Chapter 5 DIMENSIONS, SURFACES, AND THEIR MEASUREMENT
Precision is the degree of repeatability in the measurement process: (a) true or (b) false?
true
T/F: Dimensions are the linear or angular sizes of a component specified on the part drawing?
True
Surface roughness can be measured as either an arithmetic average (AA) or a root-mean-square (RMS) average. Which value is almost always greater for most surfaces? (a) arithmetic average (b) root-mean-square average
b
Which one of the following manufacturing processes is likely to result in the best surface finish? (a) arc welding, (b) grinding, (c) machining, (d) sand casting, or (e) sawing
b
Thermal energy is normally associated with which of the following changes in the altered layer (three best answers)? (a) cracks (b) hardness variations (c) heat-affected zone (d)plastic deformation (e) recrystallization (f) voids
b, c, e
Which of the following are likely to be GO/NO-GO gages (three correct answers)? (a) gage blocks (b) limit gage (c) master gage (d) plug gage (e) snap gage
b, d, e
Accuracy is the degree to which the measured value agrees with the true value of the quantity of interest: (a) true or (b) false?
true
Which of the following two geometric terms have the same meaning: (a) circularity, (b)concentricity, (c) cylindricity, and (d) roundness?
a and d
Surface texture includes which of the following characteristics of a surface (three correct answers)? (a) deviations from the nominal surface (b) feed marks of the tool that produced the surface (c) hardness variations (d) oil films (e) surface cracks
a, b, e
In a GO/NO-GO gauge, which one of the following best describes the function of the GO gage? (a) checks the limit of maximum tolerance (b) checks the maximum material condition (c) checks the maximum size (d) checks the minimum material condition (e)checks the minimum size
b
In inspection, which procedure provides more information: (a) gaging or (b) measurement?
b
A tolerance is which one of the following: (a) clearance between a shaft and a mating hole (b) measurement error (c) total permissible variation from a specified dimension (d) variation in manufacturing?
c
When tolerance is specified in both the positive and negative directions from the nominal dimension, it is called which one of the following? (a) bidirectional tolerance (b) bifurcated tolerance (c) bilateral tolerance (d) limit tolerance (e) symmetrical tolerance
c
An outside micrometer is appropriate for measuring which of the following (two correct answers)? (a) hole depth (b) hole diameter (c) part length (d) shaft diameter (e) surface roughness
c and d
Which one of the following manufacturing processes is likely to result in the worst surface finish? (a) cold rolling, (b) grinding, (c) machining, (d) sand casting, or (e) sawing
d or e
Which of the following measurement instruments are considered to be graduated measuring devices (three correct answers)? (a) divider (b) limit gage (c) sine bar (d) slide caliper (e) snap gage (f) steel rule (g) vernier caliper
d, f, g
A surface plate is most typically made of which one of the following materials? (a) aluminum oxide ceramic (b) cast iron (c) granite (d) hard polymers (e) stainless steel
granite
Surface texture is included within the scope of surface integrity: (a) true or (b) false?
true