Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Reciprocating Engine > Module 1 and 2 0engines > Flashcards

Module 1 and 2 0engines Flashcards

1
Q

what is detonation

A

uncontrolled explosion of fuel/air mixture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how calculate compression ratio

A

Total volume of cylinder
____________________
combustion chamber volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

where is MAP taken

A

between the carburetor and throttle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is pre-ignition

A

premature ignition of fuel/air mixture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is a heat engine

A

convert heat energy by combustion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the aprox thermal-efficiency of an internal combustion ?

A

30% heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

example of internal engine and external engine

A

internal =opposed 4 stroke

external =steam engine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

pistons rings ac engines made of ?

A
  • gray cast iron

- chrome plated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

3 types of rings

A
  • compression
  • oil control
  • oil wiper (scraper)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Compression rings have 3 types of cross

A
  • Rectangular
  • tapered
  • wedge
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

must common type of ring joint?

A

butt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

to compensate for uneven expansion heat the piston is

A

cam ground -larger diameter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

undersides of pistons are frequently finned primarily ?

A

to aid cooling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

pistons are machined from what type of alloy?

A

aluminum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

pistons are classified by head design

A
  • flat
  • cupped
  • dommed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

the area between the pistons ring groves is called

A

Ring land

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

purpose of the a piston ring

A
  • provide seal
  • prevent excessive oil
  • conduct heat
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

types of bearings commonly used

A
  • plain
  • roller
  • ball
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

how you clean pack and inspect an anti-friction roller bearing

A
  • clean in solvent
  • air dry (don’t spin)
  • 10 power magnifying glass
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

if exhaust valve open to early what happen ?

A

loss power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what is a valve overlap?

A

number of degrees during intake valve and exhaust valves are open

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what type of engine would you expect to see a camshaft in?

A

opposed-in line-v type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

if intake valve opens to early what symptom will occur ?

A

back fire in the induction system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what is the fit of the piston pin to the piston boss

A

palm push fit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

an engine cylinder is a two piece construction consisting of ?

A
  • cylinder head

- barrel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

when referring to the cylinder numbers on an opposed engine from what direction does one look

A

-always from the back

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is the purpose of a piston

A

-draw air
-transmit force from the cylinder
-manage the pressure in the cylinder and transmit the
force of combustion to the connecting rod

28
Q

knuckle pin is used to ?

A

connect articulating rods to the master rods

29
Q

what color is used to identify a nitrate cylinder

A

-blue

30
Q

what is the purpose of the choke bore cylinder

A

compensate for the uneven expansion cause by heat

31
Q

what precaution is necessary for metal sodium filled valves ?

A

sodium is dangerous material that burns violently when exposed to air

32
Q

why poppet valve

A

pops open and close

33
Q

when the exhaust valve open and close in the 4 cycle

A

open before TDC on the power stroke and closes after TDC on the intake stroke

34
Q

where in the induction system is map measured

A

downstream of carburetor after the throttle valve

35
Q

will MAP ever be higher than the ambient pressure?

A

only in a turbo charged

36
Q

what does the red arc indicate on the RPM gauge

A

max power RPM

37
Q

what kind of ring can withstand higher temp

A

chrome plated ring

38
Q

what are the piston pin made of

A

Nickel steel alloy

39
Q

what kind of pin is used in the lycoming O-320A23

A

full floating

40
Q

what is the most common pin retainer

A

piston pin plug

41
Q

where is the valve clearance measured

A

between the rocker arm and valve tip

42
Q

what type of engine uses a cam ring

A

radial

43
Q

why some engine have gear reduction

A

to keep the speed of the propeller to achieve max efficiency

44
Q

oil pressure is calculate in what unit

A

PSI ( pounds per square inch)

45
Q

what is the valve overlap

A

period when the intake valve and exhaust valve are both open

46
Q

when is the valve clearance set and how is it adjusted on the O320-A23 engine

A

cold clearance by changing the length of the push rod

47
Q

how manu revolutions to complete all 4 stokes

A

two

48
Q

4 strokes of the engine

A
  • intake
  • compression
  • power
  • exhaust
49
Q

the crankshaft change linear motion into

A

rotational motion

50
Q

dynamic damper is for the purpose of ?

A

dampening torsional vibrations

51
Q

main part of crankshaft

A
  • main journals
  • crank pins
  • crank cheek
52
Q

the crankcase supports the crankshaft by

A

main journals

53
Q

aircraft piston engines are classified

A
  • air cooled and liquid cooled
  • internal or external combustion
  • by cylinder arrange =V type, opposed , in line, radial
  • naturally aspired or turbocharger
  • Otto cycle or diesel
  • 4 stroke or 2 stroke
  • carburetor or fuel injector
54
Q

engine noted as a freedom vibrations

A

horizontally opposed

55
Q

what are the 5 events on a cycle

A
  • intake
  • compression
  • ignition
  • power
  • exhaust
56
Q

least friction bearing

A

ball bearing

57
Q

general manufactures required

A
  • efficiency
  • economy
  • reliability
  • durability
58
Q

what makes diesel ideal for an aircraft power plant

A

low RPM and high torque

59
Q

diesel advantages

A
  • high durability
  • better efficiency
  • time to be overhaul
60
Q

difference between otto and diesel

A
  • compression ratio is higher

- diesel has not spark plug

61
Q

which gauge is important to monitor during the engine start

A

-oil pressure

62
Q

will the CHT gauge increase with a reach mixture ?

A

no, it will decrease

63
Q

what does the EGT gauge measured

A

indicates exhaust gas temp used to set mixture

64
Q

how is the IHP calculated ?

A

plank /33.000 horsepower

65
Q

IHP =
FHP=
BHP=
IMEP=

A

indicate horse power
friction horse power
brake horse power
indicated mean effective pressure

Reciprocating Engine (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions