AEIS CHAPTER 8

Question 1

EMI refers to

Answer 1

electromagnetic inteference

Question 2

EMC refers to

Answer 2

electromagnetic compatibility

Question 3

EM refers to

Answer 3

electromagnetic fields

Question 4

RF refers to

Answer 4

radio frequency

Question 5

EMI refers to the i) of an electronic device in the vicinity of an ii) in the iii) spectrum emitted by iv)

Answer 5

disruption, electromagnetic field, radio frequency, another device

Question 6

EMC is the ability of a device to function i) in its ii) without introducing iii)

Answer 6

satisfactorily, electromagnetic environment, intolerable electromagnetic disturbances

Question 7

an aircraft is constantly exposed to i)

Answer 7

electromagnetic(EM) fields

Question 8

EM fields can cause i) to aircraft systems if not managed properly

Answer 8

interference

Question 9

the design of aircrafts requires incorporation of i) so that ii) does not negatively affect other systems

Answer 9

electromagnetic compatibility (EMC) , electromagnetic interference (EMI)

Question 10

HIRF refers to

Answer 10

high intensity radiated fields

Question 11

some of the design considerations for EMC include i) away from possible source of ii)

Answer 11

placing sensitive circuit or receiver, electrical noise

Question 12

some of the design considerations for EMC is to ensure i) to ii) to minimize receiving iii)

Answer 12

i) suitable orientation of reciever
ii) signal source
iii) unwanted signals

Question 13

some of the design considerations for EMC include introducing a i) from noisy source or receiver

Answer 13

grounding shield

Question 14

some of the design considerations for EMC include minimising i) from sources with ii)

Answer 14

minimising potential electrical noise, careful design

Question 15

some of the design considerations for EMC include designing i) to be less sensitive to ii)

Answer 15

highly-selective receivers, electrical noise

Question 16

how can EMI problems in an aircraft be minimized

Answer 16

ensure all electronic equipment and systems is operated with a good electrical ground system

Question 17

i) connecting avionic systems should be ii) to keep unwanted RF energy from coupling into or radiating outwards

Answer 17

harnesses and cables, electrically shielded

Question 18

components such as line i) and ii) can be installed in power lines and circuits to reduce EMI susceptibility

Answer 18

electronic filters, transient-absorbers

Question 19

HIRF requirements are applied to ensure i) of aircraft electrical and electronic systems without ii), iii) or iv)

Answer 19

i) safe operation
ii) interruption
iii) failure
iv) malfunction

Question 20

to overcome residual charge, aircraft is fitted with a i) or ii) which contains a compound providing the tyre with iii)

Answer 20

nose-wheel tyre, tail-wheel tyre, with good electrical conductivity

Question 21

to overcome residual charge, a short i) is used to secure the i) or ii) to the iii)

Answer 21

flexible steel wire, nose wheel, main wheel axle members, earth or ground point

Question 22

why traditional aircraft are able to survive lightning strikes

Answer 22

traditional aircraft had metallic structures and the effect of Faraday’s cage shielded the aircraft against the effect of lightning strikes