1. A Resistor is....
A. A component which resists A.C. current
B. A component which resists D.C. current
C. A component which resists A.C. Voltage
D. A component which resists D.C. Voltage
E. All of the above
F. B and D Above
G. A and B Above
2. A Capacitor is ....
A. A component which restricts D.C. current
B. A component which restricts A.C. current
C. Often used in Power supplies to bypass high
frequencies
D. All of the above
E. A and C above
F.
B and C
above
3. An Inductor is ....
A. A component which restricts D.C. current
B. A component which restricts A.C. current
C. Often used in Power supplies to bypass low
frequencies
D. All of the above
E. A and C above
F.
B and C
above
4. A Transistor
A. Can be used to amplify a signal
B. Can be used to control current
C. Can be used to control voltage
D. All of the above
E. A and B above
5. A Basic Diode
A. Is used to pass current in one direction
B. Can be used to amplify a signal
C. Will be damaged if it is reverse biased.
D. None of the above
E. A and C above
6. A Triac
A. Is often used as a series regulator in D.C.
applications
B. Is often used to control A.C. voltages
C. Can not be used in A.C. circuits
D. A and C above
E. None of the above
7. A SCR
A. Is often used as a "Crowbar" circuit
to short circuit D.C. power supplies in the event of over-voltage.
B. Is often used in local oscillator circuits to
change operating frequencies.
C. Can be used to absorb reflection at the end of
a transmission line.
D. All of the above
E. A and C above
8. Voltage is
A. The flow of electrons through a resistance
B. The build up of electrons on a conductive
surface
C. The ability to limit current through a
conductor
D. None of the above
9. Current is
A. The flow of electrons through a resistance
B. The build up of electrons on a conductive
surface
C. The ability to limit current through a
conductor
D. None of the above
10. A Zener Diode
A. Only allows current to flow through it in a
reverse bias situation
B. Will be damaged if a current flows through it
in a reverse bias condition
C. Allows current to flow in both the normal bias
and reverse biased direction if the reverse breakdown voltage is exceeded.
D. A and C above
E. None of the above
12. A Thermistor
A. Changes capacitance when temperature
changes
B. Changes resistance when temperature changes
C. Cannot be used in A.C. circuits
D. A and C above
E. B and C above
13. Forward Bias is
A. The only way that semiconductors are biased
B. A positive potential on the base of a
transistor with respect to the collector.
C. A negative potential on the Collector of a
transistor with respect to the emitter
D. Allowing current to flow through a variable
resistor
E. None of the above
14. A Voltage Regulator
A. Can be as simple as a series resistor in a
D.C. circuit
B. Can be as simple as a series transistor in a
D.C. circuit
C. Can be as simple as a diode and a capacitor
D. Cannot be designed without integrated
circuits
E. A B and C above
15. Linear Amplification
A. Is often used in the final stages of R,F.
transmitters
B. Is required when reproducing clear audible
information
C. Is obtained with a class C amplifier
D. All of the above
E. A and B above
16. Draw 2 resistances in series
with each other across a D.C. voltage source.
17. Designate a voltage for
the above battery and assign arbitrary resistance values for the
resistors. (Make the resistor values
different.)
18. Calculate the voltage drop
across each resistor.
19. Calculate the current
through each resistor.
20. Repeat steps 16 through 19
with two parallel resistors.
21. Two batteries connected in
series....
A. Combine current specifications
B. Combine voltage specifications
C. Must be the same voltage or internal damage
will result
D. A and C above
E. B and C above
22. Two batteries connected in
parallel....
A. Combine current specifications
B. Combine voltage specifications
C. Must be the same voltage or internal damage
will result
D. A and C above
E. B and C above
23. Draw a 1000:1 resistive
divider.
24. Voltage leads current in
which of the following sitautions?
A. In a resistive circuit
B. In a capacitive circuit
C. In an inductive circuit
D. Never
E. Voltage is always slightly ahead of current in
a timing chart.
25. What is the period time of a
10 KHz sine wave?
A. 0.0001 Seconds
B. 0.001 Seconds
C. 0.0005 Seconds
D. 0.005 Seconds
26. What is a subcarrier?
A. The RF frequency which is sent to an antenna
for transmission into the atmosphere.
B. The information signal which is superimposed on
a carrier frequency for transmission into the atmosphere.
C. The signal which is sent to an antenna for
further modulation.
D. A and C above
E. None of the above
27. What does a local oscillator
do in a radio circuit?
A. Mixes the R.F. carrier and the I.F. signal to
produce an audible frequency.
B. Beats with the changing R.F. signal to produce
an audible frequency.
C. Mixes with the R.F. signal to produce the IF
frequency.
D. None of the above
28. What does IF Amp do in a
radio circuit?
A. Amplifies the output of the R.F. amplifier
B. Amplifies the output of the Audio amplifier
C. Amplifies the output of the mixer stage
D. Amplifies the output of the audio discriminator stage
29. What does the Audio Amp do in
a radio circuit?
A. Amplifies the signal from the I.F. amplifier to
produce sound in the speakers.
B. Amplify the signal from the Discriminator to
produce sound in the speaker.
C. Amplify the signal from the R.F. amplifier
section
D. None of the above
E. A and C above
30. What is a mixer?
A. A free running oscillator.
B. An electronic circuit which combines 4 or
more signals
C. An electronic circuit which combines 2 or
more signals
D. A and B above
E. A and C above
31. What is the purpose of
filament in a CRT?
A. To illuminate when electrons strike it
B. To control the current in the electron beam
C. To heat up and allow the release of electrons
D. To absorb static electricity surrounding the
tube and short it to ground.
E. None of the above.
32. What is the purpose of Grids in a CRT?
A. To illuminate when electrons strike it
B. To control the current in the electron beam
C. To heat up and allow the release of electrons
D. To absorb static electricity surrounding the
tube and short it to ground.
E. None of the above.
33. What is the purpose of
phosphor in a CRT?
A. To illuminate when electrons strike it
B. To control the current in the electron beam
C. To heat up and allow the release of electrons
D. To absorb static electricity surrounding the
tube and short it to ground.
E. None of the above.
34. What is the purpose of the
Aquadag coating in a CRT?
A. To illuminate when electrons strike it
B. To control the current in the electron beam
C. To heat up and allow the release of electrons
D. To absorb static electricity surrounding the
tube and short it to ground.
E. None of the above.
35. What is the purpose of RAM
memory in a physiologic monitor?
A. To temporarily store the waveform data.
B. To temporarily store the software data.
C. To permanantly store the waveform data.
D. To permanantly store the software data.
E. None of the above.
36. What is the purpose of ROM
memory in a physiologic monitor?
A. To temporarily store the waveform data.
B. To temporarily store the software data.
C. To permanantly store the waveform data.
D. To permanantly store the software data.
E. None of the above.
37. What is a DAC?
A. A device which converts digital signals to a
corresponding voltage.
B. Stands for Analog to Digital Converter
C. A and B above
D. None of the above
38. What is a Multiplexer?
A. A device used to combine signals
B. An electronic circuit that creates random
character generation.
C. A device used to isolate
electric circuits for patient protection.
D. A and C above
E. B and C above
39. What is a Bilateral Switch?
A. An mechanical component which resembles a
toggle switch and is controlled by a computer.
B. An electronic component which resembles a
toggle switch and is controlled by a digital signal.
C. Often used to control the amount of 120 Volt
A.C. in dimmer switches since it conducts in two directions.
D. Often used as a series D.C. regulator
E. None of the above
40. Explain a Thermodilution
Cardiac Output Measurment.
A. A bolus of iced temperature solution is
injected into the heart. The temperature is measured to develop a temperature
curve. This curve is calculated to give an approximation of cardiac output.
B. A bolus of room temperature solution is injected
into the heart. The temperature is measured to develop a temperature curve.
This curve is calculated to give an approximation of cardiac output.
C. A and B above
D. A dye is injected into the femoral artery going
to the heart. The time for the dye to leave the heart is calculated and used to
measure cardiac output.
E. None of the above
41. What is AM?
A. The ability to transmit static free signals
through the air.
B. The modulation technique used to transmit the
video carrier for television.
C. The modulation technique used to transmit the
audio carrier for television.
D. Amplitude Modulation.
E. All of the above
F. B and D above
G. C and D above
42. What is FM?
A. The ability to transmit static free signals
through the air
B. The modulation technique used to transmit the
video carrier for television.
C. The modulation technique used to transmit the
audio carrier for television.
D. Frequency Modulation.
E. All of the above
F. B and D above
G. C and D above
43. What does EMG stand for?
A. A high cholesterol product produced by
chickens.
B. Electroencephalograph
C. Electroemography
D. Electromyograph
E. None of the above
44. What does EEG stand for?
A. A high cholesterol product produced by
chickens.
B. Electroencephalograph
C. Electroemography
D. Electromyograph
E. None of the above
45. Coronary Arteries receive
their primary blood supply when?
A. During Systole
B. During Diastole
C. Between Systole and Diastole
D. Constantly
E. They do not require blood supply since they surround the heart and
always have oxygen.
46. Explain the difference
between shock and macroshock.
A. Macroshock can always be felt and will result
in death. Microshock can usually be
felt and will result in death.
B. Macroshock can always be felt and may result in
death. Microshock will never result in death.
C. Either Macroshock of Microshock may not be felt
but might result in death.
D. Macroshock will always be felt and may result
in death. Microshock may not be felt and may result in death.
E. None of the above.
47. What color is a medical grade
O2 tank?
A. Green
B. Blue
C. Yellow
D. Gray
E. None of the above
48. What color is a medical grade
CO2 tank?
A. Green
B. Blue
C. Yellow
D. Gray
E. None of the above
49. What color is a medical grade
Nitrogen tank?
A. Green
B. Blue
C. Yellow
D. Gray
E. None of the above
50. What color is a Medical Grade
Compressed air tank?
A. Green
B. Blue
C. Yellow
D. Gray
E. None of the above
51. How much current will flow in
the neutral wire which is the return path of 2 120 volt AC sources that are 180o
out of phase from each other in a purely resistive circuit?
A. The sum of the two source currents.
B. The difference of the two source currents.
C. It cannot be calculated.
D. Only an estimate can be made since the voltage may lead current or
current may lead the voltage depending on inductance and capacitance.
E. None of the above.
52. 23. Draw a 1000:1 resistive current divider.
53. What part is responsible for
RAM checking when an IBM compatible PC computer is turned on.
A. Low Voltage Power Supply
B. RAM
C. ROM
D. BIOS
E. Hard Drive
54. In a Microsoft Windows
environment, when is “SAVE” used and when should “SAVE AS” be used?
A. Save is used to overwrite an existing document. Save As cannot be
used as to overwrite.
B. Save As is used to overwrite an existing document. Save cannot be
used as to overwrite.
C. Save As is used to replace a retrieved document with a different
name and the original document is renamed.
D. Save As is used to replace a retrieved document with a different
name, the original document is not renamed.
E. Save is used to replace a retrieved document with a different name,
the original document is not renamed.
55. What is the difference
between a folder and a file in computer terms.
A. A folder holds files that contain the actual data.
B. A file holds folders that contain the actual data.
C. All files can be run or executed, not all folders can be executed.
D. All folders can be run or executed, not all files can be executed.
E. A and C above.
F. A and D above.
56. What is a “.jpg” file and
when are they used?
A. It is a Jump to Page process used in programming spreadsheets.
B. It is the file extension for a TIFF digital image.
C. During Regeneration of the heart cells
D. It is an unknown file extension.
E. It is a picture file often used on the web.
F. B and E above
G. None of the above
57. Cardioversion takes place
when?
A. During Systole
B. During Diastole
C. During Regeneration of the heart cells
D. It is not time specific
E. A and C above
F. B or C above
G. None of the above
The following questions (58 - 64) are
to be answered in relation to using an ESU analyzer while testing an ESU:
58. How do you know what load setting to use?
A. ESU
outputs are to be delivered into the standard “AAMI Load”
B. ESU
inputs are to be connected to a standard “AAMI Load”
C. There are several thousand different loads
to select from. The manufacture data is required to obtain this information.
D. ESU loads are not important; the output
current will determine functionality of the device.
E. A or D are true answers.
F. None of the above.
59. Describe what these units can typically
measure.
A. Defib outputs, cardioversion time and ECG rates.
B. Temperature and time to reach a set point.
C. Temperature and time to reach a specific tidal volume.
D. RF power, RF leakage currents
E. 60
Cycle leakage current
F. B
and E above
G. None of the
above
60. Draw a schematic of a typical unit.
61. What is chassis RF leakage current.
(Select the best answer)
A. Leakage
from chassis to active.
B. Leakage
from chassis to patient plate.
C. Leakage
from chassis to ground.
D. There
is no such measurement.
E. A,
B and C above.
F. None
of the above.
62. What is Active leakage current?
A. Leakage
from patient to ground during activation.
B. Leakage
from chassis to patient plate.
C. Leakage
from active to patient plate.
D. There
is no such measurement.
E. A,
B and C above.
F. None
of the above.
63. What is “Open Circuit” chassis leakage?
A. Leakage
from chassis to active.
B. Leakage
from chassis to patient plate.
C. Leakage
from chassis to ground with an open 120v ground plug.
D. There
is no such measurement.
E. Leakage
from chassis to ground with an open patient load circuit.
F. None
of the above.
64. What is open circuit “Active” leakage?
A. Leakage
from chassis to active with a broken 120v ground plug.
B. Leakage
from chassis to patient plate.
C. Leakage
from chassis to ground.
D. There
is no such measurement.
E. A,
B and C above.
F. None
of the above.
65. What
is pressure.
66. What
is flow?
67. What
is volume?
68. How much time can pass during
cardioversion after the “R” wave trigger is detected?
A. There is a zero specification of time, discharge is expected
immediately.
B. Typically 40 pico-seconds or less.
C. Typically 40 micro-seconds or less.
D. Typically 40 milli-seconds or less.
E. It is not important since the heart is in fibrillation anyway, most
units fire with in 0.5 seconds.
69. Circle all true points
regarding a kidney dialysis machine:
A. They typically warm the patients blood for processing.
B. They typically add anti-coagulants to the blood.
C. They typically vary the dialysis fluid pressure to add weight to a
patient.
D. They can vary the dialysis fluid pressure to remove weight from a
patient.
E. Patient blood enters the machine where it is mixed with chemically purified
and slightly heated water. Blood that leaves the machine is returned to the
patient.
F. The patients blood and the water are not normally at the same
temperature.
G. Some patients need only a few treatments until their kidney’s start
working again.
70. Which of the answers are true
about ECT.
A. It is no longer used today.
B. Direct Current is used as treatment.
C. Alternating Current is used as treatment.
D. The EEG can not be monitored during the energy delivery phase.
E. The ECG can not be monitored during the energy delivery phase.
F. The patients ECT is sometimes monitored for many hours after the
treatment.
71. Circle the answers that
are correct in regards to monitoring the ECG of a patient. For this example the
patient is not connected to any other device except and ECG monitor and is
lying on a non-conductive litter. The ECG monitor is electrically isolated
according to the standards set forth in NFPA99.
Circle ALL correct answers.
A. The patient will not feel a thing if they accidentally touch a 120
volt A.C. source.
B. The patient will not feel a thing if they accidentally touch a 120
volt A.C. source, but ventricular fibrillation is likely to occur.
C. The patient will not feel a thing if they accidentally touch a 120
volt A.C. source, but they may get an electrode burn over time.
D. A GFCI breaker should “Trip” is it is working properly and the 120
volt source is protected with a GFCI source.
72. What is a typical SAO2 level
for a healthy patient?
A. 50% - 75%
B. 75% - 90%
C. 90% - 100%
D. 120/80 mmHg.
E.
80/120
mmHg.
F.
150/95
mmHg.
73. Neon lamps are sometimes used
on input circuits of biomedical amplifiers to:
A. decrease amplifier electrode offset drift.
B. indicate proper operation.
C. reduce common noise rejection.
D. increase common mode rejection.
E. protect from large input voltages.
F. indicate amplifier saturation.
74. How do NIBP monitors work?
A. A catheter is introduced into the Femoral artery. It is fluid filled
and back pressured. An external transducer which is a wheatstone bridge
converts the pressure into an electrical voltage. This voltage is read by the
monitor and displayed.
B. A catheter is introduced into the Femoral artery. It is fluid filled
but not back pressured. An external transducer which is a wheatstone bridge
converts the pressure into an electrical voltage. This voltage is read by the
monitor and displayed.
C. A is correct but it can be placed in any artery.
D. B is correct but it can be placed in any artery.
E. None of the above.
75. T / F An EP Study is performed to check blood flow to
the arteries of the heart.
76. T / F The Atrioventricular node is the natural
pacemaker of the heart.
77. Which conduction system of the heart wraps
around the ventricles causing them to contract?
A. The
SA node
B. The
AV node
C. The
Bundle of HIS
78. Pumping
of the heart is best described in what sequence?
A. RA,
then LA, then RV followed by the LV
B. RA,
then RV, then LA followed by the LV
C. RV and RA at the same time followed by the LA
and LV at the same time.
D. RA and LA at the same time followed by the RV
and LV at the same time.
79. T / F The pulmonary artery carries de-oxygenated blood to the lungs.
80. An “Ablation” is a term used
to describe the following:
A. Burning a section of the electrical conduction
path in the heart.
B. Opening a clogged or partially clogged
artery.
C. Connecting pacemaker wires to the SA node.
D. Connecting pacemaker wires to the AV node.
81. T / F Left heart catheter studies are performed more often than right
heart studies.
82. An ECG calibration signal is typically
A. 50
Micro-volts
B. 1
Milli-volt
C. 50
Milli-volts
D. 100
Micro-volts
E. 1
Volt
82. An EEG calibration signal is typically
A. 50
Micro-volts
B. 1
Milli-volt
C. 50
Milli-volts
D. 100
Micro-volts
E. 1 Volt
83.
When a signal reaches the end
of a properly terminated transmission line or coax cable, the signal will
A. be
absorbed
B. be
reflected
C. result
in ringing
D. radiate
into the air
E. all of the above
84.
The
typical bandpass of a diagnostic quality ECG circuit is
A. 5 – 40 Hz
B. 0.005 – 100 Hz
C. .05 – 100 Hz
D. 0 – 40 Hz
E. 0 – 100 Hz.
F. Patient dependant
85. T / F Right heart catheterization studies are
performed by pushing a catheter through the septum.
86. T / F Left heart catheterization studies are
performed by pushing a catheter through the septum.
87. T
/ F Typical cardiac
output is between 3 – 5 liters per hour.
88. T / F A broken ground conductor in a medical device
is a safety hazard that typically results in higher than allowable leakage
currents.
89. T
/ F Brain waves can be
measured with needles inserted into the scalp.
90. T
/ F Common mode
rejection ratios should be very low.
91. T
/ F GFCI’s prevent
micro-shock.
92. T
/ F The neutral wire
in a U.S made power cord is usually green.
93. T
/ F The hot wire in a
European power cord is usually black.
94. T
/ F Electrosurgical
units typically operate at 100 mHz.
95. T
/ F Gauge 8 wire can
supply more current than 12 gauge wire.
96. T
/ F An 8 bit binary
code allows 128 logical combinations.
97. T
/ F A WORM drive
cannot be re-written over.
98. T
/ F The gain of an
op-amp is controlled by the feedback circuit.
99. T
/ F An LED will
illuminate when it is forward biased.
100. T
/ F Block diagrams are
used to simplify schematic drawings.