Understanding Single-Phase Motors

What is the main function of the centrifugal switch in a split-phase motor?

• To increase the starting torque

• To cut out the low-rated start winding

• To change the direction of the motor

• To maintain the split phase

In a capacitor start motor, what effect does the capacitor have on the motor's starting process?

• It decreases the starting torque

• It creates a two-phase effect for starting

• It reduces the motor's speed

• It increases the motor's size

How is the direction of an A.c. single-phase motor changed?

• By changing the polarity on both run and start winding

• By changing the polarity on the run winding only

• By changing the polarity on the start winding only

• By using a centrifugal switch

What is the main limitation of split-phase motors?

• They are limited to small size applications

• They have a high starting torque

• They require a large capacitor

• They cannot change direction

At what speed does the centrifugal switch cut out the start winding in a capacitor start motor?

• 50% full speed

• 75% full speed

• 100% full speed

• 25% full speed

What is the role of the overload contact (OL) in these motors?

• To increase the motor's speed

• To protect the motor from overheating

• To change the motor's direction

• To maintain the split phase

Which type of motor uses two capacitors for its operation?

• Split-phase motor

• Capacitor start motor

• Capacitor-start/capacitor-run motor

• Induction motor

What is the primary benefit of maintaining a split phase in a capacitor-start/capacitor-run motor?

• Increased motor size

• Increased torque

• Reduced starting torque

• Decreased motor speed

What happens to the start winding in a capacitor start motor once the motor reaches 75% of its full speed?

• It continues to operate

• It is cut out by the centrifugal switch

• It reverses direction

• It increases the motor's speed

Which component is responsible for creating a larger split phase in a capacitor start motor?

• The overload contact

• The centrifugal switch

• The capacitor

• The run winding