IFR Navaids - VORs

What phase difference between the reference and variable phase signal is measured by a VOR receiver on a bearing of 240 degrees true where variation is 23 degrees east?

• 258

• 138

• 222

• 217

You are tracking inbound on the 110 radial with wind from the South, you estimate drift to be 6 degrees. What would your heading be when established on the 110 radial?

• 126

• 284

• 114

• 294

With reference to a VOR, the cone of confusion is:

• The area outside the DOC

• The change over from TO to FROM when the OBS is set 90° to the radial

• The area in which more than one VOR can be received on the same frequency

• The area directly overhead a VOR

An aircraft on a heading of 270° (M) has 093 set on the OBS and TO indicated on the VOR L/R deviation indicator. The needle shows two dots fly right. The aircraft is on the:

• 277 radial

• 089 radial

• 097 radial

• 269 radial

The basic principle of operation of the VOR is by:

• Pulse difference between a 30 Hz reference signal and a 30 Hz variable signal

• Phase comparison between a 63 Hz reference signal and a 63 Hz variable signal

• Phase comparison between a 30 Hz reference signal and a 30 Hz variable signal

• Phase comparison between a 30 Hz reference signal and a 63 Hz variable signal

At the time of the observation, the aircraft was on the:

• 156 radial

• 336 radial

• 348 radial

• 168 radial

An aircraft is on a bearing of 091° (M) from a VOR station. If the OBS is set to 263, the deviation indicator will show:

• FROM and fly right 4 dots

• FROM and fly left 4 dots

• TO and fly left 4 dots

• TO and fly right 4 dots

You are flying an aircraft on a heading of 090° (M) and on a bearing of 280° (M) from a VOR. The bearing you should select on the omni-bearing selector in order to centralise the deviation needle with TO showing is:

• 300 degrees

• 270 degrees

• 100 degrees

• 90 degrees

At the time of the observation the aircraft was on the:

• 159 radial

• 175 radial

• 339 radial

• 355 radial

An aircraft is tracking inbound towards VOR station “X” maintaining the 045° radial, drift is 6°Port. NDB “Y” bears 250° relative. The RMI would indicate:

• VOR 225 degrees NDB 121 degrees

• VOR 225 degrees NDB 109 degrees

• VOR 045 degrees NDB 289 degrees

• VOR 045 degrees NDB 250 degrees