DC Electrics - Bonding and Screening: DGCA Technical General questions

Question 1

Why are static wick dischargers fitted to aircraft?

Accepted Answer

To minimize radio interference

Answer

To smooth the generator output

Answer

To prevent tyres bursting on landing

Answer

To act as an earth return in a single pole electrical system

Question 2

Bonding is used to protect the aircraft against fire from arcing of static electricity by:

Accepted Answer

Ensuring the same electrical potential of all metal components

Answer

Providing an earth return

Answer

Shortening the negative strips

Answer

Maintaining different electrical potential throughout the structure

Question 3

Static electricity constitutes a fire hazard because:

Accepted Answer

Sparks occur due to differences of potential and could ignite inflammable gases and materials

Answer

Metal components become very hot and ignite inflammable gases and materials

Answer

Of colour charged electrons

Answer

Aircraft tyres become heavily charged and may burst on landing

Question 4

Static electrical charges and currents in an aircraft structure are evened out by:

Accepted Answer

Bonding

Answer

Hardening

Answer

Screening

Answer

Anodizing

Question 5

The electrical components of aircraft systems are screened to:

Accepted Answer

Prevent them interfering with the function of radio equipment

Answer

Bond the circuit to reduce risk of fire

Answer

Prevent them discharging

Answer

Prevent short circuits in radio equipment

2 more questions in this chapter