Deck 4: Electric Meters

Question 1

To obtain an ampere reading, you should clamp the jaws of the meter around two wires.

Answer 1

False

Question 2

The clamp-on meter uses the device being checked as the load to produce a magnetic field.

Answer 2

False

Question 3

An electric meter is a device used to measure some electrical characteristic of a circuit.

Answer 3

True

Question 4

The most common types of electrical meters used are the volt-ohm-milliammeter and the ____________________.

Question 5

When electrons flow through a conductor in an electric circuit, a(n) ____________________ is created around that conductor.

Question 6

What is the voltmeter used to measure? Why is this important?

Question 7

How do meters make use of magnetic fields?

Question 8

The differences among the various electric meters, except for digital meters, are not in the meter movements, but in the internal circuits of the meter and in how the magnetic fields are created.

Question 9

____________________ means that a particular circuit or component has a complete path for current to follow.

Question 10

How should you use a voltmeter when you do not know the voltage available to the equipment being worked on?

Question 11

The analog meter makes use of Ohm's law to measure and display the electrical characteristics of the circuit.

Question 12

The three electrical characteristics of a circuit that are most important to industry technicians are ____________________, amperes, and ohms.

Question 13

The ____________________ uses a resistor as a load to produce a magnetic field when voltage is applied to the circuit in the meter.

Question 14

There are two types of ammeters used in the industry today: the clamp-on ammeter and the ____________________.

Question 15

Explain the purposes for which the ohmmeter is used.

Question 16

Explain how the design of a voltmeter differs from an ammeter.

Question 17

The ____________________ has its own power supply and uses the device being checked as the load to produce a magnetic field.

Question 18

Most electric meters are capable of reading more than one electrical characteristic.

Question 19

What will happen if a compass is suspended next to a conductor that is not carrying an electron flow?

Question 20

Explain the role of a service technician in refrigeration, heating, and air-conditioning. Why must a service technician be able to read and use all types of electric meters?