Electromechanic

Which of the following is an advantage of electric current heating up objects?

• It limits the amount of electric current.

• It prevents overheating of devices.

• It helps in the functioning of electric water heaters.

• It can cause appliances to catch fire.

What is a potential drawback of electric current heating up objects?

• It can make devices more efficient.

• It makes devices more durable.

• It reduces the electric current flow.

• It can cause devices to overheat and catch fire.

What is the primary function of an electric fuse?

• To make devices more efficient.

• To reduce the electric current flow.

• To prevent devices from overheating by breaking the circuit.

• To increase the electric current.

Which materials are commonly used to make fuse wires?

• Plastic and rubber

• Zinc, copper, silver, or aluminium

• Iron and steel

• Gold and platinum

Why is the rest of the fuse switch made of non-combustible material?

• To make it more attractive

• To ensure it does not catch fire

• To increase its weight

• To make it more expensive

What happens when there is a heavy current in the circuit with a fuse?

• The fuse wire strengthens and continues the circuit.

• The fuse wire cools down.

• The fuse wire melts and breaks the circuit.

• The fuse wire changes color.

What is a disadvantage of traditional electric fuses?

• They increase the electric current.

• They cannot reform themselves once melted.

• They are too expensive.

• They are too large.

What is another name for Miniature Circuit Breakers (MCBs)?

• Current limiters

• Electric switches

• Automatic fuses

• Voltage regulators

How do MCBs function when there is excess current flow?

• They increase the current flow.

• They automatically switch off.

• They change the circuit path.

• They melt like traditional fuses.

What is an advantage of MCBs over traditional fuses?

• They require manual replacement.

• They automatically switch on when the current flow is normal.

• They are cheaper.

• They are larger in size.