Which of the following is true of shaded-pole motors?
a. They are small, inexpensive, and powerful.
b. They have a low starting torque, a low efficiency, and a high noise level.
c. They have a lower line current, are higher efficiency, and are very quiet.
d. They have a larger current, a lower total impedance, and a higher reactance.
b
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Many practitioners feel that a system, once compromised, can never be restored to a trusted state.
Answer the following statement true (T) or false (F)
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.
Supplementary angles
a. add together to equal 90 degrees b. add together to equal 180 degrees c. add together to equal 360 degrees e. None of the above
Si se usa madera en contacto con mampostería, debe ser _____.
a. fijada con epoxy b. tratada con presión c. separada mediante una base del piso impermeable d. fijada con clavos sin cabeza