30 Questions
Which of the following is NOT a function in aircraft that relies on electricity?
Propulsion
What is the flow of electrons through a conductor known as?
Conduction
Who was one of the first individuals to record mentions of electricity as early as 500 B.C.?
Thales
In which direction do many textbooks claim current flows from?
Positive to negative
What did Thales observe attracted light objects when rubbed with substances like amber or jet?
Feathers
Which newer aircraft designs mentioned rely entirely on electrically actuated flight controls?
Designs eliminating control cables
Which unit is equivalent to 6.28 x 10^18 electrons?
Coulomb
What is the symbol used to represent electrical quantity?
Q
What causes electrons to flow in a circuit?
EMF
What is the standard unit of resistance in an electrical circuit?
Ohm
Which term represents the amount of power dissipated when one amp of current flows under a force of one volt?
Watt
What is typically used to generate power?
Electricity
What happens to the force between two electrically charged objects if the distance between them is cut in half?
The force increases by a factor of four.
What do the lines of electrostatic force represent between two opposite charges?
Connecting the charges
When a glass rod is rubbed with silk, what charge does the glass rod acquire?
Positive charge
What happens when a neutrally charged pith ball touches a positively charged rod?
The pith ball assumes a positive charge.
How do the attracting and repelling forces between charges vary with distance?
They vary as the inverse of the square of the distance.
What term is also used to refer to electrostatic fields?
Dielectric fields
What must be done prior to fueling an aircraft to prevent incidents?
Ground the aircraft to the earth
How does a glass rod become negatively charged?
Rubbing it with a piece of wool or fur
What happens when a charged rod contacts a neutral pith ball?
The ball assumes the same charge as the rod and is repelled
Why should airplanes and fuel trucks be grounded together before fueling?
To neutralize any charge of static electricity
What happens when a glass rod with excess electrons is held close to a suspended pith ball with a neutral charge?
The rod attracts the ball
What occurs when like charges are present on a glass rod and a pith ball?
They repel each other
What is the practical unit of measure for power?
Horsepower
In electrical terms, how many watts are equivalent to 1 horsepower?
746 watts
How is power defined in physics?
Time-rate of doing work
If a motor requires 1,657.8 watts to produce 2 horsepower, what is the motor's efficiency?
90%
What mathematical operation should be performed to find 'R' in the equation P = IE?
Division
To determine an unknown quantity in electricity, what should be covered with your thumb?
The symbol for current
Test your knowledge on the safety precautions for grounding an aircraft before fueling to prevent accidents. Learn about the importance of connecting the aircraft to the fuel truck to neutralize any electric charge and ensure safe operations.
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