Q.

Synchronous motors are not used 

• AIn power houses and substations in parallel to bus bars for pf correction 
• BIn factories having large number of induction motors and other power apparatus operating at lagging power factor for pf improvement 
• CFor driving electric trains cranes, machine tools and line shaft drives
• DFor driving continuously operating and constant speed equipment such as centrifugal pumps, fans blowers, ammonia and air compressors motor generator sets etc.