Fuses Interview Questions:

Following are the below Fuses Interview Questions and Important Questions which is very useful for interviews and exams

1. What is meant by a fuse? What are the advantages of fuses? Name some of the commonly used materials as fuse element. Why silver is preferred as fuse element inspite of its higher cost ?

2. Explain the difference between fusing current and current carrying capacity of a fuse.

3. Name some important materials for fuse elements. Describe the essential requirements of a fuse material.

4. Discuss the different types of fuses in brief as used in electrical circuits.

5. Distinguish between fuse and circuit breaker. Discuss the advantages and disadvantages of a fuse. What are the desirable characteristics of fuse elements ? Why do we prefer silver as a fuse element ?

6. What are the different types of fuses? Discuss with a neat sketch the construction and working principle of a HRC fuse. State the advantages and disadvantages of it over other types of fuses.

7. Silver, inspite of its high cost is used as a fuse element in a HRC fuse, explain why ? What are the purposes of using quartz and as filler material in the construction of HRC fuse ?

8. What is a HRC fuse ? Explain its construction and operation. Also mention its applications.

9. Descnbe the construction and operation of a HRC cartridge fuse. What are its advantages and disadvantages ?

10. Explain the following terms in connection with a fuse: (i) rated current. (ii) fusing factor.

11. What do you mean by discrimination ? Discuss discrimination between a fuse and an overcurrent relay.

12. With a neat sketch explain the principle of operation of a HRC fuse. Name at least two application areas of such a fuse. Is there any better type of fuse as compared to HRC fuses available in the market ? What is drop-out fuse ?

13. Explain in brief the princip of working of low voltage HRC cartridge fuse. How can this fuse ease the duty on circuit breakers ?

14. Describe the construction and operation of the HRC cartridge fuse. What are its advantages and disadvantages ? What are considerations in selecting a fuse for (i) transformer protection (it) motor protection (iii) capacitor protection (iv) heaters (v) lighting loads ?

15. What do you mean by discrimination ? Discuss discrimination between (i) two fuses; (ii) a fuse and an overcurrent relay.

16. In relation to a fuse, explain what do you mean by (i) prospective current (ii) cut-off current and (iii) time-delay fuse. Give the advantages of HRC fuses.

17. Describe the HRC fuse with a tripping device with a neat sketch. State its advantages over an HRC fuse without tripping device.

18. Write short notes on the following :

• Time-current characteristic of a fuse.
• Fuse element materials.
• HRC fuses.
• HRC fuse with tripping device.
• High voltage fuse.
• Short-circuit protection using HRC fuses.