For the motor in Problem 7.1 and for a fan-type load, calculate the following, assuming that the supply frequency is reduced by 20%:

a. Motor speed
b. Starting torque
c. Starting current
d. Motor efficiency (ignore rotational and core losses)


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The maximum amount a beam is allowed to sag is ____".

A. 0.03 B. 0.23 C. 0.33 D. 0.333

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Currently, the _______________ military is the largest buyer of fuel in the world

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

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Which of the following correctly describes GVW?

A. weight of the vehicle B. weight of the load C. weight of the vehicle and its load D. weight of the vehicle minus its load

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What is the purpose of the bypass damper used in many zone systems?

A) To bypass low- and high-temperature limits on the equipment when only one zone is calling B) To allow outdoor air to bypass the equipment during zone ventilation mode C) To recirculate air that is not being used by the active zones D) To allow outdoor air to bypass the equipment during free cooling

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