Bearing only.

Bearing and range, are NOT acquired simultaneously.

Range only.

Bearing and range, are acquired simultaneously.

the slant range and centre the DME-station.

the slant range and centre the aircraft.

the ground distance and centre the aircraft.

a the ground distance and centre the DME-station.

make the modulation tone audible.

increase the transmission signal of the NDB.

make the carrier wave audible.

cause the ADF to automatically select the best frequency of nearby NDBs.

middle marker.

locator.

inner marker.

outer marker.

118 to 135.95 MHz

 A 108 to 111.95 MHZ 

 108 to 135.95 MHz

108 to 117.95 MHz 

ADF is an ground equipment and NDB can be a ground equipment or an airborne equipment.

NDB is a locator and ADF is an en route nav-aid.

NDB is a ground equipment, and ADF is an airborne equipment.

ADF is a civilian equipment whereas NDB is a military equipment used by civilians too.

less than the actual ground speed because the change in slant range is smaller than the

inaccurate because the aircraft is moving away from the station and the slant range error

greater than the actual ground speed because the change in slant range is greater than the

exactly correct because the aircraft slant range is increasing at the ground speed due to the

10 NM from the threshold on an inbound course and 38 displaced from the localizer centreline.

27 NM from the threshold on an inbound course and 8 displaced from the localizer centreline.

19 NM from the threshold on an inbound course and 13 displaced from the localizer centreline.

20 NM from the threshold on an inbound course and 8 displaced from the localizer centreline.

an increase in the aircraft's rate of descent of approximately 100 ft/min.

a decrease in the aircraft's rate of descent of approximately 50 ft/min.

an increase in the aircraft's rate of descent of approximately 50 ft/min.

a decrease in the aircraft's rate of descent of approximately 100 ft/min.

More than full scale deflections are indicated.

The aircraft fails to receive any modulating signals (90 Hz and 150 Hz).

Another aircraft ahead, on the same ILS approach, is disturbing the transmission.

An incorrect course is selected on the OBI or HSI.