M5.12 - Electrostatic Sensitive Devices Cat B1 and B2

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.