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WorksheetsWeek 2 Review(Update)
Total questions: 18
Worksheet time: 9mins
Which unit is used to describe a capacitor’s capacity to store an electrical charge?
Ohm
Farad
Henry
If a radio circuit accidentally operates at its resonant frequency, what could occur?
Circuit current may rise sharply and damage components
The system voltage will drop to zero
The wire resistance will double
In an AC circuit, what term refers to the total opposition to current flow?
Reactance
Impedance
Resistance
Which standard unit is used to measure inductance?
Henry
Farad
Ohm
What is the effect of Counter Electromotive Force (CEMF) once a DC motor reaches operating speed?
It limits current flow and helps protect the motor
It continuously increases torque output
It raises voltage applied to the brushes
Which type of capacitor can store large energy but must be installed with correct polarity?
Electrolytic capacitor
Ceramic capacitor
Mica capacitor
Why are alternating current (AC) systems commonly used in aircraft?
AC voltage can be raised or lowered easily using transformers
AC current flows in one direction only, making it stable
AC systems do not require alternators
Which type of current can have its voltage efficiently altered by a transformer?
Alternating current (AC)
Direct current (DC)
Pulsed DC
Why might several capacitors be connected in series within an aircraft circuit?
To handle higher voltage while reducing total capacitance
To increase capacitance and lower voltage rating
To convert DC power into AC power
In a step-down transformer, why does the secondary winding carry more current than the primary?
Reduced voltage increases current to maintain equal power transfer
Extra windings lower total circuit resistance
Core losses cause additional current flow
What does frequency represent in an alternating current (AC) circuit?
The number of cycles completed per second
The highest voltage reached in one half-cycle
The number of loads connected to the source
What design feature in a transformer minimizes heat buildup from eddy currents?
Laminated iron core construction
Thicker copper wire windings
Fewer turns in the secondary coil
Which type of power in an AC circuit performs actual work, such as lighting or motor operation?
True power
Reactive power
Apparent power
What is the main function of the iron core in a transformer?
It provides a magnetic path linking the primary and secondary windings
It cools the transformer windings
It multiplies voltage between coils
Why do aircraft electrical systems use transformers?
To efficiently adjust AC voltage levels for various subsystems
To convert direct current into alternating current
To store electrical charge for later use
If a technician uses a peak voltage value instead of the RMS value in AC analysis, what will happen?
They will assume the circuit voltage is higher than it actually is
The reading will appear too low
There will be no difference in calculations
A transformer feels excessively hot despite normal current and voltage readings. What is the most likely cause?
Core losses caused by eddy currents or hysteresis
Insufficient load on the secondary
Open circuit in the primary winding
When inductors are connected in series, why does total inductance increase?
Each inductor adds its magnetic field effect to the others
The total current flow becomes zero
The inductors cancel one another’s magnetic effects
