Question 1

Technician A says that analog scopes use an LCD display. Technician B says that digital scopes may use a CRT display. Which technician is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B B

Question 2

With the scope set as shown, the maximum voltage to be measured is ________ and the time displayed will be ________.

Accepted Answer

A)  8 volts; 500mS 
B)  1 volt; 1 second 
C)  1 volt; 500 mS 
D)  None of these 
A)  8 volts; 500mS 
B)  1 volt; 1 second 
C)  1 volt; 500 mS 
D)  None of these A

Question 3

Which type of oscilloscope displays all voltages without taking samples?

Accepted Answer

A)  Complex 
B)  Analog 
C)  Digital 
D)  None of these 
A)  Complex 
B)  Analog 
C)  Digital 
D)  None of these B

Question 4

A DSO and a ________ are useful tools when diagnosing a fuel pump circuit.

Accepted Answer

A)  hose clamp 
B)  current clamp 
C)  vacuum transducer 
D)  test light 
A)  hose clamp 
B)  current clamp 
C)  vacuum transducer 
D)  test light

Question 5

________ the time base setting reduces the number of samples per second.

Accepted Answer

A)  Increasing 
B)  Dividing 
C)  Decreasing 
D)  None of these 
A)  Increasing 
B)  Dividing 
C)  Decreasing 
D)  None of these

Question 6

Which of these terms is a measure of the actual on-time measured in milliseconds?

Accepted Answer

A)  Period 
B)  Pulse width 
C)  Frequency 
D)  Amplitude 
A)  Period 
B)  Pulse width 
C)  Frequency 
D)  Amplitude

Question 7

A digital storage oscilloscope is set to begin displaying a waveform when a certain voltage is detected. This minimum voltage is called ________.

Accepted Answer

A)  threshold 
B)  trigger 
C)  trip 
D)  None of these 
A)  threshold 
B)  trigger 
C)  trip 
D)  None of these

Question 8

A TP sensor signal voltage is being observed using a digital storage oscilloscope. The pattern on the scope occasionally rises to the source voltage level. What does this indicate?

Accepted Answer

A)  Normal operation 
B)  A momentary short in the TP sensor 
C)  A momentary open circuit 
D)  A fault with the scope leads 
A)  Normal operation 
B)  A momentary short in the TP sensor 
C)  A momentary open circuit 
D)  A fault with the scope leads

Question 9

Two technicians are discussing pulse train signals. Technician A says that a pulse train is a DC signal waveform that goes above and below zero volts. Technician B says that a pulse train is a DC voltage that turns on and off in a series of pulses and they do not go below zero. Which technician is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Question 10

Which of these is measured as a percentage?

Accepted Answer

A)  Pulse width 
B)  Duty cycle 
C)  Dwell 
D)  None of these 
A)  Pulse width 
B)  Duty cycle 
C)  Dwell 
D)  None of these

Question 11

Which is the correct voltage division setting for testing a throttle position sensor?

Accepted Answer

A)  1V 
B)  3V 
C)  5V 
D)  10V 
A)  1V 
B)  3V 
C)  5V 
D)  10V

Question 12

A signal showing the voltage of a battery displayed on an analog oscilloscope 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?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Question 13

A typical DSO display screen is arranged in an ________ grid.

Accepted Answer

A)  6 × 8 
B)  8 × 10 
C)  8 × 8 
D)  None of these 
A)  6 × 8 
B)  8 × 10 
C)  8 × 8 
D)  None of these

Question 14

A time base setting of 1ms/div will show a total time of ________ on the scope display

Accepted Answer

A)  100 ms 
B)  1 ms 
C)  10 ms 
D)  None of these 
A)  100 ms 
B)  1 ms 
C)  10 ms 
D)  None of these

Question 15

Technician A says that voltage is usually indicated on the horizontal display axis. Technician B says that time is usually indicated on the horizontal display axis. Which technician is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Exam 4: Oscilloscopes and Dsos

Technician A says that analog scopes use an LCD display. Technician B says that digital scopes may use a CRT display. Which technician is correct?

With the scope set as shown, the maximum voltage to be measured is ________ and the time displayed will be ________.

Which type of oscilloscope displays all voltages without taking samples?

A DSO and a ________ are useful tools when diagnosing a fuel pump circuit.

________ the time base setting reduces the number of samples per second.

Which of these terms is a measure of the actual on-time measured in milliseconds?

A digital storage oscilloscope is set to begin displaying a waveform when a certain voltage is detected. This minimum voltage is called ________.

A TP sensor signal voltage is being observed using a digital storage oscilloscope. The pattern on the scope occasionally rises to the source voltage level. What does this indicate?

Which of these is measured as a percentage?

Which is the correct voltage division setting for testing a throttle position sensor?

A typical DSO display screen is arranged in an ________ grid.

A time base setting of 1ms/div will show a total time of ________ on the scope display

Technician A says that voltage is usually indicated on the horizontal display axis. Technician B says that time is usually indicated on the horizontal display axis. Which technician is correct?

The Diagnostic Process

Gasoline, Alternative Fuels, and Diesel Fuels

Circuit Testers and Digital Meters

Engine Systems

In-Vehicle Engine Service

Valve Train and Variable Valve Timing Diagnosis

Engine and Misfire Diagnosis

Can and Network Communications

Onboard Diagnosis

Global Obd Ii and Mode 06

Immobilizer Systems

Starting and Charging System Diagnosis

Ignition System Operation and Diagnosis

Temperature Sensors

Throttle Position Tp Sensors

Map and Maf Sensors

Electronic Throttle Control Systems

Oxygen Sensors

Fuel Trim Diagnosis

Fuel Pumps, Lines, and Filters

Fuel-Injection Components and Operation

Gasoline Direct-Injection Systems

Fuel-Injection System Diagnosis and Service

Electronic Transmission Controls

Vehicle Emissions Standards and Testing

Emission Control Devices Operation and Diagnosis

Module Reprogramming

Symptom-Based Diagnosis

Filters

With the scope set as shown, the maximum voltage to be measured is and the time displayed will be .