STAGE 1 ERAU EXAM PREP 2026 Q AND A
COMPLETE REVIEW ACCURATE ANSWERS
GUARANTEED PASS
◉ What color light and sound pattern represents the Outer Marker
(OM) on an ILS?(AIM Fig. 1-1-6)
Answer: Blue light and a low-pitch, dashed audio tone.
◉ What does the Middle Marker (MM) on an ILS represent?
Answer: The Decision Height (DH), typically around 200 feet AGL.
◉ How often must VOR receivers be tested for IFR flight?
Answer: Within the preceding 30 days.
◉ What must be done to make a VOR receiver check valid for IFR
flight?
Answer: The test must be written and recorded in the aircraft logs.
◉ In a C172, what happens to the Standby battery when the
alternator is running?
Answer: It is disconnected from the system.
,◉ What is the primary difference between a VOR and a VORTAC?
Answer: A VORTAC combines VOR/DME functions with TACAN
(military tactical air navigation) equipment.
◉ What is the purpose of the 'ARM' position for the STBY BATT
switch?
Answer: It prepares the standby battery to power the Essential Bus
if the main electrical system fails.
◉ What does a positive (+) reading on the battery ammeter
indicate?
Answer: The battery is currently charging.
◉ What does a negative (-) reading on the battery ammeter
indicate?
Answer: The battery is currently discharging (supplying power to
the system).
◉ What are three common errors associated with ILS approaches?
Answer: Inaccurate needle indication when far from the localizer,
false glideslope signals when intercepted from above, and signal
disturbance caused by aircraft below 5000 AGL or on the ground.
◉ What is the purpose of an ILS Critical Area?
, Answer: To prevent ground vehicles or aircraft from disturbing the
glideslope signal.
◉ What is a Localizer Type Directional Aid (LDA)?
Answer: A localizer-based navigation aid that does not include a
glideslope and is not necessarily aligned with the runway.
◉ What components constitute an RNAV system?
Answer: A database of points in the National Airspace System (NAS)
combined with an aircraft's current position (determined by GPS,
VOR/DME, or INS).
◉ How is RNAV controlled in the aircraft?
Answer: Through a Flight Management System (FMS).
◉ What are the three segments of the Global Positioning System
(GPS)?(AIM 1-1-17)
Answer: Space (satellites), User (onboard equipment), and Control
(ground monitoring stations).
◉ How many satellites are required for a 3D (lateral and vertical)
GPS position fix?
Answer: Four satellites.
COMPLETE REVIEW ACCURATE ANSWERS
GUARANTEED PASS
◉ What color light and sound pattern represents the Outer Marker
(OM) on an ILS?(AIM Fig. 1-1-6)
Answer: Blue light and a low-pitch, dashed audio tone.
◉ What does the Middle Marker (MM) on an ILS represent?
Answer: The Decision Height (DH), typically around 200 feet AGL.
◉ How often must VOR receivers be tested for IFR flight?
Answer: Within the preceding 30 days.
◉ What must be done to make a VOR receiver check valid for IFR
flight?
Answer: The test must be written and recorded in the aircraft logs.
◉ In a C172, what happens to the Standby battery when the
alternator is running?
Answer: It is disconnected from the system.
,◉ What is the primary difference between a VOR and a VORTAC?
Answer: A VORTAC combines VOR/DME functions with TACAN
(military tactical air navigation) equipment.
◉ What is the purpose of the 'ARM' position for the STBY BATT
switch?
Answer: It prepares the standby battery to power the Essential Bus
if the main electrical system fails.
◉ What does a positive (+) reading on the battery ammeter
indicate?
Answer: The battery is currently charging.
◉ What does a negative (-) reading on the battery ammeter
indicate?
Answer: The battery is currently discharging (supplying power to
the system).
◉ What are three common errors associated with ILS approaches?
Answer: Inaccurate needle indication when far from the localizer,
false glideslope signals when intercepted from above, and signal
disturbance caused by aircraft below 5000 AGL or on the ground.
◉ What is the purpose of an ILS Critical Area?
, Answer: To prevent ground vehicles or aircraft from disturbing the
glideslope signal.
◉ What is a Localizer Type Directional Aid (LDA)?
Answer: A localizer-based navigation aid that does not include a
glideslope and is not necessarily aligned with the runway.
◉ What components constitute an RNAV system?
Answer: A database of points in the National Airspace System (NAS)
combined with an aircraft's current position (determined by GPS,
VOR/DME, or INS).
◉ How is RNAV controlled in the aircraft?
Answer: Through a Flight Management System (FMS).
◉ What are the three segments of the Global Positioning System
(GPS)?(AIM 1-1-17)
Answer: Space (satellites), User (onboard equipment), and Control
(ground monitoring stations).
◉ How many satellites are required for a 3D (lateral and vertical)
GPS position fix?
Answer: Four satellites.
