1. In a few cases, industrial machines require power at slow speeds and high torque.
a. True
b. False
2. The gear motor is a speed-reducing motor.
a. True
b. False
3. A gear motor is larger than a low-speed standard motor of the same horsepower.
a. True
b. False
4. Gear motors are available in many of the standard motor types, but run only at constant speeds.
a. True
b. False
5. In gearing, as the output speed is decreased, the torque is increased.
a. True
b. False
Name: Class: Date:
Unit 53 Gear Motors
6. At speeds of 780 rpm and less, the following drives may be prudently used: chain drive, belt drive, separate speed
reducer coupled to the motor, or ____ motor.
a. multispeed b. synchronous
c. gear d. reverse
7. A gear motor usually consists of a ____ AC or DC motor and a sealed gear train correctly engineered for the load.
a. complex b. very small
c. standard d. very large
8. One-unit gear motors are available with horsepower ratings ranging from approximately 1/6 hp to ____ hp.
a. 50 b. 100
c. 150 d. 200
9. For 24-hour operation under moderate shock conditions, or 8-hour operation under heavy shock conditions, you need
a ____ gear.
a. Class I b. Class II
c. Class III d. Class IV
10. Because the amount of power lost in gearing is very small, the multiple drive has essentially ____ horsepower.
a. low b. constant
c. high d. variable
Name: Class: Date:
Unit 53 Gear Motors