C4 LT6

Question 1

What does a low battery symbol indicate to the user?

Answer 1

Internal battery needs replacement.

Question 2

How is analogue meter accuracy usually expressed?

Answer 2

Percentage of full-scale deflection

Question 3

What affects the accuracy of an analogue meter the most?

Answer 3

Value of voltage just below the scale

Question 4

What can cause false readings to be displayed on a DMM?

Answer 4

Impedance

Question 5

What does a negative or minus sign to the left of the reading indicate with autopolarity feature?

Answer 5

Lead polarity is reversed for DC measurements.

Question 6

How is DMM’s accuracy expressed?

Answer 6

Percentage of the actual meter reading

Question 7

What is the accuracy of a DMM with a stated accuracy of (1 % + 2), measuring a 20 V voltage?

Answer 7

19.6 - 20.4

Question 8

What may occur when conductors for a de-energized circuit are run in a conduit with energized conductors?

Answer 8

Capacitive coupling

Question 9

What does OL indicate on a digital multimeter?

Answer 9

Overload / Range too low for measurement

Question 10

What ranges are available for measurement on a DMM?

Answer 10

Voltage (AC and DC), current (AC and DC), resistance

Question 11

What special test positions might a digital multimeter have?

Answer 11

Beeper for continuity, diode testing feature

Question 12

What does the HOLD function in a DMM allow?

Answer 12

Save the measurement to be read later

Question 13

What indicators are present on the bar graph?

Answer 13

Polarity and overload

Question 14

What does the MIN MAX mode in some DMMs do?

Answer 14

Capture and store highest and lowest values

Question 15

What can improve the meter resolution?

Answer 15

Reducing range setting

Question 16

How can the DMM range setting be adjusted to increase resolution?

Answer 16

Closer but higher than expected voltage value

Question 17

In a 3-digit DMM with a meter range of 600V, what is the resolution?

Answer 17

1V

Question 18

What is the resolution in a 3-digit DMM with a meter range of 200V?

Answer 18

0.1V

Question 19

What could an analogue meter that is 1 percent accurate on the full-scale be out by on a 100-volt scale?

Answer 19

1 volt or 5 percent

Question 20

What issues can the recording mode be useful for troubleshooting in a circuit?

Answer 20

Low-voltage, high-voltage surge, circuit overloading

Question 21

What does autoranging do?

Answer 21

Automatically selects measurement range.

Question 22

What is the resolution in a 3-digit DMM with a meter range of 20V?

Answer 22

0.01V

Question 23

How does a DMM with high impedance affect circuit measurements?

Answer 23

No loading effect

Question 24

What happens to the display on a DMM when a high impedance meter is connected to a de-energized circuit?

Answer 24

Indicate some voltage present

Question 25

What is the purpose of manual ranging?

Answer 25

Lock into a specific range for repetitive measurements.

Question 26

In a 3-digit DMM with a meter range of 2V, what is the resolution?

Answer 26

0.001V

Question 27

How does a digital multimeter measure accuracy?

Answer 27

Percentage of actual signal + counts

Question 28

What is the purpose of a bar graph on a digital multimeter?

Answer 28

Indicate changes and trends in a circuit

Question 29

What is the resolution of a DMM with a 3-digit or 2000-count display set at the 200 volt range?

Answer 29

0.1

Question 30

How are the units of measurement determined on a digital multimeter?

Answer 30

According to the range switch setting

Question 31

What is the accuracy of the same DMM measuring a 20 V voltage, but set on the 20-volt scale?

Answer 31

19.78 - 20.22

Question 32

What do you need to do to measure a higher voltage value on a DMM?

Answer 32

Switch the range selector switch to a higher voltage range

Question 33

Why is the bar graph reading updated faster than the numerical reading on a DMM?

Answer 33

Easier for the eye to detect.

Question 34

Why is it important to pay attention when reading the display of a DMM?

Answer 34

To avoid misinterpretation errors

Question 35

How does an analogue meter indicate problems?

Answer 35

Movement of its needle

Question 36

How can misinterpretation of a signal value occur on a DMM?

Answer 36

Misreading unit icons

Question 37

How is the resolution of a DMM determined?

Answer 37

By display count and voltage level

Question 38

What is the purpose of the RANGE button on digital multimeters?

Answer 38

Manually change range

Question 39

How does the bar graph on a DMM react?

Answer 39

Like the needle on an analog meter.

Question 40

Why is the HOLD function helpful?

Answer 40

Measurement fluctuates rapidly or reading in awkward place

Question 41

What can a bar graph's quick response reveal?

Answer 41

Loose connections or contact bounce

Question 42

What can DMMs display when test leads are connected to a circuit that is not energized?

Answer 42

Ghost voltages

Question 43

What is a manual range mode type?

Answer 43

A DMM that allows the selection of a specific measurement range

Question 44

What will be displayed on the DMM if the voltage exceeds the maximum value of the set range?

Answer 44

OL (overload)

Question 45

What does the autorange mode do on a multimeter?

Answer 45

Changes to higher range with overload