NEW
Font size
WorksheetsIED Unit 2 Review
Total questions: 26
Worksheet time: 15mins
In engineering, the term variation refers to:
A mistake made during manufacturing
Differences between objects of the same type
A defect that must be eliminated
A design flaw
Why can no two manufactured parts be exactly the same?
Machines are poorly designed
Engineers allow errors
Variation is inevitable in manufacturing
Materials cannot be measured
What is the primary purpose of a tolerance?
To eliminate variation
To increase cost
To specify acceptable variation
To improve appearance
Which situation best demonstrates the need for tolerance?
Choosing a color for a product
Ensuring a pin fits into a hole
Advertising a product
Packaging a product
What might occur if tolerances are not specified on a drawing?
The part will be stronger
Manufacturing costs will drop
Parts may not fit or function properly
Production time will decrease
A bilateral tolerance is typically shown using:
Two limit values
A plus/minus (±) symbol
A single number
A note in the title block
Limit dimensions specify:
Only the target dimension
Only the tolerance value
The maximum and minimum allowable sizes
The cost of manufacturing
Why are tolerances critical for interchangeable parts?
To reduce weight
To ensure consistent fit and function
To improve appearance
To speed up design
Which product most depends on interchangeable parts?
A custom sculpture
A mass-produced engine
A hand-painted vase
A prototype model
Why should you avoid compressing a part when measuring it?
It damages the tool
It changes the measurement
It wastes time
It increases tolerance
Accuracy refers to:
How close a measurement is to the true value
How consistent measurements are
The number of decimal places
The tolerance size
Precision refers to:
How close a value is to the target
How expensive the equipment is
How repeatable measurements are
The size of the part
A normal distribution is best described as:
Skewed to one side
Random with no pattern
Bell-shaped and symmetrical
Flat and uniform
Approximately what percentage of data falls within one standard deviation of the mean?
50%
68%
95%
99.7%
Which fit relies on friction to hold parts together?
Clearance fit
Transition fit
Interference fit
Slip fit
What does allowance describe?
Manufacturing cost
Maximum clearance or interference
Total tolerance
Average dimension
Which fit does NOT rely on friction to hold parts together?
Interference fit
Clearance fit
Transition fit
Slip fit
Increasing the number of significant digits in a dimension generally results in
Why do tighter tolerances increase manufacturing cost?
A bilateral tolerance is typically shown using:
A +/- symbol
Which tool is used in this unit to measure hole and pin diameters?
Dial Caliper
What are hidden lines used for?
To represent visible features
To represent features not visible from the current view
To represent the color of an object
To represent the size of an object.
These are very light lines used in the process of constructing a drawing. They are for the drafter's use only.
centerlines
short break lines
border lines
construction lines
These are very heavy lines used to form a boundary.
centerlines
short break lines
border lines
construction lines
Indicates the centers of holes and symmetrical objects such as doors and windows.
centerlines
short break lines
border lines
construction lines
Used to show size and location of an object or feature.
centerlines
dimension lines
object lines
border line
