Electrical Grid 2 week 3

Why is it important for generators to rotate in unison in a power delivery system?

• To ensure synchronized power output and system stability

• To reduce mechanical wear and tear

• To increase the speed of power generation

• To minimize noise pollution

What happens if generators are not rotating in unison?

• The generators will produce more power.

• The generators will stop working.

• The generators will synchronize automatically.

• The generators will cause instability in the power grid.

If a unit experiences a mechanical problem, or if for any other reason a generator begins to lag or lead in rotation, what happens to the protective equipment?

• The protective equipment activates to protect the generator and automatically opens.

• The protective equipment deactivates.

• The protective equipment remains unaffected.

• The protective equipment signals an alarm.

True or False: Operators can separate the unit from the system when needed.

• True

• False

What are the two main parts of a three-phase induction motor?

• pulley and stator

• rotor and poles

• rotor and stator

• rotor and rator

When the A phase peaks, the magnetic field is maximized between which poles?

• A) A phase poles

• B) B phase poles

• C) C phase poles

• D) None of the above.

A change in the phase sequence affects the direction of motor rotation by:

• Reversing the direction of rotation

• Increasing the speed of rotation

• Decreasing the speed of rotation

• Having no effect on the rotation

Changing the phase sequence in electrical systems affects the rotation of:

• motors

• generators

• transformers

• all of the above

What happens if any two phases are reversed in a three-phase power system?

• would still be ok

• rotation stays the same

• rotation improves

• rotation will change

what is the importance of painting jumper connections on the ground near the pole location.

• To ensure that the jumpers would be reconnected correctly

• To improve electrical conductivity

• To prevent corrosion

• To reduce maintenance costs