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The power factor is at unity or 0%

The power factor is at unity or 100%

the rotor current is at its lowest value while still maintaining synchronism

The current draw of the motor stator is at its lowest value on the ammeter

the induced counter-emf is at its highest point in the rotor windings

The infinite bus is so powerful, it auto regulates all machinery once synchronized

The machine is drawing the active power from the three-phase line

The machine is operating off the residual magnetism of the field poles

The machine is drawing the reactive power from the three-phase line

The out-of-step relay will re-activate the excitation current

An angular shift between poles will create a stronger torque

The motor will just stop

The damper winding will keep the speed up until magnetic coupling is re-established

The circuit breaker will trip due to high induced current

Synchronous motors can't change direction of rotation

Exchange two phases of the three-phase input

Simply reverse the polarity of the rotor field windings

Interchange any two connections of the slip rings

The field coils will become stationary electromagnets

Too much torque being produced on start-up may snap the rotor shaft

It will limit the induced voltage in the amortisseur winding

The induced voltage may trip the circuit breaker

Molten steel is highly reactive with the gasses in the environment.

Cast steel products are unsuitable for machining and hot forming.

Steel has a high melting point.

Molten steel does not flow easily.

Casting does not bring out the good mechanical properties compared to other means such as hot forming processes such as forging and hot rolling.

Machining is needed to ensure a smooth surface and precision in location.

Machining should be kept to a minimal to save cost.

Cores can be used to reduce the amount of material removed during machining, saving on machining cost and material usage.

Casting usually leaves a slightly rough surface. For regions that do not interact with other parts, machining is not required.

The part need to be lightweight.

The part needs to be made out of metal.