AMS 274 UNIT 4 EXAM WITH CORRECT
QUESTIONS AND ANSWERS 2025
A typical Gear ratio for an air turbine starter is 25:1. If the
turbine is rotating @ 80,000 RPM's, what would the input RPM be to the
gear box? - CORRECT-ANSWERS>>>>>3,200 RPM
With a variable vane system when will the vanes be most closed? -
CORRECT-ANSWERS>>>>>at Low RPM
What happens if the vanes are stuck in the open position? - CORRECT-
ANSWERS>>>>>Engine will stall in low power
A clicking noise heard from an air turbine starter on engine coast
down is a result of what? - CORRECT-ANSWERS>>>>>Pawls re-engaging and
riding the ratchet in case we need a re-start
Which igniter plug requires special handling due to semi-conductor
material? - CORRECT-ANSWERS>>>>>Low voltage shunted surface gap (Self
Ionizing)
What does the semi conductor material do when its HOT and COLD? -
CORRECT-ANSWERS>>>>>Cold- Conducts
, Hot- Isolates
What is autoignition and what does it sense? - CORRECT-
ANSWERS>>>>>Ensures instantaneous igniton if an engine loses power.
Senses Torque, Oil Pressure, and loss of Compressure dischatge
pressure
What positions are fail type anti-ice valves in? - CORRECT-
ANSWERS>>>>>Powered closed and spring loaded open
What instrument indication would you most likely see when engine anti-
ice is turned on? - CORRECT-ANSWERS>>>>>Slight Rise in EGT (10
Degrees)
Starting sequence - CORRECT-ANSWERS>>>>>Starter, Ignition, Fuel
When do you disengage the starter? - CORRECT-ANSWERS>>>>>When it
reaches self accelerating speed
Where is the Pressure Regulating and Shutoff valve located? - CORRECT-
ANSWERS>>>>>Pneumatic starter Unit
QUESTIONS AND ANSWERS 2025
A typical Gear ratio for an air turbine starter is 25:1. If the
turbine is rotating @ 80,000 RPM's, what would the input RPM be to the
gear box? - CORRECT-ANSWERS>>>>>3,200 RPM
With a variable vane system when will the vanes be most closed? -
CORRECT-ANSWERS>>>>>at Low RPM
What happens if the vanes are stuck in the open position? - CORRECT-
ANSWERS>>>>>Engine will stall in low power
A clicking noise heard from an air turbine starter on engine coast
down is a result of what? - CORRECT-ANSWERS>>>>>Pawls re-engaging and
riding the ratchet in case we need a re-start
Which igniter plug requires special handling due to semi-conductor
material? - CORRECT-ANSWERS>>>>>Low voltage shunted surface gap (Self
Ionizing)
What does the semi conductor material do when its HOT and COLD? -
CORRECT-ANSWERS>>>>>Cold- Conducts
, Hot- Isolates
What is autoignition and what does it sense? - CORRECT-
ANSWERS>>>>>Ensures instantaneous igniton if an engine loses power.
Senses Torque, Oil Pressure, and loss of Compressure dischatge
pressure
What positions are fail type anti-ice valves in? - CORRECT-
ANSWERS>>>>>Powered closed and spring loaded open
What instrument indication would you most likely see when engine anti-
ice is turned on? - CORRECT-ANSWERS>>>>>Slight Rise in EGT (10
Degrees)
Starting sequence - CORRECT-ANSWERS>>>>>Starter, Ignition, Fuel
When do you disengage the starter? - CORRECT-ANSWERS>>>>>When it
reaches self accelerating speed
Where is the Pressure Regulating and Shutoff valve located? - CORRECT-
ANSWERS>>>>>Pneumatic starter Unit
