Chapter 2
Safety Glasses should be worn ______.
A) Most of the time
B) Only when working on machines
C) The entire time you are in the shop
D) All of the above
C) The entire time you are in the shop
Cutting fluids must do several things simultaneously, including _______.
A. protecting the workpiece from corrosion
B) protecting machine surface quality
C) reducing friction and cutting forces
D) All of the above.
D) All of the above.
The lathe operates on the principle _______.
A) of the cutter revolving against the work
B) that the controllable cutting tool can be moved vertically across the work
C) of the work revolving against the controllable cutting tool
D) All of the above.
C) of the work revolving against the controllable cutting tool
Soluble oils offer advantages over straight cutting fluids because they ______.
A) are cleaner to work with
B) require a wetting agent
C) flush away chips better
D) All of the above.
A) are cleaner to work with
When facing stock, a rounded "nubbin" of face material results if the cutting tool is
A) slightly above center
B) slightly below center
C) dull
D) None of the above.
A) slightly above center
Avoid using compressed air to clean chips from machine tools because ______.
A) it can create a dangerous environmental situation
B) flying chips may cause eye injuries
C) it could create a dangerous mist that might be injurious to your health
D) All of the above.
D) All of the above.
Carbide tooling _______.
A) requires cutting fluids with high cooling rates
B) operates at higher cutting speeds
C) generates higher cutting temperatures
D) All of the above.
E) None of the above.
D) All of the above.
Round and hexagonal stock will center automatically in a 3-jaw universal chuck because ______.
A) it works like a collet chuck
B) the jaws move simultaneously
C) it has a centering device
D) All of the above.
B) the jaws move simultaneously
If the live center on a lathe does not run true, the work will have diameters that are.
A) eccentric
B) concentric
C) out of round
D) All of the above.
A) eccentric
Why should oily rags be placed in an approved safety container?
A) The soiled rags will be easier to collect for cleaning.
B) It will prevent rags with metal slivers embedded in them from being used again.
C) They will be easier to inventory for replacement.
D) None of the above.
B) It will prevent rags with metal slivers embedded in them from being used again.
How should chips and shavings be removed from a machine tool?
With a brush not your hands
Mineral oils, when combined with animal and vegetable oils, have a tendency to become ______ and must be replaced periodically.
Rancid
In most lathe operations, you will be using a single-point cutting tool made of ________.
High speed steel
Compressed air is the most commonly employed _______ coolant.
Gaseous
To prevent rust from forming, a light coating of _______ should be applied to all machined surfaces.
Machine Oil
What is the purpose of awareness barriers?
To remind workers the area is dangerous
Chemical cutting fluids often contain a(n) _______ to provide moderate lubricating qualities.
Wetting agent
The half-nuts are only engaged for_______ and are not used as automatic feed for regular turning.
Thread cutting
What do long stringy chips indicate?
the tool is improperly sharpened
_________ cuts are made to reduce work diameter to approximate size.
Roughing
When working in an area contaminated by solvent fumes or dust be sure there is adequate _______.
Ventilation
For the most efficient removal of heat, how should cutting fluids be applied?
Flood the cutting tool and the area being machined
Cutting speed and feed govern what conditions?
Time needed to machine a job as well as the quality of the surface finish
Why must cutting fluids be filtered before being returned to the machine's coolant tank?
To remove chips and contaminants
What will occur if tools designed for machining steel are not honed?
the irregular edge will crumble when used