1. Machinery clutches were originally designed to engage very large motors to their loads after the motors had reached
running speeds.
a. True
b. False
2. The single-face clutch consists of two discs.
a. True
b. False
3. Double-face clutches are available in sizes up to 60 inches in diameter.
a. True
b. False
4. The magnetic drive can be used as a clutch.
a. True
b. False
5. A tachometer generator generates a voltage that is exponentially related to its speed.
a. True
b. False
Name: Class: Date:
Unit 56 Magnetic Clutch and Magnetic Drive
6. When starting conditions are severe, a clutch inserted between the motor and the load means that ____.
a. an operator does not have to be present
b. power to the motor can be interrupted
c. the motor can run within its load capacity
d. larger shaft sizes are needed for the output side
7. In a double-face clutch, both the armature and ____ are mounted on a single hub with a double-faced friction lining
supported between them.
a. crossbar b. field discs
c. stator d. rotor
8. The magnetic drive couples the motor to the ____ magnetically.
a. power supply b. line
c. shield d. load
9. The electromagnetic coupling is one of the simpler ways to obtain an adjustable ____ speed.
a. output b. constant
c. input d. highest
10. Magnetic drives are used for applications requiring a(n) ____ speed such as cranes, hoists, fans, compressors, and
pumps.
a. high b. constant
c. input d. adjustable
Name: Class: Date:
Unit 56 Magnetic Clutch and Magnetic Drive