The preferred type of flange for very severe service conditions is the _____ flange.
a. weld neck
b. slip-on
c. socket weld
d. threaded
a. weld neck
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The first air-conditioning system was patented in 1844 by:
A) Benjamin Franklin. B) Thomas Edison. C) John Gorrie. D) Willis Carrier.
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Saliva contains the chemical enzymes salivary amylase and __________.
Fill in the blank(s) with the appropriate word(s).
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In English equitation, the reins are carried in one hand
Indicate whether the statement is true or false.
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The invention of the ____________________ engine had a revolutionary effect on agriculture
Fill in the blank(s) with correct word
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