In a beam bridge, the end supports of a single span are called _____.


a. amendments
b. trusses
c. abutments
d. piers


c. abutments

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Inverters are used not only to vary the speed of the squirrel-cage motor, but also to vary its ____, start the motor slowly and smoothly, and increase the motor's efficiency.

A. current B. torque C. horsepower rating D. voltage rating

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These lines are used to identify alternate positions of moving parts.

A. section lines B. break lines C. chain lines D. phantom lines E. stitch lines

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Elements are:

A) Pressure and temperature. B) Force and pressure. C) The forces of velocity pressure and density upon a substance. D) Naturally occurring chemicals.

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Idler sprockets should be placed:

A. on the slack side of the drive. B. on the tension side of the drive. C. either side of the drive. D. on all drives.

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