NIMs Job Planning, Benchwork, and Layout

Front

What is the minimum pitch diameter for an external thread 7/16­14 UNC ­ 2A?

Back

0.385 inches

Front

What is the purpose of a scriber?

Back

To layout fine lines on a metal surface.

Front

What is the taper per foot for a piece 7.5 inches long with a 0.056 taper?

Back

0.0896 inch taper per foot.

Front

What type of tap is most commonly found in a toolroom for creating threads for machine screws?

Back

Plug tap.

Front

What instrument is used on a surface plate for accurate layout of details?

Back

Vernier height gage.

Front

Define 'pitch diameter' in the context of threads.

Back

The diameter of an imaginary cylinder that passes through the threads at the point where the width of the thread and the width of the groove are equal.

Front

What is a 'taper' in machining?

Back

A gradual reduction in diameter or thickness of a workpiece.

Front

Explain the function of a 'combination set' in machining.

Back

A tool used for measuring and laying out angles, depths, and lengths.

Front

What is the difference between a 'plug tap' and a 'bottoming tap'?

Back

A plug tap is used for through holes, while a bottoming tap is used for blind holes.

Front

What is the significance of a 'sine bar' in layout work?

Back

It is used to measure and set angles accurately.