Multi Electrical Systems (Power supplies)
Multi Electrical Systems Quiz
Test your knowledge on the critical aspects of multi electrical systems used in aircraft. This quiz will cover vital topics including battery types, power generation, and fault conditions in generators.
- 10 challenging questions
- Multiple choice and checkbox options
- Perfect for aviation enthusiasts and professionals
State the main difference between Primary and Secondary Cell batteries. (pick 1)
Primary discharges only once (e.g. Memory backup for GPS). Secondary cells can be recharged
Primary cells last for longer (CPU processor) and secondary cells can only be used once
Secondary cells can be recharged but primary cells can re recharged faster
Primary cells discharge instantly (e.g. Memory backup) and secondary takes a while to discharge
What is the nominal output of an aircraft battery
24vac
28vac
28vdc
24vdc
Describe thermal runaway
Thermal runaway is overheating caused by the breakdown of internal resistance (which in turn increases the current drawn). Self-destruction of the battery is possible.
Thermal runaway is the overheating of the aircraft battery due to moisture entering the hull (more in the 5A2)
Thermal runaway is the cooling of the battery due to an endothermic reaction in the surrounding air molecules
Heat escapes the aircraft battery and melts stuff
List the 5 types of AC power generation for aircraft
Generators, CPU’s, APU’s, Inverters or RAT’s
Generators, GPU’s, APU’s, Inverters or RAT’s
Generators, GPU’s, FWH’s, Inverters or RAT’s
Generators, GPU’s, APU’s, Inverters or MAT’s
The Generator Control Unit monitors 3 types of fault conditions, what are they
under and over-frequency
Under and over-current
Differential faults
Under and over-torque
Short to earth's
Under and over-voltage
What is the purpose of the Generator Control Relay
The GCR remotely connects or disconnects the generator from the hydraulic systems
The GCR remotely connects and diffuses any components connected to the APU
The system reconnects all components to the Generator
The GCR remotely connects or disconnects the generator from the electrical systems
What device, normally under emergency conditions can provide AC power from a DC source
Inverter
TRU
Rectifier
APU
What component can provide DC power from an AC source
Inverter
TRU
Lexifier
APU
What's the main advantages of an aircraft APU over an air starter (pick 3)
More rigid
Supply bleed air
Electrical power
Lighter
Power to hydraulics
State one feature from primary bonding and another feature of secondary bonding (pick 2)
Primary bonding utilises the aircraft metal skin to form an earth-return path for both AC and DC systems
Primary bonding uses excess wires from the aircraft circuit to prevent surges
Secondary bonding is the bonding of surfaces that do not normally carry current but electro-static current
Secondary bonding is the bonding of wires that are less likely to heat up from current but instead electro static current
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