​Harmonic problems generally involve _______________ of the transformer.

Connecting an ohmmeter to a live circuit usually results in damage to the meter.

A right triangle has a hypotenuse of 10 ft. and one angle of 30°. How long is the side opposite the angle?

A) 5 ft.
B) 8.67 ft.
C) 20 ft.
D) 50 ft.

In single-phase motors such as the resistance start induction-run motor, the start winding is disconnected by the _____.

A) centrifugal switch
B) disconnect switch
C) operator
D) overload switch

A two-branch parallel circuit has a 30 Ω and a 15 Ω resistor. What is the total resistance?

A) 2 Ω
B) 10 Ω
C) 45 Ω
D) 15 Ω

To calculate current flow through any branch of a circuit by substituting the values of I_X and R_X for the branch values when total circuit current and the resistance are known, use t he _______________ formula.

Rotors must be carefully __________ and ___________ to determine if they are fit to remain in service.