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WorksheetsM5.12 - Electrostatic Sensitive Devices Cat B1 and B2
Total questions: 15
Worksheet time: 8mins
Which statement is true for Electrostatic Sensitive Device (ESD) problems?
They can only occur when a unit is replaced with power switched on.
They cannot occur when the aircraft is grounded.
They can be reduced if servicing personnel are grounded.
When is the build-up of electrostatic charge on a material lower?
When the humidity is low.
When the material is non-conductive.
When the material is conductive.
Which condition increases the build-up of electrostatic charge when two materials are in contact?
If both materials are non-conductive.
If both materials are conductive.
If the humidity is high.
Which of the following is a precaution for handling Electrostatic Sensitive Device (ESD)?
ESD must be stored in containers made from insulating materials.
Handle faulty ESD with the same care as new parts.
Power must be turned on before removing ESD.
What happens if anti-static wrist straps are not worn during Electrostatic Sensitive Device (ESD) handling at workstations?
The component is damaged.
It has no effect on the component.
The current flow to earth is at a minimum.
What can an uncontrolled current flow, caused by an electrostatic discharge, cause?
A short circuit.
Open and short circuits.
A local overheat as well as bending and splitting of the layers.
Which of the following situations would generate large amounts of static electricity if movement is present between them?
Movement between two insulators.
Movement between an insulator and conductor.
Movement between two conductors.
What is the purpose behind handling faulty LRUs the same as new ones?
This prevents personnel from accidentally installing a faulty LRU.
This prevents any static build up on the faulty LRU.
This prevents any further faults being placed on the damaged LRU.
What effect will humidity have on the generation of static electricity?
The amount of static generated will be higher with high humidity due to the air being denser.
The amount of static generated will increase due to low humidity.
Humidity does not make any difference to the amount of static generated.
Which statement is true for Electrostatic Sensitive Device (ESD) problems?
They can only occur when a unit is replaced with power switched on.
They cannot occur when the aircraft is grounded.
They can be reduced if servicing personnel are grounded.
What are the two main classes of electronic devices based on their operation?
Conductor and insulator
Bipolar and unipolar
Metal and plastic
Static and dynamic
Which of the following devices is considered part of the Unipolar class?
MOSFET
Bipolar Transistor
Computer CPU
Laser Diode
Why are Field Effect Transistors (FETs) particularly vulnerable to damage from static electricity?
They have low input impedance
They use voltage to control current
They operate in the milliampere (mA) ranges
They have a high input gate resistance
What is the potential consequence of electrostatic discharge on Solid State Drives (SSDs)?
Short circuit (common)
Evaporation
Local overheat
Bend or layer-split
What precautions should be taken to reduce the ESD problem when handling aircraft electronic components?
Avoid using ground conductors on footwear
Handle ESD outside their protective packaging
Ensure personnel handling ESD are untrained
Store and transport ESD in anti-static materials
