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3d1x3 CDC Volume 1 Ure

100 Questions  I  By Ihatecdc
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1.  (007)  What error-correction technique sends a retransmittal request by the receiver to the sender if it finds an error in a received frame?
A.
B.
C.
D.
2.  (024)  A known current is generated by the earth ground tester between the earth ground electrode and the
A.
B.
C.
D.
3.  (014)  If the interference can be eliminated by disconnecting the receiving antenna, the source of the disturbance is most likely
A.
B.
C.
D.
4.  (001)  What are the three general categories used to produce modulation in radio frequency (RF) transmission today?
A.
B.
C.
D.
5.  (020)  In real-time sampling, what type of interpolation is used when measuring pulse waves?
A.
B.
C.
D.
6.  (002)  Which statement concerning bandwidth is true?
A.
B.
C.
D.
7.  (015)  At what level does the Air Force want electromagnetic interference (EMI) problems resolved?
A.
B.
C.
D.
8.  (002)  If the modulating audio signal is 10kHz wide, what is the bandwidth of the transmitted amplitude modulated signal?
A.
B.
C.
D.
9.  (003)  In frequency modulation (FM), the amount of oscillator frequency change is
A.
B.
C.
D.
10.  (014)  What is an example of intentionally induced electromagnetic interference (EMI)?
A.
B.
C.
D.
11.  (004)  What is the advantage of adding more phase shifts?
A.
B.
C.
D.
12.  (015)  What Air Force program is used to resolve an electromagnetic interference (EMI) incident?
A.
B.
C.
D.
13.  (014)  What type of equipment often generates many spurious emissions?
A.
B.
C.
D.
14.  (024)  The Institute of Electrical and Electronics Engineers (IEEE) have recommended a ground resistance value of
A.
B.
C.
D.
15.  (014)  How can you normally eliminate electromagnetic interference (EMI) noise bursts caused by sodium and mercurt vapor lights that have stopped working while the power is still applied?
A.
B.
C.
D.
16.  (009)  A device that accepts optical signals from an optical fiber and converts them into electrical signals is called an optical
A.
B.
C.
D.
17.  (020)  Which are the three types of digital storage oscilloscope acquisition modes, and which is the standard operating mode?
A.
B.
C.
D.
18.  (005)  What part of the pulse code modulation (PCM) process converts a continuous time signal into a discrete time signal?
A.
B.
C.
D.
19.  (020)  What area of a digital storage oscilloscope takes digitized samples and performs numberous manipulations on the data including measuring rise and fall times, periods, time intervals, and math computations?
A.
B.
C.
D.
20.  (002)  If a carrier frequency of 1 MHz and a modulating tone of 10 kHz goes to the modulator, the output signal includes
A.
B.
C.
D.
21.  (020)  Sampled data points are stored in the memory of a digital storage oscilloscope as
A.
B.
C.
D.
22.  (027)  A power reading that uses the abbreviation dBm indicates the
A.
B.
C.
D.
23.  (002)  Reducing modulation to less than 100 percent gives
A.
B.
C.
D.
24.  (017)  Which current range on the Fluke 8025A do you select to measure 250 milliamps alternating current (AC)?
A.
B.
C.
D.
25.  (029)  When reading forward power on a wattmeter, what does two right facing arrow head mean?
A.
B.
C.
D.
26.  (008)  Light sources that are applicable to fiber optic waveguide are light-emitting diodes (LED) and
A.
B.
C.
D.
27.  (014)  What type of electromagnetic interference (EMI) occurs when a receiver responds to off-frequency signals?
A.
B.
C.
D.
28.  (015)  What do you do when you are reasonably sure electromagnetic interference (EMI) exists?
A.
B.
C.
D.
29.  (025)  What protocol analyzer test window provides information concerning the network utilization and frame error that are related to a specific protocol?
A.
B.
C.
D.
30.  (008)  What type of light is emitted from a laser?
A.
B.
C.
D.
31.  (020)  What type of sampling does a digital storage oscilloscope normally use on single-shot or seldom-occurring signals?
A.
B.
C.
D.
32.  (007)  When using forward error control as a method of error correction, where does error correction take place?
A.
B.
C.
D.
33.  (018)  How are voltage, time, and depth represented on the oscilloscope display?
A.
B.
C.
D.
34.  (012)  High-altitude electromagnetic pulse is what type of frequency phenomenon, and involces which frequency range?
A.
B.
C.
D.
35.  (026)  Which one of these is not an application of a radio frequency (RF) generator?
A.
B.
C.
D.
36.  (017)  When testing a diode with the 8025A, the leads across a "good" diode produces an "OL" (open) on the display in one direction while reversing the leads produces
A.
B.
C.
D.
37.  (024)  Where is voltage potential measured in the fall of potential ground testing method?
A.
B.
C.
D.
38.  (009)  Small current that flows from a photodiode even with no light is called
A.
B.
C.
D.
39.  (033)  What operational capability of the communication service monitor produces sine, square, and triangle waveforms?
A.
B.
C.
D.
40.  (007)  When using vertical redundancy check (VRC), what significance does the amount of ones have in a data bit pattern?
A.
B.
C.
D.
41.  (012)  Which distinct region of the source region electromagnetic pulse is produced by the interactions between the weapon products and the earth's atmosphere?
A.
B.
C.
D.
42.  (010)  Which repeater amplifies optical signal without converting to and from the electrical domain?
A.
B.
C.
D.
43.  (029)  What feature is useful for making adjustments to optimize any of the parameters which the wattmeter measures?
A.
B.
C.
D.
44.  (023)  System grounds must continually be tested
A.
B.
C.
D.
45.  (012)  A system-generated electromagnetic pulse is a problem for satellites and reentry vehicles that are
A.
B.
C.
D.
46.  (018)  Which mode of triggering an oscilloscope causes a trace to be drawn on the screen at all times, whether there is an input signal or not?
A.
B.
C.
D.
47.  (007)  What error detection method adds stacked characters, divides it by 255, and disregards the answer except for the remainder?
A.
B.
C.
D.
48.  (029)  The two switches on the front panel of the wattmeter is to correstpond to the
A.
B.
C.
D.
49.  (025)  What component on a protocol analyzer process the frames based on the selected test and user configuration inputs?
A.
B.
C.
D.
50.  (003)  In frequency modulation (FM), what is considered a significant sideband?
A.
B.
C.
D.
51.  (016)  Which feature of the Fluke 8025A locks the measurement into the display for viewing and automatically updates the display when you take a new measurement?
A.
B.
C.
D.
52.  (006)  If an error should occur, what data transmission is lost in a synchronous transmission?
A.
B.
C.
D.
53.  (007)  What two error detection methods, when used together, are 98 perfent effective in detecting errors?
A.
B.
C.
D.
54.  (004)  In phase modulation (PM), the carrier's
A.
B.
C.
D.
55.  (021)  What pattern simulator section of the bit error rate test set converts the non-return zero-level (NRZ-L) data into the desired coding, such as non-return zero-mark (NRZ-M)?
A.
B.
C.
D.
56.  (002)  The bandwidth of an amplitude modulated signal is
A.
B.
C.
D.
57.  (015)  What program addresses persistent and recurring interferences problems in joint operations?
A.
B.
C.
D.
58.  (020)  What digital storage oscilloscope circuit compensates for high sampling rates of high frequency signals?
A.
B.
C.
D.
59.  (021)  What test equipment provides a bit error detection system that can determine the received data quality after traveling over a communications link?
A.
B.
C.
D.
60.  (008)  What does an optical source do?
A.
B.
C.
D.
61.  (019)  Which probe does not need to actually make contact with the circuit under test?
A.
B.
C.
D.
62.  (002)  When the modulating signal and carrier signal are combined within a modulator, the output signal contains a/an
A.
B.
C.
D.
63.  (032)  What function is not part of the communication service monitor?
A.
B.
C.
D.
64.  (003)  What is the formula to find the modulating index?
A.
B.
C.
D.
65.  (009)  The responsivity of a photo detector is dependent on the
A.
B.
C.
D.
66.  (013)  Which types of filters are always used in combination with surge arresters?
A.
B.
C.
D.
67.  (012)  How does scintillation effect communications?
A.
B.
C.
D.
68.  (031)  Which are the correct four classes of electronic counters?
A.
B.
C.
D.
69.  (005)  What is the first step in the pulse code modulation (PCM) process?
A.
B.
C.
D.
70.  (021)  What pattern simulator section of the bit error rate test set accepts a 480bit parallel word and generates a serial pattern?
A.
B.
C.
D.
71.  (015)  Who is initially responsible for reporting an electromagnetic interference (EMI)?
A.
B.
C.
D.
72.  (013)  Which one of the following statements are true converning shielding?
A.
B.
C.
D.
73.  (015)  Which Air Force service provides on-site direction finding and interference problem analysis?
A.
B.
C.
D.
74.  (025)  What protocol analyzer test window reports errors that occur at the physical layer such as bad frame check sequence (FCS), short frames, and jabbers?
A.
B.
C.
D.
75.  (013)  What is the purpose of bonding?
A.
B.
C.
D.
76.  (008)  Laser diode power coupling is measured in which range
A.
B.
C.
D.
77.  (012)  What initial nuclear radiation elements generate electromagnetic pulses?
A.
B.
C.
D.
78.  (005)  A type of pulse modulation (PM) that changes the amplitude of the pulse train to vary according to the amplitude of the input signal is called
A.
B.
C.
D.
79.  (001)  What reason for modulation involves modulating low frequency signals for transmission over long distances?
A.
B.
C.
D.
80.  (012)  What electromagnetic pulse region is the principal threat to electronic systems by cable?
A.
B.
C.
D.
81.  (020)  In acquiring a 4K record length on a digital storage oscilloscope, how many samples can you view at one time?
A.
B.
C.
D.
82.  (030)  Which measurements are not made with a spectrum analyzer?
A.
B.
C.
D.
83.  (029)  Plug-in elements of the wattmeter are selected based on the
A.
B.
C.
D.
84.  (022)  On the bit error rate test (BER) set, the 25-pin connector are designed to operate with data modems to
A.
B.
C.
D.
85.  (015)  What is the first step in the Air Force spectrum interference resolution (SIR) program?
A.
B.
C.
D.
86.  (010)  What is used to extend the distance of a fiber optic communication systems link?
A.
B.
C.
D.
87.  (011)  Short sections of single fiber cables that has a connector at each end is called a
A.
B.
C.
D.
88.  (015)  Who is tasked to provide interference resolution support to the unified commanders?
A.
B.
C.
D.
89.  (028)  During what operation is the radio frequency blanking output used on the HP 436A power meter?
A.
B.
C.
D.
90.  (011)  Which fiber optic connector uses a push-pull engagement for mating?
A.
B.
C.
D.
91.  (011)  Which fiber-optic connector uses a quick-release, keyed bayonet couplings that are preferred in situations where severe vibrations are not expected?
A.
B.
C.
D.
92.  (014)  What man-made noise results from voltage surges, arcing, or corona discharges?
A.
B.
C.
D.
93.  (025)  What active test is selected to see the path that the packets are traveling and the time it takes the packets to compete the trip?
A.
B.
C.
D.
94.  (032)  What test equipment combines the operations of many test instruments in a single compact unit?
A.
B.
C.
D.
95.  (022)  Which of these bit rates do you use for a bit error rate test on a 64 Kbps data circuit?
A.
B.
C.
D.
96.  (012)  Atmospheric disturbances from initial nuclear radiation on higher frequencies affect comunications by which types of effects?
A.
B.
C.
D.
97.  (021)  What pattern synchronizer and error counter section of the bit error rate test set internally generates its own pattern to compare with the received data from the data/clock receivers?
A.
B.
C.
D.
98.  (009)  What photo detector converts one photon to one electron?
A.
B.
C.
D.
99.  (002)  The amount of effect or change that the intelligence has on the carrier in an amplitude modulated signal is expressed as the
A.
B.
C.
D.
100.  (009)  What are the two main types of photodetectors?
A.
B.
C.
D.
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