1) Spillage of a lead acid electrolyte is detected by Report

indicating paper that turns red

indicating paper that turns blue

litmus paper that turns black

2) To restore electrolyte after spillage Report

add a mixture of acid and water of the same s.g. as that in the battery

add acid only

add distilled water only

3) When a DC generator fails, the pilot will receive the following indications Report

Rising voltage and current discharge with a red PFWL

An audio bell and red PFWL

Zero current on the ammeter and a red PFWL

4) The preferred method of battery charging a Ni-Cad battery is constant Report

speed

current

voltage

5) When operating two AC generators unparalleled, the phase of each Report

is unimportant

must be in opposition to one another

must be synchronized

6) When the GPU is connected to the aircraft Report

it supplies essential services

it is not paralleled with the aircraft generator

it is paralleled with the aircraft generator

7) A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2 ohms resistance. The internal resistance of the battery in this instance is Report

5.0 ohms

2.52 ohms

0.52 ohms

8) The rating of an aircraft alternator is 40 KVA at PF 0.8 lagging Report

The maximum load under all conditions is 40KVA

The maximum load under all conditions is 40KW

The maximum load permitted is 32KW

9) An I.D.G (integrated drive generator). Report

does not require a CSDU

incorporates the alternator and CSD as one unit

has separate CSDU

10) A P.M.G (Permanent Magnet Generator) is a small built in generator which Report

only rotates after starting

only rotates during starting

provides initial excitation

11) To parallel an alternator with another alternator the alternators must have the same Report

frequency, voltage and phase relationship

frequency, RPM and speed

frequency, RPM and phase relationship

12) Speed of an alternator may be controlled by Report

keeping engine rpm constant

varying the field current

CSDU (constant speed drive unit).

13) Frequency wild' alternators supply Report

capacitive circuits

inductive circuits

resistive circuits

14) The real load of an alternator is directly related to Report

output voltage

output shaft rpm

output shaft torque

15) How is initial voltage build-up ensured in a brushless generating system, before full output is available from the voltage regulator? Report

Excitation form the DC busbars is automatically provided during the start sequence

A switch must be operated by the crew to provide excitation form the dc busbar to bring generator on line

Permanent magnets are mounted between the exciter field poles

16) Insulation resistance of electrical machines is Report

normally lower when the machine is hot

not affected by change of temperature of machine

normally higher when the machine is hot.

17) A ni-cad battery is stored in the Report

fully discharged condition

dry condition

fully charged condition

18) What should you do if the electrolyte is found to be low in one cell of a lead acid battery?. Report

Cell is defective, replace the battery

Replace the defective cell

Top-up the individual cell with distilled water

19) The purpose of a thermistor in a brushless AC generator is to Report

keep the resistance of the rectifiers nearly constant at varying temperatures

keep the exciter field resistance nearly constant at varying temperatures

compensate for temperature changes in the main AC stator windings

20) One lamp is connected across corresponding phases of two alternators. They will be synchronised when Report

the lamp is maximum brightness

the lamp is extinguished

the lamp is either at maximum brightness or is extinguished

EASA Questions Module%2011 Set%2011:%20battery

Set 1: Theory of flight

Set 2: Airframe Structures

Set 3: Aeroplanes-Fuselage

Set 4: Cabin Pressurisation

Set 5: Instruments

Set 6: Avionic system

Set 7: Avionic system

Set 8: Navigation

Set 9: Electrical Power

Set 10: Electrical System

Set 11: Battery

Set 12: Equip & Furnishing

Set 13: Fire Protection

Set 14: Fuel Systems

Set 15: Hydraulic Power

Set 16: Ice & Rain

Set 17: Flight Controls

Set 18: Flight Controls_1

Set 19: Landing Gear

Set 20: Lights

Set 21: Oxygen

Set 22: Pneumatic

Set 23: Water & Waste