AMS 375 Unit 4 Quiz/Test – Study Guide, Practice Questions & Revision Notes
Is the measurable size difference between two parts designed to
be placed together to form an assembly - ✔✔What is fit?
Permit relative freedom of motion between parts.
(.002/.005) - ✔✔What is clearance fit?
Are minimal clearance fits that allow
precise alignment and movement between two parts. (.000/.0005) - ✔✔What is close
tolerance fit?
Are considered to be tight fits between two parts. These dimensions are usually illustrated with
the letter "T" after the dimensional value. (.001T/.002T) - ✔✔What is interference fit?
Reduce vibration - ✔✔Purpose of fin stabilizers?
Is expressed as a minimum and maximum limit in part dimension - ✔✔What is allowance?
Is the amount of dimensional variation permitted on the surface of machined parts - ✔✔What
is tolerance?
When assembling two parts the female part is heated and the male part is chilled diminishing
the interference fit or creating a slight clearance fit during the assembly process - ✔✔What is
shrink fit?
Is the apparent radial motion of the surface of a turning rotor or shaft - ✔✔What is runout?
, Is a measurement usually taken at a specified location on a rotating shaft with a dial indicator
(one revolution) - ✔✔What is total indicated runout?
Is the shortest distance, located where two gears
operating pitch circles bisect, between the non-driving surfaces of adjacent teeth when the
working flanks are in contact - ✔✔What is backlash?
An area of roughened scratches or marks usually caused by foreign matter between moving
parts - ✔✔What is abrasion?
One or more indentations on bearing races usually : One or more indentations on bearing races
usually caused by high static loads or force during installation or removal - ✔✔What is
brinelling?
Polishing of one surface by sliding contact with a
smooth, harder surface - ✔✔What is burnishing?
Describes a condition caused by a rubbing action between two parts under light pressure which
results in wear - ✔✔What is chaffing?
breaking away of pieces of materia - ✔✔What is chipping?
Loss of metal by a chemical or electrochemical action - ✔✔What is corrosion?
A partial separation of the material caused by vibration, overloading, Internal stresses, defective
assembly, or fatigue - ✔✔What is cracks?
Loss of metal from the surface by mechanical action of foreign objects such as grit or fine sand -
✔✔What is erosion?
Is the measurable size difference between two parts designed to
be placed together to form an assembly - ✔✔What is fit?
Permit relative freedom of motion between parts.
(.002/.005) - ✔✔What is clearance fit?
Are minimal clearance fits that allow
precise alignment and movement between two parts. (.000/.0005) - ✔✔What is close
tolerance fit?
Are considered to be tight fits between two parts. These dimensions are usually illustrated with
the letter "T" after the dimensional value. (.001T/.002T) - ✔✔What is interference fit?
Reduce vibration - ✔✔Purpose of fin stabilizers?
Is expressed as a minimum and maximum limit in part dimension - ✔✔What is allowance?
Is the amount of dimensional variation permitted on the surface of machined parts - ✔✔What
is tolerance?
When assembling two parts the female part is heated and the male part is chilled diminishing
the interference fit or creating a slight clearance fit during the assembly process - ✔✔What is
shrink fit?
Is the apparent radial motion of the surface of a turning rotor or shaft - ✔✔What is runout?
, Is a measurement usually taken at a specified location on a rotating shaft with a dial indicator
(one revolution) - ✔✔What is total indicated runout?
Is the shortest distance, located where two gears
operating pitch circles bisect, between the non-driving surfaces of adjacent teeth when the
working flanks are in contact - ✔✔What is backlash?
An area of roughened scratches or marks usually caused by foreign matter between moving
parts - ✔✔What is abrasion?
One or more indentations on bearing races usually : One or more indentations on bearing races
usually caused by high static loads or force during installation or removal - ✔✔What is
brinelling?
Polishing of one surface by sliding contact with a
smooth, harder surface - ✔✔What is burnishing?
Describes a condition caused by a rubbing action between two parts under light pressure which
results in wear - ✔✔What is chaffing?
breaking away of pieces of materia - ✔✔What is chipping?
Loss of metal by a chemical or electrochemical action - ✔✔What is corrosion?
A partial separation of the material caused by vibration, overloading, Internal stresses, defective
assembly, or fatigue - ✔✔What is cracks?
Loss of metal from the surface by mechanical action of foreign objects such as grit or fine sand -
✔✔What is erosion?
