AMS 263 MIDTERM EXAM 2025/2026 QUESTIONS WITH
SOLUTIONS GRADED A+
✔✔What is the function of the distributor valve in deicing systems? - ✔✔Connects the
suction side and controls the inflation sequence
✔✔What is the purpose of the outflow valve? - ✔✔Primary cabin pressure control,
regulates the
amount of pressurized air that is allowed to exit
the cabin.
Relieves the pressure in excess of the amount for which it is set
✔✔What happens when water mixes with refrigerant? - ✔✔Creates Hydrochloric Acid
✔✔What is the Unpressurized mode? - ✔✔The outflow valve remains open and the
cabin pressure is the same as the ambient pressure. (0ft - 8,000ft.)
✔✔What is Isobaric mode? - ✔✔The cabin pressure is maintained at a specific cabin
altitude as flight altitude changes by opening and closing the outflow valve (modulates)
(8,000ft - 21,000ft.)
✔✔What is Constant Differential Mode? - ✔✔Allows the cabin altitude to increase, but
maintains the maximum allowable pressure differential. (21,000ft - X)
✔✔What were to happen if water remains in the vapor cycle? - ✔✔A single drop of
water can freeze and expand blocking the flow of refrigerant into the evaporator.
✔✔How far apart should clamps be? - ✔✔16 inches
✔✔What does sharp bends and steep rises do to fuel lines? - ✔✔Creates Vapor Lock
✔✔What is the flow rate for gravity fed systems? - ✔✔150% of the takeoff fuel
consumption
✔✔What is the flow rate for pump feed systems? - ✔✔125% of the take off fuel flow
required for are reciprocating engine
✔✔How do you repair an integral tank? - ✔✔Reseal or restrike rivets.
✔✔If you want to purge a tank what gas should be used? - ✔✔CO2
✔✔If you were to weld a tank what would you do before welding? - ✔✔Steam the tank
, ✔✔What is the wing dihedral? - ✔✔Angle of the wing (tip to tip) compared to the lateral
axis.
✔✔What is a washed in wing? - ✔✔Washing in a wing creates more lift by adjusting it to
have a greater AOI
✔✔What is a washed out wing? - ✔✔If one wing is adjusted to a lesser AOI
✔✔What can be done if a one wing is heavier than the other? - ✔✔You can increase
the AOI of the heavy wing (wash in) or decrease the AOI on the other wing (wash out)
✔✔What is required on a placard near the fuel tank? - ✔✔The words AVGAS and
minimum fuel grade
✔✔Should the boost pump be on or off when troubleshooting for leaks? - ✔✔Yes, boost
pump on
✔✔What is the AOI? - ✔✔The Angle of Incidence is the ratio between the chord line
and longitudinal axis.
✔✔What is the AOA? - ✔✔The Angle of Attack is the ratio between the chord line and
relative wind.
✔✔What movement in the cockpit controls the rudder? - ✔✔Pushing the left and right
pedal
Push right pedal: Rudder moves right, nose moves right.
Push left pedal: Rudder moves left, nose moves left.
✔✔What movement in the cockpit controls the elevators? - ✔✔Moving the yoke forward
and aft. (Push in, pull out)
Forward: Elevator moves down, nose points down.
Aft: Elevator moves up, nose points up.
✔✔What movement in the cockpit controls the ailerons? - ✔✔Turning the yoke left and
right.
Turned right: right aileron goes up, left moves down.
Turned Left: left aileron moves up, right moves down.
✔✔What allows equal pressure on brakes? - ✔✔Floating caliper
✔✔What causes a brake pedal to slowly move to the floor? - ✔✔A bad seal in the
master cylinder
✔✔What must be done prior when bleeding brakes? - ✔✔Remove all fluid
SOLUTIONS GRADED A+
✔✔What is the function of the distributor valve in deicing systems? - ✔✔Connects the
suction side and controls the inflation sequence
✔✔What is the purpose of the outflow valve? - ✔✔Primary cabin pressure control,
regulates the
amount of pressurized air that is allowed to exit
the cabin.
Relieves the pressure in excess of the amount for which it is set
✔✔What happens when water mixes with refrigerant? - ✔✔Creates Hydrochloric Acid
✔✔What is the Unpressurized mode? - ✔✔The outflow valve remains open and the
cabin pressure is the same as the ambient pressure. (0ft - 8,000ft.)
✔✔What is Isobaric mode? - ✔✔The cabin pressure is maintained at a specific cabin
altitude as flight altitude changes by opening and closing the outflow valve (modulates)
(8,000ft - 21,000ft.)
✔✔What is Constant Differential Mode? - ✔✔Allows the cabin altitude to increase, but
maintains the maximum allowable pressure differential. (21,000ft - X)
✔✔What were to happen if water remains in the vapor cycle? - ✔✔A single drop of
water can freeze and expand blocking the flow of refrigerant into the evaporator.
✔✔How far apart should clamps be? - ✔✔16 inches
✔✔What does sharp bends and steep rises do to fuel lines? - ✔✔Creates Vapor Lock
✔✔What is the flow rate for gravity fed systems? - ✔✔150% of the takeoff fuel
consumption
✔✔What is the flow rate for pump feed systems? - ✔✔125% of the take off fuel flow
required for are reciprocating engine
✔✔How do you repair an integral tank? - ✔✔Reseal or restrike rivets.
✔✔If you want to purge a tank what gas should be used? - ✔✔CO2
✔✔If you were to weld a tank what would you do before welding? - ✔✔Steam the tank
, ✔✔What is the wing dihedral? - ✔✔Angle of the wing (tip to tip) compared to the lateral
axis.
✔✔What is a washed in wing? - ✔✔Washing in a wing creates more lift by adjusting it to
have a greater AOI
✔✔What is a washed out wing? - ✔✔If one wing is adjusted to a lesser AOI
✔✔What can be done if a one wing is heavier than the other? - ✔✔You can increase
the AOI of the heavy wing (wash in) or decrease the AOI on the other wing (wash out)
✔✔What is required on a placard near the fuel tank? - ✔✔The words AVGAS and
minimum fuel grade
✔✔Should the boost pump be on or off when troubleshooting for leaks? - ✔✔Yes, boost
pump on
✔✔What is the AOI? - ✔✔The Angle of Incidence is the ratio between the chord line
and longitudinal axis.
✔✔What is the AOA? - ✔✔The Angle of Attack is the ratio between the chord line and
relative wind.
✔✔What movement in the cockpit controls the rudder? - ✔✔Pushing the left and right
pedal
Push right pedal: Rudder moves right, nose moves right.
Push left pedal: Rudder moves left, nose moves left.
✔✔What movement in the cockpit controls the elevators? - ✔✔Moving the yoke forward
and aft. (Push in, pull out)
Forward: Elevator moves down, nose points down.
Aft: Elevator moves up, nose points up.
✔✔What movement in the cockpit controls the ailerons? - ✔✔Turning the yoke left and
right.
Turned right: right aileron goes up, left moves down.
Turned Left: left aileron moves up, right moves down.
✔✔What allows equal pressure on brakes? - ✔✔Floating caliper
✔✔What causes a brake pedal to slowly move to the floor? - ✔✔A bad seal in the
master cylinder
✔✔What must be done prior when bleeding brakes? - ✔✔Remove all fluid
