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ATT214 > Quiz 4 > Flashcards

Quiz 4 Flashcards

(72 cards)

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1
Q

If a short occurs in a parallel branch of a circuit what is the effect on total resistance (RT) and total current (IT)”

A

RT decreases to zero IT becomes infinite (∞)

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2
Q

If one branch of a parallel circuit shorts what portion of the circuit current will flow through the remaining branches”

A

None

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3
Q

What devices on an aircraft control surface provides sharp points from which a static charge can be dissipated from the aircraft into the atmosphere”

A

Static dischargers

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4
Q

Newton’s Third Law of motion is often called what”

A

The law of action and reaction

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5
Q

What type of stability for an airplane involves the tendency for the nose to pitch up or down rotating around the lateral axis”

A

Longitudinal stability

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6
Q

Which stability term represents a small amount of oscillation around both the longitudinal and vertical axes”

A

Dutch roll

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7
Q

The ailerons or the spoilers on a jet transport are types of flight controls or lateral control for what”

A

longitudinal axis

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8
Q

The rudder is a type of flight control for which axis of flight”

A

Vertical axis

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9
Q

The elevator attached to the horizontal stabilizer is a type of flight control for which axis of flight”

A

Lateral axis

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10
Q

Inductance is measure in”

A

Henries

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11
Q

Capacitance is measured in”

A

Farads

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12
Q

Resistance in a DC circuit is measured in”

A

Ohms

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13
Q

Impedance in an AC circuit is measured in”

A

Ohms

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14
Q

Current is measured in”

A

Amps

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15
Q

Electromotive Force (EMF) is measured in”

A

Volts

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16
Q

Inductive Reactance is measured in”

A

Ohms

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17
Q

Capacitive Reactance is measured in”

A

Ohms

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18
Q

True Power is measured in”

A

Watts

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19
Q

Apparent Power is measured in”

A

Volt-Amps

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20
Q

Reactive Power is measured in”

A

Volt-Amps Reactive

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21
Q

What electrical element/quantity remains the same through all components in a series circuit”

A

Current

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22
Q

What electrical element/quantity remains the same through all branches of a parallel circuit”

A

Voltage

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23
Q

What is the formula for finding total resistance in a series circuit”

A

RT = R1 + R2 +…+ Rn

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24
Q

What formula is used to find the total resistance of multiple resistors of the same value in parallel”

A

RT = R/n

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25
What formula is used to find the total resistance of two resistors of different values in parallel"
RT = (R1 x R2)/(R1 + R2)
26
What formula is used to find the total resistance of multiple (more than two) resistors of different values in parallel"
RT = 1/(1/R1 + 1/R2 +...+ 1/Rn)
27
In a series circuit the sum of all voltage drops is"
Equal to the source voltage
28
Who's "current law" states that for any node (junction) the sum of currents flowing into that node is equal to the sum of currents flowing out of that node"
Kirchhoff's Law
29
What is Impedance (Z)"
The opposition to the flow of current in an AC circuit
30
What is Reactance (X)"
The opposition to the flow of alternating current caused by capacitance or inductance
31
Which of the following causes opposition to the flow of alternating current in an inductor"
Reactance
32
Which of the following causes opposition to the flow of alternating current in a capacitor"
Reactance
33
How does a coil (inductor) react to AC"
As the frequency of the applied AC increases reactance increases
34
How does a capacitor react to AC"
As the frequency of the applied AC increases reactance decreases
35
What happens when the impedance of an electrical load is equal to the internal impedance of the power source"
The source delivers maximum power to the load
36
Why is impedance matching important"
So the source can deliver maximum power to the load
37
Why should core saturation of a conventional impedance matching transformer be avoided"
Harmonics and distortion could result
38
What is one reason for using an impedance matching transformer"
To maximize the transfer of power
39
Which of the following devices can be used for impedance matching at radio frequencies (RF)"
All of the above
40
Which of the following describes one method of impedance matching between two AC circuits"
Insert an LC network between the two circuits
41
In what type of circuit can current flow in two directions"
LC Parallel Resonant Circuit
42
What is the most common type of pliers used for aircraft safety wiring"
Wire twisters (Safety Wire Pliers)
43
A 2x (times-two) increase or decrease in power results in a change of how many dB"
3 dB
44
How does the total current relate to the individual currents in each branch of a parallel circuit"
It equals the sum of the currents through each individual branch
45
How many watts of electrical power are used if 400 Vdc is supplied to an 800Ω load"
200 W
46
How many watts of electrical power are used by a 12 Vdc light bulb that draws 200 mA"
2.4 W
47
What is the PEP (Peak-Effective-Power) of a transmitter if an oscilloscope measures 200 VPK-PK across a 50Ω dummy load connected to the transmitter output"
100 W
48
Which measurement of an AC signal is equivalent to a DC voltage of the same value"
RMS (Effective)
49
What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding"
Mutual Inductance
50
Where is the energy source normally connected to a transformer"
To the primary winding
51
What is the TOTAL current in the primary winding of a transformer called when a "No-load" condition exists on the secondary"
Magnetizing Current
52
What is the total resistance of three (3) 100Ω resistors in parallel"
33.3Ω
53
What is the voltage across a 500-turn secondary winding in a transformer if the primary has 2250 turns and is connected to 120 VAC"
26.7 V
54
What is the equivalent capacitance of two (2) 5000 pF capacitors and one (1) 750 picofarad capacitor connected in parallel"
10750 pF (10.75nF)
55
What is the total capacitance of three (3) 100µF capacitors connected in series"
33.3µF
56
What is the total inductance of three (3) 10mH inductors connected in parallel"
3.3mH
57
What is the total inductance of a 20mH inductor in series with a 50mH inductor"
70mH
58
What is the total capacitance of a 20µF capacitor in series with a 50µF capacitor"
14.3µF
59
What component should be added to a capacitor in a circuit to increase the total circuit capacitance"
A parallel capacitor
60
What component should be added to an inductor in a circuit to increase total circuit inductance"
A series inductor
61
If the output of a generator is 125V under "No-load" conditions and the output is 100V under "Full-load" conditions what is the percentage (%) of regulation"
0.25
62
The product of the readings measured on an AC voltmeter and AC ammeter is called what"
Apparent Power
63
What is the term used to express the amount of energy stored in an electrostatic field"
Joules
64
What device is used to store electrical energy in an electrostatic field"
Capacitor
65
What term is used to describe the out-of-phase power associated with inductors and capacitors"
Reactive Power
66
In an Aircraft Maintenance Manual (AMM) this describes tools or a procedure that makes the technician's job easier to perform"
Note
67
In an Aircraft Maintenance Manual (AMM) this applies where damage can occur if proper procedure isn't followed"
Caution
68
In an Aircraft Maintenance Manual (AMM) this identifies situations where severe injury or death may occur"
Warning
69
A _____ device holds energy isolation-devices in a safe or "off" position"
Lockout
70
What class of amplifier has output current flowing during the entire input signal cycle"
Class A
71
Which class of transistor amplifier provides the highest efficiency"
Class C
72
Which class of transistor amplifier is distinguished by the operating bias being set well beyond cutoff"
Class C

ATT214 (4 decks)

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