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Piston Engines > Exam Review > Flashcards

Exam Review Flashcards

1
Q

if the points in the magneto never opens, what would be the result`?

A

deadman hang/no sparks will be produce (no current induced in the secondary winding)

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2
Q

how does the wastegate get actuated?

A

Oil Pressure close

Spring Pressure/ fail safe open

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3
Q

if you have shower of sparks, how do you delay the spark for starting?

A

the retard points

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4
Q

how you change the valve clearance for hydraulic lifters?

A

change the length of the push rods

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5
Q

what limits manifold pressure in all throttle settings?

A

VAPC

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6
Q

What would you call Upper Deck Pressure?

A

between compressor discharge & throttle valve (compressor discharge pressure)

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7
Q

How does manifold valve works?

A

spring tension keeps it close

fuel pressure opens it

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8
Q

can you clean the foam filter?

A

no

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9
Q

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?

A

1 mag is not working (change spark plug, wires)

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10
Q

If you have a leak in the manifold valve diaphragm, how would you know it?

A

stains on the vent

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11
Q

Whats the reason to do Bulk Inspection?

A

Abnormalities

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12
Q

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?

A

Fine

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13
Q

Difference between a ground boosting and normalizing turbocharger?

A

ground boost can go above 29.92

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14
Q

If we’re going on a dive, which way is the pitch of the prop gonna go?

A

Coarse

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15
Q

Why would we do a cold cylinder check?

A

if one of the cylinder is not operating properly

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16
Q

what makes the fuel comes out the discharge nozzle?

A

Differential pressure (high pressure on float bowl, low pressure on discharge nozzle)

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17
Q

If we have hissing in the carb or airbox, where is the leak?

A

Intake Valve

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18
Q

when we’re doing a bulk inspection what limits are we working to?

A

service limits (if there’s no service limits use the manufacturers new/overhaul limit)

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19
Q

what is critical altitude refer to?

A

highest altitude where the a/c can fly maintaining its rated horsepower

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20
Q

if the cable in the prop governor breaks or snap, what would be the result?

A

Full fined

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21
Q

what limits manifold pressure at full throttle?

A

APC

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22
Q

what does the airbleed do?

A

assists in atomization, prevents surface tension, assists in fuel discharge

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23
Q

What should you see when doing a carb heat check?

A

slight decrease in rpm

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24
Q

simple form of cabin heat and carb heat uses what type of heating system?

A

heat muffler

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25
Q

how does impulse coupling delay the spark for starting?

A

delays the opening of the points till the piston is at TDC

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26
Q

When doing a mag drop test, you check it at?

A

1700 rpm

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27
Q

where is the supercharger located?

A

Downstream the carburetor (compresses fuel and air)

28
Q

if we don’t have retard breakers, what delays the spark for starting?

A

Impulse Coupling

29
Q

What components takes Upper deck pressure in continental system?

A 
Fuel Nozzle
Cabin Pressurization (Sonic Venturi)
Fuel Pump (for altitude compensation)
30
Q

What kind of oil should we use in breaking in?

A

Mineral

31
Q

If we have hissing in the crankcase vent, where is the leak?

A

Piston or Piston Rings

32
Q

What does impulse coupling dis-engage?

A

when it gets above a certain speed (coming-in speed)

33
Q

if you go to idle cut-off with the mixture control, what should you expect to see as it goes to cut-off?

A

increase in rpm

34
Q

2 types of starting

A

Shower of sparks and impulse coupler

35
Q

What if you don’t see an increase in rpm if you go to idle cut-off?

A

adjust mixture control richer

36
Q

how do you check the piston pin?

A

Micrometer

37
Q

how do we activate the retard points?

A

it has its own circuit on start up (when we select the switch to start, it grounds out the normal/advance points)

38
Q

when you’re setting the e-gap, what should the position of magneto be?

A

Magnetic Neutral

39
Q

Whats the reason to do Major Overhaul or Major Inspection?

A

TBO is reach

40
Q

What do shower of sparks and impulse coupler do?

A

delays spark and prevents kickback until TDC

41
Q

what drives the compressor on a supercharger?

A

Crankshaft (engine)

42
Q

how long can you use paper filter?

A

500 hours

43
Q

whats the difference between the Continental and RSA system?

A

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)

44
Q

how long can you use foam filter?

A

100 hours

45
Q

when timing or installing magneto what position should it be?

A

Before TDC, #1 cylinder, Compression Stroke in the direction of rotation

46
Q

What would you call Manifold Pressure?

A

downstream throttle valve

47
Q

does RSA system have a venturi?

A

yes

48
Q

how do you change the valve clearance for radial engines?

A

rotate the screw (clockwise for decrease, counter-clockwise for increase)

49
Q

if we have a hissing in the stack or muffler, where is the leak?

A

Exhaust Valve

50
Q

what’s gonna limit the upper deck pressure to 2.2?

A

Pressure Ratio Control

51
Q

whats the biggest concern in heat muffler?

A

carbon monoxide on flight compartment

52
Q

what is the problem of cylinder choking?

A

it will mess you up when doing run out checks (dimension)

53
Q

in relation to the float bowl, where does the discharge nozzle located?

A

above the float bowl (to prevents sippage)

54
Q

When doing a live mag check, what throttle position should it be?

A

Idle Power

55
Q

how do you compensate thermal expansion between the steel and the aluminum alloy?

A

Cylinder Choking (chokes when cold)

56
Q

how do you install piston rings?

A

P/N or the dot facing up

never align the gap (always staggered)

57
Q

how do we ensure that the valve and the seat have a proper sealing?

A 
Valve lapping (honning) 
 (proper sealing, proper combustion)
58
Q

can you clean the paper filter?

A

yes

59
Q

Where is the discharge nozzle located?

A

Narrowest point of the venturi

60
Q

does continental system have a venturi?

A

no

61
Q

how do we check crankshaft run-outs?

A

Dial Indicator

62
Q

Side slip maneuvers on the short stack, what does it cause?

A

Thermal Shocking of the cylinder, valves can become to cold

63
Q

when timing a magneto and there’s an impulse coupling what should you do?

A

snap impulse coupler first otherwise it will delay the timing sequence

64
Q

What does the back suction mixture control do?

A

Compensates changes in altitude ( leans as you climb up, riches as you climb down)

65
Q

where does the discharge nozzle located in a pressure carb?

A

downstream/above the throttle valve (prevents icing)

Piston Engines (2 decks)

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