# Hybrid Book - Chapter 2

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Hybrid EV Tech Book - Chapter 2

Questions and Answers
• 1.

### High-voltage electrical systems and components are always ____.

• A.

Electrically isolated from the vehicle chassis ground

• B.

Electrically connected to the vehicle chassis ground

• C.

Rated at CAT III

• D.

Rated at CAT IV

Correct Answer
A. Electrically isolated from the vehicle chassis ground
Explanation
High-voltage electrical systems and components are always electrically isolated from the vehicle chassis ground to prevent any potential electrical hazards or short circuits. This ensures that there is no direct connection between the high-voltage system and the vehicle's metal frame, reducing the risk of electric shock or damage to the vehicle's electrical system.

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• 2.

### Multimeters should be rated at ___ when used to analyze a high-voltage hybrid system.

• A.

CAT I-600 V

• B.

CAT II-6000 V

• C.

CAT III-1000 V

• D.

CAT IV-2000V

Correct Answer
C. CAT III-1000 V
Explanation
In order to analyze a high-voltage hybrid system, it is important to use a multimeter that is rated at a higher voltage to ensure safety and accuracy. CAT III-1000 V is the correct answer as it indicates that the multimeter is capable of measuring voltages up to 1000 V in a distribution level power system, which is suitable for analyzing a high-voltage hybrid system.

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• 3.

### A technician should assume that a circuit contains high-voltage when a wire, cable, or cable is colored ___.

• A.

Blue

• B.

Red

• C.

Orange

• D.

Gray

Correct Answer
C. Orange
Explanation
When a wire, cable, or cable is colored orange, a technician should assume that the circuit contains high-voltage. This is because orange is commonly used to indicate high-voltage in electrical wiring and systems. It serves as a visual warning to alert technicians and users to the potential danger associated with the circuit.

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• 4.

### ___ is the component of electricity that causes injury.

• A.

Current

• B.

Voltage

• C.

Resistance

• D.

Humidity

Correct Answer
A. Current
Explanation
Current is the flow of electric charge in a circuit. When a person comes into contact with a current, it can cause injury or harm. The severity of the injury depends on the magnitude of the current passing through the body. Therefore, current is the component of electricity that causes injury.

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• 5.

### When using an oscilloscope to measure high voltage, it is recommended that a technician connect a(n) ___ probe to the oscilloscope.

• A.

Isolation amplifier

• B.

Logic scope

• C.

Differential amplifier

• D.

Differential scope

Correct Answer
D. Differential scope
Explanation
When measuring high voltage using an oscilloscope, it is recommended to connect a differential scope probe. A differential scope probe is designed to measure the voltage difference between two points, allowing for accurate and safe measurements of high voltage signals. This type of probe helps to prevent ground loops and provides isolation between the oscilloscope and the measured circuit, reducing the risk of damage to the oscilloscope and ensuring accurate measurement results.

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• 6.

### A Class 0 glove is rated to provide protection up to ___ V.

• A.

500

• B.

1,000

• C.

10,000

• D.

15,000

Correct Answer
B. 1,000
Explanation
A Class 0 glove is rated to provide protection up to 1,000 V. This means that the glove is designed to protect the wearer from electrical shocks or hazards up to 1,000 volts. It is important to use the appropriate level of protection when working with electricity to prevent accidents and injuries.

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• 7.

### An insulation tester measures the insulation ___ to check for a damaged component.

• A.

Voltage

• B.

Current

• C.

Resistance

• D.

Power

Correct Answer
C. Resistance
Explanation
An insulation tester measures the insulation resistance to check for a damaged component. Insulation resistance refers to the measure of how well an electrical insulator can resist the flow of current. By measuring the resistance, the tester can determine if there are any faults or damages in the insulation, which could lead to electrical leakage or short circuits. Therefore, resistance is the correct parameter to measure in order to assess the condition of the insulation and identify any potential issues.

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• 8.

### High-voltage electrical-safety gloves are used to safeguard a technician if a(n) ___.

• A.

Isolation fault is present

• B.

Repair is needed on a positive high-voltage circuit

• C.

Repair is needed on a high-voltage component

• D.

All of the above

Correct Answer
D. All of the above
Explanation
High-voltage electrical-safety gloves are used to safeguard a technician if any of the mentioned scenarios occur. An isolation fault can pose a risk of electrical shock, and the gloves provide insulation to protect against it. When repairing a positive high-voltage circuit or a high-voltage component, the gloves act as a barrier to prevent direct contact with the electricity, reducing the chances of injury. Therefore, using the gloves in all of these situations ensures the technician's safety.

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• 9.

### A(n) ___ applies high voltage to a circuit and measures the resistance between two test points.

• A.

Multimeter

• B.

Insulation tester

• C.

Oscilloscope

• D.

Differential scope probe

Correct Answer
B. Insulation tester
Explanation
An insulation tester is used to apply high voltage to a circuit and measure the resistance between two test points. This device is specifically designed to test the insulation resistance of electrical equipment or wiring. It helps to identify any potential issues with insulation breakdown or leakage current, ensuring the safety and proper functioning of the circuit.

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• 10.

### The typical voltage test level specified by most manufacturers for an insulation meter is ___ V.

• A.

500

• B.

1,000

• C.

1,500

• D.

2,000

Correct Answer
A. 500
Explanation
Most manufacturers specify a typical voltage test level of 500 V for an insulation meter. This voltage level is commonly used because it provides a sufficient amount of voltage to test the insulation resistance of various electrical equipment and systems. It is a standard voltage level that ensures accurate and reliable measurements without causing any damage to the equipment being tested.

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• Current Version
• Dec 01, 2023
Quiz Edited by
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• Nov 04, 2012
Quiz Created by
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