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Questions and Answers
What is the primary function of a Vernier Caliper?
What is the primary function of a Vernier Caliper?
What is the minimum measurement that can be taken with a Vernier Caliper?
What is the minimum measurement that can be taken with a Vernier Caliper?
What is the purpose of a dial gauge attached to a Vernier Caliper?
What is the purpose of a dial gauge attached to a Vernier Caliper?
What is the name of the tool used to measure small distances such as clearance between two parts?
What is the name of the tool used to measure small distances such as clearance between two parts?
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What is the main advantage of using a Vernier Caliper over a Micrometer?
What is the main advantage of using a Vernier Caliper over a Micrometer?
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What is the name of the part of the Vernier Caliper used to measure the depth of an object?
What is the name of the part of the Vernier Caliper used to measure the depth of an object?
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What is the purpose of a Thickness Gauge?
What is the purpose of a Thickness Gauge?
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What is the unit of measurement that can be read on a Vernier Caliper?
What is the unit of measurement that can be read on a Vernier Caliper?
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What is the purpose of the classification on the dial face of the gauge?
What is the purpose of the classification on the dial face of the gauge?
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What is the first step in taking a measurement with a dial indicator?
What is the first step in taking a measurement with a dial indicator?
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Why is it important to turn the dial face during measurement?
Why is it important to turn the dial face during measurement?
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What should you do to ensure the accuracy of measurement with a dial indicator?
What should you do to ensure the accuracy of measurement with a dial indicator?
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How should the legs of the vernier caliper be aligned with the object to be measured?
How should the legs of the vernier caliper be aligned with the object to be measured?
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What should you do to the objects to be measured with a vernier caliper?
What should you do to the objects to be measured with a vernier caliper?
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What is the purpose of the lock screw on a vernier caliper?
What is the purpose of the lock screw on a vernier caliper?
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Why is it important to check the accuracy of a vernier caliper?
Why is it important to check the accuracy of a vernier caliper?
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What type of tachometer is suitable for distributorless ignition systems?
What type of tachometer is suitable for distributorless ignition systems?
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What is the main purpose of a timing light?
What is the main purpose of a timing light?
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How do digital tachometers measure engine speed?
How do digital tachometers measure engine speed?
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What is the function of a spark tester?
What is the function of a spark tester?
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What type of tachometer clamps over the number 1 spark plug wire?
What type of tachometer clamps over the number 1 spark plug wire?
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What is displayed on the LED display of some timing lights?
What is displayed on the LED display of some timing lights?
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What is the main difference between a spark tester and a spark plug?
What is the main difference between a spark tester and a spark plug?
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What is the purpose of the Vernier scale in a micrometer?
What is the purpose of the Vernier scale in a micrometer?
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How do inductive pickup tachometers work?
How do inductive pickup tachometers work?
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How do you determine the value of the additional digits on the Vernier scale?
How do you determine the value of the additional digits on the Vernier scale?
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What is the purpose of the ratchet speeder in a micrometer?
What is the purpose of the ratchet speeder in a micrometer?
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What do you need to ensure when adding the main scale and Vernier scale readings together?
What do you need to ensure when adding the main scale and Vernier scale readings together?
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What is the purpose of the anvil in a micrometer?
What is the purpose of the anvil in a micrometer?
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What is the correct order of steps when using a micrometer?
What is the correct order of steps when using a micrometer?
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What is the final measurement if the main scale reads 2.6 inches and the Vernier scale reads 0.014 inches?
What is the final measurement if the main scale reads 2.6 inches and the Vernier scale reads 0.014 inches?
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Why is it important to ensure the units are the same when adding the main scale and Vernier scale readings together?
Why is it important to ensure the units are the same when adding the main scale and Vernier scale readings together?
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What is the main purpose of an annual report?
What is the main purpose of an annual report?
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What is the first step in developing records and documents?
What is the first step in developing records and documents?
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What is the last step in the problem reporting procedure?
What is the last step in the problem reporting procedure?
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What is the purpose of a standardized, consistent format in developing records and documents?
What is the purpose of a standardized, consistent format in developing records and documents?
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What is the main purpose of evaluating the relevance, efficiency, effectiveness, impact, and sustainability of a project/program?
What is the main purpose of evaluating the relevance, efficiency, effectiveness, impact, and sustainability of a project/program?
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What is the benefit of using bullet points and flow diagrams in developing records and documents?
What is the benefit of using bullet points and flow diagrams in developing records and documents?
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What is the importance of clarity in developing records and documents?
What is the importance of clarity in developing records and documents?
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What is the purpose of preparing reports?
What is the purpose of preparing reports?
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Study Notes
Digital Reading Tape Measure
- Used for large straight line measurements
Vernier Caliper
- A sliding measuring device that can make inside, outside, and depth measurements with considerable accuracy
- Can take measurements as small as 0.001" (0.025 mm)
- May have a dial gauge attached, which makes the "thousandths" part of a measurement easier to read
- Can take inside, outside, and depth measurements to within hundredths or thousandths of a millimeter or thousandths of an inch
- Parts include:
- Inside diameter measuring jaws
- Outside diameter measuring jaws
- Stop screw
- Vernier scale
- Main scale
- Depth rod measurement
- Depth rod
Thickness Gauges
- Also known as "feeler" gauges
- Used to measure small distances, such as clearance between two parts
- Example: checking the clearance between the rocker arm and valve stem in an engine
Tachometers
- Used to measure engine speed
- Available in analog and digital types
- Digital meters are the most common
- Can be connected to the ignition system to monitor ignition pulses, which are then converted to engine speed
- Inductive pickup tachometers simplify rpm testing and can be used for distributorless ignition systems
Timing Light Analyzer
- Used to check ignition timing
- Connected to the battery terminals and has an inductive clamp that fits over the number 1 spark plug wire
- Emits a beam of light each time the spark plug fires
- Some timing lights have a timing advance knob that can be used to check spark advance
- Can electronically measure timing advance as the engine rpm is increased and display it on an LED display
Spark Tester
- A fake spark plug used to determine if the ignition problem is caused by something in the primary or secondary circuit
- Constructed like a spark plug but without a ground electrode
- Has a grounding clamp instead of an electrode
- Inserted into the spark plug end of an ignition cable
Dial Indicator
- Used to measure small distances
- Has a dial face with a classification and measuring range
- Has a counter that indicates the number of turns the pointer is turned by
- How to read dial indicators:
- Make certain that the best mounting attachment and a suitable contact point are selected
- Ensure the dial indicator and base are firmly attached and the measuring rod is parallel to the object being measured
- Check that the rod, spindle, and dial needle move freely and the dial range is adjusted to measure the full movement of the object
- Turn the dial face so that the zero line is placed over the dial needle
- Take at least two readings and move or turn the object against its stop or end of travel to ensure accuracy
Checking and Adjusting Measuring/Testing Devices
- How to adjust vernier caliper:
- Clean the legs and check the tool for accuracy
- Clean the objects to be measured and slide the movable leg close to the surface
- Lock the leg with the lock screw to the bar
- Be certain that the legs are parallel to the object to be measured and do not force the legs together
- Adjust the leg with adequate force so that the object just sits between the two legs
- Find the first mark on the Vernier scale that lines up perfectly with any line on the main scale
- Add the main scale and Vernier scale results together to get the final answer
- Using a micrometer:
- Position the object to be measured on the anvil
- Clamp the object between the anvil and spindle
- Rotate the thimble using the ratchet speeder until the spindle is close to the object
- Carefully turn the ratchet as you approach the surface to be measured and continue until the spindle stops rotating
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Description
This quiz covers the uses and measurements of digital reading tape measures and Vernier Calipers, including their accuracy and applications.