National Elevator Industry Educational Program 425 Key Terms And Correct Answers
A self-excited generator - ans20. Which of the following is a generator that relies on residual magnetism in its
pole pieces for initial excitation?
An external power source - ansIn a separately-excited generator, where does field excitation current come
from?
By varying the field or armature voltage - ans11. How is motor speed changed?
Compound - ans12. What type of generator uses two fields?
Current flows only when there is a load - ans5. In a DC series generator
Current must pass through it - ansHow is a magnetic field produced in a field coil?
Field strength - ans19. The speed of a DC motor depends on armature voltage and
It is self-excited - ans14. Which is correct about an exciter field circuit?
Its output drops as load is increased - ans8. Which of the following is correct about a shunt generator?
Over - ans7. An elevator that travels faster in the up direction when it is fully loaded than it does when it is
empty is ________________-compounded
Series field shunt - ans10. What is the generator series field connected in parallel with?
Suicide - ans17. What circuit is used for preventing build-up of circulating current when the generator field is
de-energized?
A self-excited generator - ans20. Which of the following is a generator that relies on residual magnetism in its
pole pieces for initial excitation?
An external power source - ansIn a separately-excited generator, where does field excitation current come
from?
By varying the field or armature voltage - ans11. How is motor speed changed?
Compound - ans12. What type of generator uses two fields?
Current flows only when there is a load - ans5. In a DC series generator
Current must pass through it - ansHow is a magnetic field produced in a field coil?
Field strength - ans19. The speed of a DC motor depends on armature voltage and
It is self-excited - ans14. Which is correct about an exciter field circuit?
Its output drops as load is increased - ans8. Which of the following is correct about a shunt generator?
Over - ans7. An elevator that travels faster in the up direction when it is fully loaded than it does when it is
empty is ________________-compounded
Series field shunt - ans10. What is the generator series field connected in parallel with?
Suicide - ans17. What circuit is used for preventing build-up of circulating current when the generator field is
de-energized?
