# Quiz On Meter Usage And Circuit Diagnosis

25 Questions | Attempts: 8886  Settings  How good are you at understanding electrical engineering and electrical measuring tools? Check out this quiz based on meter usage and circuit diagnosis to test your memory for the same. An electrical or energy meter is a measuring tool that measures the total power consumed over time. Identifying the components or connections responsible for malfunctioning a defective circuit board is called the circuit diagnosis. Here, we will ask questions about insulators, electrical circuits, and Ohm's law. Can you pass this quiz? Play it out and test yourself.

• 1.
What materials make a good insulator?
• A.

Copper and aluminum

• B.

Ceramic and plastic

• C.

Both A and B

• D.

None of the above

• 2.
Tech A says AC stands for alternating voltage. Tech B says DC is used in electric motors on most hybrid vehicles. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 3.
Tech A says high resistance causes an increase in current flow. Tech B says a voltage drop is another name for high resistance. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 4.
Tech A says parallel circuits are like links in a chain. Tech B says total current in a parallel circuit equals the sum of the current flowing in each branch of the circuit. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 5.
Tech A says relays are turned on and off by a small amount of current. Tech B says there are two types of relays: normally closed (NC) and normally open (NO) types. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 6.
What does DVOM stand for?
• A.

Digital volt–hour meter

• B.

Digital volt-ohmmeter

• C.

Digital valve ohmmeter

• D.

Digital variable oval meter

• 7.
When reading a digital volt-ohmmeter (DVOM), you have a reading of 2168 mV, which is the same as:
• A.

2168 millivolts.

• B.

2.168 volts.

• C.

1000 mV.

• D.

Both A and B

• 8.
When probing wires, you should do all these EXCEPT:
• A.

Back probe when possible.

• B.

Use caution when piercing wiring not to damage the wire internally.

• C.

Reinsulate the hole with room temperature vulcanizing silicone.

• D.

Never use excessive force.

• 9.
Tech A says you can measure up to 100 amps directly through the meter. Tech B says when checking high volts, you need to use a volt clamp so you don't damage the digital volt-ohmmeter (DVOM). Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 10.
Tech A says most digital volt-ohmmeters (DVOMs) have both auto range and a manual range setting. Tech B says OL means overload and indicates the voltage being read is higher than the maximum. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 11.
When doing a voltage drop test, the reading is 2.7 volts across the circuit. How many volts are going to the load?
• A.

12 volts

• B.

9.3 volts

• C.

8.3 volts

• D.

3.7 volts

• 12.
Tech A says testing across the battery will show you better voltage. Tech B says when checking across a switch, it has a 2-volt drop, which means only about 10 volts are going to the light. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 13.
Tech A says when doing a voltage drop test, the voltmeter needs to be set to ohm. Tech B says current has to be flowing to do a voltage drop test. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 14.
Tech A says that in a relay, current is sent through a resistor and a magnetic field is produced. Tech B says to check the amps in a circuit, you need to connect the leads parallel to the circuit. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 15.
Tech A says when checking resistance in a circuit, you need to have power connected to the component. Tech B says ideally, you should have a component disconnected. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 16.
Tech A says Ohm's law will show how many amps are needed in a circuit with 110 ohm resistor and a 12-volt power supply. The amps needed are:
• A.

12 amps.

• B.

1.2 amps.

• C.

0.12 amps.

• D.

0.012 amps.

• 17.
Tech A says there are three ways to check a circuit with Ohm's law. Tech B says if you know two of the measurements, Ohm's law will show you the third. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 18.
When discussing a circuit, you know the voltage is 0.202 volts and the current draw is 0.00202 amp. What is the resistance in the circuit?
• A.

1

• B.

10

• C.

100

• D.

10000

• 19.
When doing a voltage drop test, you should do all these EXCEPT:
• A.

Select auto range volts DC.

• B.

Connect the red lead to volt/ohm.

• C.

Remove the positive battery cable.

• D.

Ensure the current is flowing.

• 20.
Tech A says you can calculate total circuit current with this formula I = V ÷ R. Tech B says you can determine the total voltage drop using Ohm's law. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 21.
Tech A says voltage drops can be measured as long as current is flowing. Tech B says voltage drops can be measured across components, connectors, or cables. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 22.
When calculating current flow in a parallel circuit that has 4 resistors, you would:
• A.

Divide the total current flow by the volts.

• B.

Multiply the current flow by 4.

• C.

Add the current flow for each resistor together.

• D.

Subtract the volts from amps and add 2 volts.

• 23.
A variable resistor:
• A.

Has a fixed resistance.

• B.

Changes with the amount of voltage applied.

• C.

Has a movable arm that swipes across a coil that has less resistance at one end and more at the other.

• D.

All of the above

• 24.
Tech A says checking a variable resistor is almost the same as a regular resistor. Tech B says you have to have a different type of digital volt-ohmmeter (DVOM) to read a variable resistor. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

• 25.
Tech A says an oscilloscope is commonly referred to as a lab scope or just scope. Tech B says lab scopes are not very important test instruments in a modern automobile. Who is correct?
• A.

Tech A

• B.

Tech B

• C.

Both Techs A and B

• D.

Neither Tech A nor B

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