Electricity Quiz 1

Capacitors used for fuel tank probes use:

Air and fuel as its dielectric

One half of a cycle in which the voltage or current rises or falls from zero to a peak and back to zero.

Alteration

How is alternating current generated on the aircraft?

By the use of a rotary generator in which a coiled conductor rotates inside a magnetic field.

What is the unit of measurement for inductors?

Henrys

The basis for a transformer operation in the use of alternating current is mutual:

Inductance

What is the opposition offered by a coil to the flow of alternating current called?

Inductive reactance

What is used to filter or smooth out the pulsations in alternating current?

Inductor or choke

When installed in an AC circuit, which of the following components will cause current to lag voltage?

Inductors

The transfer of electrical energy from one conductor to another without the aid of electrical connections:

Is called mutual inductance

Which of the following statements are true advantages of alternating current?

It is easy to generate. It can use smaller conductors. It is easy to change current and voltage values.

What is one of the most common types of capacitors?

Paper capacitor

The time required for one cycle of events to occur.

Period

What happens to the current in a step up transformer with a ratio of 1 to 4.

The current will decrease and the voltage will increase.

In an AC circuit with no resistive phase lead or lag, which is true?

The effective voltage is always less than the peak voltage.

Which of the following statements is/are correct to define Inductance?

The magnetic field that is produced anytime current is flowing in a circuit. Inductance is the property of a coil or circuit which opposes any change in current. Inductance is the characteristic of an electrical conductor that opposes change in current flow. The electrical characteristics of a conductor which causes voltage to be produced when it is cut, or crossed, by lines of magnetic flux. ALL FOUR ARE CORRECT.

Which of the following statements is/are factors that affect the inductance of a coil?

The number of layers of windings in the coil. The type of material used in the core. The numbers of turns in a coil. The diameter of the coil. The coil length.

In a purely resistive circuit.

The voltage and current will be in phase.

What happens to the voltage in a step down transformer with a ratio of 5 to 1?

The voltage will decrease and the current will increase.

What are the letter symbols for inductive reactance?

XL

One complete sequence of voltage or current change from zero, through a positive kpeak, back to zero, through a negative peak, and back to zero again.

Cycle

The number of complete cycles which take place in one second.

Frequency

The wave form produced by a rotating generator.

Sine wave.