deg
     4. D14 Deg
     5. EPi/4
145. 145A model rocket enthusiast wants to approximately measure the peak altitude of her rocket by measuring
     the angle from horizontal (Beta) sighting the rocket at its apogee and the distance from the launch pad to the
     point of observation. Which trigonometric function will she need to use in order to calculate the rocket’s
     height?
     

     

     1. ATangent
     2. BCosine
     3. CCosecant
     4. DSine
     5. ESecant
146. 146Add these two complex numbers and express the sum in polar notation:
     (5 − j3) + (−8 − j10)

     1. A14.765 /_ 28.3 Deg
     2. B14.765 /_ 61.7 Deg
     3. C−3 + j13
     4. D13.342 /_ -103 Deg
     5. E18.385 /_ -45 Deg
147. 147Complex numbers are used in AC circuit analysis primarily to represent:

     1. AFrequency
     2. BAmplitude and phase shift
     3. CPower
     4. DBandwidth and harmonic content
     5. EGain and attenuation factors
148. 148Calculate the length of side A in this non-right triangle:

     

     1. A12
     2. B18.67
     3. C11.06
     4. D12.77
     5. E15.48
149. 149Convert an angle of 75 degrees into radians:

     1. A1.571 radians
     2. B1.309 radians
     3. C0.7854 radians
     4. D1.178 radians
     5. E3.142 radians
150. 150If the cosine of angle Beta is equal to 0.5, and the length of the opposite side is 20 meters, calculate the
     length of the hypotenuse.

     1. A20.01 meters
     2. B40 meters
     3. C17.32 meters
     4. D23.09 meters
     5. E44.72 meters
151. 151An atom of Lead (Pb) has an atomic number of 82, and an atomic mass of 207. How many neutrons
     does the nucleus of one Lead atom contain?

     1. A289
     2. B82
     3. C125
     4. D110
     5. E207
152. 152An alkaline solution has a pH value . . .

     1. Aat least 11
     2. Bgreater than 6
     3. Cgreater than 7
     4. Dless than 6
     5. Eless than 7
153. 153A catalyst is a substance that . . .

     1. Amoderates the velocities of neutrons in a fission reaction
     2. Baccelerates a chemical reaction without being consumed
     3. Cbuffers an alkaline solution for a more stable pH value
     4. Dpolarizes light so that the waves are oriented in one plane
     5. Edissolves in water to form an ionic solution
154. 154Use the Ideal Gas Law to calculate the volume of an ideal gas sample containing 1 mole of gas at 20
     degrees C and at a pressure of 2 atmospheres.

     1. A1.687 liters
     2. B11.21 liters
     3. C12.03 liters
     4. D0.821 liters
     5. E178.5 liters
155. 155A chemical reaction that requires a net input of energy is called:

     1. ASpontaneous
     2. BCatalytic
     3. CEndothermic
     4. DEctomorphic
     5. EEquipotential
156. 156Calculate the kinetic energy of an object moving at a speed of 15 meters per second, having a mass of
     40 kilograms.

     1. A9,000 joules
     2. B600 joules
     3. C300 joules
     4. D4,500 joules
     5. E12,000 joules
157. 157Calculate the gravitational potential energy of a 50 kilogram mass lifted 24 meters vertically above the
     ground.

     1. A11,760 joules
     2. B14,400 joules
     3. C1,200 joules
     4. D5,880 joules
     5. E600 joules
158. 158Calculate the angle of the incline necessary so that the cart (on wheels) and the suspended mass precisely
     balance one another in this cable-and-pulley system. The mass is 450 kg and the cart is 1370 kg:

     

     1. A23.21 Deg
     2. B15.08 Deg
     3. C70.82 Deg
     4. D19.18 Deg
     5. E18.18 Deg
159. 159The tension in the cable holding up the sign is . . .

     

     1. Aless than the weight of the sign
     2. Balways changing with temperature
     3. Cequal to the weight of the sign
     4. Dgreater than the weight of the sign
     5. Ea negative quantity
160. 160The latent heat of vaporization for water is . . .

     1. Aless than the specific heat
     2. Bgreater than the melting point
     3. Cless than the latent heat of fusion
     4. Dgreater than the latent heat of fusion
     5. Eequal to the latent heat of fusion
161. 161Determine the voltage dropped across resistor R3 in this circuit:

     

     1. A7.5 volts
     2. B3.0 volts
     3. C6.6 volts
     4. D15 volts
     5. E5.5 volts
162. 162Calculate total current in this circuit:

     

     1. A8.000 mA
     2. B7.835 mA
     3. C8.168 mA
     4. D493.8 μA
     5. E5.333 mA
163. 163Calculate the necessary resistor value (R) to balance this bridge circuit:

     

     1. A7.299 K ohms
     2. B6.464 K ohms
     3. C9.656 K ohms
     4. D8.501 K ohms
     5. E5.830 K ohms
164. 164Calculate the necessary resistor size for R1 to make the total circuit current equal to 30 milliamps:

     1. A2.143 K Ohms
     2. B1.500 K Ohms
     3. C967.7 K Ohms
     4. D666.7 K Ohms
     5. E310.0 K Ohms
165. 165Calculate the current through resistor R4 in this circuit:

     

     1. A1.226 mA
     2. B441.5 μA
     3. C1.668 mA
     4. D4.054 mA
     5. E8.994 mA
166. 166Voltages and currents in an RC or LR time-constant circuit will settle to within 1% of their final value(s)
     in how many time constants?

     1. A10
     2. B3
     3. C5
     4. D2
     5. E4
167. 167How much voltage will a DMM register if connected with the red test lead on point B and the black
     test lead on point D?

     

     1. A+15 volts
     2. B-33 volts
     3. C+33 volts
     4. D-9 volts
     5. E-15 volts
168. 168Calculate the voltage between test point B and ground in this circuit:

     

     1. A20 volts
     2. B18 volts
     3. C2 volts
     4. D6 volts
     5. E16 volts
169. 169Determine the magnitude and direction of current through resistor R4 in this circuit:

     

     1. A240 mA -> (left to right)
     2. B160 mA <- (right to left)
     3. C200 mA -> (left to right)
     4. D240 mA <- (right to left)
     5. E160 mA -> (left to right)
170. 170Determine the magnitude and polarity of the voltage across resistor R4 in this circuit:

     

     1. A- 1.0 volt + (negative on left, positive on right)
     2. B- 7.0 volts + (negative on left, positive on right)
     3. C+ 0.5 volts - (positive on left, negative on right)
     4. D- 3.5 volts + (negative on left, positive on right)
     5. E+ 4.0 volts - (positive on left, negative on right)
171. 171What will happen to the current in this circuit as frequency increases?

     

     1. ACurrent will remain the same
     2. BCannot tell – not enough information given
     3. CCurrent will decrease
     4. DCurrent will decrease to a minimum and then increase
     5. ECurrent will increase
172. 172Resonance is defined as a condition in an AC circuit when:

     1. Ano more magnetic flux may be forced into an iron core
     2. Bopposition to electric current varies with frequency
     3. Cvoltage and current waveforms are exactly 90o out of phase
     4. Delectrons are able to “tunnel” across an energy gap
     5. Ecomplementary reactances are equal and opposite
173. 173Calculate the source and load currents in this transformer circuit:

     

     1. AIsource = 77.22 mA Iload = 283.6 mA
     2. BIsource = 187.5 mA Iload = 72.73 mA
     3. CIsource = 186.5 mA Iload = 72.53 mA
     4. DIsource = 164.2 mA Iload = 63.66 mA
     5. EIsource = 72.53 mA Iload = 186.5 mA
174. 174The function on an oscilloscope that “locks in” waveforms so that they do not scroll horizontally across
     the screen is called the ___________.

     1. AHorizontal sync
     2. BTimebase
     3. CBeam finder
     4. DTrigger
     5. ECursor
175. 175A voltage gain of 25 (expressed as a unitless ratio) may also be expressed as decibels (dB).

     1. A17.78
     2. B7.959
     3. C64.38
     4. D13.98
     5. E27.96
176. 176In an AC circuit where current lags voltage by 35o, the power factor is:

     1. A0.707
     2. B0.574
     3. C0.700
     4. D1.414
     5. E0.819
177. 177Determine the frequency of this waveform shown on an oscilloscope screen:

     

     1. A250 Hz
     2. B0.4 Hz
     3. C10 kHz
     4. D10 Hz
     5. E400 Hz
178. 178Calculate the RMS value of this triangle wave, as shown by the oscilloscope:

     

     1. A17.31 volts
     2. B30 volts
     3. C3.2 volts
     4. D21.21 volts
     5. E32 volts
179. 179If a communications cable has a characteristic impedance of 75 ohms, this means:

     1. AThe cable’s end-to-end resistance is 75 ohms
     2. BThe cable’s conductor-to-conductor resistance is 75 ohms
     3. CThe cable should be terminated with a resistance equal to 37.5 ohms
     4. DThe cable’s conductor resistance is 75 ohms per mile of length
     5. EThe cable appears to a pulse signal as a 75 ohm load
180. 180A low pass filter is a circuit that performs the following function:

     1. AModifies the shape of an AC wave
     2. BBlocks low-frequency signals from passing through
     3. CPasses only the negative (low) portions of an AC wave
     4. DBlocks high-frequency signals from passing through
     5. EAttenuates low-frequency signals
181. 181The heating element used in an industrial electric boiler is rated at 15 kW, at 480 volts, 3 phase.
     Calculate the current drawn by each line of this 3-phase heater.

     1. A18.48 amps
     2. B31.25 amps
     3. C32.00 amps
     4. D18.04 amps
     5. E10.42 amps
182. 1823-phase electrical systems are favored over single-phase systems for power distribution because:

     1. AIt would be expensive to convert everything to single phase
     2. B3-phase systems are easier to understand
     3. CSingle-phase electric motors are more rugged
     4. DMore power may be transmitted using less copper (wire)
     5. E3-phase power is easier to step voltage up and down
183. 183An AC induction motor works on the principle of:

     1. AThe Lorentz force
     2. BA rotating magnetic field
     3. CVoltage stepped up through mutual induction
     4. DMagnetic hysteresis
     5. EMagnetostriction converting magnetism to force
184. 184Variable frequency drives, or VFDs, are popular in industry for electric motor control because:

     1. AThey increase the available horsepower from a motor
     2. BThey cost less than an across-the-line starter
     3. CThey potentially save energy
     4. DThey make the motor run quieter
     5. EThey increase the available torque from a motor
185. 185The “M1” contact in the low-voltage control circuit serves the purpose of:

     

     1. AProtecting the motor from overcurrent conditions
     2. BEnsuring the motor will stop even if the “stop” switch fails
     3. CProviding a fail-safe state for the motor
     4. DIndicating when the motor is running
     5. ELatching the motor in the “run” state
186. 186Overload heaters and overload contacts work together to:

     1. AProtect the motor against mild overcurrent conditions
     2. BProtect the motor against mechanical overloading
     3. CProtect the motor against massive overcurrent conditions
     4. DProtect the motor against lubrication failures
     5. EProtect the power lines against overcurrent conditions
187. 187Calculate the amount of voltage between points A and B in this balanced three-phase circuit, assuming
     a generator phase voltage of 4160 volts:

     

     1. A27.73 V
     2. B2.080 kV
     3. C4.160 kV
     4. D7.205 kV
     5. E48.04 V
188. 188A single-phase AC electric motor draws 54.7 amps while being powered by a 240 volt source. Assuming
     perfect power factor (1.0) and an efficiency of 87%, calculate the mechanical horsepower output by this
     motor.

     1. A20.24 hp
     2. B17.18 hp
     3. C14.95 hp
     4. D15.32 hp
     5. E17.60 hp
189. 189A synchronous motor differs from an induction motor by the fact that . . .

     1. Ait operates on DC instead of AC
     2. Bit uses fewer poles
     3. Cit must be properly “timed"
     4. Dits speed is constant
     5. Eit uses brushes
190. 190DC motors are used in industry where . . .

     1. Athe motor must tolerate constant vibration
     2. Bsuperior low-speed torque is needed
     3. Clow maintenance is necessary
     4. Dthe motor’s speed must remain constant
     5. Eexplosive gases may be present
191. 191P-type semiconductor materials are made to be that way due to ___________ doping.

     1. Aintrinsic
     2. Bnonvalent
     3. Cpentavalent
     4. Dextrinsic
     5. Etrivalent
192. 192Identify the labels used to describe the left- and right-hand leads on this diode (respectively):

     

     1. AAnion and cation
     2. BCation and anion
     3. CCathode and anode
     4. DAnode and cathode
     5. EPentode and tetrode
193. 193Identify the terminals of this transIdentify the terminals of this transistor:

     

     1. A1 = Drain ; 2 = Gate ; 3 = Source
     2. B1 = Emitter ; 2 = Base ; 3 = Collector
     3. C1 = Source ; 2 = Gate ; 3 = Drain
     4. D1 = Gate ; 2 = Emitter ; 3 = Drain
     5. E1 = Collector ; 2 = Base ; 3 = Emitter
194. 194A Hall Effect device is a component typically used to . . .

     1. Ameasure an electrical resistance
     2. Bdetect vibration in machinery
     3. Csuppress transient voltages
     4. Dswitch current on and off
     5. Emeasure magnetic field strength
195. 195Estimate the amount of voltage between point A and ground in this transistor amplifier circuit under
     quiescent conditions. Assume an ideal silicon transistor:

     

     1. A14.4 volts
     2. B2.61 volts
     3. C9.31 volts
     4. D1.91 volts
     5. E19.3 volts
196. 196Calculate the voltage between point A and ground in this operational amplifier circuit:

     

     1. A-2.00 volts
     2. B-2.58 volts
     3. C+2.58 volts
     4. D-5.96 volts
     5. E+3.96 volts
197. 197Estimate the DC output voltage of this power supply circuit, when unloaded. Assume the use of silicon
     rectifying diodes:

     

     1. A42.4 volts
     2. B18.6 volts
     3. C19.3 volts
     4. D20.0 volts
     5. E26.9 volts
198. 198When the pushbutton switch is actuated, the LED will:

     

     1. Aturn on
     2. Bturn off
     3. Cburn up
     4. Dblink on and off
     5. Ebecome dim
199. 199The following circuit is typically used to:

     

     1. Acontrol motor speed
     2. Bcontrol motor torque
     3. Cchange motor direction
     4. Dlimit motor current
     5. Econtrol motor frequency
200. 200Identify the function of this DC-DC converter circuit:

     

     1. ABoost or Buck voltage ; same output polarity as input
     2. BBoost voltage ; same output polarity as input
     3. CBuck voltage ; same output polarity as input
     4. DBoost voltage ; inverted output polarity
     5. EBuck voltage ; inverted output polarity

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Quiz on Red Seal Exam, created by Brennan Brow on 13/01/2017.

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