CPL Navigation and Radio Aids 2

Question 1

What does a VOR receiver indicate when the aircraft is directly over the station in the cone of silence?

Accepted Answer

The TO/FROM indicator fluctuates and the CDI swings erratically

Answer

In the cone of silence directly overhead a VOR, the weak signal causes the TO/FROM flag to fluctuate and the CDI to swing erratically.

Question 2

DME slant range error is most significant when the aircraft is:

Accepted Answer

At high altitude and close to the station

Answer

At high altitude and close to the station, the aircraft's vertical distance represents a large fraction of the slant range, making the error between slant range and ground distance greatest.

Question 3

While flying outbound on the 180° radial (OBS 180°, FROM indication), the CDI deflects to the left. To intercept the 180° radial, the pilot should turn:

Accepted Answer

Left

Answer

With a FROM indication and normal (outbound) sensing, the CDI deflects toward the course; the pilot turns left toward the needle to intercept.

Question 4

The FAA-permitted tolerance for an airborne VOR receiver check over a designated checkpoint is:

Accepted Answer

±4°

Answer

FAR 91.171 requires VOR airborne receiver check accuracy to be within ±4° of the published radial for the designated checkpoint.

Question 5

While flying a constant heading, an aircraft crosses the 350° radial then the 020° radial of a VOR in 2 minutes. Approximately how many minutes away is the station?

Accepted Answer

4 minutes

Answer

Time to station = (minutes elapsed × 60) ÷ degrees of bearing change = (2 × 60) ÷ 30 = 4 minutes.

(CPL) Commercial Pilot Licence Practice Test

(CPL) Commercial Pilot Licence Practice Test

CPL Navigation and Radio Aids 2