Question 1

Technician A says a 9-volt memory keeper will keep clock and radio setting while replacing a battery. Technician B says a memory keeper should be used when servicing an air bag circuit. Who is correct?

Accepted Answer

Technician A is correct that a 9-volt memory keeper can keep clock and radio settings while replacing a battery. Technician B is incorrect as a memory keeper should not be used when servicing an air bag circuit, as it can pose a potential safety hazard.

Question 2

What is hertz a measurement of?

Accepted Answer

The answer of What is hertz a measurement of?...

Question 3

The ____ is a contract between the customer and the shop to have specified service performed.

Accepted Answer

A work order is a document that outlines the specific services requested by a customer and the price for those services. It serves as a contract between the customer and the shop, ensuring that both parties are aware of the scope of the work to be performed and the associated costs.

Question 4

The display of a DVOM is indicating 236 mV. Which of the following is the same as this value?

Accepted Answer

The abbreviation "mV" stands for millivolts which means one-thousandth of a volt. Therefore, 236 mV would be .236 volts. Choice A is incorrect because 0.236 millivolts is smaller than the given value. Choice C is incorrect because 23.6 volts is much larger than the given value. Choice D is incorrect because 0.000236 volts is much smaller than the given value.

Question 5

Logic probes can be used only on ____ circuits.

Accepted Answer

Logic probes are used to test digital circuits, which work on binary signals of 1's and 0's. Analog circuits, on the other hand, are continuous signals and require different testing equipment. LCD and insulated are not relevant to the use of logic probes.

Question 6

What is an ohmmeter used for?

Accepted Answer

The answer of What is an ohmmeter used for?...

Question 7

Technician A says that a logic probe may be used on computer controlled circuits. Technician B says that a logic probe may be used on a low voltage pulsed signal. Who is correct?

Accepted Answer

Both technicians are correct. A logic probe can be used to test computer controlled circuits as well as low voltage pulsed signals.

Question 8

When the ohmmeter test leads are connected to two terminals of a switch, the meter reads 0 ohms. What does this indicate?

Accepted Answer

When an ohmmeter test reads 0 ohms, it indicates continuity between the two terminals, meaning that there is a complete path for current to flow through the switch when it is closed.

Question 9

Technician A says that a digital storage oscilloscope is like a very fast reacting volt meter. Technician B says the upward trace on a digital storage oscilloscope screen indicates a specific period of time. Who is correct?

Accepted Answer

Technician A is correct because a digital storage oscilloscope does measure voltage over time, but it is more accurate to describe it as capturing and displaying signal voltages. Technician B is incorrect because the upward trace on an oscilloscope screen represents voltage, not time; time is represented horizontally.

Question 10

What does a voltmeter measure?

Accepted Answer

The answer of What does a voltmeter measure?...

Question 11

Connected to the ____ through diagnostic connectors, a scan tool can access diagnostic trouble codes (DTCs), run tests to check system operations, and monitor the activity of the system.

Accepted Answer

A scan tool is typically connected to the computer of a vehicle through diagnostic connectors in order to access diagnostic trouble codes (DTCs), run tests to check system operations, and monitor the activity of the system. The powertrain and battery may be part of the system being diagnosed, but they are not directly connected to the scan tool. A DMM (digital multimeter) is a different diagnostic tool that measures electrical values such as voltage, current, and resistance.

Question 12

Technician A says a voltmeter measures the electrical difference between two points of the circuit. Technician B says a voltmeter that is connected in parallel to the load device will indicate the voltage drop across the device. Who is correct?

Accepted Answer

Technician A is correct in stating that a voltmeter measures the electrical difference between two points of the circuit. Technician B is also correct in stating that a voltmeter connected in parallel to the load device will indicate the voltage drop across the device. Therefore, both technicians are correct.

Question 13

What does an ammeter measure?

Accepted Answer

The answer of What does an ammeter measure?...

Question 14

Which of the following statements is most correct?

Accepted Answer

Voltage drop testing tests the circuit while under load, which allows for a more accurate measurement of the actual voltage being delivered to the load. Option B is also correct that an ammeter must be connected in parallel to the load, but it is not the most correct option. Option C is incorrect, as an ohmmeter tests for continuity and resistance, not under a simulated load. Option D is incorrect, as an insulation meter is used to measure the insulation resistance between conductors in high voltage equipment, not high voltage itself.

Question 15

The insulation test function is being discussed. Technician A says that the test is performed with the circuit powered. Technician B says the meter displays the circuit's voltage. Who is correct?

Accepted Answer

The insulation test, often performed with a megohmmeter or insulation resistance tester, requires the circuit to be de-energized (powered off) to safely measure the resistance of the insulation. The meter does not display the circuit's voltage; instead, it measures and displays the insulation resistance, typically in megohms.

Question 16

All of the following concerning the use of jumper wires are true except:

Accepted Answer

Using a jumper wire to bypass the load device is incorrect because it can cause a short circuit or damage the circuit by allowing excessive current to flow without the load's resistance.

Question 17

What does a lab scope provide?

Accepted Answer

The answer of What does a lab scope provide?...

Question 18

While using a test light to check for voltage, the lamp illuminates bright. Technician A says this indicates that the circuit can handle the load that is required by the test light. Technician B says the amperage to turn on the  light is dependent on the type and rating of the bulb. Who is correct?

Accepted Answer

Technician A is correct because a bright light indicates the circuit can handle the load. Technician B is correct because the amperage needed depends on the bulb's type and rating.

Question 19

A ____ is used when the technician needs to look for electrical power in the circuit.

Accepted Answer

A test light is a simple tool used for checking voltage in a circuit. It consists of a bulb and a sharp probe for piercing wires to test for electrical power.

Question 20

The best way of determining if a switch is faulty is being discussed. Technician A says to use an ohmmeter with the switch isolated to test continuity through the switch. Technician B says to use a jumper wire to bypass the switch in order to operate the various circuits controlled by the switch. Who is correct?

Accepted Answer

Both Technician A and B are correct. Using an ohmmeter with the switch isolated to test continuity through the switch can determine if the switch is faulty. Additionally, using a jumper wire to bypass the switch and operate the various circuits controlled by the switch can also help determine if the switch is faulty by checking if the circuits work properly without the switch in the circuit.

Quiz 2: Basic Theoriesspecial Tools and Procedures