Navigation Flashcards

1
Q

How much time is required for initial IRS alignment

A

Approximately 10 minutes at mid-latitudes

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2
Q

When the IRS Mode Selector is placed from OFF to the NAV position, what does the momentary illumination of the ON DC light indicate

A

The IRS alternate power source is available from the switched hot battery bus

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3
Q

What is the origin of the present position lat and long. Used in IRS alignment

A

Lat and long. Are selected from the database and entered by the crew

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4
Q

What is required for an IRS to automatically enter the NAV mode

A

All are required

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5
Q

What information is provided by the IRS in addition to present position, heading and attitude signals

A

Ground speed, ground track & wind data

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6
Q

Which IRS entries are subjected to the reasonableness test

A

Latitude & longitude

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7
Q

If,at the beginning of IRS alignment, the present position entry in the IRS fails the reasonableness test and the same position is re-entered, what indication does the crew see

A

The ALIGN light returns to steady ON

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8
Q

What condition may cause a reasonableness test failure when proper entry of present position has been accomplished

A

Aircraft has been moved to a different location with the IRS OFF

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9
Q

Which IRS entry or entries are cross checked by the system performance test

A

Latitude only

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10
Q

Which causes IRS alignment to be lost inflight

A

Moving the selector switch to ALIGN

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11
Q

After entering the present position during IRS alignment, what would indicate a reasonableness test failure

A

The ALIGN light flashes

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12
Q

What information is lost and can not be restored when inflight alignment of an IRS is lost

A

Present position

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13
Q

What are the normal electrical power sources for the IRS

A

The Standby AC bus for the left IRS & the No.2 Transfer bus for the right IRS

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14
Q

Which is correct for IRS backup source of electrical power

A

Left IRAs by the switched hot battery bus & right IRS by the switched hot battery bus for 5 minutes

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15
Q

Which statement is correct concerning IRS inflight present position

A

The crew can never update the IRS position inflight

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16
Q

What does an illuminated IRS DC FAIL light indicate

A

The IRS backup power source is not available

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17
Q

During the IRS initialization, if the reasonableness test fails, the ALIGN annunciator flashes. If the same wrong data is reentered a second time the ALIGN annunciator will continue to flash

18
Q

The pilot can update the current IRS lat and long any number of times without delaying alignment as long as the IRS has not entered the NAV mode

19
Q

What is true regarding the IRS

A

The IRS’s are the sole source of Attitude and Heading except for the Standby Compass and Standby Attitude Indicator

20
Q

What does the IRS performance test check

A

The latitude entered by the pilot

21
Q

Which statement describes the IRS

A

All answers are correct

22
Q

During normal IRS Alignment, the momentary illumination of the “ON DC” annunciator indicates____

A

The “ON DC” annunciator illuminates to indicate that the IRAs is capable of operating from it’s backup DC power source

23
Q

What is the power source for the right IRS when AC Transfer Bus #2 is lost

A

Switched hot battery bus for a maximum of 5 minutes

24
Q

Which of the following will cause a flashing ALIGN light on the IRS Mode Panel during alignment

A

All answers are correct

25
During IRS alignment, all of the following will cause a flashing ALIGN light except
NAV database out of date
26
During normal IRS Alignment, the momentary illumination of the "ON DC" annunciator indicates____
A successful self test to indicate that the IRS backup DC power source is available
27
Which bus normally powers the left IRS
AC Standby Bus
28
When IRS alignment is lost inflight, all___\ features are lost for the remainder of the flight
Track and groundspeed
29
During takeoff with the flight director in the TOGA mode below 400ft, roll commands are for
Maintaining aircraft wings level
30
What does an illuminated F/D master light indicate
Indicates which FCC provides logic to F/D & A/P modes
31
What ensures that both the CAPT and F/O will have the same F/D VOR/LOC command guidance when the CAPT master F/D light is on
The same VHF frequency & course selection must be set on CAPT & F/O radios
32
How is the master F/D determined with no A/P engaged
The first F/D turned on
33
Both master lights on the Mode Control Panel ate illuminated at the same time when
The GA mode is engaged below 400 ft
34
How is the F/D TO mode engaged
Place both F/D switches to ON & press either TO/GA switch
35
What are the F/D pitch commands during the takeoff roll
10 degrees nose down until 60 knots, the 15 degrees nose up
36
When the First Officer is flying an ILS approach using the "A" autopilot, the APP mode will follow signals from the #2 Nav radio
False
37
When is the Flight Director Go-Around Mode armed
Below 2000 feet AGL
38
During a dual autopilot approach (A/P GA mode) which are the FMA and MCP indications when the GA mode is engaged
TO/GA is annunciated,IAS/ MACH display blanks
39
What is the initial F/D GA pitch command during a 2 engine missed approach
15 degrees nose up
40
What A/T thrust is generated during a F/D GA when the TOGA button is depressed once
A/T engages in GA and advances thrust toward the reduced go-around N1 to produce a 1000-2000 fpm rate of climb
41
How can the F/D APP mode be disengaged after the localizer and glideslope have been captured
All answers are correct
42
What causes the F/D command bars to bias out of view
Automatically at 59 feet RA on an ILS approach