Which of the following statements is FALSE in association with synchronous motor applications?

The correct answer is option 1.

Synchronous Motors

the given statements to determine which one is FALSE in the context of synchronous motor applications:

Synchronous motor is highly suitable for low power output below 40 kW in medium speed range.

This statement is generally FALSE. Synchronous motors are not typically used for low power applications, especially below 40 kW, because they tend to be more complex and costly compared to other types of motors, such as induction motors. Synchronous motors are better suited for higher power applications where precise speed control or power factor correction is necessary.
Voltage regulation can be done using synchronous motor.

This statement is TRUE. Synchronous motors can be used for voltage regulation in power systems. When operated at leading power factors, they can supply reactive power to the grid, helping to regulate voltage levels.
Synchronous motor is used in constant load drive application.

This statement is TRUE. Synchronous motors are ideal for constant load applications due to their ability to maintain a constant speed irrespective of load variations, provided they remain synchronized to the power frequency.
Synchronous motor is expensive in low power output application.

This statement is TRUE. Due to their construction, complexity, and maintenance requirements, synchronous motors tend to be more expensive than other types of motors like induction motors, especially for applications requiring low power output. This makes them less economical for such uses.
Based on the above analysis, statement 1 ("Synchronous motor is highly suitable for low power output below 40 kW in medium speed range") is the FALSE statement in association with synchronous motor applications. This is because synchronous motors are not typically recommended for low power applications due to their cost and complexity compared to more suitable alternatives like induction motors.