1. The wiring of the accelerating starters and the design of the resistor sections are meant for speed regulation.
a. True
b. False
2. The operation of accelerating contactors is controlled by a timing device.
a. True
b. False
3. A wound rotor motor can be reversed by interchanging any two stator leads.
a. True
b. False
4. Accelerating timers may be used to control the acceleration of wound rotor motors.
a. True
b. False
5. Frequency relays have the advantage that an increase in motor load prolongs the starting time.
a. True
b. False
Name: Class: Date:
Unit 36 Automatic Acceleration for Wound Rotor Motors
6. The secondary resistance consists of banks of three uniform ____ sections.
a. X b. star
c. delta d. wye
7. Resistors on starters with three or more steps of acceleration limit the current inrush to ____ percent at the point of
initial acceleration.
a. 110 b. 130
c. 150 d. 170
8. The operation of a(n) ____ timer is based on the applied load.
a. accelerating b. compensated
c. driven d. TR
9. When a 60-hertz AC, wound rotor motor is accelerated, the frequency induced in the secondary circuit decreases
from 60 hertz at zero speed to ____ hertz at full speed.
a. 2 or 3 b. 4 or 5
c. 6 or 7 d. 8 or 9
10. Frequency relays have the advantage of ____.
a. being easy to replace b. a simple circuit
c. being nonrenewable d. slow response
Name: Class: Date:
Unit 36 Automatic Acceleration for Wound Rotor Motors