Aux 1 Unit 14 Q2

1 / 10

What happens to a cartridge type fuse after it has operated (blown)?

D) It continues to conduct electricity even after blowing

B) It must be replaced, as it is a single-use protective device

A) It can be reset and used again

C) It automatically resets after a short period

2 / 10

What is the function of the metal end caps on a cartridge type fuse?

D) To act as additional conductors

A) To provide decoration

B) To facilitate easy installation and ensure a secure electrical connection within the fuse holder

C) To increase the fuse's resistance

3 / 10

Why does a fuse used in a motor circuit generally have a higher current rating than one used in a lighting circuit?

C) Lighting circuits require less protection.

A) Motors typically draw higher currents, especially during startup, and the fuse must be capable of handling these surges without blowing.

B) Motors always operate at lower currents.

D) Motor circuits do not require fuses.

4 / 10

Why is a cartridge type fuse typically enclosed in a ceramic or glass tube?

B) To provide insulation and containment of the arc and molten metal when the fuse operates, enhancing safety

A) To reduce the cost of the fuse

C) To increase the circuit's resistance

D) To allow the fuse to be reused multiple times

5 / 10

What is the primary advantage of using a cartridge type fuse over a traditional fuse with a glass envelope?

C) The cartridge type fuse is more expensive.

B) The cartridge type fuse is reusable.

D) The cartridge type fuse allows the circuit to continue operating even after blowing.

A) The cartridge type fuse can handle higher voltage and current ratings due to its robust construction and better arc containment.

6 / 10

How does a cartridge type fuse protect an electrical circuit?

C) By increasing the circuit's voltage

A) By resetting itself automatically after a fault

D) By lowering the circuit's resistance

B) By interrupting the circuit when the internal metal wire or strip melts due to excessive current, thereby preventing damage to the circuit

7 / 10

In what type of applications are cartridge type fuses commonly used?

C) Only in high-voltage circuits

A) Only in low-voltage circuits

D) In circuits that require frequent resetting

B) In a wide range of applications, including household appliances, industrial machinery, and automotive systems, due to their reliability and safety

8 / 10

What characteristic is important for a fuse used in a motor circuit that is less critical in a lighting circuit?

D) The fuse must be invisible

B) Delayed or time-delay (slow-blow) characteristic to handle inrush currents without blowing

C) Ability to operate at low voltages

A) Fast-acting response to small current fluctuations

9 / 10

Why might a standard fast-acting fuse be more suitable for a lighting circuit compared to a motor circuit?

C) Lighting circuits have relatively stable and lower current demands, so a fast-acting fuse provides effective protection without the need for delay.

B) Lighting circuits operate at higher voltages.

D) Lighting circuits do not require fuses.

A) Lighting circuits have high inrush currents.

10 / 10

What is a cartridge type fuse primarily composed of?

C) A metal casing with a reset button

B) A cylindrical ceramic or glass tube containing a metal wire or strip that melts when excessive current flows through it

D) A rubber enclosure with metal spikes

A) A flexible plastic casing

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