Block IV Study Guide

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the reason of the constant flow of current in the same direction through the external circuit in a DC generator

• Commutator
• Field winding
• Slip rings
• Armature winding

Tags

NGSS.HS-PS3-5

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

What is the primary instrument to monitor immediately after fuel flow during the starting sequence of a turbine engine?

• Oil pressure gauge
• N1 gauge
• Fuel pressure gauge
• EGT gauge

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

Tags

NGSS.HS-PS2-5

"The number of cycles per second is a definition of frequency, and the standard unit measurement is _____."

• Watts

• Ohms

• Hertz

Tags

NGSS.HS-PS4-1

What are the factors that influence resistance in an electrical circuit?

• Voltage, current, and power
• Area, temperature, length, material

• Resistance, inductance, and capacitance
• Color, shape, and size

Apparent power is the power consumed by the entire circuit, including both resistance and reactance.

• Symbolized by letters AP and measured in Watts

• Sybolized by letter S and measured in Volt-Amps

• Less than true power

Microbiological growth is frequently found in which type of aircraft fuel?

• Avgas
• Jet B fuel
• Diesel fuel
• Jet A fuel

To measure resistance in a circuit, the circuit must be?

• placed in water
• measured with a voltmeter
• disconnected from any power source
• connected to a power source