# Shared Flashcard Set

## Details

Basic Electricity-DME Oral
General ASA 20 Questions
20
Aviation
08/29/2015

Term
 What is inductance?
Definition
 Induced voltage which is opposite in direction to the applied voltage
Term
 What represents capacitance in AC circuits?
Definition
 Capacitor
Term
 Why should nickel-cadmium batteries and lead-acid batteries not be stored or serviced in the same area?
Definition
Term
 What is the most important law applicable to the study of electricity?
Definition
 Ohm's law
Term
 What causes opposition to the flow of applied current in an AC circuit?
Definition
 Inductive and capacitance reactance
Term
 What is the function of a capacitor?
Definition
 It serves as a reservoir or storehouse for electricity
Term
 What are the elements of Ohm's law?
Definition
 Voltage Current and Resistance
Term
 How many cells make up a lead-acid battery rated at 24 volts?
Definition
 12 cells at 2 volts each
Term
 How is Ohm's law expressed as an equation?
Definition
 Current=Voltage/Resistance Resistance=Voltage/Current and Voltage=Current X Resistance
Term
 What does an electrical circuit consist of?
Definition
 A source of electrical pressure. Resistance in the form of an energy-consuming device and conductors in the form of wires to provide electron flow
Term
 What unit is used to measure power in DC circuits?
Definition
 Watt
Term
 How many watts equal 1 kilowatt?
Definition
 1,000
Term
 What are 3 types of DC electrical circuits?
Definition
 Series, parallel and series parallel
Term
 What could cause a nickel-cadmium battery to fail to deliver its rated capacity?
Definition
 Cell imbalance or faulty cells
Term
 What current changes occur in a DC circuit when the applied voltage is increased and the resistance remains constant?
Definition
 The current increases
Term
 What functions will most multimeters perform?
Definition
 They read amperes, volts and ohm's
Term
 What are some advantages of AC circuits over DC circuits in aircraft?
Definition
 AC can be transmitted over long distances more readily and economically than DC. AC voltages can be increased or decreased by means of transformers
Term
 What should be the specific gravity of the electrolyte in a fully charged lead-acid battery?
Definition
 It should read between 1.275 and 1.300
Term
 What is the effect of temperature on specific gravity of the electrolyte when checking a lead-acid battery?
Definition
 Temperature changes the density of the electrolyte only when greater than 90 degrees F or less than 70 degrees F
Term
 Why is a specific gravity check of the electrolyte in a nickel-cadmium battery not acceptable to determine battery charge?
Definition
 There is no appreciable change in the specific gravity of the electrolyte during charge or discharge
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