Power Transmission and lubrication Homework review

3. What voltage is used to supply pumps and other associated equipment?

220

25 .How often does the AC power supply change direction in the United States?

60 times per second

16. What gear would you use to transmit power smoothly through a low power range?

Bevel

26 .What is the most common way to manufacture electricity?

Burning fuels

13. Which of the following is an advantage of a chain?

Capable of operating in hostile environments

11. What is a mechanical device used to transfer rotational energy between two or more sprockets?

Chain

6. Which of the following is an electrical component that opens a circuit and stops the flow of electricity when the current reaches unsafe levels?

Circuit breaker

21. What are set to lubricate and cool rotating components?

Clean liquid purges

23. Noisy __________may also be an indication of potential problems.

Gearboxes

5. Which of the following characteristics are similar between AC and DC power?

Heating effect is the same.

17. What gear would you use in applications that require greater power (torque) and equipment size?

Helical

10. What type of belts are used when the equipment has higher horsepower or loading conditions?

High-capacity

27. What indicates contamination in the oil?

Milky appearance

7. Which of the following are enclosures that house the equipment for motor control?

Motor control centers

1. What is a measure of resistance in electrical circuits?

Ohm

4. Which of the following is a characteristic of DC power?

Polarity is fixed.

24. Which of the following is a task that process technicians may have to complete during the maintenance of power transmissions?

Record vibration levels /Switch oil coolers /Change oil /——All of the above

18. What type of lubricant returns the oil to a reservoir where filtration and cooling occur before redistribution back through the system?

Recycling

9. What type of couplings are used in applications where only small amounts of misalignment can be tolerated without damage to equipment or decreased performance?

Rigid

14. What type of bearings would you use in large equipment and at high speeds?

Sleeve

20. What type of lubricant uses a moving member?

Splash feed

12. What is a toothed wheel used in chain drives?

Sprocket

8. Which of the following is an electrical device used to start, stop, or otherwise reconfigure the flow of electricity in a circuit?

Switch

15. What type of bearings would you use to prevent axial movement of the shaft?

Thrust

22. What are often used to detect vibrations that are outside the normal range?

Vibration monitoring

2. What is the electromotive force, or a measure of current, that establishes a current of one amp through a resistance of one ohm?

Volt

19. What type of lubricant is similar to a drip feed oiler?

Wick feed

28.A rigid coupling is used:

in applications where small amounts of misalignment can be tolerated.