WorksheetsWeek 1 Review(Update)
Total questions: 23
Worksheet time: 12mins
What is the main function of the commutator in a DC motor?
To keep current flowing in the correct direction to produce continuous torque
To regulate voltage from the supply source
To convert mechanical motion into electrical energy
If resistance in a series circuit increases while voltage stays constant, what happens?
The total voltage rises
The current through the circuit decreases
The resistance has no effect on current flow
Why must technicians wear a grounding strap when working with aircraft electronic components?
To protect themselves from high-voltage shocks
To maintain wiring diagram accuracy
To prevent electrostatic discharge from damaging sensitive equipment
If a landing light fails to operate and both the bulb and power source are good, what should be checked next?
The relay that controls the lighting circuit
The wire insulation type
The nearby resistor color codes
When calculating total resistance in a series-parallel circuit, what is the correct first step?
Determine the equivalent resistance of all parallel branches first
Add all resistances in one calculation
Estimate resistance using a meter before solving
What would happen if a longer, thinner wire than specified were installed in an aircraft circuit?
The wire would heat up due to increased resistance
The current would rise above safe limits
The magnetic field strength would double
A 30-volt series circuit has three lamps. The first drops 14 volts, the second drops 10 volts. What voltage remains for the third lamp?
6 volts
8 volts
12 volts
Why should AMTs understand both conventional and electron current flow when reading diagrams?
To avoid confusion since diagrams may use either flow direction
To determine which theory is correct
To confirm electrons always move negative to positive
Why does a light appear dim in a circuit with a voltage drop?
Reduced voltage means less electrical pressure, lowering power output
The filament resistance increases
The current bypasses the lamp
Which current type is primarily used in modern commercial aircraft electrical systems?
Alternating current (AC)
Direct current (DC)
Pulsed current
In a parallel DC circuit, what happens to the voltage across each branch?
It remains the same across all branches
It decreases as more branches are added
It varies with resistance
How is total resistance calculated in a series DC circuit?
By adding together the resistance of each component
By dividing the highest resistance by the number of parts
By multiplying all resistor values
Which phrase best defines electric current?
The movement of electrical charge through a conductor
The strength of a magnetic field
The voltage between two points
What does Ohm’s Law describe?
The relationship between voltage, current, and resistance
The method for calculating electrical power
The direction of magnetic field lines
A technician suspects a broken wire but reads very low resistance through it. What does this indicate?
The wire is continuous and not actually broken
The multimeter battery is weak
The test leads are reversed
Which formula correctly expresses electrical power?
Power = I x E
Power = Resistance + Voltage
Power = Voltage + Resistance
According to Kirchhoff’s Current Law, what occurs at a junction point in a circuit?
The total current entering equals the total current leaving
More current exits than enters
Current is stored at the junction
In a series circuit, what should the total voltage drop across all resistors equal?
The total source voltage
The largest resistor’s voltage drop
The voltage across the first resistor only
What happens to the magnetic field around a wire when current increases?
The magnetic field strengthens and can influence nearby systems
The field weakens and disappears
The field instantly reverses direction
What is Electromotive Force (EMF)?
The electrical “push” that causes electrons to move
The resistance that limits current
The charge stored by a capacitor
If a resistor is replaced with one of the same color bands but the tolerance band is ignored, what might result?
The circuit might still work, but long-term reliability could be reduced
The resistor automatically adjusts its tolerance
The circuit will immediately fail
If resistance rises but voltage stays the same, what happens to the current?
The current decreases
The current increases
The current remains unchanged
A fuse rated for 10 amps is installed in a circuit. What happens if the current exceeds 10 amps?
The fuse opens to interrupt the circuit and prevent damage
The fuse slowly reduces current
The fuse allows current to keep flowing until reset
