A Manufacturer of Windows Produces One Type That Has a Plastic

question 100

Multiple Choice

A manufacturer of windows produces one type that has a plastic coating.The specification limits for the plastic coating are 30 and 70.From time to time the plastic coating can become uneven.Therefore,in order to keep the coating as even as possible,thickness measurements are periodically taken at four different locations on the window.15 subgroups were observed,each consisting of four thickness measurements,with the following results: mean of the means = = 50.05,and average range of 8.85.Calculate the control limits for the R chart.

• A)[3.07,14.63]
• B)[6.57,11.13]
• C)[0,35.40]
• D)[0,20.20]

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Definitions:

Pilot Devices

Controls, such as buttons and switches, used to operate machinery or equipment indirectly.

Motor Control Circuits

Electrical circuits specifically designed to control the performance and operation of electric motors, including starting, stopping, and speed control.

Hand-off-automatic Circuit

A control circuit configuration that allows an operator to select between manual, off, or automatic operation of a device or system.

Operator

An individual or entity that controls, manages, or manipulates machinery, equipment, or systems.