Exam Review Flashcards
if the points in the magneto never opens, what would be the result`?
deadman hang/no sparks will be produce (no current induced in the secondary winding)
how does the wastegate get actuated?
Oil Pressure close
Spring Pressure/ fail safe open
if you have shower of sparks, how do you delay the spark for starting?
the retard points
how you change the valve clearance for hydraulic lifters?
change the length of the push rods
what limits manifold pressure in all throttle settings?
VAPC
What would you call Upper Deck Pressure?
between compressor discharge & throttle valve (compressor discharge pressure)
How does manifold valve works?
spring tension keeps it close
fuel pressure opens it
can you clean the foam filter?
no
when doing a mag drop test and you have difference in rpm between the 2 magnetos and the engine starts to run rough whats the problem?
1 mag is not working (change spark plug, wires)
If you have a leak in the manifold valve diaphragm, how would you know it?
stains on the vent
Whats the reason to do Bulk Inspection?
Abnormalities
If we’re flying along and we don’t put an input on the prop gov, what way is the pitch of the prop gonna go?
Fine
Difference between a ground boosting and normalizing turbocharger?
ground boost can go above 29.92
If we’re going on a dive, which way is the pitch of the prop gonna go?
Coarse
Why would we do a cold cylinder check?
if one of the cylinder is not operating properly
what makes the fuel comes out the discharge nozzle?
Differential pressure (high pressure on float bowl, low pressure on discharge nozzle)
If we have hissing in the carb or airbox, where is the leak?
Intake Valve
when we’re doing a bulk inspection what limits are we working to?
service limits (if there’s no service limits use the manufacturers new/overhaul limit)
what is critical altitude refer to?
highest altitude where the a/c can fly maintaining its rated horsepower
if the cable in the prop governor breaks or snap, what would be the result?
Full fined
what limits manifold pressure at full throttle?
APC
what does the airbleed do?
assists in atomization, prevents surface tension, assists in fuel discharge
What should you see when doing a carb heat check?
slight decrease in rpm
simple form of cabin heat and carb heat uses what type of heating system?
heat muffler
how does impulse coupling delay the spark for starting?
delays the opening of the points till the piston is at TDC
When doing a mag drop test, you check it at?
1700 rpm
where is the supercharger located?
Downstream the carburetor (compresses fuel and air)
if we don’t have retard breakers, what delays the spark for starting?
Impulse Coupling
What components takes Upper deck pressure in continental system?
Fuel Nozzle Cabin Pressurization (Sonic Venturi) Fuel Pump (for altitude compensation)
What kind of oil should we use in breaking in?
Mineral
If we have hissing in the crankcase vent, where is the leak?
Piston or Piston Rings
What does impulse coupling dis-engage?
when it gets above a certain speed (coming-in speed)
if you go to idle cut-off with the mixture control, what should you expect to see as it goes to cut-off?
increase in rpm
2 types of starting
Shower of sparks and impulse coupler
What if you don’t see an increase in rpm if you go to idle cut-off?
adjust mixture control richer
how do you check the piston pin?
Micrometer
how do we activate the retard points?
it has its own circuit on start up (when we select the switch to start, it grounds out the normal/advance points)
when you’re setting the e-gap, what should the position of magneto be?
Magnetic Neutral
Whats the reason to do Major Overhaul or Major Inspection?
TBO is reach
What do shower of sparks and impulse coupler do?
delays spark and prevents kickback until TDC
what drives the compressor on a supercharger?
Crankshaft (engine)
how long can you use paper filter?
500 hours
whats the difference between the Continental and RSA system?
Continental has a fuel pump and provides fuel pressure (on start up fuel pump doesn’t activate right away, fuel pressure opens bypass valve then goes to the fuel manifold valve)
how long can you use foam filter?
100 hours
when timing or installing magneto what position should it be?
Before TDC, #1 cylinder, Compression Stroke in the direction of rotation
What would you call Manifold Pressure?
downstream throttle valve
does RSA system have a venturi?
yes
how do you change the valve clearance for radial engines?
rotate the screw (clockwise for decrease, counter-clockwise for increase)
if we have a hissing in the stack or muffler, where is the leak?
Exhaust Valve
what’s gonna limit the upper deck pressure to 2.2?
Pressure Ratio Control
whats the biggest concern in heat muffler?
carbon monoxide on flight compartment
what is the problem of cylinder choking?
it will mess you up when doing run out checks (dimension)
in relation to the float bowl, where does the discharge nozzle located?
above the float bowl (to prevents sippage)
When doing a live mag check, what throttle position should it be?
Idle Power
how do you compensate thermal expansion between the steel and the aluminum alloy?
Cylinder Choking (chokes when cold)
how do you install piston rings?
P/N or the dot facing up
never align the gap (always staggered)
how do we ensure that the valve and the seat have a proper sealing?
Valve lapping (honning) (proper sealing, proper combustion)
can you clean the paper filter?
yes
Where is the discharge nozzle located?
Narrowest point of the venturi
does continental system have a venturi?
no
how do we check crankshaft run-outs?
Dial Indicator
Side slip maneuvers on the short stack, what does it cause?
Thermal Shocking of the cylinder, valves can become to cold
when timing a magneto and there’s an impulse coupling what should you do?
snap impulse coupler first otherwise it will delay the timing sequence
What does the back suction mixture control do?
Compensates changes in altitude ( leans as you climb up, riches as you climb down)
where does the discharge nozzle located in a pressure carb?
downstream/above the throttle valve (prevents icing)
