Which of these items is checked in a pre-trip inspection?

a. Wiper blades.
b. Cargo securement.
c. Whether all vehicle lights are working and are clean.
d. All of the above.


d. All of the above.

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A wedge is not a type of inclined plane

Indicate whether the statement is true or false

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Dorsiflexion involves ________ at the ankle joint and ________ of the foot.

A) flexion; elevation of the sole B) extension; elevation of the heel C) flexion; elevation of the heel D) extension; flexion of the sole E) adduction; flexion of the heel

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If PLC rungs with BCD and comparison instructions do not produce the correct results, then first verify that the data from the process is correct by ________

A) Inserting a TND instruction B) Viewing the dialog boxes C) Inserting a SUS instruction D) None of the above

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A periodic rectangular pulse train f(t) shown below has amplitude A = 1 V, pulse width ? = 0.35 ms, and period T0 = 1 ms. The pulse is centered at t = 0.

(a) Find the fundamental frequency f0 of this signal. (b) Find the duty cycle d of this signal. (c) Find the numerical values of a0, and an for 1 ? n ? 5. (d) Plot the one-sided magnitude spectrum for 0 ? f ? 5f0. (e) Plot the one-sided phase spectrum for 0 ? f ? 5f0. (f) Find the expression of approximation ˆ( ) f t consisting of the dc component, the fundamental component, the second harmonic component, and the third harmonic component of its trigonometric Fourier series (sum of cosines). The coefficients must be numbers.

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