Sectional steel scaffolding is assembled by a carpenter for the mason.
Answer the following statement true (T) or false (F)
False
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Photo-operated devices fall into one of three categories. What are the categories?
What will be an ideal response?
In GD&T, ____________________ of a surface specifies a 3-D tolerance zone defined by two contoured surfaces. When a datum reference is not specified, the tolerance controls only the shape of the contour. When datums are specified, the tolerance controls the shape of the contour as well as the size and/or location of the contour.
Fill in the blank(s) with the appropriate word(s).
Which one of the following statements about RLL mechanical counter conversion to PLC ladder logic is NOT true?
A) Replace NO mechanical counter output contacts with XIO instructions, and NC mechanical counter output contacts with XIC instructions. B) Set the PLC counter preset value to the mechanical counter output trigger value. C) Verify that the PLC module's I/O matches the current sinking/sourcing requirements of the field devices. D) Replace the mechanical up counter with CTU, and mechanical down counter with CTD.
Technician A says the flywheel is attached to the engine crankshaft and rotates at engine speed. Technician B says the pressure plate also rotates at engine speed. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technicians A nor B