Unit 4 - Electrical Systems - Pre-test

What unit measures electrical potential difference?

• Ampere

• Watt

• Ohm

• Volt

Which term describes electrical current flow?

• Volt

• Ampere

• Ohm

• Hertz

Electrical resistance is measured in:

• Amps

• Watts

• Ohms

• Volts

The rate of alternating current oscillation is measured in:

• Joules

• Hertz

• Watts

• Volts

What is the function of an Electronic Speed Controller (ESC) in an RPA?

• Converts AC to DC

• Regulates motor speed

• Monitors GPS data

• Balances battery cells

Which component allows a receiver to operate from the main flight battery?

• Flight controller

• Battery eliminator circuit

• Telemetry module

• Altimeter

What is the main purpose of telemetry in an RPA?

• To improve GPS accuracy

• To transmit flight data to the ground station

• To control servo movement

• To charge onboard batteries

A fuse is designed to:

• Store energy

• Measure current

• Protect circuits from overload

• Boost voltage

Increasing propeller diameter or pitch will generally:

• Decrease current draw

• Have no effect on current draw

• Increase current draw

• Reverse motor direction

The “Kv” rating of a motor indicates:

• Voltage tolerance

• RPM per volt applied

• Current efficiency

• Motor resistance