CDC 2EX5X Communications-electronics Journeyman Part 2
Contiuation of 2EX5X Pretest Part 1.
- 1.
What are the two sampling techniques of a digital storage oscilloscope?
- A.
Real-time and repetitive sampling
- B.
Real-time and averaging sampling
- C.
Repetitive and averaging sampling
- D.
Linear and averaging sampling
Correct Answer
A. Real-time and repetitive sampling -
- 2.
What are the two types of intepolation?
- A.
Real-time and linear
- B.
Real-time and sine
- C.
Sine and Linear
- D.
Sine and Repetitive
Correct Answer
C. Sine and Linear -
- 3.
Which is not a type of acquisition mode on the digital storage oscilloscope?
- A.
Sample Mode
- B.
Repetitive Mode
- C.
Peak Detection Mode
- D.
Averaging Mode
Correct Answer
B. Repetitive Mode -
- 4.
What is teh frequency range of an audio signal generator?
- A.
10Hz to 10kHz
- B.
20Hz to 20kHz
- C.
10kHz to 10GHz
- D.
20kHz to 35MHz
Correct Answer
B. 20Hz to 20kHz -
- 5.
Which one of these is not an application of a radio frequency generator?
- A.
Verifying transmitter frequencies
- B.
Troubleshooting receivers
- C.
Checking antenna systems
- D.
Aligning galvanometers
Correct Answer
D. Aligning galvanometers -
- 6.
A radio frequency generator is used to
- A.
Monitor odd harmonics
- B.
Align telemetry receivers
- C.
Modulate subcarrier oscillators
- D.
Check galvanometer frequency response
Correct Answer
B. Align telemetry receivers -
- 7.
What is the variable voltage range of signals output from the HP 3325B synthesizer/function generator?
- A.
1 mV to 10 V peak-to-peak
- B.
1 mV to 10V peak
- C.
1 V to 10V peak-to-peak
- D.
1V to 10V peak
Correct Answer
A. 1 mV to 10 V peak-to-peak -
- 8.
The output of the HP 3325B function generator may generate only DC voltages, to a maximum of
- A.
+/- 1V
- B.
+/- 4.5V
- C.
+/- 5V
- D.
+/- 10V
Correct Answer
C. +/- 5V -
- 9.
In using the phase modulation controls of the HP3325B function generator, an input of a +/- 5 V peak would result in what approximate phase deviation?
- A.
+/- 42.5 degrees per volt for sine wave
- B.
+/- 42.5 degrees per volt for square wave
- C.
+/- 425 degrees per volt for sine wave
- D.
+/- 425 degrees per volt for square wave
Correct Answer
D. +/- 425 degrees per volt for square wave -
- 10.
The 10:1 power ratio represented by 1 bel can also be represented by how many decibels (db)?
- A.
1 dB
- B.
3dB
- C.
6 dB
- D.
10 dB
Correct Answer
D. 10 dB -
- 11.
A power reading that uses the abbreviation dBm indicates the
- A.
Ratio of decibels relative to a 1-milliwatt standard
- B.
Ratio of decibels relative to a 1-megawatt standard
- C.
Actual power level expressed in milliwatts
- D.
Actual power level expressed in megawatts
Correct Answer
A. Ratio of decibels relative to a 1-milliwatt standard -
- 12.
The measurable frequency and power ranges of the HP 436A power meter are determined by the
- A.
Digital display
- B.
Power sensor
- C.
Power meter
- D.
Interface
Correct Answer
B. Power sensor -
- 13.
During what operation is the radio frequency blanking output used on the HP 436A power meter?
- A.
While in WATT mode operation
- B.
While in REMOTE mode operation
- C.
During the automatice zeroing operation
- D.
During calibration adjustment operation
Correct Answer
C. During the automatice zeroing operation -
- 14.
Which measurements is not made with a spectrum analyzer?
- A.
Frequency stability
- B.
Peak-peak voltage
- C.
Amplitude modulation
- D.
Subcarrier oscillator output
Correct Answer
B. Peak-peak voltage -
- 15.
Which measurements do you make with a spectrum analyzer?
- A.
Subcarrier oscillator outputs
- B.
Transducer output voltage
- C.
Time between two events
- D.
Pulse width
Correct Answer
A. Subcarrier oscillator outputs -
- 16.
Which electronic counter measurement do you make with a spectrum analyzer?
- A.
Period
- B.
Scaling
- C.
Frequency
- D.
Time interval
Correct Answer
A. Period -
- 17.
Which electronic counter measurement counts the number of bits in a pulse train?
- A.
Period
- B.
Scaling
- C.
Totalize
- D.
Time interval
Correct Answer
C. Totalize -
- 18.
Which are the correct four classes of electronic counters?
- A.
Frequency counters, time counters, microwave counters, and reciprocal counters
- B.
Frequency counters, universal counters, microwave counters, and reciprocal counters
- C.
Frequency counters, universal counters, period counters, and reciprocal counters
- D.
Scaling counters, universal counters, microwave counters, and reciprocal counters
Correct Answer
B. Frequency counters, universal counters, microwave counters, and reciprocal counters -
- 19.
What principle does the time domain reflectometer use to test cables?
- A.
-
- 20.
Which push-button(s) would you select to get 125 ohm impedance on the time domain reflectometer?
- A.
None
- B.
75 ohm only
- C.
125 ohm only
- D.
50 ohm and 75 ohm
Correct Answer
D. 50 ohm and 75 ohm -
- 21.
What tye of deflection return on the TDR CRT would indicate a cable "short?'
- A.
No "pip"
- B.
Smear "pip"
- C.
Upward deflections "pip"
- D.
Downward deflections "pip"
Correct Answer
D. Downward deflections "pip" -
- 22.
While using a time domain reflectometer (TDR), what cable fault causes delays in pulses of propagation velocity making accurate measurements difficult?
- A.
Short
- B.
Open
- C.
Grounded
- D.
Moisture in cables
Correct Answer
D. Moisture in cables -
- 23.
What do we call the power that is reflected back to an optical source in the time domain reflectometer?
- A.
Reflection
- B.
Backscatter
- C.
Scatter coefficient
- D.
Reflection coefficient
Correct Answer
B. Backscatter -
- 24.
How is the signal loss represented in an optical time domain reflectometer display?
- A.
Watts
- B.
Power
- C.
Candles
- D.
Decibels
Correct Answer
D. Decibels -
- 25.
What range of frequencies does the radio frequency signal generator provide?
- A.
10Hz to 10 MHz
- B.
10kHz to 10Mz
- C.
10Hz to 10GHz
- D.
10kHz to 10GHz
Correct Answer
D. 10kHz to 10GHz -
- 26.
With the signal generator, what do you use to match impedance of a ciruit under test?
- A.
Balun
- B.
N-type connector
- C.
Attenuator
- D.
BNC connector
Correct Answer
C. Attenuator -
- 27.
What element of a resistance-capacitance oscillator in a commercial signal generator is used as a variable element?
- A.
Induction
- B.
Capacitance
- C.
Sampling
- D.
Power
Correct Answer
B. Capacitance -
- 28.
What is the frequency range of range of the HP 8640B radio frequency signal generator?
- A.
500kHz to 512MHz
- B.
512HZ to 500kHz
- C.
500Hz to 512kHz
- D.
512kHz to 500MHz
Correct Answer
A. 500kHz to 512MHz -
- 29.
What types of modulated signals are possible with the radio frequency generator?
- A.
Sine Wave
- B.
Square wave
- C.
Triangle +/- Ramps
- D.
All of the Above
Correct Answer
D. All of the Above -
- 30.
What is the output impedance available at the HP 3325B's front and rear panel output jacks?
- A.
25 ohms
- B.
50 ohms
- C.
100 ohms
- D.
150 ohms
Correct Answer
B. 50 ohms -
- 31.
What internally generated modulating signals can the HP 3325B use to amplitude-modulate the main signal?
- A.
2kHz square wave and10kHz triangle wave
- B.
2kHz sine wave and 10kHz traingle wave
- C.
2kHz triangle and 10kHz square wave
- D.
2kHz square wave and 10kHz sine wave
Correct Answer
D. 2kHz square wave and 10kHz sine wave -
- 32.
A power ratio of 10000:1 can be represented by how many bels?
- A.
1 bels
- B.
2 bels
- C.
3 bels
- D.
4 bels
Correct Answer
D. 4 bels -
- 33.
What's the most commonly used industry standard power reference level?
- A.
1 microwatt
- B.
1 milliwatt
- C.
10 microwatt
- D.
10 milliwatt
Correct Answer
B. 1 milliwatt -
- 34.
What does every 3 dB increase in gain do to the power level?
- A.
Nothing
- B.
Doubles power
- C.
Reduces power by 1/4
- D.
Cuts power in half
Correct Answer
B. Doubles power -
- 35.
How much more power is available at 6dBm than at 3 dBm?
- A.
None
- B.
1/2 less power
- C.
Twice as much
- D.
4 times as much
Correct Answer
C. Twice as much -
- 36.
Which feature of the HP436A is ideal for monitorying peaking power?
- A.
Auxiliary meter
- B.
Power Sensor
- C.
Autorange
- D.
Auto zero
Correct Answer
A. Auxiliary meter -
- 37.
Which feature of the HP 436A determines power measurement range and frequency range?
- A.
Auxiliary meter
- B.
Power sensor
- C.
Autorange
- D.
Auto zero
Correct Answer
B. Power sensor -
- 38.
Which feature of the HP 436A provides hands free operation?
- A.
Auxiliary meter
- B.
Power sensor
- C.
Autorange
- D.
Auto zero
Correct Answer
C. Autorange -
- 39.
Which feature of the HP 436A can be used to stabilize the power source?
- A.
Autorange
- B.
Auto zero
- C.
Recorder output
- D.
Interface connector
Correct Answer
C. Recorder output -
- 40.
Which feature of the 436A provides a stable 1.00mW, 50 MHz output
- A.
Recorder output
- B.
Interface connector
- C.
Calibrator output
- D.
Radio frequency blanking output
Correct Answer
C. Calibrator output -
- 41.
Which feature of the HP 436A is for receiving commands from a computer?
- A.
Recorder output
- B.
Interface connector
- C.
Calibrator output
- D.
Radio frequency blanking output
Correct Answer
B. Interface connector -
- 42.
Which feature of the HP 436A can be used to print graphs?
- A.
Autorange
- B.
Auto zero
- C.
Recorder output
- D.
Interface connector
Correct Answer
C. Recorder output -
- 43.
Why is it important to mark underground facilities, when the earth's surface is moved, removed, or displaced?
- A.
To minimize damage
- B.
To have a uniform color code
- C.
To maximize conservation of resources
- D.
To enforce American Public Works Association guidelines
Correct Answer
A. To minimize damage -
- 44.
What guideline is encouragedby APWA to adopt to mark underground facilities?
- A.
Transient Electromagnetic Pulse Emanation Standard
- B.
Utility and Public Right-of-Way
- C.
Underwriters Laboratories
- D.
Information Assurance
Correct Answer
B. Utility and Public Right-of-Way -
- 45.
What color is used to mark sewer and drain lines?
- A.
Blue
- B.
White
- C.
Green
- D.
Purple
Correct Answer
C. Green -
- 46.
What color is used to mark the route of proposed subsurface line or location of proposed excavation?
- A.
Blue
- B.
White
- C.
Green
- D.
Purple
Correct Answer
B. White -
- 47.
What color is used to mark electric power lines, cables, and conduit systems and lighting cables?
- A.
Red
- B.
Yellow
- C.
Orange
- D.
Blue
Correct Answer
A. Red -
- 48.
What color is used to mark water, irrigation and slurry lines?
- A.
Red
- B.
Yellow
- C.
Orange
- D.
Blue
Correct Answer
D. Blue -
- 49.
What color is used to mark gas, oil, steam, petroleum, gaseous, or dangerous materials?
- A.
Red
- B.
Yellow
- C.
Orange
- D.
Blue
Correct Answer
B. Yellow -
- 50.
What color is used to mark temporary construction project site survey markings or to make surve monumnts temporarily more visible?
- A.
Green
- B.
White
- C.
Purple
- D.
Flourescent pink
Correct Answer
D. Flourescent pink -
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Mar 16, 2022Quiz Edited by
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