In addition to short circuits and sustained...

In addition to short circuits and sustained...

Question 1 of 270705eccefa4bacbc34ba4d482f1

In addition to short circuits and sustained overloads, in what other situation are fuses likely to blow?

Question 1 of 27070

Q

In addition to short circuits and sustained overloads, in what other situation are fuses likely to blow?

🔍 Key Concepts

• Causes of excess heat in electrical connections other than too much current through the circuit • The effect of contact resistance (good vs poor mechanical connection) on heating and fuse operation • How mechanical condition of fuse clips/holders can change circuit resistance over time

💭 Think About

• Think about what would happen if the fuse is not held tightly in its holder – how would that affect resistance and heat at the contact point? • Which option would realistically make the fuse less likely to blow, and which would make it more likely by creating a hot spot? • Consider which choice describes a condition that can develop in service due to vibration, corrosion, or wear and would lead to intermittent or poor contact.

✅ Before You Answer

• Identify which choices would increase local resistance and heating at the fuse connection. • Eliminate any choice that would normally make conductors run cooler, not hotter. • Focus on the option that describes a mechanical problem at the fuse holder that can cause arcing or hot spots even when current is normal.