Transformers Level 1 Study Guide questions and answers

Transformers Level 1 Study Guide
questions and answers
What was the primary transmission line problem that led up to a sequence of events that
eventually caused the East Coast power blackout on August 14, 2003?




a.

A car accident caused a transmission line to fall.




b.

A wind storm caused multiple transmission poles to break.




c.

An overhead transmission line became overheated and sagged, shorting to ground when it came
into contact with a tree.




d.

None of the above. ✔✔An overhead transmission line became overheated and sagged, shorting
to ground when it came into contact with a tree.




A(n) ? is a machine that converts mechanical energy into electrical energy by means of
electromagnetic induction.

,a.

electrical transmitter




b.

generator




c.

motor drive




d.

transformer ✔✔generator




Which factors determine the amount of voltage produced by a generator?




I. The number of turns

II. The speed of rotation of the rotor

III. The strength of the magnetic field

IV. The load on the generator ✔✔I., II., and III.




A stronger magnetic field, more turns, and faster rotation produce a higher voltage from a
generator.

, True or False ✔✔True




? is a method of synchronizing generators.




a.

Chaining




b.

Lights-out




c.

Marking




d.

Phase-timing ✔✔Lights-out




Utilities normally generate ? .




a.

single-phase AC power