For a linear system with input x(t) and output y(t), find the impulse response for the following cases:


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The purpose of a sealing fitting is to _____.

a. carry wires through conduit and other types of raceways b. bundle wires and cables together c. connect conduit to boxes d. minimize the passage of gases, vapors, and flames through a conduit

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How is placement of the evaporator line determined when drawing a PH diagram of an operating system?

A) Draw a vertical line across the saturation curve on a constant enthalpy line equal to the system low-side absolute temperature. B) The evaporator line can be drawn anywhere that crosses the saturation curve as long as it is a horizontal line. C) Draw a horizontal line across the saturation curve on the constant pressure line equal to the system low-side absolute pressure. D) The evaporator line is always drawn on the horizontal line representing 50 psia absolute pressure.

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Which category of construction would typically be contracted out as design/build?

a. Residential b. Building construction c. Industrial d. Heavy construction

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If a conductor is coiled as in a relay coil, then passing current through it will ________ the magnetic field

A) not change B) decrease C) intensify D) Coils should not be coiled.

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