MAE 1351 EXAM 3 QUESTIONS & ANSWERS 2024/2025
Total runout (runout tolerance)[two arrows] - ANSWERS3D control for rotating parts relative to a datum axis. (cylindrical surface = controls circularity, straightness, taper, concentricity, and surface profile; flat surface = controls wobble, perpe...
Total runout (runout tolerance)[two arrows] - ANSWERS3D control for rotating parts relative to a datum
axis. (cylindrical surface = controls circularity, straightness, taper, concentricity, and surface profile; flat
surface = controls wobble, perpendicularity, and flatness)
Basic dimensions (those with a box around them)... - ANSWERSare theoretically exact and locate the
perfect position of features from clearly identified datums
The feature control frame - ANSWERScontains the geometric characteristic symbol, the geometric
tolerance, and the relative datums
Free running fit - ANSWERSnot for use where accuracy is essential, but are good for large temperature
variations, high running speeds, and heavy journal pressures
A dimension is expressed to the same number of inches of decimal places as its ________. Zeros are
added to the _____ of the decimal point where necessary - ANSWERStolerance; right
ASME stands for - ANSWERSAmerican Society of Mechanical Engineers
Most drawings conform to the ______ system or they conform to the ____ system - ANSWERSSI; U.S.
Customary
Where the dimension is less than one millimeter... - ANSWERSa zero precedes the decimal point
Where the dimension is a whole millimeter... - ANSWERSneither the decimal point nor the zero is shown
Where the dimension exceeds a whole number by a decimal fraction of one millimeter... - ANSWERSthe
last digit to the right of the decimal point is not followed by a zero
, T/F commas and spaces shall be used to separate digits into groups in specifying millimeter dimensions
on drawings - ANSWERSfalse
T/F A zero is not used before the decimal point for values less than one inch - ANSWERStrue
contour rule or contour dimensioning - ANSWERSeach dimension should be placed in the view where
the contour shape is best shown
T/F Dimensions should appear multiple times in different views on a drawing - ANSWERSfalse, they
should only apper once
Dimensioning and tolerancing shall be complete so that... - ANSWERSthere is full understanding of the
characteristic of each feature
circles are typically dimensioned as - ANSWERSdiameters
arcs are dimensioned as - ANSWERSradii
T/F you should give dimensions between holes vs dimensioning the holes from the end of the part -
ANSWERSTrue
Baseline Dimensioning - ANSWERSall of the dimensions in a given direction originate from a base or
datum (frequently used for CNC machines)
Chain Dimensioning - ANSWERSfeatures are dimensioned relative to one another (used when a part
function requires that features be related to one another)
T/F chain dimensioning is often preferred over baseline - ANSWERSFalse, Baseline dimensioning is
prefrred
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