DML Test 1 Questions & Answers
What is the primary piece of safety equipment in the machine shop? - ✔✔Safety Glasses
What can you do if you wear prescription eyeglasses? - ✔✔Wear safety goggles or a full face
shield.
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DML Test 1 Questions & Answers
What is the primary piece of safety equipment in the machine shop? - ✔✔Safety Glasses
What can you do if you wear prescription eyeglasses? - ✔✔Wear safety goggles or a full face
shield. Prescription safety glasses may also be worn.
Describe proper dress for Machine Shop. - ✔✔Closed toed shoes, short sleeves, short or properly
secured hair, no rings and wristwatches, shop apron, or a shop coat with no sleeves.
What can be done to control grinding dust? - ✔✔Use of cutting fluid and vacuum dust collectors.
What hazards exist from coolants, oils, and solvents? - ✔✔They may cause skin rashes or
infections.
Describe proper lifting procedure. - ✔✔bend knees, squat and lift with your legs, keeping your
back straight.
Describe at least two compressed air hazards. - ✔✔Compressed air can propel chips through the
air, implant dirt into skin, and possibly injure eardrums.
Describe good housekeeping procedures. - ✔✔Good housekeeping includes: cleaning up spills,
keeping material off the floor, and keeping aisles clear of obstructions.
How should long pieces of material be carried? - ✔✔In vertical position, or with a person on
each end.
List at least five points from the safety checklist for a machine tool. - ✔✔Do I know how to
operate this machine? What are potential hazards?
Are all guards in place?
Are my procedures safe?
Am I doing something I probably should not do?
Have I made all proper adjustments and tightened all locking bolts and clamps?
Is the workpiece secured properly?
Do I have proper safety equipment?
Do I know where the stop switch is?
Do I think about safety in everything I do?
What is the difference in a bolt and a screw? - ✔✔A bolt goes through parts being assembled and
is tightened with a nut. A screw is used when a part is internally threaded and no nut is needed.
How much thread engagement is recommended when a screw is used in an assembly? - ✔✔The
minimum recommended thread engagement for a screw in an assembly is as much as the screw
diameter; a better assembly will result when 1.5 times the diameter is used.
When are class 3 threads used? - ✔✔Class 2 threads are found on most screws, nuts, and bolts
used in the manufacturing industry. Studs used on many types of machines are examples of class
3 fits.
What is the difference between a machine bolt and a cap screw? - ✔✔Machine bolts are not
machined to the precise dimensions of cap screws. Machine bolts have coarse threads, whereas
cap screws may have coarse or fine threads. Machine bolts have many uses in the construction
industry, and cap screws are usually used for precision assemblies.
What is the outside diameter of a No. 8 machine screw? - ✔✔D = (number of the machine screw
[8]) x .013in + .060in. So, the outside diameter of a No. 8 screw is .164in.
Where are setscrews used?
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