3.2 Static Electricity and Conduction

Question 1

A semi-conductor will have.
Option A. two electrons in the outer shell.
Option B. four electrons in the outer shell.
Option C. eight electrons in the outer shell

Answer 1

Four electrons in the outer shell

Question 2

Ion current is found in.
Option A. conductors and semi-conductors.
Option B. liquids and gasses.
Option C. semi-conductors

Answer 2

Liquids and gasses

Question 3

Electricity conducts through.
Option A. vacuum.
Option B. solids and liquids only.
Option C. solids only

Answer 3

Solids and liquids only

Question 4

An example of a good electrical insulator is.
Option A. aluminium.
Option B. glass.
Option C. mercury

Answer 4

Glass

Question 5

Static charges remaining in an aircraft are dissipated by.
Option A. earthing the aircraft as soon as possible.
Option B. the use of a conducting type nose wheel.
Option C. bonding the aircraft to a refuel tanker

Answer 5

The use of a conducting type nose wheel

Question 6

An element could be considered to be a conductor if it has.
Option A. a small number of electrons in its outer orbit.
Option B. a large number of electrons in its outer orbit.
Option C. a large number of electrons

Answer 6

A small number of electrons in its outer shell

Question 7

A charged body is said to have.
Option A. a surplus or deficiency of electrons.
Option B. a deficiency of neutrons.
Option C. a surplus of protons

Answer 7

Surplus or deficiency of electrons

Question 8

The risk of a fire due to static electricity is overcome.
Option A. by connecting all metal components by bonding.
Option B. by fitting static wicks and isolating the battery from inflammable gas sources.
Option C. by fitting static wicks and insulating all metal components

Answer 8

By connecting all metal components by bonding

Question 9

The purpose of bonding is to.
Option A. ensure all components have been securely fitted.
Option B. stop different potentials developing with subsequent fire risks.
Option C. give generated static an easy return path to the generator

Answer 9

Stop different potentials developing subsequent fire risks

Question 10

The various parts of an aircraft airframe are maintained at the same potential by.
Option A. the supply bus-bars.
Option B. bonding.
Option C. static discharge wicks

Answer 10

Bonding

Question 11

The resistance of the current return path through the aircraft is always considered negligible, provided the.
Option A. structure is adequately bonded.
Option B. voltage drop across the circuit is checked.
Option C. generator is properly grounded

Answer 11

Structure is adequately bonded

Question 12

If an insulated conductor is placed near to a negatively charged rod, the nearest end of the conductor becomes.
Option A. No change will occur.
Option B. negatively charged.
Option C. positively charged

Answer 12

Positively charged

Question 13

The electromagnetic force between two charged bodies is.
Option A. inversely proportional to the distance between them.
Option B. inversely proportional to the square of the distance between them.
Option C. proportional to the distance between them

Answer 13

Inversely proportional to the square of the distance in between them

Question 14

If a negatively charged conductor is placed next to an insulated rod.
Option A. the rod becomes negatively charged.
Option B. the rod has no charge.
Option C. the rod becomes positively charged

Answer 14

The rod becomes positively charged