Electrical 02 Flashcards
What is conductivity?
a. It is what makes the material less conductive and is what most insulators do.
b. a material’s ability to conduct electric current. The material will have free electrons
c. a material’s ability to conduct electric current. There will be no free electrons
d. It is the materials ability to conduct electricity, it is proportional to resistivity.
b. a material’s ability to conduct electric current. The material will have free electrons
Select the conductors from the list.
a.Glass
b.Plastic
c.Rubber
d.Copper
e.Aluminium
f.Germanium
g.Silicon
h.Gold
d. Copper
e. Aluminium
h. Gold
What is required for DC current?
1.Any type of circuit and voltage as long as the impedance of the bus bars is low.
2.An open circuit and a DC generator
3.A constant EMF in one direction or a battery and a closed circuit.
4.A conductor with low resistance
- A constant EMF in one direction or a battery and a closed circuit.
What is a guarded switch used for?
1.It is used for any circuit where inadvertent operation would not be good.
2.It is used to protect the Captains circuits and prevent operation by other crew members.
3.It is used to ensure the radio cannot go into guard inadvertently.
4.It is used for fuel and electricity distribution switches
- It is used for any circuit where inadvertent operation would not be good.
In a modern Push-button or “Light-switch” what can it tell you?
1.It can only show whether the circuit is On, Off, Available or be unlit if abnormal.
2.It can show whether the circuit is On, Off, Faulty and will be unlit if abnormal.
3.It can show whether the circuit is On, Faulty or be unlit if normal.
4.It can show whether the circuit is On, Off, Faulty or be unlit if normal.
- It can show whether the circuit is On, Off, Faulty or be unlit if normal.
Which of the following statements in relation to the application of Ohm’s law is correct?
a.The current in a circuit is directly proportional to the resistance of the circuit
b.power in the circuit is inversely proportional to the square of the current
c.current in a circuit is directly proportional to the applied electromotive force
d.current in a circuit is inversely proportional to the electromotive force
c. current in a circuit is directly proportional to the applied electromotive force
A material with a Positive Temperature Coefficient of resistance;
a.Is one whose resistance will decrease with rising temperature and current would rise.
b.Is one whose resistance will decrease with decreasing temperature and current would drop.
c.Is one whose resistance will increase with rising temperature and current would drop.
d.Is one whose resistance will increase with rising temperature and current would rise.
c. Is one whose resistance will increase with rising temperature and current would drop.
Select the insulators from the list:
a.Silicon
b.Plastic
c.Gold
d.Copper
e.Glass
f.Germanium
g.Aluminium
h.Rubber
b. Plastic
e. Glass
h. Rubber
The letter commonly used to represent resistance is;
a. R and is expressed in Ohms
b. I and is expressed in Amperes
c. P and is expressed in Watts
d. V and is expressed in Volts
a. R and is expressed in Ohms
What and where is a static discharger?
a. A device for discharging electricity when needed. In the aircraft electrical system.
b. A device for removing static charge. It is in the flight deck.
c.It is a device for reducing the static charge of the aircraft and is mounted on the trailing edges.
d.A Wrestler in the Mexican Wrestling league.
c. It is a device for reducing the static charge of the aircraft and is mounted on the trailing edges.
What is DC current?
1.The flow of electrons in an open circuit in one direction.
2.The flow of Voltage in a closed circuit in one direction.
3.The flow of electrons in a closed circuit which alternates.
4.The flow of electrons in a closed circuit in one direction.
- The flow of electrons in a closed circuit in one direction.
Select the semi-conductors from the list.
a.Copper
b.Rubber
c.Glass
d.Silicon
e.Plastic
f.Germanium
g.Gold
h.Aluminium
d. Silicon
f. Germanium
When a quantity of Coulombs of electrons is flowing constantly through a load under the influence of an electromotive force it is defined as;
1.Power in Watts
2.Power in Amps
3.Current x resistance
4.Current in Watts
- Power in Watts
Electromagnetic Induction is caused by:
a.The motion of a conductor along a magnetic field or the field moving with a conductor.
b.The motion of a conductor across a magnetic field or the field moving through a conductor.
c.The application of electricity to a conductor.
d.The field across a capacitor.
b. The motion of a conductor across a magnetic field or the field moving through a conductor.
An electromagnetic field is only generated if what happens?
1.Resistance of the coil is low.
2.Voltage is applied to a coil
3.Current flows in the coil.
4.Frequency is high
- Current flows in the coil.
