Chapter 10 RIT

Which of the following is not a main concern in electrical installations?

• Electric shock

• Overcurrent

• Voltage drop

• Earth fault

What is the result of overcurrent in an electrical circuit?

• Reduced voltage

• Equipment damage

• Improved efficiency

• Lower power consumption

Which of the following describes overload current?

• Current caused by short-circuits

• Adding more loads than designed

• Faulty conductors touching

• Loss of ground connection

A fault current can result from which of the following?

• Overloading the circuit

• Two or more live conductors touching

• Reduced insulation in wires

• Grounding an appliance

Which of the following is NOT a type of overcurrent protective device?

• Fuse

• Circuit breaker

• Transformer

• Residual Current Protective Device (RCD)

What is the main purpose of a fuse in an electrical circuit?

• Increase the circuit voltage

• Carry overload current without damage

• Melt when the current exceeds a certain value

• Increase the circuit resistance

What material is typically used for the fuse wire?

• Copper

• Silver

• Aluminum

• Tinned copper

Which type of fuse is most prone to human error when replaced?

• Cartridge fuse

• Rewirable fuse

• HRC fuse

• Glass fuse

What is the key advantage of a cartridge fuse?

• Easy to repair

• Cheap to replace

• More accurate rating

• Low maintenance cost

Which of the following devices is an alternative to fuses and protects against both overload and short circuits?

• Circuit Breaker

• Transformer

• Capacitor

• Resistor