AC theory III Review

Question 1

How is Power factor defined/Solved when in series?

Answer 1

Resistance divided by Impedance

Question 2

How is Power factor defined? In terms of SohCahToa?

Answer 2

CoSine of angle Theta

Question 3

In what unit is Apparent Power expressed in?

Answer 3

VA - Volt-Amperes

Question 4

In what unit is True power expressed in?

Answer 4

W - Watts

Question 5

What is the Megaohmeter(AKA Megger) used to test for?

Answer 5

Insulation breakdown

Question 6

What does an ohmmeter test for?

Answer 6

Resistance

Question 7

The MIN/MAX mode on a digital multimeter is used for recording what?

Answer 7

Current, temperature, and Voltage

Question 8

What is the international unit for Frequency?

Answer 8

Hertz(Hz)

Question 9

How many times more should the real-time bandwidth rating of an Oscilloscope be of the Frequency it is testing.

Answer 9

Two Times

Question 10

What does a Signal generator do?

Answer 10

Provides a known input signal to a circuit for test purposes.

Question 11

What is a Digital Logic Probe?

Answer 11

A Type of DC Voltmeter

Question 12

What are NPN, PNP, and silicon controlled rectifiers?

Answer 12

They are all Solid state DC switching devices

Question 13

In DC generators, what is used to convert generated AC power into DC output voltage?

Answer 13

Commutator

Question 14

What is the name of the rotating member of a DC Generator?

Answer 14

The Armature

Question 15

In which system, Delta or Wye, is the line voltage parallel to the phase voltage?

Answer 15

Delta

Question 16

When looking at the display for an Oscilloscope, what do the two planes represent?

Answer 16

X = Time
Y = Amplitude(Current or Voltage)

Question 17

What is the formula for frequency?

Answer 17

F = (S*P)/120

F = Frequency
S = RPM
P = # of Poles
120 = Constant