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| By Yogesh132

Yogesh132

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Quizzes Created: 1 | Total Attempts: 476

| Attempts: 476 | Questions: 24

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1. A possible cause of an open circuit would be:

A loose component mount.

A corroded connection.

A pin pushed out of a connector.

All of the above.

Any of the above can cause an open circuit.

Explanation

Any of the above can cause an open circuit.

Submit

About This Quiz

This quiz assesses knowledge in electronics, focusing on the use of tools like ohmmeters, voltmeters, oscilloscopes, and ammeters. It tests understanding of their applications and measurements in practical scenarios.

2. If a fuse blows again after it has been replaced, what is the most likely cause:

Resistance in the circuit is too high.

The ground point has become disconnected.

Current or "amps" through circuit too high.

Open circuit in component.

A drop in circuit resistance will cause current flow to increase.

Explanation

A drop in circuit resistance will cause current flow to increase.

Submit

3. Technician A says a voltmeter is connected in series to measure voltage. Technician B says it is connected in parallel. Who is correct?

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

Voltmeters are connected in parallel or across a circuit.

Explanation

Voltmeters are connected in parallel or across a circuit.

Submit

4. In using a voltmeter to measure the voltage drop across a resistance, the two leads are:

Connected one on each side of the resistance without break the circuit.

Connected anywhere in the circuit after breaking the circuit.

Connected to the resistance after removing it from the circuit.

A voltace drop measurement is the fastest way to identify resistance problems.

Explanation

A voltace drop measurement is the fastest way to identify resistance problems.

Submit

5. The analog voltmeter reading shown below is:

11.0 volts.

22.0 volts.

2.2 volts.

0.22 volts.

2.2 volts with the slector knob set to the 4.0 volt range

Explanation

2.2 volts with the slector knob set to the 4.0 volt range

Submit

6. A DVOM (digital volt meter) is being used to measure current flow. The meter indicates 154 mA. Technician A says this is 0.154 amps. Technician B says this is 1.54 amps because the decimal point must be moved 4 decimal points to the left.

Technician A

Technician B

Both technicians A and B.

Neither

To convert mA to A, move the decimal point three places to the left. 1000 mA equals 1 A.

Explanation

To convert mA to A, move the decimal point three places to the left. 1000 mA equals 1 A.

Submit

7. Before connecting an ohmmeter to a circuit, you should first:

Operate the circuit.

Set the range selector to the highest range.

Check the circuit with a voltmeter to make sure the circuit is not powered.

Install new batteries.

Voltage will damage the ohmmeter. Verify the cirucit is electrially dead.

Explanation

Voltage will damage the ohmmeter. Verify the cirucit is electrially dead.

Submit

8. What can cause an excessive voltage drop?

Excessively large size wires.

Too much insulation on the wire.

Excessive resistance in any part of the circuit.

A short bypassing the load being tested.

Electrons will give up voltage as heat to get past the resistance.

Explanation

Electrons will give up voltage as heat to get past the resistance.

Submit

9. A Digital Ohmmeter is being use to measure a component. The meter indicates 3.725K ohms. This indicates

0.3725 ohms.

3.725 ohms.

3,725 ohms.

3,725,000 ohms.

The K equals 1000. Move the decimal point three places to the right (replace the K with three zeros).

Explanation

The K equals 1000. Move the decimal point three places to the right (replace the K with three zeros).

Submit

10. Oscilloscopes can be used to

View the shape of voltage waveforms.

Measure voltage over a period of time.

Measure resistance.

Both a and b

Oscilloscopes display the shape of voltage waveform over a period of time.

Explanation

Oscilloscopes display the shape of voltage waveform over a period of time.

Submit

11. When using an ammeter to measure current:

Open the circuit and connect the meter in series between the two open ends.

Open the circuit at the positive and negative terminals of the battery.

Connect the meter across the battery or load.

Open the circuit at one point and connect the meter to one end.

Amp meters are placed in series with a working circuit to measure current.

Explanation

Amp meters are placed in series with a working circuit to measure current.

Submit

12. When measuring an unknown voltage or current, set the range selector at:

The point midway between the lowest and the highest range.

Any point, and work downward and upward until the proper range is determined.

The highest point, and work downward until the proper range is determined.

The lowest point, and work upward to the proper range.

Always start at the highest settings and work down.

Explanation

Always start at the highest settings and work down.

Submit

13. When performing a continuity check using a Fluke digital ohmmeter, a reading of 'OL' would indicate:

An open.

A short.

An internal ground.

Proper continuity.

OL means over limit (open circuit).

Explanation

OL means over limit (open circuit).

Submit

14. To measure the voltage drop of a connector, the volt meter should be connected:

In series, between the connector and the battery.

In parallel, across each side of the connector.

In parallel, between the connector and the battery.

In series, between the connector and the circuit load.

The circuit must remain intact with a voltmeter lead attached on each side. The voltmeter will measure the difference in electrial voltage potential (voltage drop) between each of the two voltmeter leads.

Explanation

Submit

15. A fuse burns out whenever the Brake pedal (stop light switch) is depressed, Technician A says a short circuit is present before the switch and a short finder is required. Technician B says the short circuit is complete when the switch is closed and must be after the switch. Who is correct?

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

Since the fuse blows only when the pedal is depressed, it must be after the switch but before the load .

Explanation

Since the fuse blows only when the pedal is depressed, it must be after the switch but before the load .

Submit

16. The voltmeter in the circuit below should read:

12.0 volts.

0.0 volts.

Source voltage.

6.0 volts.

With an open switch, source voltage runs all the way to the open.

Explanation

With an open switch, source voltage runs all the way to the open.

Submit

17. Referring to the picture below, Technician A states that a voltmeter is the best meter for measuring for an unwanted battery drain. Technician B states that an ammeter is the best meter to use for checking for an excessive battery drain, because it measures how much of a drain there is. Who is correct:

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

An amp meter in series with the battery will allow you to measure battery drain.

Explanation

An amp meter in series with the battery will allow you to measure battery drain.

Submit

18. Technician A says that a digital meter is preferred to an analog meter when measuring sensitive computer circuits. Technician B says that an analog meter might overload a computer circuit. Who is correct?

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

Both statements are true.

Explanation

Both statements are true.

Submit

19. When checking a normally open relay (with four terminals) with and ohmmeter, no continuity will be shown between two terminals and the other two terminals will show:

No continuity.

Resistance somewhere between 40ohms and 120 ohms.

Perfect continuity (0 ohms).

About 2000 ohms.

Many automotive relay will have control coil resistances of 40 ohms to 120 ohms.

Explanation

Many automotive relay will have control coil resistances of 40 ohms to 120 ohms.

Submit

20. A pulsing voltage is easiest to read on

Digital voltmeter.

Meter with a needle.

Meter that measures resistance.

Digital ohmmeter.

Pulsating voltages are easiest read on an analog meter.

Explanation

Pulsating voltages are easiest read on an analog meter.

Submit

21. In solid state circuits, the following must be used:

An analog meter with an electromagnetic coil.

A digital meter.

Low impedance meter.

A analog meter.

High impedance meters are required on solid state circuits. All digital meters are high impedance meters.

Explanation

High impedance meters are required on solid state circuits. All digital meters are high impedance meters.

Submit

22. he lamp in the circuit below glows dimly. A voltmeter indicates 12.6 volts at the lamp. Technician "A" says that a bad ground at the lamp could be the cause. Technician "B" says that high resistance in the circuit from the battery to the lamp could be the cause. Who is correct?

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

With source voltage at the lamp the circuit up to that point is funtioning correctly.

Explanation

With source voltage at the lamp the circuit up to that point is funtioning correctly.

Submit

23. With all accessories turned off, the current (Parasitic) drain on the battery should be:

Zero.

Under 35 milliamperes.

Under 100 milliamperes.

Under 3 amperes.

For most current model vehicles, parasitic drain should be under 35 milliamps.

Explanation

For most current model vehicles, parasitic drain should be under 35 milliamps.

Submit

24. An audible short finder is being used. The transmitter is placed at the fuse box and the receiver is passed along the wire. Technician A say it will be beep rapidly at the point of ground (short). Technician B says that it will beep only when the short is located. Who is correct?

Technician A only.

Technician B only.

Both Technicians A and B.

Neither Technicians A nor B.

The tone will increase at the short then decrease as you move away.

Explanation

The tone will increase at the short then decrease as you move away.

Submit

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