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13 Questions

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How much do you know about fuses?

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Questions and Answers

What is the main difference between current-limiting and non-current-limiting fuses?

Non-current-limiting fuses limit the duration of a fault but not its magnitude

Current-limiting fuses melt under the same circumstances as non-current-limiting fuses.

Non-current-limiting fuses limit the current in magnitude as well as duration.

Current-limiting fuses introduce resistance into the circuit, causing the current to stop rising and force quickly to zero. (correct)

What is the purpose of a fuse?

To increase the resistance in a circuit

To increase the current in a circuit

To decrease the voltage in a circuit

To break a circuit when current exceeds a given value for a sufficient time (correct)

What happens to the current in a circuit when a non-current-limiting fuse melts?

The current stops rising and is forced quickly to zero.

The current decreases gradually over time

The current continues to virtually the same peak as would occur if the fuse had not melted (correct)

The current increases exponentially.

What are the two main components of a fuse?

Fuse link and fuse holder Signup and view all the answers

What is the purpose of a current-limiting fuse?

To limit the current in magnitude as well as duration. Signup and view all the answers

What are the two types of fuses?

Low-voltage and high-voltage fuses Signup and view all the answers

Which type of low-voltage fuse includes semi-enclosed rewirable fuses and high rupturing capacity cartridge fuses?

Low-voltage fuses Signup and view all the answers

What are the three types of high-voltage fuses?

Explosion, drop-out, and liquid-quenched fuses Signup and view all the answers

What are the characteristics of the material used for fuse elements?

Low melting point, high conductivity, no oxidation, and low cost Signup and view all the answers

What is a satisfactory material for fuse wires?

Silver Signup and view all the answers

What are the various characteristics of fuses?

Rated current, minimum fusing current, fusing factor, prospective current, cut-off current, pre-arcing time, arcing time, total operating time, and rupturing capacity Signup and view all the answers

What is the formula for the heat generated by a fuse?

I2R Signup and view all the answers

Is a fuse required to pass an actual current equivalent to its rupturing or breaking capacity?

No Signup and view all the answers

Study Notes

A fuse is a device that breaks a circuit when current exceeds a given value for a sufficient time.
The fuse consists of a fuse holder and a fuse link.
Fuses may be classified into low-voltage and high-voltage fuses.
Low-voltage fuses include semi-enclosed rewirable fuses and high rupturing capacity cartridge fuses.
High-voltage fuses include expulsion, drop-out, and liquid-quenched fuses.
The material used for fuse elements should have low melting point, high conductivity, no oxidation, and low cost.
Silver is a satisfactory material for fuse wires.
Fuses have various characteristics such as rated current, minimum fusing current, fusing factor, prospective current, cut-off current, pre-arcing time, arcing time, total operating time, and rupturing capacity.
The heat generated by a fuse is proportional to I2Rt.
A fuse is never required to pass an actual current equivalent to its rupturing or breaking capacity.

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Description

Test your knowledge about fuses with this informative quiz! Learn about the different types of fuses, their classifications, and the materials used to make them. Explore the various characteristics of fuses and how they relate to their performance. See if you can answer questions about fuse heat generation and the importance of fusing current. Challenge yourself and become a fuse expert with this quiz!