Deck 7: Oscilloscopes and Graphing Multimeters

Question 1

Technician A says an analog scope can store the waveform for viewing later. Technician B says that the trigger level has to be set on most scopes to be able to view a changing waveform. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Answer 1

The voltage that must be detected by the oscilloscope before the pattern will be displayed. The oscilloscope will start only displaying voltage signal when it is triggered.
Trigger level has to set on most oscilloscopes which would be able to view a changing waveform.
Thus, option
is correct.
An analog scope use cathode ray tube (CRT), which is quite similar to the television screen to display voltage patterns and which cannot be used for later viewing.
Thus, option (a) is not correct.

Question 2

What are the differences between an analog and a digital oscilloscope?

Answer 2

The main difference between an analog and digital oscilloscope is determined below:
Analog oscilloscopes use cathode ray tube for voltage patterns display.
However, the major disadvantage is that the waveforms which are shown in an analog oscilloscope are not capable and won't be available for later viewing.
On the other hand, digital oscilloscope creates an image on the display by connecting a large number of dots which are captured by scope leads.
The display grid of the analog display is called a graticule.
Each of the dividing boxes is called a division.

Question 3

An oscilloscope display is called a _______.

A) Grid
B) Graticule
C) Division
D) Box

Answer 3

The characteristic oscilloscope face usually has eight or ten grids vertically as up and down and ten grids horizontally. The transparent scale (grid) is used for reference measurement, which is called as graticule.
Thus, the correct option is
.
The whole arrangement for matrix display is shown in Figure 1.
Figure 1
Rest of the options does not satisfy the above condition. So, the options 'a', 'c', and 'b' are incorrect.

Question 4

What is the difference between DC coupling and AC coupling?

Question 5

A signal showing the voltage of a battery displayed on a digital storage oscilloscope (DSO) is being discussed. Technician A says that the display will show one horizontal line above the zero line. Technician B says that the display will show a line sloping upward from zero to the battery voltage level. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Question 6

Why are DC signals that change called pulse trains?

Question 7

Setting the time base to 50 ms per division will allow the technician to view a waveform how long in duration?

A) 50 ms
B) 200 ms
C) 400 ms
D) 500 ms

Question 8

What is the difference between an oscilloscope and a graphing multimeter?

Question 9

A throttle position sensor waveform is going to be observed. At what setting should the volts per division be set to see the entire waveform from 0 to 5 volts?

A) 0.5 V/division
B) 1.0 V/division
C) 2.0 V/division
D) 5.0 V/division

Question 10

Two technicians are discussing the DC coupling setting on a DSO. Technician A says that the position allows both the DC and AC signals of the waveform to be displayed. Technician B says that this setting allows just the DC part of the waveform to be displayed. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Question 11

Voltage signals (waveforms) that do not go below zero are called _______.

A) AC signals
B) Pulse trains
C) Pulse width
D) DC coupled signals

Question 12

Cycles per second are expressed in ________.

A) Hertz
B) Duty cycle
C) Pulse width
D) Slope

Question 13

Oscilloscopes use what type of lead connector?

A) Banana plugs
B) Double banana plugs
C) Single conductor plugs
D) BNC

Question 14

A digital meter that can show waveforms is called a ________.

A) DVOM
B) DMM
C) GMM
D) DSO