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(Generals)Basic Electricity II-A1-MC(Basics) > AS113-4 Course Review > Flashcards

AS113-4 Course Review Flashcards

1
Q

What is a battery?

A

A Device that convert chemical energy into electrical Energy

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2
Q

Name the two types of cells of a battery.

A

Primary cell Dry
Secondary cell Wet

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3
Q

What would the hydrometer reading be for a fully charge lead-acid battery? __________

A

1.275 or 1.3

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4
Q

During an installation of a battery into an aircraft, when should the negative terminal be connected?

A

Second after the positive lead

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5
Q

What is “deep cycling” or equalization of a battery?

A

Continue to discharge the battery but at a slower rate

When cells voltage gets to .2VDC per cell, short the cells with shorting strips

Leave straps on 3 to 8 hours

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6
Q

What will a measured discharge test tell the mechanic?

A

The state of the battery

Capacity of a Nickel Cadmium Battery

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7
Q

How do you check the state of charge for a lead-acid battery? _________________

A

Hydrometer

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8
Q

What happens to the electrolyte in a lead acid battery during discharge?

A

Dilutes

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9
Q

What is used to check specific gravity of a lead acid battery?

A

Hydrometer

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10
Q

How many volts per cell are in a NiCad battery?

A

1.5 to 1.8

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11
Q

How many volts per cell are in a lead acid battery?

A

2.1

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12
Q

What are two ratings found on aircraft batteries?

A

Voltage
Ampere Hour capacity rating

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13
Q

What is used to neutralize a NiCad battery’s electrolyte?

A

Boric Acid and Vinegar

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14
Q

What is used to neutralize a lead acid battery’s electrolyte?

A

Sodium Bicarbonate

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15
Q

If batteries are connected in parallel with each other, what increases?

A

Amps / Capacity

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16
Q

What is one complete sequence from zero to positive peak to zero, then to negative peak and back to zero?

A

Cycle

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17
Q

What is the definition of frequency?

A

of cycles in 1 sec, measured in Hz

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18
Q

What is another name for RMS Value?

A

Effective Value

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19
Q

What is the power factor of a purely resistive circuit?

A

1

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20
Q

What is the phase angle when current and voltage are in phase?

A

0

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21
Q

What is the power factor when current and voltage are in phase?

A

1

22
Q

What is the power factor of a purely capacitive circuit?

A

0

23
Q

What value does a meter read when measuring AC?

A

RMS

24
Q

In an AC circuit, effective value is always (greater or less) than peak?

A

Less

25
Q

True power will never be (greater or less) than apparent power?

A

Greater

26
Q

Looking at the frequency formula, what factors affect output frequency? _

A

of poles and RPM

27
Q

An inductor is defined as:

A

A coil of wire.
Changes the values of alternating current and voltage

28
Q

What letter is used to represent inductance?

A

L

29
Q

What four factors affect the inductance of a coil?

A

Type of core

Size of wire

Number windings

Spacing and shape in coil

30
Q

Inductive reactance is defined as:

A

The opposition to AC current flow that is caused by the presence of an inductor in the circuit

31
Q

What does current do with respect to voltage in an inductive circuit?

A

Lags

32
Q

What happens to inductive reactance if frequency is increased?

A

increases

33
Q

Transformers work off of what electrical principle?

A

Mutual Inductance

34
Q

If a transformer has a 10:1 turns ratio with an input of 28 volts and 1 amp, what will the output be?

A

2.8 V, 10 Amps

35
Q

What type of transformer is in the question above?

A

Step Down

36
Q

A capacitor is defined as:

A

A device used to store electrical energy in the form of electro static fields.

A capacitor is essentially two conductors separated by an insulator

37
Q

How does a capacitor store electrical energy?

A

Electrostatic Fields

38
Q
A
39
Q

What letter is used to represent capacitance?

A

C

40
Q

What three factors affect the capacitance of a capacitor?

A

Area of plates
Separation between plates
Composition of dielectric

41
Q

What are two ratings found on capacitors?

A

Capacitance
Voltage

42
Q

What does the working voltage of a capacitor have to be compared to the applied voltage?

A

50% higher than the highest voltage

43
Q

What dielectric does a self healing capacitor have?

A

Oil

44
Q

Capacitive reactance is defined as:

A

Opposition offered by a capacitor to the flow of alternating current though it

45
Q

What does current do with respect to voltage in a capacitive circuit?

A

Leads

46
Q

What happens to capacitive reactance if frequency is increased?

A

Decreases

47
Q

Impedance is defined as:

A

measure of the opposition to electricity flow

48
Q

What is the name of a device that changes AC into DC?

A

Rectifier

49
Q

What happens when a capacitor is placed into a rectifier circuit?

A

Smooths out the voltage

50
Q

Resonant frequency is defined as:

A

Frequency at which the inductive and capacitive reactance are the same

(Generals)Basic Electricity II-A1-MC(Basics) (10 decks)

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