When steel wool is used to clean copper tubing, it should be _____
A) No. 00 B) No. 01 C) No. 02 D) No. 03
A
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When are seals without garter springs used?
What will be an ideal response?
Which of the following is a factor that causes the magnetic field of a three-phase motor to rotate?
a. The voltages of a three-phase system are 90 degrees out of phase with each other. b. The three voltages change polarity at regular intervals. c. The pole pieces are wound such that they will always have the same magnetic polarities. d. The stator windings are arranged around the outside of the motor.
La cantidad de gajos de una cabeza está determinada por ____.
a. un cuadro b. la división del diámetro por el ancho del gajo que con mayor facilidad se instale c. la multiplicación del diámetro por pi d. la división de la circunferencia por el ancho del gajo que con mayor facilidad se instale
Intake and exhaust valves are made of the same materials.
Answer the following statement true (T) or false (F)