AS 321 EXAM 3 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
What defines High Performance aircraft? - Answers an airplane with an engine of more than 200 hp
What defines complex Airplane? - Answers -retractable landing gear
-flaps, and
-controllable pitch propeller
What defines high altitude aircraft - Answers an aircraft that has a service ceiling or max operating
altitude, whichever is lower, above 25,000 ft MSL
What is required to act as PIC in
a. high performance
b. complex
c. high altitude - Answers a. received and logged ground training from an authorized instructor in a
high performance a/c or simulator and received endorsement
b. received and logged ground training from an authorized instructor in a complex a/c or simulator
c. received ground and flight training
What is a TCDS? - Answers Type Certificate Data Sheet
What is 14 CFR 61.31? - Answers Type rating requirements, additional training, and authorization
requirements
What are the four cycles of a four cycle internal combustion engine? - Answers intake, compression,
combustion, exhaust
What is detonation? symptoms? remedies? - Answers multiple flame fronts; too lean mixture, fuel
grade too low, excessive heat, compression ration high; promote cooling of engine! reduce power,
enrich mixture, open cowl flaps
What is pre-ignition? symptoms? remedies? - Answers uncontrolled firing; ignites before switched;
promote engine cooling! reduce power, enrich mixture, open cowl flaps.
What is altimeter setting? - Answers value of atmospheric pressure
What effect does a higher density altitude have on
a. performance
b. t/o distance
c. landing distance - Answers decreases performance and increases t/o and landing roll
what is the purpose of a turbo-charger? - Answers to fly faster, farther, higher, and over weather;
stuff more air molecules into the combustion chamber
Turbo-charge engines get their boost from.... - Answers exhaust gasses
What is the purpose of a super-charger? - Answers pressurizes the air intake to above atmospheric
pressure; better performance
What are the component parts of a turbo-charger? - Answers - waste gate = controls amount of
exhaust gas back into the engine
- intercooler = lower induction air by as much as 100F
How fast can turbo-chargers spin? - Answers 75,000 to 150,000 rpm in cruise
What are some of the problems/concerns with turbo-chargers? - Answers - higher operating temps
- higher maintenance costs
- higher initial cost
- higher overhaul cost
What are two types of fixed-pitch propellers? - Answers - climb prop
- cruise prop
how does a constant speed propeller work? - Answers converts high % of engine power into thrust
over or wide range of rpm and airspeed combos
effective pitch - Answers the distance it actually advances through the air in one revolution
geometric pitch - Answers theoretical distance a propeller should advance in one revolution
propeller slip - Answers the difference between the geometric pitch of the propeller and its effective
pitch
What controls MP and RPMs with a constant speed propeller? - Answers RPM maintained by way of
the prop governor
Fuel/air mixture maintained by throttle
How to power-up and power-down a constant speed propeller? - Answers Power-up = add prop, add
throttle
Power-down = reduce throttle, reduce prop
What defines High Performance aircraft? - Answers an airplane with an engine of more than 200 hp
What defines complex Airplane? - Answers -retractable landing gear
-flaps, and
-controllable pitch propeller
What defines high altitude aircraft - Answers an aircraft that has a service ceiling or max operating
altitude, whichever is lower, above 25,000 ft MSL
What is required to act as PIC in
a. high performance
b. complex
c. high altitude - Answers a. received and logged ground training from an authorized instructor in a
high performance a/c or simulator and received endorsement
b. received and logged ground training from an authorized instructor in a complex a/c or simulator
c. received ground and flight training
What is a TCDS? - Answers Type Certificate Data Sheet
What is 14 CFR 61.31? - Answers Type rating requirements, additional training, and authorization
requirements
What are the four cycles of a four cycle internal combustion engine? - Answers intake, compression,
combustion, exhaust
What is detonation? symptoms? remedies? - Answers multiple flame fronts; too lean mixture, fuel
grade too low, excessive heat, compression ration high; promote cooling of engine! reduce power,
enrich mixture, open cowl flaps
What is pre-ignition? symptoms? remedies? - Answers uncontrolled firing; ignites before switched;
promote engine cooling! reduce power, enrich mixture, open cowl flaps.
What is altimeter setting? - Answers value of atmospheric pressure
What effect does a higher density altitude have on
a. performance
b. t/o distance
c. landing distance - Answers decreases performance and increases t/o and landing roll
what is the purpose of a turbo-charger? - Answers to fly faster, farther, higher, and over weather;
stuff more air molecules into the combustion chamber
Turbo-charge engines get their boost from.... - Answers exhaust gasses
What is the purpose of a super-charger? - Answers pressurizes the air intake to above atmospheric
pressure; better performance
What are the component parts of a turbo-charger? - Answers - waste gate = controls amount of
exhaust gas back into the engine
- intercooler = lower induction air by as much as 100F
How fast can turbo-chargers spin? - Answers 75,000 to 150,000 rpm in cruise
What are some of the problems/concerns with turbo-chargers? - Answers - higher operating temps
- higher maintenance costs
- higher initial cost
- higher overhaul cost
What are two types of fixed-pitch propellers? - Answers - climb prop
- cruise prop
how does a constant speed propeller work? - Answers converts high % of engine power into thrust
over or wide range of rpm and airspeed combos
effective pitch - Answers the distance it actually advances through the air in one revolution
geometric pitch - Answers theoretical distance a propeller should advance in one revolution
propeller slip - Answers the difference between the geometric pitch of the propeller and its effective
pitch
What controls MP and RPMs with a constant speed propeller? - Answers RPM maintained by way of
the prop governor
Fuel/air mixture maintained by throttle
How to power-up and power-down a constant speed propeller? - Answers Power-up = add prop, add
throttle
Power-down = reduce throttle, reduce prop
