Avionics AC Test Questions with Correct Answers Verified by Experts| Latest Update
Given a circuit with an inductor of 100 microH in series with a capacitor of .001nf, operating at
a frequency of 10MHZ. What is the net reactance? 9.63K Ohms-capacitive
The opposition to an AC current offered by a capacitor is known as? Capacitive reactance
Two coils are arranged so the all of the flux lines of one coil cut all of the turns of the other coil.
The ratio between these is known as what? Coefficient of coupling
Which section of an oscilloscope controls sweep? The horizontal controls
Transformers with the secondary voltage in phase with the primary are known as? Like-
wound transformers
What is the efficiency of a power transformer that has an output power of 950 watts and input
power of 1010 watts? 94.1%
Where can the graticule be found on an oscilloscope? Display
If the period of a sine wave is provided, how do you find frequency? Use 1/T as the equation
to find frequency
What is the basic unit of measurement for frequency? Cycles/second (Hertz)
What is the phase difference between 3 phases of AC? 120 degrees
The two configurations of three phase (polyphase) AC power are? Delta and Wye
, What is the frequency of a circuit whose time for one cycle is 700ms? 1.43 Hz
What does a coupling capacitor do? Blocks DC and Passes AC
What does a bypass capacitor do? Shunts AC to ground
How many degrees is 1 Radian equal to 57.3
How many Radians is 1 degree equal to? 0.017
The Cosine of an angle in a right triangle is found by taking the dividend of what two sides of
the right triangle? Adjacent/hypotenuse
When does peak amplitude in a cosine wave occur? 0.0 degrees
If you know the Power Factor (PF) of a series RLC circuit, how do you find the Phase Angle?
Cos-1(PF)
What is the secondary current of a 20:1 transformer if the primary current is 1.5 amps? 30
amps
What is the reactance of two parallel inductors, L1=10mH and L2=5mH, at a frequency of
100Hz? 2.09 Ohms
What is the reactance of two parallel capacitors, C1=10microF and C2=5microF, at a frequency
of 100Hz? 106.16 Ohms
What is the peak voltage: 120V RMS voltage at 60Hz? 169.7 volts
Given a circuit with an inductor of 100 microH in series with a capacitor of .001nf, operating at
a frequency of 10MHZ. What is the net reactance? 9.63K Ohms-capacitive
The opposition to an AC current offered by a capacitor is known as? Capacitive reactance
Two coils are arranged so the all of the flux lines of one coil cut all of the turns of the other coil.
The ratio between these is known as what? Coefficient of coupling
Which section of an oscilloscope controls sweep? The horizontal controls
Transformers with the secondary voltage in phase with the primary are known as? Like-
wound transformers
What is the efficiency of a power transformer that has an output power of 950 watts and input
power of 1010 watts? 94.1%
Where can the graticule be found on an oscilloscope? Display
If the period of a sine wave is provided, how do you find frequency? Use 1/T as the equation
to find frequency
What is the basic unit of measurement for frequency? Cycles/second (Hertz)
What is the phase difference between 3 phases of AC? 120 degrees
The two configurations of three phase (polyphase) AC power are? Delta and Wye
, What is the frequency of a circuit whose time for one cycle is 700ms? 1.43 Hz
What does a coupling capacitor do? Blocks DC and Passes AC
What does a bypass capacitor do? Shunts AC to ground
How many degrees is 1 Radian equal to 57.3
How many Radians is 1 degree equal to? 0.017
The Cosine of an angle in a right triangle is found by taking the dividend of what two sides of
the right triangle? Adjacent/hypotenuse
When does peak amplitude in a cosine wave occur? 0.0 degrees
If you know the Power Factor (PF) of a series RLC circuit, how do you find the Phase Angle?
Cos-1(PF)
What is the secondary current of a 20:1 transformer if the primary current is 1.5 amps? 30
amps
What is the reactance of two parallel inductors, L1=10mH and L2=5mH, at a frequency of
100Hz? 2.09 Ohms
What is the reactance of two parallel capacitors, C1=10microF and C2=5microF, at a frequency
of 100Hz? 106.16 Ohms
What is the peak voltage: 120V RMS voltage at 60Hz? 169.7 volts
