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MMET 105 Final Exam with Complete Solutions
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MMET 105 Final Exam with Complete Solutions
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MMET 105 Final Exam with CompleteSolutions
What's the procedure for determining scale? Correct Ans-scale=object length/available length
-calculate the required scale for each direction (x,y,z)
-of the calculated scales, select the maximum
-for the maximum scale, round to the next higher standard scale
What are the standard English scales? Correct Ans-10 1=1' 1=10'
20 1=2' 1=20'
30 1=3' 1=30'
40 1=4' 1=40'
50 1=5' 1=50'
60 1=6' 1=60' etc
What are the standard metric scales? Correct Ans-1:1 1mm=1mm 1mm=10mm
1:2 1mm=2mm 1mm=20mm
1:2.5 1mm=2.5mm
1:3 1mm=3mm
1:4 1mm=4mm
1:5 1mm=5mm
1:7.5 1mm=7.5mm
,What's the scaling system for English drawings? Correct Ans--standard measurement unit is
the INCH
-dimensions expressed to nearest hundreths or thousandths of an inch (two to three decimal
places)
-Scale: 1=XX units
Whats the scaling system for metric drawings? Correct Ans--standard measurement unit is the
mm
-dimensions typically in whole mm's
-must be written unitless on both sides
-Scale 1:XX
Engineers Scale Correct Ans--the engineers scale takes the inch and divides it into parts
-the number of divisions is listed to the left of the scale
-each ten divisions are numbered
Define auxiliary views Correct Ans--used to create truesize views of surfaces that do not
appear true size in any orthographic view
-generally apply to inclined surfaces
-true sizes are often necessary for pattern layouts
-are created by transferring distances from a folding line to each orthographic views
, Primary Auxiliary View Correct Ans-projected directly from an orthographic view
Secondary Auxiliary View Correct Ans-projected from a primary auxiliary view
Auxiliary Planes Correct Ans--auxiliary plane is parallel to the inclined surface
-is perpendicular to a principal projection plane (e.g. frontal_ and hinged to it
-the folding plane is labeled F/1 for the Frontal 1st Auxiliary plane
Define Dimensioning Correct Ans--dimensions allow a part to be manufactured
-always in real world unit
-dimensions should be applied in a concise, coherent manner
Unidirectional Dimensions Correct Ans-are read from lower left corner of sheet
Aligned Dimensions Correct Ans-align with individual dimension lines (we don't use this)
A zero may precede a ___ value but not ____ dimensions Correct Ans-metric, English
Cylinders are dimensioned in Correct Ans-rectangular view
Holes are dimensioned in Correct Ans-circular view
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