Electrical Meters

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Question 1

The most accurate reading on a analog meter is?

A	From the middle to the lower one third of the scale
B	In the middle of the scale
C	Below the middle of the scale
D	From the middle to the upper two thirds of the scale

Question 2

When using a digital meter that has the capability of displaying the proper scale to be used this is called?

A	Autoramping
B	Autoranging
C	Prescaling
D	Autoscaling

Question 3

The meter used to measure electrical pressure in a circuit is the?

A	Ammeter
B	Voltmeter
C	Ohmmeter
D	Wattmeter

Question 4

The meter used to measure the electrical current in a circuit is the?

A	Ammeter
B	Voltmeter
C	Ohmmeter
D	Wattmeter

Question 5

The meter used to measure the electrical resistance in a circuit is the?

A	Ammeter
B	Voltmeter
C	Ohmmeter
D	Wattmeter

Question 6

The meter used to measure electrical power in a circuit is the?

A	Ammeter
B	Voltmeter
C	Ohmmeter
D	Wattmeter

Question 7

When measuring voltage to a load the voltmeter must

A	Always be placed in series with the load
B	Always be placed in parallel with the load
C	Be in line with the switch controlling the load
D	Be used with the load disconnected

Question 8

When testing for voltage across the switch in a 120 volt system, what reading would be obtained if the switch was in the open position?

A	0 volts
B	60 volts
C	120 volts
D	240 volts

Question 9

When testing voltage across the switch in a 120 volt system, what reading would be obtained if the switch was in the closed position?

A	0 volts
B	60 volts
C	120 volts
D	240 volts

Question 10

A millivolt meter is made to measure

A	1,000 volts
B	1 volt
C	1/1,000th of a volt
D	1/100,000 of a volt

Question 11

A voltmeter should

A	Always be set to the lowest setting when measuring an unknown voltage
B	Always be set to the highest setting when measuring an unknown voltage
C	Be set to midscale when measuring an unknown voltage
D	Always be used with the power supply isolated from the circuit

Question 12

VOM stands for?

A	Volt, ohm, meter
B	Volt, ohm, megaohmeter
C	Volt, ohm, milliammeter
D	Volt, ohm, microammeter

Question 13

An ammeter must

A	Always be placed in series with a load
B	Always be placed in parallel with a load
C	Be in parallel with the switch controlling the load
D	Be used with the load disconnected

Question 14

When using a clamp on ammeter, a wire is coiled 10 times and the clamp on ammeter is placed around the coil of wire. What effect if any will this have on the amp reading?

A	The amperage reading will not be affected
B	The amperage will be multiplied by 10
C	The amperage will be divided by 10
D	The amperage will change depending on where the coil of wire is placed

Question 15

Which meter is more accurate?

A	The clamp on digital ammeter
B	The clamp on analog ammeter
C	The accuracy of the analog and digital are the same
D	The in line analog ammeter

Question 16

What is the purpose of the hold button located on a clamp on ammeter?

A	It automatically adjusts the meter scale
B	It retains the amperage reading
C	It keeps the meter on the amperage scale
D	It allows the meter to be suspended from the circuit being tested

Question 17

When using an ammeter

A	The circuit must always be disconnected
B	. The circuit must always be energized
C	The circuit must always be isolated
D	The component must always be isolated

Question 18

An ammeter should

A	Always be set on the lowest setting when working with an unknown amperage
B	Always be set on the highest setting when working with an unknown amperage
C	Never be used when working with an unknown amperage
D	Always be used after testing the voltage

Question 19

A clamp on ammeter must always measure the amperage by

A	Clamping on one wire
B	Clamping around two wires
C	Clamping around one wire and a ground
D	Clamping around the ground

Question 20

When measuring the resistance of a load, the ohmmeter must always

A	Be placed in series with the load
B	Be placed in parallel with the load
C	Be used with the load disconnected
D	Both B and C

Question 21

When measuring the resistance across a switch, what reading would be obtained if the switch is closed?

A	0 ohms
B	Measurable resistance
C	Infinite resistance
D	1 megaohm

Question 22

When measuring the resistance across a switch, what reading would be obtained if the switch were open?

A	0 ohms
B	Measurable resistance
C	Infinite resistance
D	1 megaohms

Question 23

Which meter has its own built in power supply?

A	Voltmeter
B	Ammeter
C	Ohmmeter
D	Wattmeter

Question 24

What meter must always be used with the power supply disconnected from the load?

A	Voltmeter
B	Ammeter
C	Ohmmeter
D	Wattmeter

Question 25

A wattmeter is used to measure?

A	The input power rating of a load
B	The output power rating of a load
C	The power factor input rating
D	The power factor output rating

Question 26

If a motor has a power factor rating of 85% and a voltage rating of 120 volts with an amperage of 10 amps, the power rating would be

A	1.1 kilowatts
B	1,000 watts
C	1.2 kilowatts
D	1,020 watts

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Electrical Meters

Electrical Meters

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