engines and airframes

Question 1

what does a turbo/supercharger do

Answer 1

increases altitude at which full power can be maintained

Question 2

what happens to propellor in loss of oil pressure

Answer 2

single engine - goes closer to fine (becomes fixed-pitch)
multi - full coarse (feather turned on manually)

Question 3

how does altitude relate to fuel/air mixture

Answer 3

climb = less dense air = richer mixture
descend = more dense air = leaner mixture

Question 4

What is the main icing hazard for turbocharged engines?

Answer 4

impact ice - visible moisture in air at less than -4 degrees C

Question 5

below what RPM should a fixed-pitch prop aircraft use the carb heat at all times?

Answer 5

2100RPM

Question 6

what is throttle ice?

Answer 6

when the throttle is partially closed and at lower power settings, it has the same effect as a venturi, causing the air to speed up and moisture to freeze as a result

Question 7

what should be done with the mixture when the carb heat is being ran continuously?

Answer 7

The mixture should be leaned (less dense air (hotter) = richer mixture)

Question 8

advantages of fuel injection system

Answer 8

uniform fuel distribution
more power
better cooling
less icing susceptability
fuel savings
faster throttle response
easier cold start

Question 9

does an alternator need to provide current at low RPM settings?

Answer 9

yes

Question 10

4 purposes of engine oil

Answer 10

lubricating
cooling
sealing
cleaning

Question 11

what are the colors of 80, 100LL, and jet fuels

Answer 11

red, blue, clear

Question 12

what happens if too high a grade of fuel is used

Answer 12

spark plug fouling