Question 1

What can vacuum readings from an operating engine tell us?

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Question 2

What tool is used to measure shaft endplay?

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Question 3

What statement is true concerning engine vacuum?
A)Engine vacuum is not related to engine problems.
B)The vacuum gauge must be connected to a fitting in the intake manifold.
C)A rise in vacuum is a sign of a properly operating engine.
D)Average reading for a properly running engine is approximately 25-30 in. Hg.

Accepted Answer

The vacuum gauge must be connected to a fitting in the intake manifold.

Question 4

What will thrust wear cause in a cylinder bore?

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Question 5

Name two different types of micrometers.

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Question 6

What tool is used to measure spark plug gap?

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Question 7

What tool is used to measure the thickness of a brake rotor?

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Question 8

What tool is used to measure runout on a brake rotor?

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Question 9

Describe how to measure spark plug gap.

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Question 10

What device is added to an inside micrometer when measuring a cylinder with a diameter larger than one inch?

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Question 11

Two technicians are discussing brake rotor thickness. Technician A says that rotors must be removed to measure thickness. Technician B says that rotors can be measured on or off the vehicle. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Technician B is correct because brake rotor thickness can indeed be measured both on and off the vehicle using appropriate tools like a micrometer or a caliper. Removing the rotor is not a necessity for measuring its thickness.

Question 12

What are two things that should be considered when observing measurements from a cylinder bore?

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Question 13

Runout is measured with a(n)_____.
A)dial indicator
B)inside micrometer
C)caliper
D)outside micrometer

Accepted Answer

Runout is typically measured using a dial indicator, which can detect any deviation from true rotational motion by measuring the displacement of a spindle or rotating object. Inside micrometers and calipers are used for measuring internal and external dimensions, respectively, while outside micrometers are used for measuring larger external dimensions.

Question 14

What is the purpose of pressure measurements on antilock brake systems?

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Question 15

What component is used to trigger sensors in a wheel speed sensor?

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Question 16

What two types of dial indicators can be used to measure rotor runout?

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Question 17

Where is the minimum thickness specification for a brake disc located for a specific vehicle?

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Question 18

How do you measure a cylinder bore with a telescoping gauge?

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Question 19

Two technicians are discussing engine vacuum readings. Technician A says that a fluctuating vacuum gauge is a sign of a vacuum leak. Technician B says that a fluctuating vacuum gauge is a sign of possible engine problems. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Technician B is correct. A fluctuating vacuum gauge reading can indicate a variety of engine problems, such as a misfire, incorrect valve timing, or low compression, not just a vacuum leak. It is important to diagnose the specific issue causing the fluctuation.

Question 20

Two technicians are discussing measuring pressure in an automobile. Technician A says that fuel, oil, automatic transmission, and brake pressure can be measured. Technician B says that the pressure gauge must read in hundreds of pounds of pressure. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Technician A is correct that fuel, oil, automatic transmission, and brake pressure can be measured in an automobile. Technician B is incorrect in stating that the pressure gauge must read in hundreds of pounds of pressure, as different systems may require different units of measurement.

Quiz 4: Measurements and Precision Measuring Devices Precision Measurements