Quiz on Protection Systems

The primary function of a protection system is:

• Enhancing efficiency

• Protecting equipment and humans

• Increasing power generation

• Reducing system cost

Protection systems are designed to operate under:

• Normal conditions

• Fault conditions

• Both normal and fault conditions

• Only during maintenance

Which of the following is NOT a type of fault in electrical circuits?

• Short circuit

• Open circuit

• Power factor improvement

• Earth fault

Faults in electrical circuits can result in:

• Overheating and equipment damage

• Improved voltage levels

• Reduced current flow

• Increased efficiency

The time-current characteristic of a fuse determines its:

• Breaking capacity

• Speed of operation

• Cost

• Voltage rating

Which type of fuse can be reused after fault clearance?

• HRC fuse

• Cartridge fuse

• Rewirable fuse

• Thermal fuse

Isolators are primarily used for:

• Breaking current under load

• Protecting against overvoltage

• Isolating circuits during maintenance

• Measuring voltage and current

Re-striking voltage occurs:

• After the fault is cleared

• During the breaking of the circuit

• When the arc is fully extinguished

• Before the fault occurs

Resistance switching is used to:

• Reduce the voltage rating of the circuit breaker

• Avoid arcing during switching

• Control the rate of rise of re-striking voltage

• Improve the efficiency of fuses

Which circuit breaker is most suitable for high-voltage applications?

• Air Circuit Breaker (ACB)

• Oil Circuit Breaker (OCB)

• SF6 Circuit Breaker

• Miniature Circuit Breaker (MCB)