DC Generator Vibrating-Type Voltage Regulator Quiz
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DC Generator Vibrating-Type Voltage Regulator Quiz

Created by
@FaultlessMarsh8570

Questions and Answers

What is the purpose of the solenoid in a vibrating-type voltage regulator?

To connect or disconnect the field rheostat based on voltage variations

Why does contact B open when the output voltage rises above a specific value?

To reduce field current

What is the function of the dashpot in a vibrating-type voltage regulator?

To dampen oscillations and prevent hunting

How does contact B influence the field current in the generator?

<p>By increasing the field resistance</p> Signup and view all the answers

Why does contact B close when the output voltage falls below a specific value?

<p>To short the field rheostat</p> Signup and view all the answers

What role does capacitor C play in a vibrating-type voltage regulator?

<p>To help eliminate sparking</p> Signup and view all the answers

What type of regulator is suitable for heavy-duty generator systems?

<p>Carbon-pile voltage regulator</p> Signup and view all the answers

Why can't vibrating-type regulators and three-unit regulators be used with generators that require high field current?

<p>They tend to pit or burn contacts due to large current flow</p> Signup and view all the answers

What is the regulating element in a carbon-pile voltage regulator made of?

<p>Carbon discs</p> Signup and view all the answers

In older aircraft DC generating systems, what type of generators were controlled by carbon-pile voltage regulators?

<p>Compound-wound generators</p> Signup and view all the answers

What keeps the carbon discs pressed together in a carbon-pile voltage regulator?

<p>Leaf springs</p> Signup and view all the answers

What makes the carbon pile in the carbon-pile voltage regulator derive its name?

<p>It contains a stack of carbon discs</p> Signup and view all the answers

What determines when C2 will open?

<p>The amount of load current</p> Signup and view all the answers

Why is it necessary to have a certain minimum value of load current?

<p>To vibrate the current limiter</p> Signup and view all the answers

What would happen if the reverse current cut-out relay was not used in the generator circuit?

<p>The generator would act as a motor</p> Signup and view all the answers

What happens when the cut relay is closed in the DC-generating system?

<p>The line contactor is energized</p> Signup and view all the answers

How does the magnetic field set up by the current flow through the Reverse Current Circuit Breaker (RCCR) affect the breaker contacts?

<p>Keeps them in closed position</p> Signup and view all the answers

How does reducing the output voltage affect the generator current?

<p>Reduces the generator current</p> Signup and view all the answers

What happens to the generator when a reverse current occurs due to a drop in its output during shutdown or failure?

<p>It goes offline</p> Signup and view all the answers

What triggers the action of the voltage regulator?

<p>Battery voltage</p> Signup and view all the answers

What happens when R2 is placed in series with the generator field?

<p>The generated voltage decreases</p> Signup and view all the answers

In what scenario will the reverse current circuit breaker remain closed?

<p>When the current magnitude is much lower than the trigger value</p> Signup and view all the answers

What purpose do the auxiliary contacts of the RCCR serve in the DC-generating system?

<p>Supply the generator shunt field circuit</p> Signup and view all the answers

Why is it essential to de-energize the line contactor during a generator shutdown?

<p>To take the generator offline</p> Signup and view all the answers

What happens when the APU generator is switched on according to the text?

<p>The ground power is disconnected from the bus system.</p> Signup and view all the answers

What is the purpose of an inverter in aircraft systems as mentioned in the text?

<p>To convert a portion of DC power to AC power.</p> Signup and view all the answers

What are the two basic types of inverters mentioned in the text?

<p>Rotary and static inverters.</p> Signup and view all the answers

What is the typical frequency at which inverters in aircraft systems supply current?

<p>$400$ Hz</p> Signup and view all the answers

How is a rotary inverter structured based on the text?

<p>It has a DC motor driving an alternator on the same shaft.</p> Signup and view all the answers

What voltage range is utilized as an input for inverters according to the text?

<p>$26$-$29$ V</p> Signup and view all the answers

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