review mod 1-6

Question 1

how many crankshaft revolutions in a full 4 stroke cycle ?

Answer 1

Two

Question 2

metallic sodium cooled valves

Answer 2

sodium melts and the liquids take heat away from the valve head

Question 3

piston displacement formula

Answer 3

V=A x h

Question 4

compression ratio

Answer 4

=Total Volume/comb camber

Question 5

oil viscosity

Answer 5

resistance to flow

Question 6

oil flash point

Answer 6

temp at which a liquid begins to give off ignitable vapors

Question 7

oil fire point

Answer 7

temp at which a liquid there are sufficient vapors to support a flame

Question 8

oil cloud point

Answer 8

temp at which it wax content begin to solidify and separates on crystals

Question 9

oil pour point

Answer 9

lowest temp at which it flows or can be poured

Question 10

functions of lubricating oil

Answer 10

• reduce friction
• seal
• cushion
• cooling
• cleaning
• corrosion
• hydraulic action

Question 11

type of oil sump

Answer 11

gear type constant displacement

Question 12

what is a gerotor pump

Answer 12

another type of constant displacement,consist in an engine -driven spur gear that rotates within a free sniping rotor housing

Question 13

scavenge pump

Answer 13

return oil to the reservoir, can be gerotor or gear pump

Question 14

what means updraft or downdraft in carbs,

Answer 14

• direction of the air flow

- most AC used updraft

Question 15

what is a throttle valve or butterfly valve

Answer 15

controls the amount of air passing through carburetor

Question 16

main metering on (carbs )

Answer 16

supplies fuel to the venturi at all speeds above idle

Question 17

main discharge nozzle (carbs)

Answer 17

incorporate an air bleed which helps atomize fuel (breaks fuel tension )

Question 18

air bleed (carbs)

Answer 18

used to emulsify the fuel and breaks the surface tension in main metering jet (also used in the idle to emulsify fuel)

Question 19

Idling

Answer 19

throttle valve is nearly closed (pressure differential not enough to draw out fuel from the main discharge nozzle )

Question 20

idle valve

Answer 20

-connected to the throttle
-controls fuel flow for 1-3 degrees
-to maintain metered fuel pressure at idle power
settings
-above 3 degrees throttle movement has not metering
effect

Question 21

continuous-flow injection system

Answer 21

fuel is injected and mix with air in each intake port

Question 22

types of fuel injection systems

Answer 22

• precision airmotive RSA

- teledyne-continental

Question 23

advantage of fuel injections

Answer 23

-correct amount of fuel per each cylinder
-less susceptible to ice build up
-Increase power over Carbs
-does not required priming system
-fuel pressure is maintained above vapour formimg
pressure

Question 24

fuel injection basic components

Answer 24

• fuel pump (creates positive pressure)
• fuel metering (meters fuel)
• fuel distribution ( ensure fuel delivery)
• fuel injection (consistent spray pattern)

Question 25

what types of pump has fuel injections systems

Answer 25

• gear

- vane

Question 26

function of fuel metering (injections)

Answer 26

the fuel control unit manages the throttle and mixture inputs (venturi housing)

Question 27

fuel distribution

Answer 27

• delivering the regulate fuel to the nozzles
• flow divider
• manifold valve assembly
• distribution valve

Question 28

fuel injectors

Answer 28

threaded into the cylinder head near the intake port

Question 29

Bendix fuel injection

Answer 29

Venturi housing, fuel metering unit and fuel regulator are cast as a single unit

Question 30

what kind of pump used Bendix system

Answer 30

airframe fuel pump (engine driven fuel pump) EDFP and uses fuel and air to metering forces to meter fuel

Question 31

function of the ball valve in Bendix regulator

Answer 31

create differential pressure across the metering jet

Question 32

Constant head idle spring

Answer 32

holds valve off the seat when air flow is low (idle)

Question 33

Constant effort springs

Answer 33

pre-loads the air diaphragm

provides smooth transition between idle and cruise power

Question 34

mixture control and throttle valve linkage

Answer 34

from pilot

Question 35

main metering jet

Answer 35

meters fuel

Question 36

enrichment jet

Answer 36

provides more fuel at high power settings

Question 37

purpose of fuel metering

Answer 37

supply the correct amount of fuel to engine

Question 38

fuel metering consist of?

Answer 38

• 4 chambers
• air/fuel diaphragm
• ball valve

Question 39

function of variable orifice in a fuel pump

Answer 39

• used above cruise power

- sets fuel pressure proportional to the engine speed

Question 40

function of the relief valve in a fuel pump

Answer 40

• excess fuel return to the inlet of the pump

- helps maintain constant output pressure

Question 41

function evacuated bellows in a fuel pump

Answer 41

-aneroid bellows
-allows turbo charger to catch up, preventing rich
mixture
-turbo charger (upper deck pressure is sensed on the bellows)

Question 42

fuel control unit

Answer 42

receive inputs from pilots throttle and mixture control

Question 43

fuel metering valve

Answer 43

control by throttle position

Question 44

fuel injections adjustments

Answer 44

idle mixture and idle speed