Term
| How do you take the reading on a micrometer? |
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Definition
| By noting the position of the thimble in comparison to the sleeve. |
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Term
| What part of a micrometer gives us a consistent reading with each measurement? |
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Definition
| The ratchet stop. It allows the user to close the micrometer with consistent pressure. |
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Term
| What is the range of Imperial micrometers? Metric? |
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Definition
| The range of each imperial micrometer is only 1 inch, the metric is 25mm. i.e. A one inch micrometer reads from 0 to 1 inch. A two inch micrometer reads from 1 to 2 inches. |
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Term
| What is the smallest discrimination that a Standard inch micrometer can read to? Standard metric? |
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Definition
| A standard inch micrometer can read to 0.001 inch. A metric can read to 0.01mm |
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Term
| What is the smallest discrimination that an imperial vernier micrometer can read to? A metric vernier micrometer? |
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Definition
| An imperial vernier micrometer can read to 0.0001 inch. A metric vernier micrometer can read to 0.001mm |
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Term
| What is different about reading an inside micrometer verses a standard outside micrometer? |
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Definition
| The inside micrometer graduations are read in the opposite directions on both the sleeve and the spindle. Great care must be taken when reading them. |
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Term
| What is a telescoping gauge used for? What kind of measurement tool is it? |
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Definition
| A telescoping gauge is used for measuring bores, slots and recesses. It is an indirect or transfer type measuring tool. |
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Term
What is a small hole gauge used for?
What kind of measurement tool is it? |
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Definition
| A small hole gauge is used for holes that are too small for any other type of tool. It is an indirect or transfer type measuring tool. |
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Term
| What is a depth gauge used for? What kind of measurement tool is it? |
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Definition
| The depth gauge is used for measuring the depth of a hole, slot or recess. It is a direct measuring tool and there are 3 types. Micrometer depth gauges, vernier depth gauges and vernier calipers(with a depth rod) |
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Term
| A height gauge with a digital scale is known as a vernier height gauge. True/False |
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Definition
| False, a height gauge with a digital scale is known as a digital height gauge and is similar to a vernier height gauge in principle and operation but it uses a digital readout instead of a scale. A vernier height gauge has a physical vernier scale attached to the main scale. |
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Term
| The __________ is the most accurate measuring instrument commonly available to machinists. |
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Definition
| The outside micrometer is the most accurate measuring instrument commonly available to machinists. |
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Term
| If a micrometer is out of calibration what should you do? |
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Definition
| First put a piece of paper between the anvil and the spindle and close them together and remove the paper, if it still does not read 0, repeat this process. If after this it does not read zero re-calibrate the micrometer with the adjusting wrench in the small hole on the back of the sleeve until it line up with the 0 on the thimble/barrel while it is closed. |
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Term
| When measuring a round workpiece with a micrometer make sure the micrometer is positioned over the _____ diameter |
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Definition
| When measuring a round workpiece with a micrometer make sure the micrometer is positioned over the true diameter. |
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Term
| The screw of an imperial micrometer has a pitch of ____. The metric pitch is ____. |
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Definition
| The screw of an imperial micrometer has a pitch of 0.025 inch. The metric pitch is 0.5mm. |
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Term
The four (4) mechanisms used in precision measuring tools are:
a) vernier scales, micrometer screws, geared dials and electronic digital readouts
b) vernier scales, micrometer screws, geared dials and graduated scales
c) micrometer screws, geared dials, electronic digital readouts and transfer arms
d) vernier scales, geared dials, electronic digital readouts and gauges. |
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Definition
| a) The four(4) mechanisms used in precision measuring tools are vernier scales, micrometer screws, geared dials and electronic digital readouts. |
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Term
A standard micrometer can be read to:
a) 0.001 in or 0.01 mm
b) 0.001 in or 0.02 mm
c) 0.010 in or 0.001 mm
d) 0.0001 in or 0.001 mm |
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Definition
| a) A standard micrometer can be read to 0.001 in or 0.01 mm. |
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Term
The most accurate and reliable tool for measuring the diameter of a shaft is the:
a) vernier caliper
b) electronic dial caliper
c) telescoping gauge
d) outside micrometer |
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Definition
| d) The most accurate and reliable tool for measuring the diameter of a shaft is the outside micrometer. |
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Term
The tool that can measure outside diameters, inside diameters and depths is the:
a) vernier caliper
b) height gauge
c) universal caliper
d) inside micrometer |
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Definition
| a) The tool that can measure outside diameters, inside diameters and depths is the vernier caliper. |
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Term
An example of a transfer-type measuring tool is a:
a) small hole gauge
b) micrometer
c) height gauge
d) vernier depth gauge |
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Definition
| a) An example of a transfer-type measuring tool is a small hole gauge. |
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Term
| How would you check the zero setting of a 2 inch micrometer? |
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Definition
| You would close the micrometer on a 1 inch standard. Each imperial micrometer only has 1 inch of travel. |
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Term
If the micrometer does not read zero when closed, adjust the:
a) anvil
b) sleeve
c) thimble
d) nut |
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Definition
| b) If the micrometer does not read zero when closed, adjust the sleeve. |
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Term
The measuring tool that can NOT be adjusted for wear is the:
a) vernier caliper
b) inside micrometer
c) micrometer depth gauge
d) telescoping gauge |
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Definition
| a) The measuring tool that can NOT be adjusted for wear is the vernier caliper. |
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Term
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Definition
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Term
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Definition
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Term
| What should you do before inspecting a parts size using a vernier height gauge? |
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Definition
| Clean the bottom of the height gauge as well as the surface plate and workpiece. Check to see that the height gauge is properly calibrated and that the measuring tool is in good condition. Once done, put the part near the height gauge and raise the arm above the workpiece and gently lower it until it makes contact with the part. Read the scale. |
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