Question 1

Technician A says a vernier caliper can be used to measure disc pad thickness. Technician B says a dial indicator may be used to measure pad thickness. Who is correct?

Accepted Answer

A vernier caliper is a precise measuring tool suitable for measuring disc pad thickness. A dial indicator is not typically used for measuring thickness directly.

Question 2

Technician A says a self-powered test light is called a continuity tester and is used with the power off in the circuit being tested. Technician B says digital multimeters provide very precise voltage measurement. Who is correct?

Accepted Answer

Technician A is correct. A self-powered test light is also called a continuity tester and is used to test for continuity with the power off in the circuit being tested. 
Technician B is also correct. Digital multimeters provide very precise voltage measurements and are often used by technicians to diagnose electrical problems. Therefore, both technicians are correct.

Question 3

____________ is the electromotive force that causes current to flow.

Accepted Answer

The answer of ____________ is the electromotive force that causes...

Question 4

The effects of inertia and velocity illustrate why a high performance car needs a brake system with greater stopping power than an economy car with only modest performance.

Accepted Answer

This statement is true because a high performance car is capable of reaching higher speeds and has more mass which increases its inertia. A brake system with greater stopping power is necessary to counteract this momentum and bring the car to a safe and controlled stop. An economy car with modest performance has a lower maximum speed and less mass, therefore its brake system does not need to be as powerful.

Question 5

Technician A says common automotive metric fastener grades for automotive use are 9.8 and 10.9. Technician B says using an incorrect fastener can result in personal injury. Who is correct?

Accepted Answer

Technician A is correct that common automotive metric fastener grades for automotive use are 9.8 and 10.9. Technician B is also correct that using an incorrect fastener can result in personal injury. Therefore, both Technician A and Technician B are correct.

Question 6

Semimetallic or organic compounds have different coefficients of friction.

Accepted Answer

Semimetallic and organic compounds have different physical properties, including their coefficients of friction. Therefore, they would have different frictional behaviors when subjected to the same conditions.

Question 7

When the driver applies the brakes, the vehicle-not the driver or the passengers-is being slowed. Without seat belts and air bags, the vehicle occupants tend to keep moving in the same direction and at the same speed of the vehicle as before the brakes were applied.

Accepted Answer

This is true. Without seat belts and air bags, the vehicle occupants tend to keep moving in the same direction and at the same speed of the vehicle as before the brakes were applied.

Question 8

Impact wrenches are being discussed. Technician A says they are most suitable for removing fasteners like wheel lug nuts or axle nuts. Technician B says most sockets are suitable for use with an impact wrench. Who is correct?

Accepted Answer

Technician A is correct. Impact wrenches are designed to apply high torque output with minimum force from the user, making them ideal for removing stubborn fasteners such as wheel lug nuts or axle nuts.

Technician B is incorrect. Not all sockets are suitable for use with an impact wrench. Impact sockets are specifically designed to withstand the high torque output of an impact wrench, and using regular sockets may cause them to crack or break under the stress.

Question 9

Five of the most important characteristics of a brake friction material are: 
1. The ability to resist fading when the brake system temperature ____________________. 
2. The ability to resist fading when the parts get ____________________. 
3. The ability to recover quickly from ____________________ or ____________________ fading. 
4. The ability to wear ____________________ without causing wear to brake rotor or drum surfaces. 
5. The ability to provide a _____________, _____________frictional contact with a rotor or drum.

Accepted Answer

The answer of Five of the most important characteristics of...

Question 10

Repeated hard stops in a short period of time can severely overheat brake components and reduce braking effectiveness. This is called ____________________.

Accepted Answer

The answer of Repeated hard stops in a short period...

Question 11

Excessive amounts of heat generated during braking action increases the coefficient of friction and allows for shorter stopping distances.

Accepted Answer

Excessive heat generated during braking action can actually decrease the coefficient of friction between the brake pads and rotors, leading to longer stopping distances due to brake fade.

Question 12

Line and hose fittings are being discussed. Technician A says always use a flare-nut (line)wrench to loosen a line fitting. Technician B says an open-end wrench is sufficient for fully tightening the fittings. Who is correct?

Accepted Answer

Technician A is correct because using an open-end wrench to loosen a line fitting can easily strip or damage the fitting, whereas a flare-nut wrench prevents damage to the fitting. Technician B is incorrect because fully tightening fittings requires a torque wrench to ensure proper tightness, not just an open-end wrench.

Question 13

The terms mass and ____________ can be used interchangeably.

Accepted Answer

The answer of The terms mass and ____________ can be...

Question 14

Newton's second law of motion states that " for every action there is an ____________________ and____________________ reaction".

Accepted Answer

The answer of Newton's second law of motion states that...

Question 15

Kinetic energy increases ____________ with vehicle weight.

Accepted Answer

The answer of Kinetic energy increases ____________ with vehicle weight....

Question 16

Many power brake systems use ___________ to provide a power assist for the driver.

Accepted Answer

The answer of Many power brake systems use ___________ to...

Question 17

Energy can be neither created nor can it be destroyed, however, it can be ____________________ from one form to another.

Accepted Answer

The answer of Energy can be neither created nor can...

Question 18

Technician A says a digital storage oscilloscope is used to analyze electrical waveforms in minute detail. Technician B says scan tools allow the technician to interface with the vehicle computer network. Who is correct?

Accepted Answer

Technician A is correct that a digital storage oscilloscope (DSO) is used to analyze electrical waveforms in minute detail. Technician B is also correct that scan tools allow the technician to interface with the vehicle computer network. Therefore, both technicians are correct.

Question 19

._______ is the molecular density of an object.

Accepted Answer

The answer of ._______ is the molecular density of an...

Question 20

Vacuum is generally considered to be air pressure ____________________ than atmospheric pressure (14.7 PSI).

Accepted Answer

The answer of Vacuum is generally considered to be air...

Quiz 2: Principles and Theories of Operation