The load can only be applied between points B and D of the girder shown in Figure P12.21. Draw the influence lines for the reaction at A, the moment at D, and the shear to the right of support A.


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Describe the construction and operation of a vacuum circuit breaker.

What will be an ideal response?

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Before deciding to purchase or install an open-loop system, the ____________________ must be evaluated first.

Fill in the blank(s) with the appropriate word(s).

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Which of the following reduce tire adhesion (traction)?

A) Shimmy B) Wheel tramp C) Unsprung weight D) All of these reduce tire adhesion

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An IC optocoupler designed to allow an external object to block the light path between the photoemitter and the photodetector is known as a

A) optical diode B) optointerrupter C) optomiser D) optointerpreter

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