Answer the following statements true (T) or false (F)
1 Newton’s third law of motion states that for every action, there is a lesser but similar reaction.
2 Labyrinth seals are single-layer seals used to allow small amounts of leakage inside the turbine.
3 AC motors are the most common type of motor used in the process industries due to their simplicity.
4 Variable speed motors allow for the rotation speed of the motor to be adjusted.
5 Synchronous motors are the most common type of AC motor.
1 False. Newton’s third law of motion states that for every action there is an equal and opposite reaction. Typically, the reactive design is used on lower pressure fluids.
2 False. Labyrinths consist of multiple rings that create a long pathway
through which steam does not escape.
3 True.
4 True.
5 False. Three-phase, single-speed squirrel cage AC induction motors are by far the most common type in the process industry.
You might also like to view...
____ welds may be specified as performing a sealing function only, such as when fabricating tanks and other metal containers that must be leakproof.
A. Butt B. Edge C. Groove D. Joined
A 1Ø compressor (CSIR) has proper voltage, starts and runs for about 5 seconds, then goes out on overload. Which of the following is most likely the problem?
a. The start relay contacts are welded closed. b. The start relay contacts are stuck open. c. The start capacitor is bad. d. The compressor is locked up.
Illuminated entry systems turn on the courtesy lights after the doors are opened.
Answer the following statement true (T) or false (F)
Cats probably descended from the
A. Wolf B. African alley cat C. European bush cat D. African bush cat E. None of the above