Download NIMS MEASUREMENT STUDY GUIDE Sulphurized oil is used for

NIMS MEASUREMENT STUDY GUIDE
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Sulphurized oil is used for tapping.
The smallest diameter acceptable for this hole is .9980
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For safety, chips should be removed a milling or drilling machine table with a brush.
In addition to knowing how to work as a machinist, it is important for your safety and the
safety of your fellow workers to know first aid and emergency procedures.
The Occupational Safety and Health Administration is the governmental agency that
regulates safety and health requirements for industry.
To remove materials (solids) lodged in the eye pull the top lid over the bottom lashes.
If a process calls for ½” -13 NC hole using a 27/64 drill size 75 % of a thread will be
obtained.
On a hazardous material identification guide, the degree of hazard is measured by a
numbering system. 4 is the most hazardous.
B is a double-cut file.
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In SPC range refers to number of parts between samples.
Not having a handle on the file is a common cause of injury when using a hand file.
The quickest and most accurate method for checking the height of two or more
workpieces is to use the surface plate, gage plates, and a Vernier height gage.
A sampling plan provides the dimensions to inspect.
The specific machine information concerning lubrication/maintenance is found in the
Preventative Maintenance Manual.
Safety meetings are a good place to gain knowledge of new chemicals used in the
workplace and information contained in the MSDS sheet.
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This common symbol refers to counterbore/spotface.
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The correct reading of the 1-“-2” Micrometer in the picture is 1.373.
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Long thin parts have been ground and the flatness is out of tolerance. A possible cause is
machine foundation is inadequate.
The gage block buildup for a 15 degree angle on a 5-inch sine bar is 1.2941”.
The acronym MSDS stands for Material Safety Data Sheet in a typical manufacturing
environment.
A part is considered rejected when it is out of tolerance.
The acronym LEL can be found on all material safety data sheets. This stands for Lower
Explosive Limit.
Surface finish can be checked with a comparison chart.
The most important reason for the disposal of rags and wipes after uses is the fire hazard
potential.
Caution must be given to the disposal of cleaning fluids that are potential health hazards
when maintaining the safety of your work area.
The correct reading of the 0”-1” depth micrometer in the picture is .332
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Pitch is the dimension that is checked when measuring screw threads with a thread
micrometer.
The purpose of wringing gage blocks before stacking them is to remove air between the
surfaces.
The acronym TLV can be found on all material safety data sheets. This stands for
Threshold Limit Value
Reamed holes can become oversized due to reaming too much material.
To measure an angled surface parallel to a reference surface, an angle plate should be
used.
Using a cloth to clean away cuttings is NOT considered good safety practice for an
operator working on a milling machine.
While machining a block of tough material using a high speed steel cutter, excessive tool
wear begins to occur. The first thing to do is decrease spindle speed.
None ferrous metals is a classified metal that does not have Iron as its basic ingredient.
A process calls for a slip or sliding fit for a 1.000” dia. Shaft to fit into a hole. The
clearance between the shaft and the hole should be .0009.
1015 is the steel that has the lowest carbon count.
The correct reading of the dial caliper in the picture is .658.
A process plan calls for a slot .500” + .000 - .002” wide by 1/8 deep to be milled on a
vertical milling machine. The proper process to mill the slot is one roughing pass using a
3/8” dia. End mill and one finish pass using a ½” dia. Cutter.
One cause of tapped holes becoming too tight might be tap wear.
When hand filed surface show excess scratching, one cause may be clogged with chips
(pinning).
The tool (from the picture given) that could NOT be used to measure the diameter of this
whole is the depth micrometer.
The instructions for general machine maintenance are found in the maintenance manual.
A dial bore gage is used to inspect holes.
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Using the Machinery’s Handbook, 4 is the correct number of blocks you can stack to
guarantee the most accurate reading for the possible height of 3.6875” with an 81 gage
block set.
Before mounting a new chunk on a lathe the taper/spindle should be checked for dirt or
metal chips.
A sampling of parts is the number of random parts to inspect.
Hot Rolled Steel- The bar has a black rough surface; dusty chip when filed; and orange
spark when ground.
If accuracy is most important, the depth caliper is the measuring tool (from the pictures
given) would be used to measure the depth of this pocket.
D
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Metal cuttings are considered a part of the trade.
When working where materials are stored overhead or where overhead cranes are being
used; hard hats should be worn.
Loose clothing, long hair, and dangling jewelry are potential hazards when operating
turning machinery.
To select the correct type of measuring tools to inspect a part, the first items to review are
the tolerances of the dimensions you are inspecting.
While drilling a through hole in a drilling operation, the drill is most likely to grab in a
workpiece as it breaks through the bottom of the workpiece.
The correct reading of the scale in the picture is 11/16 inch.
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The geometric characteristics symbol refers to the parallelism of the surface.
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If using a set of pin gages to check the size of a .257” – diameter hole and 17/64” pin
slips into a hole, the hole is oversized.
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The correct reading of the metric micrometer in this picture is 9.520 mm.
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One surface of the workpiece is to be finished to a 2 micro inch finish.
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If accuracy is most important, the dial caliper is the measuring tool you would use to
measure the width of this pocket.
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When lifting heavy objects, the back should be kept as straight as possible.