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Mesa > Ice & rain - Fire Protection - Electrical > Flashcards

Ice & rain - Fire Protection - Electrical Flashcards

1
Q

What is the source of heating for wing and cowl anti-ice?

A

6th or 10th stage bleed air

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2
Q

When is cowl anti-ice required to be ON during ground operations?

A

OAT ≤ 10°C

  1. in visible moisture
    (fog with visibility 1 sm or less, rain, snow, sleet, ice crystals),
  2. on contaminated ramps, taxiways or runways
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3
Q

When is cowl anti-ice required to be ON during flight?

A

TAT ≤ 10°C

  1. in visible moisture (such as clouds, rain, snow, sleet,
    or ice crystals) (except when SAT is ≤ -40°C),

or when ICE is annunciated

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4
Q

When is wing anti-ice required to be ON during ground operations?

A

OAT ≤ 5°C in visible moisture
(fog with visibility 1sm or less, rain, snow, sleet, ice crystals),

OAT ≤ 5°C on contaminated runways.

If Type II, Type III or Type IV deicing fluid has been applied,
select wing anti-ice ON just prior to thrust increase for takeoff.

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5
Q

When is wing anti-ice required to be ON during flight operations?

A

TAT ≤ 10° C in visible moisture (such as clouds,
rain, snow, sleet, or ice crystals)

with airspeed < 230 KIAS

except when SAT is ≤ -40° C, or when ICE is annunciated.

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6
Q

What is a good ICE detector test indication?

A

ICE caution message

ICE switchlight illuminated

ADS HEAT TEST OK advisory message.

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7
Q

What is the purpose of the Wing A/I cross-bleed switch?

A

To allow the bleed air from one engine to anti-ice

the opposite wing

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8
Q

What occurs with the Windshield Heat on LOW?

A

All 4 panels are heated to 24°C.

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9
Q

What occurs with the Windshield Heat on HIGH?

A

Side windows are heated to 24°C and both windshields

are heated to 41°C.

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10
Q

How many fire detection loops are installed on each engine?

A

Two, dual loops mounted in parallel.

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11
Q

How many firex bottles are available for an engine fire?

A

Two

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12
Q

What type of Halon is in the engine firex bottles?

A

Halon 1301 pressurized with dry nitrogen.

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13
Q

How is an engine fire detected by the crew?

A

Appropriate ENG FIRE PUSH switchlight illuminates,

fire bell sounds, and an EICAS warning message

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14
Q

What occurs when the ENG FIRE PUSH switchlight is pushed?

A

Fuel SOV closes,

HYD SOV closes,

Bleed air SOVs close,

generator is de-energized

and the appropriate squibs are armed

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15
Q

Can we blow both bottles into one engine, if necessary?

A

Yes.

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16
Q

How many fire detection loops are inside the APU containment case?

A

Two, dual loops

mounted in parallel.

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17
Q

How is an in-flight APU fire detected by the crew?

A

APU FIRE PUSH switchlight illuminates,

fire bell sounds,

APU FIRE warning message on EICAS.

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18
Q

How many firex bottles are available for an APU fire?

A

One.

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19
Q

What type of extinguishing agent is used in the APU firex bottle?

A

Halon 1301 pressurized with dry nitrogen.

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20
Q

What occurs during an unattended APU fire on the ground?

A

APU ECU shuts down the APU.

5 seconds later, the APU bottle will discharge automatically.

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21
Q

What occurs during an APU fire in flight?

A

The APU ECU shuts down the APU.

The bottle does not discharge automatically, the crew must discharge the bottle.

22
Q

How many smoke detectors are there in the aft cargo compartment?

A

Two.

23
Q

How many smoke detectors are there in the fwd cargo compartment?

A

Three

24
Q

What are the flight deck indications of cargo smoke?

A 
Triple chime
Master warning flashers,
“SMOKE” aural,
SMOKE AFT CARGO warning message,
or SMOKE FWD CARGO warning message.
Either FWD or AFT
CARGO SMOKE PUSH
switchlights illuminate.
25
Q

How many firex bottles are there for cargo smoke?

A

Two,

one is a slow metered standard bottle that should last approximately 60 minutes,

and the other is a quick discharge bottle

26
Q

How many smoke detectors are located in the lavatories?

A

One in the fwd and

one in the aft.

27
Q

What indication do we have for smoke in a lavatory?

A

Triple chime,

master warning flashers,

SMOKE FWD LAV or

SMOKE AFT LAV warning message.

28
Q

What protection do we have for a lavatory waste compartment fire?

A

A firex bottle with heat sensitive capsules that will melt to discharge Halon 1301 directly into the waste compartment.

29
Q

What indication will we get with a waste compartment fire?

A

None, unless it generates enough smoke to set off

a smoke detector.

30
Q

Location of Main Battery?

A

Nose compartment

31
Q

Location of the APU Battery/

A

Aft equipment bay

32
Q

Max Engine Generator load?

A

40 KVA

33
Q

Max APU Generator load?

A

40 KVA

34
Q

Max Transformer rectifier unit (TRU) load?

A

120 amps

35
Q

Max permissible time for ground operations with battery power only?

A

5 minutes

36
Q

What is the reason for the previous limitation?

A

To prevent ED1 and ED2 from overheating

fans are AC powered

37
Q

How many TRUs are installed in the CRJ 900?

A

4

38
Q

Where are the TRUs located?

A

nose compartment

39
Q

The Main Battery is rated to?

A

17 ampere hour/24 volts

40
Q

APU Battery is rated to?

A

43 ampere hour/24 volts

41
Q

How many generators are installed?

A

4,

2 engine generators,
1 APU generator,
1 ADG

42
Q

What is the function of the 4 TRUs?

A

To convert 115 V AC

to 28 V DC

43
Q

How are the TRU’s cooled?

A

Individual fans

44
Q

Which buses are powered when the Battery Master switch is selected on?

A

Main battery direct bus, APU battery direct bus,

DC Battery bus

45
Q

If the main buses are powered, are the essential buses automatically powered?

A

Yes

46
Q

Is there an on/off switch for the TRU’S?

A

No, they are automatically powered when the

AC busses are powered

47
Q

What controls the DC tie contactors?

A

The DC Power Centers (DCPC) automatically control DC tie operation.

48
Q

When will the Air Driven Generator (ADG) automatically deploy?

A

With complete loss of A/C power

49
Q

With the ADG deployed, what are the basic items that are powered?

A

AC ESS Bus, Hydraulic pump 3B, flaps/slats, STAB trim CH 2

50
Q

What is the ADG max load?

A

15 KVA

Mesa (7 decks)

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