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Saturday 22nd November 2008
Brainteasers
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Brainteasers Interactive Quiz #3:
Transponders

How well do you know the rules and requirements for transponders? A number of these rules have changed in recent years...have you kept up? Take a stab at answering these questions from the November 1995 issue of IFR.

by Paul Bertorelli

The questions in this Brainteaser quiz are based on FAR 91.215 and 91.413, as well as relevant portions of the AIM.

Answer the questions as best you can, then click on the "score" button to see your score and read the explanations. If you don't like your score the first time around, you can change some of your answers and resubmit. To get the most out of this quiz, we suggest you keep trying until you get a perfect score.

1. In which of the following airspace types is a Mode-C transponder not required?
a. Class A
b. Class B
c. Class C
d. Class E
e. None of the above
f. Answer (d) with qualifications.
2. What is the floor of transponder-required Class E airspace?
a. There is no floor.
b. 18,000 feet MSL
c. 10,000 feet MSL
d. 12,500 feet AGL
3. With reference to question #2 above, the exception to the transponder-required rule is which of these values?
a. 2,500 feet AGL
b. 2,500 feet MSL
c. 10,000 feet MSL
d. 1,200 feet AGL
4. You're on an IFR flight, heading for the Miami Class B airspace. Forty miles from your destination, the Center controller informs you that your transponder is inoperative. What are your options?
a. Land as soon as practical.
b. Continue, ask the controller for a transponder waiver.
c. Hold for at least one hour after asking for a transponder waiver, then proceed as planned.
5. When you fly from one ATC sector to another, you're given a new altimeter setting. If you enter this setting incorrectly, your Mode-C altitude readout on the controller's scope will be inaccurate.
a. True
b. False
6. The Mode-C veil around airports upon which Class B airspace is based has which of these vertical dimensions?
a. Surface to top of charted Class B area
b. From 700 feet AGL to 10,000 feet MSL
c. Surface to 12,500 feet MSL
d. Surface to 10,000 feet MSL
7. The 24-month requirement for a transponder check applies only to IFR operations. For VFR, it's not required.
a. True
b. False
8. When a transponder undergoes its periodic check, it must transmit a corrected altitude within how many feet of the altitude shown on the aircraft altimeter?
a. 300 feet
b. 125 feet
c. 500 feet
d. No specific requirement