What is the primary function of a Surge Protective Device (SPD)?

• Store excess energy

• Divert surge currents to ground

• Increase voltage stability

• Convert AC to DC

Which component in an SPD switches impedance to suppress surges?

• Fuse

• MOV

• Capacitor

• Resistor

Type 1 SPDs are typically installed:

• At outlets

• On the load side of the main panel

• Between the utility pole and service entrance

• Inside individual appliances

A Gas Discharge Tube (GDT) operates by:

• Absorbing surge energy

• Ionizing gas to conduct high voltage spikes

• Blocking current flow

• Regulating voltage

Which SPD type handles the lowest surge currents (3kA-10kA)?

• Type 1

• Type 2

• Type 3

• Type 4

Switchgear is primarily used to:

• Distribute power to multiple circuits

• Control, protect, and isolate electrical equipment

• Monitor power quality

• Convert voltage levels

High Voltage (HV) switchgear typically handles voltages above:

• 1 kV

• 35 kV

• 600 V

• 1000 V

Which component is NOT part of switchgear?

• Circuit breaker

• Busbar

• Frequency gauge

• Protective relay

Switchboards are designed for voltages up to:

• 600 V

• 33 kV

• 1 kV

• 350 kV

UL 1558 is a testing standard for:

• Switchboards

• Low-voltage switchgear

• SPDs

• Lightning rods