CDC 3D156 Volume 1
CDC URE Test
- 1.What AFMAN lists the specific duties of the Airfield Systems technician?
- A.
36-2108
- B.
36-2101
- C.
21-116
- D.
11-225
- 2.How much electric current is of sufficient intensity to prevent voluntary control of muscles?
- A.
15 mA
- B.
14 mA
- C.
12 mA
- D.
10 mA
- 3.What is the minimum amount of electric current needed to be fatal?
- A.
10 mA
- B.
100 mA
- C.
125 mA
- D.
150 amps
- 4.What poisonous substances can eat away flesh on contact?
- A.
Inflammables
- B.
Electrolytes
- C.
Corrosives
- D.
Irritants
- 5.General-purpose detergents (spray and wipe) used in most work centers are
- A.
Corrosive
- B.
Eye irritants
- C.
Skin irritants
- D.
Respiratory irritants
- 6.In addition to the eyes, what organs of the body is/are susceptible to overexposure to radio frequency (RF) radiation?
- A.
Brain
- B.
Kidneys
- C.
Appendages
- D.
Reproductive Organs
- 7.The two categories of hazards that are considered human factors are
- A.
Job related and domestic
- B.
Physical and emotional
- C.
Job related and mental
- D.
Mental and physical
- 8.Being distracted from a task while thinking of personal problems is an example of which type of human hazard factor?
- A.
Emotional
- B.
Domestic
- C.
Physical
- D.
Mental
- 9.The weather-related hazards of climbing are rain, wind and
- A.
Ice
- B.
Cold
- C.
Snow
- D.
Lightning
- 10.While climbing, the hazard posed by bulky clothing is
- A.
Decreased flexibility increasing your chances of slipping
- B.
Getting snagged and losing your balance
- C.
Ripping your clothing
- D.
Heat related stress
- 11.Some of the common elements of a fixed base are fixed
- A.
Navigation systems and a temporary control tower
- B.
Navigation systems, heli-pad, and a permanent control tower
- C.
Navigation systems, weather systems, and a permanent control tower
- D.
Navigation systems, weather systems, passenger service terminal, and a permanent control tower
- 12.At a fixed base, what must always be in the forefront of your mind?
- A.
Maintaining inspection and maintenance records
- B.
Readiness to deploy and support the air and space expeditionary force (AEF) needs
- C.
Supervising airfield systems maintenance activities
- D.
Performing preventive maintenance on airfield systems
- 13.What determines the type of eqiupment used at a deployed base?
- A.
Unit type code (UTC)
- B.
Chief of maintenance
- C.
Mission of the base
- D.
Air Force Manual (AFMAN) 36-2108
- 14.What is the most important part of being an air expeditionary force (AEF) airman?
- A.
Performing only the responsibilities as prescribed in the unit type code (UTC)
- B.
Performing only the tasks of an Airfield Systems Technician
- C.
Being flexible and able to adapt to your surroundings
- D.
Being flexible and maintaining good health
- 15.When the modulating signal and carrier signal are combined within a modulator, the output signal contains
- A.
Modulating signal, upper sideband, and lower sideband
- B.
Carrier, upper sideband, and lower sideband
- C.
Upper sideband and modulating signal
- D.
Carrier and modulating signal
- 16.If a carrier frequency of 1 megahertz (MHz) and a modulating tone of 10 kilohertz (kHz) goes to the modulator, the output signal include
- A.
1.01 MHz, 1 MHz, and 0.99 MHz
- B.
1.1 MHz, 1 MHz, 0.9 MHz
- C.
1.11 MHz, 1 MHz, 0.99 MHz
- D.
1.111 MHZ, 1 MHz, 0.999 MHz
- 17.The bandwidth of an amplitude modulation signal refers to the amount of
- A.
Data that can be carried from one point to another in a given period of time
- B.
Frequency deviation divided by the frequency of the modulating signal
- C.
Change in the carrier frequency as a result of the modulation process
- D.
Space the transmitted signal will occupy in the frequency spectrum
- 18.If an oscilloscope displays a modulation envelope having Emax of 200 volts and an Emin of 20 volts, what is the modulation percentage?
- A.
81.8
- B.
85.5
- C.
88
- D.
122
- 19.Which statement concerning bandwidth is true?
- A.
Overmodulating increases bandwidth due to the production of harmonics
- B.
Undermodulating increases bandwidth due to the production of harmonics
- C.
Overmodulating increases bandwidth due to the output's increased amplitude
- D.
Undermodulating increases bandwidth due to the output's decreased amplitude
- 20.Reducing modulation to less than 100 percent gives
- A.
More total power
- B.
A reduction in carrier power
- C.
No reduction in carrier power
- D.
A reduction in carrier and sideband power
- 21.The output of the oscillator in a frequency modulation (FM) modulator increases in frequency with each
- A.
Positive half cycle of the carrier
- B.
Negative half cycle of the carrier
- C.
Positive half cycle of the modulating signal
- D.
Negative half cycle of the modulating signal
- 22.In frequency modulation (FM), the amount of the oscillator frequency change is
- A.
Inversely proportional to the amplitude of the modulating signal
- B.
Directly proportional to the amplitude of the modulating signal
- C.
Inversely proportional to the phase of the modulating signal
- D.
Directly proportional to the phase of the modulating signal
- 23.In frequency modulation, sidebands are considered significant when containing at least what percent of total transmitted power?
- A.
1
- B.
3
- C.
10
- D.
12
- 24.What is the formula to finf the modulating index?
- A.
Deviation divided by frequency of modulation
- B.
Deviation times frequency of modulation
- C.
Sideband divided by carrier frequency
- D.
Sideband times carrier frequency
- 25.A 5 kilohertz (kHz) modulating signal has enough peak voltage to cause a deviation of 15 kHz. What is the modulation index?
- A.
5
- B.
0.5
- C.
0.3
- D.
3
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