ARRL Vocabulary Development 5

Question 1

What does 'EME' stand for in amateur radio?

Accepted Answer

Earth-Moon-Earth (moonbounce) communication

Answer

EME, or Earth-Moon-Earth, refers to the technique of bouncing radio signals off the Moon to communicate with distant stations.

Question 2

What is the 'phonetic alphabet' and why do hams use it?

Accepted Answer

A standardized set of words used to spell letters clearly over voice

Answer

The phonetic alphabet assigns a standard word (e.g., Alpha, Bravo) to each letter so that letters are not confused during voice communication.

Question 3

What is meant by 'split' operation on HF?

Accepted Answer

Transmitting on one frequency and listening on another

Answer

Split operation means a station transmits on one frequency while listening for replies on a different frequency, commonly used by rare DX stations to manage pileups.

Question 4

What is 'third-party traffic' in amateur radio?

Accepted Answer

Communications on behalf of a person who is not a licensed amateur

Answer

Third-party traffic refers to messages transmitted by an amateur on behalf of a non-amateur (the third party), which is subject to restrictions with certain countries.

Question 5

What is the term for the lowest frequency at which signals are reflected back to Earth by the ionosphere?

Accepted Answer

Critical frequency

Answer

The critical frequency is the highest frequency at which a vertically transmitted signal is reflected by the ionosphere; signals above it pass through into space.

(ARRL) American Radio Relay League Practice Test

(ARRL) American Radio Relay League Practice Test

ARRL Vocabulary Development 5