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Millwright-Installation & Levelling Exam Questions and Answers 2023 with complete

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Millwright-Installation & Levelling Exam Questions and Answers 2023 with complete @STUVATE-STUVIA What percent of mechanical breakdowns are due to misalignment? - 70% A "set" of machines (such as a driver-driven unit) share a common mounting called _____________ - Baseplates Machines that d...

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  • 28 de agosto de 2023
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Millwright -Installation & Levelling Exam Questions and Answers 2023 with complete @STUVATE -STUVIA What percent of mechanical breakdowns are due to misalignment? - 70% A "set" of machines (such as a driver -driven unit) share a common mounting called _____________ - Baseplates Machines that do not share a common base plate are fastened to __________ - Soleplates (or sub -bedplates) Primary equipment is set into place when? - First Prime movers (also referred to as drives or drivers) are installed when - Third Define "benchmark" - A point usually established by a surveyor. Define "datum" - point usua lly established by a millwright When are prime movers installed? - Third In some situations the transmission is considered to be the __________ unit - Primary Why should you rotate the shaft on machines in storage? - To prevent false brinelling How thic k should baseplates and soleplates be? - Same thickness as the unit feet What purpose do vibration isolators serve? - To prevent vibration from being transfered to adjacent equipment, and prevent the amplification of internal stresses which cause misalig hnment and wear What "minus elevation" is a concrete foundation usually poured to? - 19mm -38mm low Smaller commercially available anchors are often referred to as ____________ - Cinch anchors Hold down bolts, and hold down screws are often referred to as __________ - Anchor bolts Straight anchor bolts shoild be set into foundations at least ___ times their diameter - 25 What is the purose of pipe (tube) anchor bolts? - To allow for some bolt adjustment after the foundation is poured Boxed anchor bolts are liable to ______ - Break. They are installed in a channels that are formed into the foundation which allows them to be replaced. They also allow for small misalignment When there are no drawings, and achor bolt locations are determined from the existi ng baseplate, soleplates, or base of the machine this is called ___ ________ - As built After the baseplate or sole plate has been positioned, levelled, and grouted, the anchor bolts are normally tightened to ____ of their yeild strength - 2/3 The relati onship of equipment to the structucture of the building is often refered to as the _________ _______ - Building tie -in What are the main refenence lines for installation of a mechanical system? - Machine centerline, lines parallel to machine centerline, lines square to machine centerline, and reference lines Usually a series of benchmarks are establised within the plant by a surveyor. Machinery is positioned ___ __________ from them - To elevation

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