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2012-2016 Extra Pool

Errata - January 31, 2012 to the December 13, 2011
Release of the 2012-2016 Extra Class Question Pool

REVISED Pool Files for download:

January 31,2012 REVISED 2012-2016 Extra Class Pool.doc

2012-2016 Extra Class Diagrams.pdf

E1A06 – Corrected wording of question and distractor B to: Which of the following describes the rules for operation on the 60 meter band?
A. Working DX is not permitted
B. Operation is restricted to specific emission types and specific channels
C. Operation is restricted to LSB
D. All of these choices are correct

- Correction in the question: Changed "Mhz" to "MHz"

- Correction of missing wording in distractor D: Minimum passing score of 77%

– Deleted question

- Changed wording of question and distractors to:
Which of the following data are used by the APRS network to communicate your location?
A. Polar coordinates
B. Time and frequency
C. Radio direction finding LOPs
D. Latitude and longitude

– Changed wording of distractor C: New wording; C. CW signals appear to be modulated by white noise

- Change wording of question: By how much does the VHF/UHF radio-path horizon distance exceed the geometric horizon?

- Correction in the question: "it's" to "its"

- Changed distractor D: to Ground wave

- Correction of the word feedline to feed line in distractors 

- Changed wording of distractor A: . The difference in dB between the noise floor and the level of an incoming signal which will cause 1 dB of gain compression

- Correction to answers A and B: Removed extra spaces in values

- Correctly renumbered question to E5D16

– Correction in wording of question:How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500 VA?

- Changed wording in question to "grounded-base": hyphenated

- Correction of missing word in distractor B: A display using a crystalline liquid which, in conjunction with polarizing filters, becomes opaque when voltage is applied

- Change wording of question to: Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

- Removed the “?” at end of distractor A

- Changed wording in distractor C:. By feeding a 180-degree out-of-phase portion of the output back to the input

- Changed “pi”-L to Pi-L in question and to Pi in distractor B

- Correction in wording of question: capitalization changes in distractors A, B and C: What is one advantage of a Pi matching network over an L matching network consisting of a single inductor and a single capacitor?
A. The Q of Pi networks can be varied depending on the component values chosen
B. L networks can not perform impedance transformation
C. Pi networks have fewer components
D. Pi networks are designed for balanced input and output

- Change wording of distractor C to: The differential input voltage needed to bring the open-loop output voltage to zero

- Correction of hyphenated word feed-line in C: changed to feed line. Removed quotations in distractor D: "flat-topping"

E9 Syllabus title
- Corrected to : ANTENNAS AND TRANSMISSION LINES in both syllabus outline and E9 section of pool

- Correction of hyphenated word feed-point in C: changed to feed point

- Changed wording of question: What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point?

- Correction of typo in D: "constant" should not be capitalized

E9E09, E9E10, E9E11, E9E12
- Corrections of hyphenated feed-line and conjoined use of feedline; changed all instances to “feed line” in questions and/or answers

- removed quotations around words "phasing line" in question
~~~ end of errata~~~

Roland Anders, K3RA - LAUREL VEC
Chairman of NCVEC Question Pool Committee

Members of the Committee
Perry Green, WY1O - ARRL VEC
Michael Maston, N6OPH - SANDARC-VEC
Larry Pollock, NB5X - W5YI VEC
Jim Wiley - KL7CC - Anchorage VEC

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