T LEVEL ELECTROTECHNICAL SYSTEMS

What is the function of a protection device in an electrotechnical circuit?

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Answer explanation

The function of a protection device in an electrotechnical circuit is to safeguard the circuit from overloads, short circuits, and faults, ensuring safe operation and preventing damage to components.

Which component in an electrotechnical circuit is responsible for controlling the flow of electricity?

• Conductor (wire)

• Protection device (fuse)

• Control device (switch)

• Power source (battery)

Answer explanation

The control device (switch) is responsible for controlling the flow of electricity by opening or closing the circuit, allowing or stopping the current. Other components serve different functions but do not control the flow directly.

What is the role of the power source in an electrotechnical circuit?

• To protect the circuit

• To provide illumination

• To supply electrical energy

• To control the circuit

Answer explanation

The power source in an electrotechnical circuit is essential as it supplies electrical energy, enabling the circuit to function. Without it, the circuit would not operate, making this the correct choice.

What is the component called that provides AC or DC in an electrical circuit?

• Circuit protection

• Load

• Source of supply

• Circuit control

Answer explanation

The component that provides AC or DC in an electrical circuit is called the 'source of supply'. It is essential for delivering the necessary electrical energy to the circuit.

What is the purpose of a fuse or circuit breaker in an electrical circuit?

• To provide AC or DC

• To act as a load

• To control the circuit

• To provide circuit protection

Answer explanation

The purpose of a fuse or circuit breaker is to provide circuit protection by interrupting the flow of electricity in case of overload or short circuit, preventing damage to the circuit and connected devices.

What is the term for a device that needs current to operate in an electrical circuit?

• Circuit control

• Load

• Source of supply

• Circuit protection

Answer explanation

The term 'Load' refers to any device in an electrical circuit that requires current to function. It contrasts with other options like 'Source of supply' which provides current, but does not consume it.

What is the function of a switch in an electrical circuit?

• To provide circuit protection

• To act as a load

• To control the circuit

• To supply AC or DC

Answer explanation

The function of a switch in an electrical circuit is to control the circuit by opening or closing it, allowing or stopping the flow of electricity. This makes 'To control the circuit' the correct choice.

What are conductors embedded in a protective sheathing called?

• Load

• Circuit control

• Cable

• Source of supply

Answer explanation

Conductors embedded in protective sheathing are commonly referred to as 'cables'. This term encompasses various types of electrical cables used for transmitting power or signals.

What is an electrical power circuit used for?

• Distributing power for utilisation elsewhere

• Generating electricity

• Storing electrical energy

• Converting AC to DC

Answer explanation

An electrical power circuit primarily functions to distribute power for utilization elsewhere, allowing electricity to be delivered to various devices and systems. Other options like generating or storing energy are different processes.

What is the most common type of power circuit in installations?

• Radial circuit

• Ring final circuit

• Parallel circuit

• Series circuit

Answer explanation

The ring final circuit is the most common type of power circuit in installations. It allows for a continuous loop of wiring, providing multiple outlets while minimizing voltage drop and ensuring safety.