1. What method of applying the proper force to an electrical
connection does this author feel "are not always required in
electrical connections and are often questionable. The washer must flatten
at the proper force and many applications do not use a high enough
force."
http://www.maintenanceworld.com/Articles/shackmann/thetrouble.html
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2. In this article, the author says, "It is important when
assembling bolted connections that a torque wrench be used and appropriate
torque values as received from ______ , codes, or standards be applied. It
has been noted that bolts tightened with a torque wrench can vary 30
percent on the same assembly. Consider what the variance would be if a
torque wrench is not used." Fill in the blank.
http://www.mt-online.com/articles/02-98em.cfm
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3. In this great article from EC&M for electricians, the
author says, "Once you tighten a split-ring lock washer to its rated
torque (indicated by a flattening of the lock washer), never reuse it. The
reason why? On the second use, the lock washer has only ______ of its
"memory," and therefore only ______ of its locking
ability." Fill in the blanks.
http://www.ecmweb.com/ar/electric_torque_wrenches_critical/
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4. Article ______ in the NEC makes the default value of torque the
same one that is used and listed in the UL testing procedure for the
connector. These default torque ratings are published in UL
Standards 486 A, B and C. Fill in the blank.
http://www.electricsmarts.com/content/handtools_torque.asp
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