ATAC509 - Week 1 + Week 2
Electrical System Maintenance Quiz
Test your knowledge on essential electrical systems maintenance practices through our comprehensive quiz! Designed for technicians and aviation enthusiasts, this quiz covers topics from proper procedures to battery management.
- 58 challenging questions
- Multiple choice format
- Improve your technical skills
L1 - In addition to pulling and collaring the circuit breaker, what else should be done when performing maintenance on an electrical system?
Restrict all other technicians from working on the aircraft
Placard the switch/control for the system
Make an entry in the logbook
Flag the physical component being worked on
L1 - In addition to placarding the switch/control for the system, what else should be done when performing maintenance on an electrical system?
Flag the physical component being worked on
Pull and collar the circuit breaker for the system
Restrict all other technicians from working on the aircraft
Make an entry in the logbook
L1 - What is a risk associated with using metal tools while working on electrical systems?
Metal tools can conduct electricity and cause short circuits
Metal tools can cause corrosion
Metal tools can become magnetized
Metal tools can damage an aircraft if dropped
L1 - Which of the following should be removed when performing electrical repairs?
Watches
Rings
Necklaces
All of the above
L1 - What is the proper order for connecting external ground power to an aircraft?
Ground airframe, connect power, power on, verify control positions
Connect power, verify safe to connect, ground airframe, power on
Ground airframe, verify safe to connect, connect power, power on
Verify control positions, connect power, power on, verify safe to connect
L1 - Which of the following is the least desirable method for confirming the integrity of an electrical system?
Continuity check
Measuring resistance
Measuring voltage
Measuring current
L1 - What happens when a short circuit occurs?
A warning lamp illuminates in cockpit indicating short circuit
Nothing, the system simply stops working
High resistance results in very little current flow
Excessive current & heat can result in a fire
L1 - What is the risk from metal tools being left onboard an aircraft following maintenance?
Noise of tools sliding around will annoy the passengers
Add weight to the aircraft
Movement of tool can contact a live electrical circuit and cause a short circuit
AME will be upset because they have to buy a new tool
L1 - What is used to neutralize a spilled electrolyte from a lead acid battery?
Water
Boric acid
Baking soda
Sulfuric acid
L1 - What is used to neutralize a spilled electrolyte from a NiCad battery?
Water
Potassium Hydroxide
Baking soda
Boric acid
L1 - When is thermal runaway on a NiCad battery most likely to occur?
During normal operation/use
During the capacity test
At beginning of the charge cycle
During the deep cycle
L1 - Which of the following is NOT a symptom of thermal runaway?
Decrease in cell voltage
Increase in cell voltage
Increase in current draw
Increase in cell temperature
L1 - What type of diagram does the image represent?
Block diagram
Schematic diagram
Visual diagram
Pictorial diagram
L1 - What type of diagram does the image represent?
Block diagram
Visual diagram
Pictorial diagram
Schematic diagram
L1 - What type of diagram does the image represent?
Schematic diagram
Visual diagram
Pictorial diagram
Block diagram
L1 - What type of approach is desired when troubleshooting a snag?
Phone a friend approach
Logical & systematic
Shotgun approach
Random & unorganized
L1 - The type of material used in making a cell determines?
Current
Size
Capacity
Voltage
L1 - The amount (quantity) of active material used in making a cell determines?
Capacity
Cell Voltage
Battery voltage
Type of battery
L1 - A battery rated at 35 AH can deliver?
5A for 6 hours
6A for 6 hours
7A for 5 hours
70A for 2 hours
L1 - What happens to the internal resistance of a battery as it discharges?
Increases
Remains constant
Decreases
Nothing, batteries don't have internal resistance
L1 - How long must a battery be able to provide emergency power to the aircraft?
30 minutes
45 minutes
60 minutes
90 minutes
L1 - How many cells are in a 24 volt lead acid battery?
6
12
20
24
L1 - What is the open cell voltage of a lead acid cell?
1.2 V
1.5 V
2.1 V
3.3 V
L1 - What are the active materials applied to the grids in a lead acid battery?
Spongy lead & lead peroxide
Antimony & lead peroxide
Spongy lead & antimony
Lead peroxide & sulfuric acid
L1 - What materials are used to construct the grid in a lead acid battery?
Lead & Antimony
Lead & Zinc
Lead & Tungsten
Lead & Uranium
L1 - What material is applied to the grid to form negative plates in a lead acid battery?
Lead peroxide
Spongy lead
Cadmium
Antimony
L1 - What material is applied to the grid to form positive plates in a lead acid battery?
Lead peroxide
Nickel
Antimony
Spongy lead
L1 - What electrolyte is used in lead acid batteries?
Boric acid
Potassium hydroxide
Sulfuric acid
Distilled water
L1 - What is produced in a lead acid battery during discharge?
Lead sulfate
Lead peroxide
Spongy lead
Sulfuric acid
L1 - What is produced in a lead acid battery during discharge?
Lead peroxide
Spongy lead
Water
Sulfuric acid
L1 - What happens when a lead acid battery is left in a discharged state for a prolonged period of time?
Plate materials convert to lead sulfate
Lead sulfate hardens & battery becomes sulfated
Cell plates can warp
Battery will hold its charge but requires a recharge before use
L1 - When servicing lead acid batteries, what precautions must be taken?
Wear PPE
Remove metal jewelry
Ensure neutralizing agent is available
All of the above
L1 - How is the state of charge of a lead acid battery determined?
Measure the voltage
Check the paperwork
Perform a capacity check
Measure the specific gravity
L1 - What is the definition of specific gravity?
Quantity of electrolyte in the cell
Density of electrolyte compared to the density of water
Open circuit voltage compared to closed circuit voltage of a cell
Volume of electrolyte compared to the volume of water
L1 - What is used to measure the specific gravity of a lead acid battery cell?
Hydrometer
Anemometer
Barometer
Thermometer
L1 - What happens to the specific gravity of a lead acid cell during discharge?
Drops to zero
Decreases
Remains constant
Increases
L1 - What happens to the specific gravity of a lead acid cell during charging?
Increases
Remains constant
Drops to zero
Decreases
L1 - What is the specific gravity of a fully charged lead acid cell?
1.24-1.32
1.275-1.300
1.30
1.50
L1 - What is the open circuit voltage of a 12V lead acid battery?
2.1 V
12 V
12.6 V
14 V
L2 - During servicing of a lead acid battery you notice that it has a low electrolyte level. What should you add to the battery to top up the electrolyte level?
Distilled water
Sulphuric acid
Boric acid
Tap water
What are the active materials used in the construction of a NiCad battery?
Nickel & Hydroxide
Lead & Cadmium
Nickel & Lead
Nickel & Cadmium
What is the specific gravity of a fully charged NiCad cell?
1.24-1.32
1.275-1.300
1.50
2.30
What electrolyte is used in NiCad batteries?
Potassium hydroxide
Sulfuric acid
Boric acid
Sodium bicarbonate
What happens to the specific gravity of a NiCad cell during discharge?
Decreases
Remains constant
Increases
Drops to zero
What happens to the specific gravity of a NiCad cell during recharging?
Increases
Drops to zero
Decreases
Remains constant
How is the state of charge of a NiCad battery determined?
Measure the voltage
Specific gravity
Perform a capacity check
Put a known amount of charge into the battery
What charging rate (% of AH rating) is typically used when servicing NiCad batteries?
80%
100%
140%
150%
In a NiCad battery, under what condition would you adjust the electrolyte level immediately after starting the charge cycle?
Only if electrolyte level is low
Never!
Topping up electrolyte at start of charge cycle is standard procedure
Greater than 1.5 V cell voltage is measured
What is the approximate voltage of a NiCad cell?
1.2 V
1.5 V
2.0 V
2.1 V
What is a benefit of NiCad batteries compared to Lead Acid Batteries?
NiCad electrolyte is less corrosive & dangerous than Lead Acid electrolyte
NiCad batteries require fewer cells for the same voltage
NiCad batteries are not susceptible to thermal runaway
NiCad batteries maintain an almost constant voltage throughout discharge
What happens when a NiCad battery is overcharged?
Risk of explosion as the water in the electrolyte breaks down
Hydrogen gas is released at the negative plates
Oxygen gas is released at the positive plates
All of the above
If a NiCad battery passes its capacity check, what is the next step?
Fully discharged
Deep cycled
Tagged serviceable & placed on shelf
Recharged
If a NiCad battery fails its capacity check, what is the next step?
Recharged
Tagged unserviceable & scrapped
Deep cycled
Tagged serviceable & placed on shelf
During the deep cycling of a NiCad battery, when a cell voltage drops below 0.5 volts, what is done?
Short the cell with shorting strip
Disconnect cell from battery
Nothing, continue to monitor
Remove cell from battery
Once all cells have been shorted in a NiCad battery, how long should you wait until further action is taken?
30 minutes
1 hour
3 hours
12 hours
Why is it important that all paperwork be completed when servicing NiCad batteries?
Because paperwork is required for battery to be serviceable
To maintain history of the battery for determining useful life remaining
Because paperwork is FUN!
To avoid repetition of work already performed when determining state of charge of battery
What can happen if Lead Acid and NiCad batteries come into contact with each other during servicing?
Thermal runaway
Nothing, there is no problem
Dielectric breakdown
Electrolytes (and their fumes) can neutralize each other
What is the purpose of the ELA?
Determine the intermittent, continuous & essential electrical loads
Determine the size of battery required in the aircraft
Calibrate the ammeter
Determine whether the aircraft electrical system can handle the electrical loads
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