Quiz 2 Flashcards
When do the two rectifier diodes in a Full-Wave Rectifier let current through?
One lets through positive alteration, the other negative alteration
How do you prevent Electrostatic Discharge (ESD)?
Grounding hand tools, work bench and body (wrist straps)
What are some causes of ESD?
Dry conditions (0-20% humidity rate)
How many time constants does it take for capacitor to be approximately 100% fully charged?
5
What percent of the applied voltage will the capacitor be at after one time constant?
0.632
Current of 50 milliamps can cause what?
Asphyxiation/Suffocation Heart failure
What damage can be caused to the human body by radar waves?
Heat damage to internal organs without external indications
Which is the safest way to use a wrench, by pushing or pulling?
Pulling
Is it ok to use the single strand safety wire method for electrical connections?
Yes
When the J-K flip-flop input is triggered in toggle mode, what is the output frequency?
Half of the input
What rate of humidity is conducive for the creation of ESD conditions?
0-20%
What is a typical EVR circuit?
Adjustable Electronic Voltage Regulator
What is the most common type of fuselage design?
Semi-monocoque
What is 250,000 written in scientific notation?
2.5 x 10^5
ESD is negligible provided what condition exists?
All electrical/electronic structures are properly bonded
A transistor that acts as an open or is in cut-off means Vce=Vcc.
True
Where is the outer shield of a coaxial cable grounded?
At the source or Input edge (powered end)
In scientific notation, what is a coefficient of a number?
A number multiplied by itself a specified number of times
What flight control allows the aircraft to roll?
Aileron
What is hysteresis?
Magnetic field lagging the change of polarity
What is the most commonly used flip-flop?
J-K
If a step up transformer has a secondary voltage of 600V, and the primary has 28V, 100 turns, and 5.5 amps, how many turns are needed in the secondary and how many amps are produced?
2143 turns and 257 mA
What type of corrosion has a white powder type look to it?
Pitting
What will a DMM read if a fuse is broken?
Infinite resistance/”OL”
What is Kirchhoff’s voltage law?
Sum of voltage drops equals applied voltage
Is Hysteresis loss greater at higher or lower frequency?
Higher
What ohmic value of impedance are aviation transmission lines?
50 Ohms
What principle do transformers operate on?
Mutual Inductance
If lamp A and lamp B are connected in parallel to a 30V source, what is the voltage across lamp A and lamp B?
30V on both
If the fourth band on a resistor is silver, what is the tolerance?
0.1
What happens if you connect the diodes backwards in a full wave bridge rectifier?
Polarity will be reversed
When reading the resistance of a discharged capacitor it reads a constant 40 ohms. What is the problem?
Leaky capacitor
If the secondary winding of a transformer is partially shorted, what will the voltage be?
Lower than normal voltage
If the current in the diodes of an AC rectifier is reversed, what will happen to the output waveform?
Polarity is reversed
What is the “hand-rule” for magnetic induction in generators?
Left hand rule
What is the combination of a horizontal stabilizer and an elevator called?
Stabilator
If your output voltage is 0V when troubleshooting a circuit, what would you check input voltage with?
Voltmeter
Does the cross-section increase or decrease with a larger American Wire Gauge (AWG) number?
Decrease
What is the international symbol for current?
Capital letter “I”
If the volts across a capacitor is decreased, the stored voltage will?
Decrease
Is effective voltage in an AC circuit greater or less than the maximum instantaneous voltage?
Less than
If the capacitor value in a filter is increased, the AC ripple effect will:
Decrease
The gold color band is never used as the first number on a resistor?
True
If the forward bias is increased in an NPN transistor the resistance will?
Decrease
If the forward bias is decreased in an NPN transistor the conduction will?
Decrease
If you notice a person has a hearing injury or noise fatigue, what should you do first?
Remove them from the noisy area
What is the term for the outside shape or curvature of the wing?
Camber
What converts AC to DC?
Rectifiers
What happens to current in a Zener diode if voltage in the reverse bias direction is increased?
Increases gradually, then rapidly at breakdown point
What type of corrosion attacks the grain boundaries of metal?
Intergranular
