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LESSON 2

PRACTICE EXERCISE

ANSWER KEY

1. What are the two major areas of preventive ECCM?

A. Direction finding and electronic surveillance
B. Direction finding and operational techniques
C. Electronic surveillance and systems design
D. Operational techniques and systems design
2. What are friendly actions taken in response to enemy jamming?

A. Cryptographic security
B. ECM
C. Remedial ECCM
D. SIGSEC
3. Site selection and radiated power are two of the most important considerations in radio system installation. What is the other consideration?

A. Antenna compatibility
B. Antenna selection
C. Availability of radios
D. Site defendability
4. Prosigns are normally used with which of the following?

A. Encrypted communications
B. Multichannel communications
C. Radiotelegraph
D. Radiotelephone
5. Which of the following is not an example of proper radio operator procedure?

A. Encrypt all EEFI
B. Operate on fixed schedules
C. Reduce distinguishable operator procedures
D. Use authentication
6. Which type of modulated jamming involves broadcasting synchronization tones over the operating frequency of a radio net that uses voice security devices?

A. Preamble jamming
B. Random pulse
C. Recorded sounds
D. Stepped tones

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