Electrical Test Equipment

 

1. 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.

 

2. 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.

 

3. Oscilloscopes can be used to

view the shape of voltage waveforms.
measure voltage over a period of time.
measure resistance.
both a and b

 

4. 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.

 

5. The voltmeter in the circuit below should read:

12.0 volts.
0.0 volts.
source voltage.
6.0 volts.

 

6. A pulsing voltage is easiest to read on

Digital voltmeter.
Meter with a needle.
Meter that measures resistance.
Digital ohmmeter.

 

7. 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.
technician.

 

8. 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.

 

9. The analog voltmeter reading shown below is:


11.0 volts.
22.0 volts.
2.2 volts.
0.22 volts.

 

10. 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.

 

11. 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.

 

12. 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.

 

13. 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.

 

14. 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.

 

15. 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.

 

16. 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.

 

17. 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.
connected to the resistance after removing it from the circuit.

 

18. The 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.

 

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

zero.
under 35 milliamperes.
under 100 milliamperes.
under 3 amperes.

 

20. 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.

 

21. 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.

 

22. 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.

 

23. 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.

 

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.

 

25. Two technicians are discussing a 25% duty cycle of an electrical cooling fan. Technician A says the pulse width is 25% measured in hertz. Technican B says this indicates the fan in ON 25% and off 75% OFF the time

Technician A only.
Technician B only.
Both Technicians A and B.
Neither Technicians A nor B.

 

 
Red Kap Automotive Mechanics Clothing

Top of the Page