CPC Navigation Systems & Radar Operations 2

Question 1

Which transponder code must a pilot squawk when experiencing radio communication failure in VMC?

Accepted Answer

7600

Answer

Code 7600 is the internationally designated squawk for radio communication failure (NORDO).

Question 2

What is the primary purpose of Secondary Surveillance Radar (SSR) Mode C?

Accepted Answer

Pressure altitude encoding

Answer

Mode C encodes the aircraft's pressure altitude from the encoding altimeter and transmits it to ATC radar.

Question 3

A controller loses radar identification on an aircraft. What is the FIRST action the controller should take?

Accepted Answer

Advise the pilot and request a squawk ident

Answer

The controller must advise the pilot of the loss of radar identification and request re-identification procedures such as ident or a heading change.

Question 4

In radar operations, what does 'painting' an aircraft target refer to?

Accepted Answer

The radar antenna beam illuminating the aircraft to produce a return

Answer

Painting refers to the primary radar antenna beam striking the aircraft and producing a radar return or blip on the display.

Question 5

What is the maximum distance from an NDB at which a controller can expect reliable ADF reception for en-route operations?

Accepted Answer

75 NM

Answer

En-route NDBs are typically reliable up to approximately 75 NM during daytime hours under normal conditions.

(CPC) Certified Professional Controller Practice Test