IX Make up four types of questions to the sentences.

1 An aircraft is fitted with one or two main batteries depending on its size and

role.

2 The battery is located as close as possible to its point of distribution; this is to

reduce IR losses through heavy-duty cables.

3 The battery can be located in the engine compartment, alternatively behind the

luggage compartment in the rear fuselage.

4 On some larger GA aircraft the battery is located in the leading edge of the

wing.

5 Other locations include the nose equipment bay on medium size helicopters or

attached to the external airframe.

6 For larger aircraft, e.g. the Boeing 737, one battery is located in the Avionics

compartment.

7 Batteries are installed in a dedicated box or compartment designed to retain it in

position and provide ventilation.

8 The battery compartment is usually fitted with a tray to collect any spilt

electrolyte and protect the airframe.

9 Tray material will be resistant to corrosion and non-absorbent.

10 The structure around the battery compartment will be treated to reduce any

damage from corrosion resulting from any spilt electrolyte or fumes given off

during charging.

11 Batteries must be secured to prevent them from becoming detached during

aircraft maneuvers; they are a fire risk if they become detached from their tray.

12 When installing batteries in the aircraft, extreme care must be taken not to

directly connect (or ‘short circuit’) the terminals.

13 This could lead to a high discharge of electrical energy causing personal harm

and/or damage to the aircraft.

14 The battery must be secured without causing any deformation of the casing

which could lead to plate buckling and internal shorting.

15 Main battery installations must be vented to allow gases to escape, and

accommodate electrolyte spillage.

16 Rubber or other non-corroding pipes are used as ventilation lines which

direct the gases overboard, usually terminating at the fuselage skin.

17 On pressurized aircraft the differential pressures between cabin and

atmosphere are used to draw air through the venting system. Some

installations contain traps to retain harmful gases and vapors.

18 Removal of the aircraft battery can result in loss of power to any clocks that

are electrically.

19 It will usually be necessary to check and reset the clocks on the flight deck

when battery power is eventually restored.

20 If you disconnect the main battery with no power to the AIMS cabinets, you

lose some data.