Block IV Study Guide

How is the state of charge of a lead-acid battery indicated?

• By measuring the specific gravity of the electrolyte or checking the voltage with a voltmeter.
• By listening to the sound the battery makes
• By shaking the battery

• By counting the number of cells in the battery

How can the direction of the lines of force be determined when the direction of current flow is known?

• Use the foot rule
• Use the middle finger rule
• Use the left-hand rule

The law of electromagnetic induction states that "the induced electromotive force (emf) in a closed loop of wire is"

• not affected by the rate of change of magnetic flux through the loop
• directly proportional to the rate of change of magnetic flux through a coil of wire

• inversely proportional to the rate of change of magnetic flux through the loop
• dependent on the resistance of the wire in the loop

Root Mean Square is also known as?

• Effective value

• Volts

• Volt/Amps

Resistor that varies current?

• Constant resistor
• Rheostat

• Stable resistor
• Unchanging resistor

What are the two general types of AC motors commonly used in aircraft systems?

• Induction motors and synchronous motors
• Single-phase motors and three-phase motors
• Brushless motors and brushed motors
• Direct current motors and stepper motors

Conventional Flow theory?

• Current flows from the negative terminal to the positive terminal in Conventional Flow theory.
• Current flows from the positive terminal to the negative terminal in Conventional Flow theory.

Zener diode?

• Zener diode is used for amplification purposes
• Zener diode only allows current to flow in one direction
• Zener diode is a type of diode that allows current to flow in both forward and reverse directions when a certain voltage threshold is reached.
• Zener diode is a type of resistor

8 µF capacitor is expressed?

• .008

• .00008

• .000008

• 800,000

Gains are basic functionality of all _____?

• Conductors

• Amplifiers

• Logic Gates