ECT002 Flashcards
Which equipment is essential for capturing and decoding FM radio signals for playback?
Transmitter
Antenna
Receiver
Amplifier
Receiver
Which scenario best exemplifies the conversion of potential energy into electrical power?
A geothermal plant utilizing heat from the Earth’s interior.
A hydroelectric dam converting the potential energy of water into electricity.
Solar panels converting sunlight into electricity.
A wind farm harvesting kinetic energy from the atmosphere.
A hydroelectric dam converting the potential energy of water into electricity.
What are the two primary types of optical fibers based on the number of paths for light propagation?
Unidirectional and Bidirectional
Reflective and Transmissive
Glass and Plastic
Single-mode and Multi-mode
Single-mode and Multi-mode
What type of fuel source is often used in portable household generators?
Solar energy
Coal
Diesel
Natural gas
Diesel
What device is responsible for converting direct current (DC) electricity produced by solar panels into usable alternating current (AC)?
Inverter.
Solar regulator.
Battery.
Generator.
Inverter
What is the purpose of a power supply interlock?
To shut down the unit if it becomes too hot
To ensure that dangerous voltages are
removed if the cabinet is opened
To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
To shut off the power supply if too much voltage is produced
To ensure that dangerous voltages are
removed if the cabinet is opened
How does a generator in a wind turbine or a hydroelectric dam produce electrical power?
They use sound waves to generate electrical power.
It converts chemical energy into electricity.
Electromagnetic induction generates electricity.
Generators rely on nuclear fission to create energy.
Electromagnetic induction generates electricity.
When refueling a generator, what is an important safety practice?
Refueling while the generator is running
Refueling with the recommended fuel type
Using any available fuel source
Filling the fuel tank to the brim
Refueling with the recommended fuel type
If a transformer has an efficiency of 90% and an input power of 2000W, calculate the output power.
2200W
1900W
1800W
2100W
1800W
Under what circumstances is it safe to climb a tower without a helper or observer?
When no electrical work is being performed
When no mechanical work is being performed
Never
When the work being done is not more than 20 feet above the ground
Never
What type of core minimizes eddy current losses in transformers?
Copper Cores
Laminated Iron Cores
Solid Iron Cores
Air Cores
Laminated Iron Cores
How do soundbars enhance audio quality when connected to televisions or audio sources?
Soundbars utilize magnetic fields for sound improvement.
Soundbars generate radio waves to boost audio quality.
Soundbars use multiple speakers and audio processing to create a surround sound effect.
Soundbars emit ultrasonic waves for audio enhancement.
Soundbars use multiple speakers and audio processing to create a surround sound effect.
What type of motor is designed to produce motion in a straight line, as opposed to rotational motion, and is commonly used in applications like high-speed trains and CNC machines?
Linear motor
Universal motor
Induction motor
Hysteresis motor
Linear motor
In a DC motor, what is the process by which the direction of current flow in the armature winding is changed to maintain rotation?
Resonance
Synchronization
Commutation
Induction
Commutation
In fiber optics, what material is commonly used to create the core of an optical fiber?
Silver
Aluminum
Copper
Glass or Plastic
Glass and plastic
