Brainscape's Knowledge GenomeTM

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


See full index

Q400 > Engines - Propeller System > Flashcards

Engines - Propeller System Flashcards

1
Q

Engine type?

A

Pratt and Whitney PW150A

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

Propeller type?

A

Dowty R408

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

SHP? NTOP, MTOP

A

NTOP 4580 SHP
Auto uptrim after EF 5071 SHP on one engine MTOP

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

3 stage low pressure axial compressor air is displayed as?

A

NL

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

Second stage of compression is the high pressure centrifugal compressor which is displayed as?

A

NH

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

Two igniter plugs in the combustion chamber do what?

A

Used for initial ignition during engine start

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

What are the compressors driven by?

A

Single stage turbines

(NH turbine and NL turbine)

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

What drives the Reduction gear box?

A

Power turbines (NPT)

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

Reduction gear box transmits power to drive the?

A

Propeller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where is the starter/ generator mounted?

A

Accessory gear box

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the starter generator switch over?

A

50%

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

Components driven by accessory gearbox?

A

Fuel metering unit
Permanent magnet alternator
Oil pressure scavenge and pumps

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

What is driven by the reduction gearbox?

A

AC generator
EDP
propeller pitch control unit (PCU)
Propeller overspeed governor

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

Power lever position?

A

RATING

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

When is FADEC used?

A

Forward and reverse ranges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

In BETA range power levers control the?

A

Propeller blade angle using the Propeller Electronic Control (PEC)

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

Power levers forward of the RATING detent does what to the toque and propeller speed?

A

FADEC linearly increases engine power from rated power to 125% of MTOP
Cause the props to set 1020RPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Flight idle gate purpose?

A

Prevents moment into the ground beta range

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

When in DISC the prop blades are at what angle?

A

0 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Do not use max reverse thrust under what speed?

A

60KIAS

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

Reverse speed control for the prop is between?

A

660 and 950RPM
Max 1020RPM

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

Condition levers have two main purposes?

A

Introduce and terminate fuel flow during engine start and shutdown
& control propeller RPM

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

Condition lever positions? 5

A

MAX1020RPM
900RPM
MIN 850 RPM
START AND FEATHER
FUEL OFF

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

Condition lever set to max does what?

A

Provides an engine rating of NTOP

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

Conditions levers at 900RPM and power levers in rating detent provides?

A

MCL max climb power

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

Condition levers at MIN850 and power levers at rating provides?

A

Maximum cruise power (MCR)

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

Fuel metering unit (FMU) driven by?

A

Accessory gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

FMU controls fuel based on demands from?

A

FADEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

How many FADECs in the AC?

A

One on each engine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

FADEC also controls what valves?

A

Handling bleed off valves (HBOV)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Propeller underspeed governing limits prop speed to?

A

A minimum 660RPM (Np) in the air and on the ground with the condition overs forward of start & feather

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

FADEC prevents an engine overspeed by?

A

Cutting off fuel if NH exceeds 108%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

FADEC prevents engine torque limits exceeding what?

A

Reverse 35%
Forward range 106%
Over travel range 125%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Spurious propeller feathering at a high power setting what will FADEC do?

A

Rapidly reduces NH preventing torque from exceeding 135%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What controls engine start and shutdown sequence?

A

FADEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

FADEC critical fault results in?

A

The engine stabilising at FLIGHT IDLE or
The engine automatically shutting down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

1 or 2 ENG FADEC FAIL warning light?

A

FADEC critical fault

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

FADEC cautionary fault results in?

A

Asymmetric power lever positions for symmetrical power or
Engine surge from rapid power lever movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

1 or 2 ENG FADEC caution light?

A

FADEC cautionary fault

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

FADEC advisory fault?

A

Not critical or cautionary just needs maintenance prior to next flight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Source of power for FADEC?

A

Permanent magnet alternator (PMA) above 20% Nh
ESS BUS for Engine starting or PMA failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

FADEC provides electrical power to?

A

Propeller electronic control (PEC)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Reduced take off power is achieved by?

A

2% each DEC push (max reduction 10%)
On the ED it’ll show the RDC TOP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Reset button on REC TOP does what?

A

Resets to NTOP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Reduced NP landing will be what?

A

850RPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

How to set up reduced np landing mode?

A

Press RDC Np LDG button
Power levees between flight idle and half way.
Condition levers can then be set to max whilst it remains at 850np (must do within 15 seconds)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Automatic take off power control system does what?

A

Power Uptrim if engine fails

48
Q

Uptrim when taking off at NTOP and RDC what happens?

A

NTOP goes to MTOP
RDC adds 10% to the torque being used

49
Q

Is Arming of ATPCS automatic?

A

Yes when power lever angles are high and torque is at least 50%

50
Q

If uptrim is detected what will you see?

A

UPTRIM message on ED in reverse video colours for 5 seconds then reverts to normal video

51
Q

When will uptrim be activated?

A

Torque falls below 25% or
NP decreases below 816RPM or
auto feathers

52
Q

How many torque sensors are there and how many need to sense a loss of torque before UPTRIM signal generated?

A

Two sensors and both must sense the loss

53
Q

How to deactivate UPTRIM?

A

Moving both power levers below the RATING detent

54
Q

How does the bleed selector effect take off power when not at MIN?

A

Must be at MIN to allow for uptrim or it will be a very reduced torque for the detent

55
Q

With OEI how can you change to power to MCP?

A

By selecting NORM or MAX on the bleed air selector

56
Q

When to move the condition lever during engine start?

A

At first indication of NH move to start and feather

57
Q

After start Engine stabilises at?

A

64.2% NH

58
Q

What light must be out before starting the second engine?

A

SELECT push light (takes 15 seconds after the START light goes out)

59
Q

How long can you exceed 880 degrees?

A

20 seconds

60
Q

What temp must you never exceed for ITT?

A

920 degrees

61
Q

FADEC auto Eng start abort when?

A

Light off does not occur within 16 seconds of fuel flow introduction

If 920 degree starting ITT is exceeded

62
Q

Will FADEC abort a hung start?

A

No manual intervention required

63
Q

Cranked starting limits?

A

70 seconds on
2 mins off
70 seconds on
2 mins off
70 seconds on
30 mins off

64
Q

Air start vs ground start?

A

Auto abort and ITT over temp features of the FADEC are disabled

65
Q

How does FADEC know if it’s an air start or on the ground?

A

WOW or 75kts

66
Q

1 or 2 ENG OIL PRESS warning light?

A

Oil pressure below 44psi

67
Q

A/F ARM in reverse video means?

A

Auto feather is armed on takeoff

68
Q

Fuel flow (FF) shown in?

A

Kilograms per hour

69
Q

ITT maximum radial line on gauge changes how?

A

NTOP rating red radial line will display 822-847 depending on temperature and altitude

Other ratings 880

Engine start 920

70
Q

Oil temperature scale adjustments occur when and change to? Look at pictures to see colour arc changes

A

Propeller heat is on 55degrees 65PSI
Propeller heat off 65 degrees 65PSI

Power levers below idle 55 degrees 65PSI
Power levers above idle 55 degrees 65PSI

71
Q

Propeller control system include?

A

Propeller electronic control (PEC)
Propeller oversepeed governor (OSG)
Alternate feathering pump
Automatic propeller synchrophase system

72
Q

PEC does what?

A

Controls propeller pitch and speed

73
Q

What safety responses does PEC have?

A

Autofeather
Automatic underspeed propeller control
Initiation of UPTRIM command to FADEC

74
Q

Purpose of OSG?

A

Prevent overspeed if a malfunction occurs

75
Q

Alternate feather pump powered by?

A

28V DC

76
Q

How and when alternate feather pump used?

A

Activates automatically for a EF on takeoff or by pressing the #1 or 2 ALT FTHR guarded switch lights

77
Q

When won’t synchrophase work?

A

On the ground and 1020RPM

78
Q

How propeller pitch controlled?

A

Modulating oil pressure on either side of the pitch change piston located in the propeller hub. Fails to coarse

79
Q

How does the OSG work?

A

Signals to FMU to reduce fuel flow to the engine when NP reaches 1173RPM (115%). Fuel reduction then causes power to drop which lower prop RPM

80
Q

1 or 2 PEC caution light

A

Loss of electrical power power
Loss of both PEC outputs
Failure of both PCU valves

Causing the prop to be feathered

81
Q

Cautionary PEC fault what happens? (#1 or 2 PEC)

A

Need maintenance before next flight
BETA control below flight idle is unavailable

82
Q

AUPC stands for?

A

Automatic underspeed protection circuit

83
Q

How to do auto feather test?

A

Power levers DISC, CL start & feather
Press autofeather select button

84
Q

What will you see during auto feather test?

A

-A/F SELECT above the NP indicators.
A/E TEST IN PROGRESS outboard of the NP indicators.
- UPTRIM in reverse Video at the top centre of the ED, ITT red radial increases to a higher value
- NTOP changes to MTOP and torque bugs increase by 10%
A/F ARM appears twice in reverse video replacing
A/F SELECT

85
Q

What will you see at the end of a successful A/F test?

A

A/F TEST PASSED

86
Q

The autofeather system is disarmed ?

A

When autoleather is deselected

87
Q

The autofeather system will arm, displaying the message A/F ARM, when ?

A

Power lever angles are greater than 60 degrees and torque above 50%

88
Q

Starter engagement is limited to a maximum of ?

A

70 seconds

89
Q

What is the purpose of the EVENT MARKER button on the engine control panel?

A

To store engine data from 2 minutes prior to 1 minute after the button is pressed

90
Q

Fuel flow for each engine is indicated on the engine display in ?

A

Kilograms per hour

91
Q

Fuel sent to the engines is heated by ?

A

An oil/fuel heat exchanger

92
Q

Illumination of the #1 ENG FADEC caution light indicates ?

A

A cautionary fault has occurred

93
Q

When the condition levers are positioned to the MAX/1020 detent during flight the default rating power is ?

A

NTOP

94
Q

Should the primary source of power fail to an engine FADEC it will be powered by ?

A

28 V DC essential bus

95
Q

Illumination of the #1 ENG FADEC FAIL warning light will also be accompanied by ?

A

The engine stabilising at flight idle or shutting down

96
Q

The diameter of the propellers fitted to the Dash 8 Q400 is closest to ?

A

4 metres

97
Q

At normal takeoff power (NTOP) each engine develops ?

A

4580 SHP

98
Q

The green arc on the oil pressure gauge ranges between ?

A

61 and 72 PSI

99
Q

Reduced NP landing mode is cancelled when ?

A

The power levers are advanced to angles greater than 65 degrees

100
Q

The propeller overspeed governor consists of ?

A

A flyweight governor and gear pump driven by the reduction gearbox

101
Q

The engine FADECs are located ?

A

On their respective engines

102
Q

Leaving the combustion chamber the exhaust gases first pass through the…

A

NH turbine

103
Q

When FADEC detects an engine flameout it automatically…

A

Activates both engine igniters

104
Q

During normal operations, for how long should an engine be left at START and FEATHER prior to shutdown ?

A

30 seconds

105
Q

When the power levers are in reverse after landing the normal RPM range is ?

A

660-950

106
Q

During engine start the ITT is limited to a maximum of…

A

920 degrees C for 20 seconds

107
Q

To allow the aircraft to climb with maximum climb power with the propeller at 850 RPM…

A

Select condition levers to 850, press the MCL button

108
Q

The selectable condition lever settings to control RPM during flight are ?

A

850, 900 and 1020 RPM

109
Q

The engine low pressure compressor is a..

A

Three stage axial compressor

110
Q

During engine start ‘light-up’ is detected by FADEC as…

A

An ITT increase of 20 degrees C

111
Q

Which of the following components is NOT mounted on the propeller reduction gearbox?

A

DC starter / generator

112
Q

Moving a condition lever to FUEL OFF shuts down the engine by…

A

Sending an artificial NH overspeed signal to the FADEC, closing the engine feed shutoff valve

113
Q

During engine start, DC generators supply DC power above…

A

50% NH

114
Q

Illumination of the #1 ENG OIL PRESS warning light indicates the oil pressure has dropped below approximately…

A

44 PSI

115
Q

When the power levers are moved to the RATING detent position the power produced is…

A

Relative to condition lever position

Q400 (24 decks)

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