NIMS MMS Study Guide

Three types of cast irons

• Ductile, Gray, Malleable

• Aluminum, Bronze, Copper

• Steel, Iron, Zinc

• Plastic, Wood, Glass

Titanium metals

• Very strong, very lightweight, and very expensive. Used for critical applications for their high strength to weight ratio, including human implants and aerospace applications.

• Lightweight and inexpensive, commonly used in household items.

• Very heavy and strong, primarily used in construction materials.

• Moderately strong and affordable, used in everyday tools.

Sulphurized oil is:

• Used for tapping.

• A type of cooking oil.

• A lubricant for machinery.

• A cleaning agent for surfaces.

A dial bore gauge is used to inspect:

• Holes

• Surfaces

• Edges

• Threads

The Gage block buildup for a 15 degree angle on a 5 inch sine bar is?

• 1.2941

• 1.5000

• 1.2000

• 1.0000

What happens when the light field is broken while using a photoelectric presence sensing device (i.e., light curtain)?

• The machine continues to run without interruption.

• The machine stops and will not cycle or run.

• An alarm sounds to alert the operator.

• The light curtain resets automatically.

Purpose of wringing gage blocks before stacking

• To increase the thickness of the stack.

• To remove air from between the surfaces.

• To ensure proper alignment of the blocks.

• To prevent corrosion of the blocks.

Description of Hot Rolled Steel

• Black oxide coating; easy to file; throws a light yellow/straw colored spark when contact is made with a grinding wheel.

• Shiny surface; very brittle; produces a bright white spark when ground.

• Rough texture; difficult to file; emits a blue spark when ground.

• Coated with a layer of paint; flexible; produces no sparks when ground.

Function of a lockout device

• Prevents a machine from being started up, becoming electrically energized, and turned on.

• Allows a machine to operate continuously without interruption.

• Increases the speed of machine operation during maintenance.

• Enables remote control of the machine's functions.

If a process calls for tapping a ½-13 NC hole using a 27/64 drill size, what percentage of thread will be obtained?

• 50%

• 75%

• 80%

• 90%