DGCA DC Electrics 9. Bonding And Screening

Results

Q1. Why are static wick dischargers fitted to aircraft?

To smooth the generator output

To prevent tyres bursting on landing

To minimize radio interference

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

Correct answer is – To minimize radio interference

Q2. Bonding is used to protect the aircraft against fire from arcing of static electricity by:

providing an earth return

shortening the negative strips

maintaining different electrical potential throughout the structure

ensuring the same electrical potential of all metal components

Correct answer is – ensuring the same electrical potential of all metal components

Q3. Static electricity constitutes a fire hazard because:

metal components become very hot and ignite inflammable gases and materials

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

of colour charged electrons

aircraft tyres become heavily charged and may burst on landing

Correct answer is – sparks occur due to differences of potential and could ignite inflammable gases and materials

Q4. Static electrical charges and currents in an aircraft structure are evened out by:

hardening

screening

bonding

anodizing

Correct answer is – bonding

Q5. The electrical components of aircraft systems are screened to:

bond the circuit to reduce risk of fire

prevent them discharging

prevent short circuits in radio equipment

prevent them interfering with the function of radio equipment

Correct answer is – prevent them interfering with the function of radio equipment

Q6. Bonding is a method of:

heat screening

providing a positive reaction

ensuring that the different parts of the aircraft are maintained at a different potential

ensuring that the different parts of the aircraft are maintained at the same potential

Correct answer is – ensuring that the different parts of the aircraft are maintained at the same potential

Q7. The purpose of electrical bonding on an aircraft is:

to prevent compass malfunctioning and accumulation of local static charges

to reduce the anodizing effect

to provide a low resistance path for earth return circuits and safely dissipate local static charges and lightning strikes

to isolate all components electrically and therefore make static potential constant

Correct answer is – to isolate all components electrically and therefore make static potential constant

Submit The Test