Motor Control Basics Quiz

Who invented the three-phase AC motor?

• Nikola Tesla

• Thomas Edison

• Michael Faraday

• James Watt

What was the initial solution to turn motors on and off?

• Toggle switch

• Circuit breaker

• Knife switch

• Contactor

What is the main component inside a contactor that creates a magnetic field?

• Metal bridge

• Armature

• Electromagnet

• Spring

What does an auxiliary contact provide in a motor control system?

• Additional power

• Status indication

• Increased safety

• Manual control

What is a common cause of a short circuit in motor wiring?

• Loose connections

• Water damage

• Phase-to-phase contact

• Overheating

What technology is used inside circuit breakers to prevent overcurrent?

• Electromagnet

• Bimetal strip

• Insulation

• Trip bar

What happens to the bimetal strip in a circuit breaker during an overload?

• It breaks

• It melts

• It contracts

• It bends

What is the term for the initial surge of current when a motor starts?

• Overload

• Inrush

• Continuous current

• Full load amps

What does an MCP stand for in motor protection?

• Motor Control Panel

• Manual Control Protector

• Motor Circuit Protector

• Magnetic Circuit Protector

What component is added to a contactor to protect a motor from overload?

• Circuit breaker

• Thermal protector

• Overload relay

• Auxiliary contact