Gas pressure is measured in which unit of measure?

A. inches of mercury
B. inches of water column
C. cfm
D. psi


Answer: B

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Steel is used for reinforcement because it _____

a. will not corrode b. has nearly the same temperature expansion and contraction rate as concrete c. has a lower temperature expansion and contraction rate than concrete d. is inexpensive

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Which of the following are indications of fatigue-type failures in gear components?

A. pitted and spalled tooth surfaces B. star-shaped fracture C. scalloped fracture pattern D. all of the above

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Using the chart in Figure 92-17, what problems can cause both a high superheat and a high subcooling?

What will be an ideal response?

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A transformer is to be used to match an 8- ? loudspeaker to a 500-? audio line. What is the turns ratio of the transformer, and what are the voltages at the primary and secondary terminals when 10 W of audio power is delivered to the speaker? Assume that the speaker is a resistive load and that the transformer is ideal.

Find: a) The turns ratio of the transformer. b) The voltages at the primary and secondary terminals when 10W of audio power is delivered to the speaker. Assumptions: The speaker is a resistive load and the transformer is ideal.

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